drywall mud pump invention made in china

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Fig. 1 is the perspective view of the continuous-flow pump system 10 for smearing dry wall joint compound.Pumping system 10 comprises wheelbarrow 12, pump module 14, accumulator 16, control panel 18 and manifold 20.Wheelbarrow 12 provides framework, for convenience of and flexibly for the purpose of, architecturally can the parts of installation system 10.Wheelbarrow 12 comprises platform bar 12A, handlebar 12B, framework 12C, wheel 22 and pin 24.Manifold 20 comprises control handle 26, power line 27, feed hose 28, Continuous Flow outlet 30, controlled flow outlet 32 and recirculation hose 34.Accumulator 16 comprises lid 36 and discharge neck 38.

Pump module 14 and accumulator 16 are mounted to platform bar 12A.Handlebar 12B is connected to platform bar 12A via framework 12C, and is wound around around pump module 14 and accumulator 16.Handlebar 12B to insert in framework 12C and is maintained in framework 12C via pin 24.Wheel 22 (only one of them being shown in FIG) is mounted to platform bar 12A, makes system 10 can be rolled into different positions everywhere.The operator of system 10 can adopt handlebar 12B to push away, draw or otherwise movement system 10.

Control panel 18 is mounted to pump module 14 and is connected to manifold 20 and pump module 14 by suitable being connected in electricity He on fluid.Power line 27 can insert power outlet to provide electric power to pump module 14 and control panel 18.Pump module 14 comprises the motor driving and be connected to the pump of accumulator 16 and manifold 20.Pump comprises the outlet of the import being connected to accumulator neck 38 and the import being connected to flexible pipe 28.Flexible pipe 28 is put in manifold 20.Joint compound is filled with into the pump in pump module 14 with funnel form by the discharge neck 38 of accumulator 16.Accumulator 16 comprises the access opening closed by lid 36.The operator of system 10 removes lid 36 to fill accumulator 16 with dry wall joint compound, prepares to use.

After the setting of the such as pump speed, system pressure, fill volume etc. in control panel 18 place adjust system 10 and so on, the control handle 26 of manifold 20 is adopted to adjust the output of pump.Manifold 20 comprises following setting: use controlled flow outlet 30 and flexible pipe 34 to start pump, make pump lead to external pressure, and the Continuous Flow on manifold 30 exports 34 place"s discharge joint compounds.In order to start pump, flexible pipe 34 inserts in accumulator 16 and (removes lid 26), and the control handle 26 of manifold 20 is positioned to discharge joint compound from outlet 32.Therefore, joint compound can be circulated to accumulator 16, until pump is fully compressed and starts from pump module 14 to returning.In order to distribute joint compound, instrument is connected to outlet 30, and control handle 26 is positioned in outlet 30 place discharge joint compound.After the operation of system 10 completes and remove joint compound from system 10, rotate control handle 26 and lead to external pressure to make pump, to adopt suitable clean measure.

Outlet 30 is designed to receive the annex with identical joiner, as instrument, flexible pipe, case, troweling device, taper etc.These annexes are constructed to the Continuous Flow receiving and use the joint compound provided in outlet 30 by pump module 14.Thus outlet 30 is used by Continuous Flow instrument specially.In the configuration illustrated, outlet 32 is exclusively used in recirculation hose 34.But not all dry wall instrument can both be compatible with the joint of outlet 30.Especially, be not configured to the instrument of the Continuous Flow receiving joint compound, namely there is the instrument of internal reservoir container, be usually provided with the joiner being constructed to the uniqueness being connected to special hand-held pump.The present invention"s design can be connected to manifold 20 to allow Continuous Flow instrument and discontinuous flow instrument to be connected to the fill port assembly of system 10 simultaneously.Especially, Continuous Flow instrument is connected to outlet 30, and fill port assembly is connected to the outlet 32 for discontinuous flow instrument.Fill port assembly comprises discharge nozzle, and this discharge nozzle has the quick connect adapter allowing different joiner to be connected to (comprising the connector for recirculation and start-up operation for connecting tube 34) outlet 32.

Fig. 2 is the close-up perspective view of the manifold 20 of continuous-flow pump system 10 for Fig. 1, and Continuous Flow outlet 30 and the controlled flow outlet 32 of manifold 20 are shown.Controlled flow outlet 32 is connected to fill port assembly 40, and fill port assembly 40 is connected to recirculation hose 34.Fill port assembly 40 comprises mounting plate 42, connecting plate 44, extension hose 46 and quick connect adapter 48.Connecting plate 44 comprises folding hook portion 50, straight assembly department 52 and pin 54.Pump module 14 comprises pump 56.The recirculation joiner 58 comprising dividing plate 60 and joint 62 is connected to fill port assembly 40.

Pump module 14, accumulator 16, control panel 18 and manifold 20 are mounted to wheelbarrow 12.By the discharge neck 38 of accumulator 16, dry wall joint compound is supplied to the import of pump 56.Joint compound is supplied to manifold 20 from the outlet of pump 56 by feed hose 28.According to the position of control handle 26, joint compