how to put safety valve in prestige pressure cooker made in china

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Insufficient information was available on the website which caused me to order this part. The part was the wrong size. The part should have included the model numbers for the pressure cookers for which this part was appropriate. There is no fix for this. After much investigation I concluded that I cannot get parts for my pressure cooker and so I threw it in the recycle bin. I must say that If this was indeed the part I needed it took a really long time to arrive as well. I threw the part in the recycle bin as well as it is more money and headache than I wanted to send it back.

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EMAIL DELIVERY ONLY: Download your extended warranty certificate by sharing your device details. The link is available under buyer/seller messages at www.amazon.in/msg and is also sent to your Amazon registered email ID.

CASHLESS & UNLIMITED REPAIRS: You DON’T PAY for any spare parts, labour or transportation charges. Unlimited repairs up to the invoice value of the device.

EASY TO REQUEST SERVICE: Download the Onsitego app to raise a repair request within 10 seconds or visit our website. You can also call us on our toll-free number 99205 99206.

COVERAGE: The plan covers all defects & malfunctions under the original manufacturer’s warranty. The plan starts the day after the manufacturer’s warranty ends. It does not cover physical or liquid damage, accessories, consumables or parts that are not covered under the standard manufacturer’s warranty.

ELIGIBILITY: The plan can be purchased only for new devices and WITHIN 9 MONTHS of device purchase. You can purchase this plan only for devices which have AT LEAST 1-YEAR manufacturer"s warranty valid in India. The sum of manufacturer’s warranty and extended warranty CANNOT EXCEED 5 YEARS.

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Your pressure cooker and dinner can be ruined with too much food or too little liquid.  Too much food could block the pressure valve while too little liquid can permanently damage the cooker’s metal, bakelite and silicone fittings.  Here’s everything you need to know to keep your pressure cooker on the level and dinner coming.

Max 1/2 Full for Beans, Rice, Grains, Dehydrated Foods and Fruit – These foods either expand during cooking or generate lots of foam (or both). Beans can swell to twice their size during cooking and some grains, even more.  They also generate lots of foam and bubbles – which climb up the sides of the cooker to spray out of the valves – plugging them up.  This class of ingredients should also be opened using Natural Release method – which avoids the foamy starchy, bubbly, goo from spraying out of the valve during the pressure release, too.

Max 2/3 Full for Everything Else – Foods that don’t generally get any larger during cooking, bubble or foam are in this category and this includes meats, vegetables, soups and stocks.

If your recipe has lots of different ingredients, say a soup with vegetables and some beans, then you can go up to 2/3 full but if you’re cooking only one primary ingredient, say a bean chili, then you should respect that ingredient’s maximum capacity – 1/2 full .

A pressure cooker’s maximum capacity is, in fact, a safety feature. In order for a pressure cooker to receive UL rating, their manual must contain text to this effect.

Pressure cooker maximum capacities apply to all pressure cookers types (electric, jiggler, weight-modified and spring valves), shapes (pressure pans, stock pot- and braiser-type cookers), sizes (from 1 to 12L) and origins (Europe, Asia, America). That’s because all pressure cookers have valves and safety mechanisms placed in the lid.

The maximum capacity recommendations are in place to ensure neither food nor cooking liquid interfere with, or trigger, the safety systems located in the lid. The NUMBER ONE REASON for pressure cooker mishaps usually involves someone not familiar with pressure cooking filling the cooker beyond the cooker’s recommended maximum capacity – ultimately blocking the pressure release valve.

Unfortunately, many pressure cookers do not have markings inside to delineate these maximums.  If your pressure cooker doesn’t, fill up the cooker with water to get a visual feel for the location. For example, my un-marked 6L Fagor Futurois 2/3 full when the water is just under where the handles attach and 1/2 full just above where the round bottom starts to go straight.

Liters and quarts are used interchangeably by pressure cooker manufacturers. So when you purchase a 6 quart pressure cooker if it"s made in the U.S. the cooker is exactly 6 quarts capacity, but if it"s made in Europe or China, even if the size is stated in quarts, the pressure cooker is really 6L (which is actually 6.34 quarts).

Cups are roughly equivalent to 250ml, they rounded down to the nearest cup measurement in the maximum capacity calculations. Whether your pressure cooker is measured in quarts or liters the max-fill calculations in U.S. cups will work.

If your pressure cooker size is not listed above, simply multiply its size by .5 to calculate the cooker’s 1/2 capacity and .66 to calculate 2/3 capacity.

For someone shopping for their first or second pressure cooker – the prime concern is how much food it will hold. Here is a table that describes the maximum capacity of some key representative ingredients. Remember that “Max” refers to both the ingredients and their cooking liquid.

One cup is roughly equivalent to the the dry ingredient reaching 250ml in a measuring pitcher (sorry we cannot give the quantities in grams as beans and rice differ in their weight between varieties).

A larger pressure cooker will need more steam to pressurize and will also need more liquid to boil and generate that steam.  Some pressure valves vent by function or design. While a spring valve releases little or no steam to keep a cooker at pressure, instead, a weight-modified or jiggler-type valvemust release pressure and steam rhythmically to maintain a set pressure. The extra venting means that a longer cooking time will evaporate more liquid, and the cooker will require more to keep it from running dry.

Some pressure cookers have a “min” line etched inside the cooker to make it easy to see if you’ve got enough liquid in them while others (usually the ones requiring more liquid) have a line with a 1/3 mark to indicate the minimum food and liquid requirement.

You can reach your pressure cooker’s minimum liquid requirement with stock, fruit juice,  a little wine or beer –  but not hard liquor (large quantities of alcohol will evaporate through the valve and the vapor will ignite).

Using advanced pressure cooking techniques you can calculate the liquid released by a vegetable or piece or meat in a recipe during pressure cooking – and use those liquids maintain pressure.  Here’s a handy chart that will get you half-way there. This technique has enough caveats to merit its own article – so I won’t explain it here. Any well-written pressure cooker recipe from a trusted source will have already made these calculations to get the most flavor from the pressure cooker.

There is no international pressure cooker  organization that sets a global standard.  Pressure cooker UL Rating, which is an American Appliance Testing standard, only states that a domestic pressure cooker “operate at a nominal pressure of 15 psi (103 kPa) or less.” While in Europe the CE rating, the equivalent to the American certification, state that a “simple pressure vessel” can be above .5 bar (7.2 psi) and below 50 bar (720 PSI) . American manufactured pressure cookers adhere to a standard for pressure canners set by USDA in 1917 – 15 psi.

While some European pressure cookers are sold world-wide many of these manufacturers make a separate model specifically for the American market that reaches 15 psi.  Some European manufacturers are switching to a single model distributed world-wide that reaches 15 psi. At the writing of this article,  American pressure cooker manufacturers only sell their pressure cookers in the United States.

All recipes and cooking time charts on this website are written to accommodate both “standard” and “non-standard” pressure cookers.  When necessary,  times are written in a range – standard pressure cookers should use the shorter cooking time (13 minutes) and non-standard pressure cookers the longer (20 minutes).

This comes down to the difference in measuring systems between the United States (imperial) and the rest of the world (metric).  Pressure in the rest of the world is measured  inkilopascals (kPa) and bars while the U.S.it is measured with pounds per square inch (psi).

European manufactured pressure cookers are designed to cook at 1 bar or 100 kpa (metric pressure measurements) and that translates to 14.5 psi (this is rounded up to 15 psi) but American manufactured pressure cookers are designed to reach a full 15 psi (see below, for information on electric pressure cookers).

The rise in pressure inside the pressure cooker directly correlates to the rise in boiling point – the maximum cooking temperature that can be achieved at a given pressure.

The pressure cooker adds pressure above the current atmospheric pressure. Since there is a pressure difference in the atmosphere between one altitude and another, the pressure cooker’s pressure will vary accordingly.

Moving up in the atmosphere, or going to higher altitude, the atmospheric pressure decreases.  So in Denver Colorado (about 5,000 feet) the atmospheric pressure averages only 12.2 psi- add 15 psi of pressure generated by the cooker and there the food is cooking at just 27.2 psi of absolute pressure -almost 3 psi less pressure than pressure cooking at sea level!

The same 15 psi pressure cooker will cook 15 psi in San Francisco, California (sea level) but only 12.5 psi in Denver, Colorado (5,000 feet).  Now, “standard pressure cooker” has become “non-standard” in Denver.  This means that the recipes will need the same timing adjustments used  for non-standard pressure cookers (see pie chart, above).

Increase pressure cooking time by 5% for every 1000 ft above 2000 ft elevation (see table, below). Multiply the recommended cooking time by the number on the table. The result will likely be a decimal value just round that up to the next minute.above...increase by..or multiply by..

The transformation from a Renaissance “bone digester” invented by French scientist Denis Papin (in 1689) to pressure canners (1905)  and finally to the pressure cooker we know today began in 1926. The Home Exhibition in Paris introduced the first model for home use. The pressure cooker made it out of Europe and into the United States via the 1939 New York Fair where the National Pressure Cooker Company launched the first U.S. model.

Aluminum pressure cookers took off in the U.S. and many companies began producing them. Then, America’s involvement in WWII halted the production of pressure cookers and their factories were dedicated to producing munitions for the overseas war.

Once the war ended, European and American pressure cooker manufacturers began to develop and produce pressure cookers independently from each other. While in America unscrupulous factories made and sold sub-standard pressure cookers – that eventually went on to mar the cooker’s reputation and halt innovation- European manufactures continued to develop, perfect and innovate their designs adding multiple redundant safety mechanisms, selectable pressure levels and more features.

The 90’s started the trickle of European manufactured pressure cookers, and their features into America. It’s also when the patent for the first electric pressure cooker was filed by Chinese scientist, Mr. Yong Guang Wang.  The electric pressure cooker was developed independently from stovetop pressure cookers in that they were based on the ever-popular electric rice cookers (hence the resemblance) and are manufactured in a range of pressures – depending on the manufacturer or design team.

At the time of the writing of this article, most electric pressure cookers reach 15 psi but they do not cook at 15 psi.  As illustrated by the graphic below – electric pressure cookers reach 15 psi briefly during the warming process.

Electric pressure cookers build pressure up to 15 psi but then maintain a lower pressure during the cooking.  In the  graph below the “operating pressure” is 11.6 even though the cooker reaches 15 psi while it’s building pressure. “Operating Pressure” is the true pressure at which an electric pressure cooker cooks.

Most instruction booklets have this information written in them. The number may be written in kPa, bar or PSI (use the table in this page to decode the approximate PSI).  There may be several terms used in conjunction with those numbers and they include:

Valve Release Pressure – the pressure at which the main regulating valve releases pressure (2 to 4 psi more than the operating pressure depending on the manufacturer).

Electric pressure cookers will have the “valve release pressure” written in very small text on the underside of the pressure release valve either on the plastic housing, or the metal part of the valve.

We are engaged in offering wide range of Pressure Cooker Safety Valves. The offered valve is manufactured using world class raw material and advanced methodology by our professionals. It is used in the fitting of various utensils and is hugely demanded in the market. Our precious clients can buy this Pressure Cooker Safety Valve at nominal costs.read more...

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The most complete system (made from 316L Surgical Steel) offered by Royal Prestige®. Enjoy the convenience of a cooking system that is ready to make all kinds of dishes, no matter how big your family is or how sophisticated your recipes are. This is the system you always wanted to have.

The most complete system (made from 316L Surgical Steel) offered by Royal Prestige®. Enjoy the convenience of a cooking system that is ready to make all kinds of dishes, no matter how big your family is or how sophisticated your recipes are. This is the system you always wanted to have.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Our Wok will help you prepare the most creative recipes. Use it to make your favourite stir-fries or Chinese rice with seafood and seasonal vegetables

Our Wok will help you prepare the most creative recipes. Use it to make your favourite stir-fries or Chinese rice with seafood and seasonal vegetables

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Versatile handles: They are removable to allow the pots to fit in the dishwasher for easy storage. Additionally, they are interchangeable to provide greater comfort when loading the pots. Withstands temperatures up to 400 ° F / 204 ° C.

Silicromatic Ring ™: The exclusive Royal Prestige® ring seals the steam in the pots, which promotes greater retention of nutrients in meals and better control of time when cooking without water or fat. This ring is available in different interchangeable colours, to combine with the decoration of your kitchen.

Silicromatic Ring ™: The exclusive Royal Prestige® ring seals the steam in the pots, which promotes greater retention of nutrients in meals and better control of time when cooking without water or fat. This ring is available in different interchangeable colours, to combine with the decoration of your kitchen.

Silicromatic Ring ™: The exclusive Royal Prestige® ring seals the steam in the pots, which promotes greater retention of nutrients in meals and better control of time when cooking without water or fat. This ring is available in different interchangeable colours, to combine with the decoration of your kitchen.

Silicromatic Ring ™: The exclusive Royal Prestige® ring seals the steam in the pots, which promotes greater retention of nutrients in meals and better control of time when cooking without water or fat. This ring is available in different interchangeable colours, to combine with the decoration of your kitchen.

Silicromatic Ring ™: The exclusive Royal Prestige® ring seals the steam in the pots, which promotes greater retention of nutrients in meals and better control of time when cooking without water or fat. This ring is available in different interchangeable colours, to combine with the decoration of your kitchen.

Silicromatic Ring ™: The exclusive Royal Prestige® ring seals the steam in the pots, which promotes greater retention of nutrients in meals and better control of time when cooking without water or fat. This ring is available in different interchangeable colours, to combine with the decoration of your kitchen.

Durable and high quality: Due to its high-quality stainless-steel construction, you can cook in it for long periods of time, saving you money on replacements.

Safe moulded-over silicone handles: The heat resistant handles allow you to safely and comfortably move the pot full of hot food from one place to another.

Fast and efficient cooking: Always retaining a delicious flavour, the heat is evenly distributed throughout the pot for a faster cooking time saving you hours in the kitchen.

Durable and high quality: Due to its high-quality stainless-steel construction, you can cook in it for long periods of time, saving you money on replacements.

Safe moulded-over silicone handles: The heat resistant handles allow you to safely and comfortably move the pot full of hot food from one place to another.

Fast and efficient cooking: Always retaining a delicious flavour, the heat is evenly distributed throughout the pot for a faster cooking time saving you hours in the kitchen.

The present invention in general relates to the microwave compatible cooking system to be used as home appliance for cooking foods and it more specifically relates to pressure cooking system to be used inside a microwave oven for cooking food containing steam at a pressure above the ambient pressure. The microwave pressure cooker described in this invention can be used to cook foods safely in various situations for domestic pressure cooking. This is a complete self contained system that can be used with any microwave oven provided with a chamber large enough to accommodate it and more specifically which has a safety lock means to manage safely pre-operation, during operation and post operation condition of the cooker. BACKGROUND OF THE INVENTION

Microwave ovens use microwave energy to heat or cook food in a fraction of the time needed to cook with conventional ovens. Unlike conventional ovens, a microwave oven heats food without applying the external heat i.e. any flame or direct heat sources. The microwaves readily pass through many materials, such as glass, most plastics, paper and china clay, with little or no effect. Generally, these materials are used for making utensils which can be used for cooking in a microwave oven.

Nowadays the use of number of microwave oven in public has grown at very high rate. There has been an increase in demand for specially designed and configured cooking vessels for use in microwave ovens to provide easy and convenient way of preparing foods in microwave ovens. Many attempts have been made in the manufacture of various types of cooking vessels, casserole dishes, various types of bowls, pressure cookers for microwave and the like, to be compatible with use in microwave ovens. PRIOR ART

U.S. Pat. No. 4,796,776 discloses a pressure cooker for use in microwave ovens includes a microwave permeable bowl-shaped container, a microwave permeable dome cover, and a steel locking ring permanently attached to the cover for maintaining the container and cover in fluid-tight seal during use. A safety-valve, formed of flexible tubing, encounters a projection of the container and is deformed into a closed configuration responsive to movement of the cover, relative to the container, toward a locking position. A pressure regulator valve, consisting of a metal core surrounded by an elastically deformable casing, which is positioned over a pressure control opening in the cover to maintain a selected operating pressure level in the pressure cooker.

U.S. Pat. No. 4,853,509 discloses a rice cooker for preparation of shaped foods of rice in a microwave range is made of microwave permeable synthetic resin such as polypropylene and internally provided with mutually separate confined spaces of a fixed capacity and adapted for accommodating rice with water. As the rice cooker containing uncooked rice with water is heated in the microwave range, compression acts on the boiled rice due to pressure contact of the boiled rice swelled and water with walls defining the spaces and the boiled water is automatically shaped in the spaces. Absence of direct contact of the rice with user"s hand during the process enables preparation of shaped foods of rice such as rice balls without any keen pain and blemish on the hands.

U.S. Pat. No. 5,229,563 discloses a pressure cooker and a process for making the same, wherein the pressure cooker includes a pressure container for accommodating food to be cooked, a cover for covering the container in an air-tight manner, a pressure control device for adjusting the internal pressure in the container. The container or the cover or both are partly or wholly made of a composite resin consisting essentially of polyphenylene sulfide resin and 30 wt. % to 50 wt. % glass fiber.

U.S. Pat. No. 5,310,981 discloses a microwave cooker capable of cooking an assortment of foods by a variety of methods while maintaining constant pressure.

This pressure cooker boils and steams foods continuously without pressure build up and without the need to shut off the microwave oven. Food spattering and spillage are prevented by a unique internal baffle rib design and a mechanism that releaseably locks the top cover. The top cover and inner cover of the pressure cooker have the same outer diameter and each have a plurality of vent holes or apertures. Both the top cover and inner cover are positioned within container and each have a skirted edge. The skirted edges form an enclosure within the container member, specifically designed to obstruct and contain escaping food particles.

Application no. 46/CHE/2010 of the applicant itself provides a unique pressure microwave cooker but with a lock means which is different from the existing invention. DISADVANTAGES OF RELATED ART

In many of the prior art, the pressure cookers comprising container and cover that have been constructed to allow operation of cooker i.e. attempting to cook without built in features for confirming to the user himself that the closing the cooker cover over the body of the cooker is proper and complete. Similarly in the prior art, the pressure cookers do not provide for built in features on the cooker for confirming to the user himself the suitability of or attempting to open when there is a pressure buildup inside etc. Further many attempts have been made in prior art to achieve an efficient pressure cooking system, but still all suffer from drawbacks of not achieving a very safe operating system, as the focus is generally on the efficiency in cooking or on fuel saving or on cooking time.

Further most of the cookers do not give attention to the issue of actually controlling the opening and closing of such cookers in a very reliably and very safe manner. OBJECT OF THE INVENTION

The primary object of the present invention is to provide a most reliable and safer lock system pressure cooker, comprising of sub-assemblies, all of which are designed to be compatible with corresponding energy and provided with all required safety features for cooking taking into account many typical mistakes that may be made by an user during using the cooker.

Further, the object of the invention is to provide pressure cooker mounted with safety locking devices prescribed in appropriate standards and having a fool proof locking means, thus eliminating the mistakes that may be made by an user during using the cooker.

It is another object of the invention to provide a lock means for the cooker which shall prevent erroneous closing and/or opening of the cooker thereby ensuring safe operation condition at all times.

It is another object of the invention to provide a simple, attractive and light weight pressure cooker in which all parts and subassemblies may be made up of materials that is compatible with microwave oven including the referred lock means.

It is another object of the invention to provide a simple, attractive and light weight pressure cooker in which all parts and subassemblies may be made up of either above referred lock or metal that is compatible with the corresponding used oven including the referred lock means. Both plastic and metal can be used for metal cookers.

It is another object of the invention to provide a pressure cooker with an improved pressure responsive locking device made of elastomeric material or of any suitable metallic material. It is attempted herein to provide a pressure cooker with an improved composite visual pressure indicating cum lock device made of corresponding material including the use of elastomeric material or metal or combination thereof for indicating the pressure that is developed inside the cooker. Yet another feature in the present invention is that it is provided with a specially designed visual pressure indicator cum lock means which is essentially capable of ensuring that when the cooker is under pressure the cover removal is not operable by user and further also ensures proper closure of the cooker prior to commencing the pressure buildup inside the cooker and additionally performs as a visual pressure indicator.

It is further object of the invention to provide an effective, easy and composite means of releasing the pressure quickly, if so desired by the user by pushing down the visual pressure indicator.

This cooking system more specifically the lock means may be absolutely metal free and made of filled or unfilled polypropylene, delrin, polycarbonate or any polymer compatible with microwave energy at a working temperature of 100 -125° C. including the lock device.

However use of metal is also possible as long as the material meets the working condition demanded by the cooking system. The material so used does not restrict the performance of the lock means. SUMMARY OF THE INVENTION

According to the present invention, the pressure cooker may be a conventional pressure cooker or a microwave pressure cooker. If it is microwave pressure cooker then it needs to be made-up of microwave compatible material like polypropylene with the use of silicone for sealing and safety devices and otherwise, the same or a metallic lock means may be designed.

In this present invention, the pressure cooker works on the principle of normal pressure cooking like in a conventional cooker used on a gas stove, induction, microwave oven etc. so that the cooking time is less compared to time taken by any non pressure cooking.

According to the present invention, the pressure cooker has specially designed lock device. This may be made with metal or microwave compatible materials as detailed above. BRIEF DESCRIPTION OF DRAWINGS

The Multifunction Safety Lock (MFSL) in FIG. 2 shows the position of locking lever when the cooker is under pressure. Under pressure the visual pressure indicator (rod) is extended above the top surface of the safety lock cover. The lock position of the lock means in the extended state will not allow the cooker to be opened until the visual pressure indicator drops.

The Multifunction Safety Lock in FIG. 1 shows the position of lock means, when the cooker is not under pressure. The visual pressure indicator (rod) is down and the lock position of the lock means in the retract state allows the cooker to be opened.

Safety lock cover means cover in the multifunction safety lock, which can be removed to clean. The cover needs to be replaced after cleaning. The cover needs to be in place when cooker is used for cooking. Cooking without the cover can scald the finger when the user attempts to press the visual pressure indicator (the rod) to release the pressure.

The invention in one aspect discloses a Multifunction Safety lock means which is a pressure indicator cum lock for a pressure cooker. The Multifunction Safety lock means is a pressure response type body. It has a pressure monitoring means comprising of a moving rod between a first state and second state. A silicone sealing washer is mounted on the rod. The rod along with this washer combinedly is mounted freely across a hole formed on the cover of the cooker with the washer positioned underneath the cover. This rod and washer move upward under increasing pressure to lift the rod from the first state and the washer towards the underside of the cover thereby pushing sealingly the circular washer until positioned against the underside of the cover to seal the said hole and simultaneously the rod also extending upwardly above the top surface of the cover to reach the second state of the rod.

Further the rod moves downward under decreasing pressure to drop from the second state and the washer moves downward away from the underside of the cover thereby unsealingly away from the underside of the cover to unseal the said hole on the cover and the rod dropping downwardly until rod head seated against the top surface of the cover to reset into the first state of the rod. The first state of the rod is indicative of zero internal pressure. The second state of the rod is indicative of operating internal pressure of the cooker. It also has a locking means of push rod type operably associated with the pressure monitoring means comprising of first end connected to the top end of the rod and the second end terminating near the peripheral edge of the cover and passing through a hole formed on the peripheral edge of the cover. It is arranged such that the second end of lock means is responsive and representative of the state of the rod with two positions which are extended state and retract state of the lock means corresponding to second state and first state of the rod of pressure monitoring means. Like in any conventional cooker a plurality of locking lugs on the base container associated with matching locking lugs on the cover but has one set of matching locking lugs of the container adapted to engage with the said locking means on the cover.

The said arrangement is characterized in ordinarily securely locking the cover with the container when the said specific set of matching locking lug of the container is engaged with the said locking means and the internal pressure builds up a predetermined value and the locking rod is in extended state thereby becoming visible above the cover. Further it can ordinarily securely unlock the cover from the container when the internal pressure is released entirely and the locking rod is in retract state. It also ordinarily prevents pressure buildup if the said specific set of matching locking lug of the container is not engaged with the said locking means on the cover under partially closed condition the push rod of locking means is positioned against the lug of the container and is therefore prevented from engaging properly and hence prevents further pressure buildup. Further intentional manual downward push motion of the rod of the lock means will allow rapid release of the buildup pressure, which feature is desired very often by user.

In another aspect the invention relates to a pressure cooker with a Multifunction Safety lock means for securely locking the container with the cover prior to cooking and the said lock means which acts as a pressure indicator cum lock means with pressure response type body as described above.

The disclosure is with reference to drawings and illustrations but the scope of the invention covers all the modifications and variations known to the skilled person in the art.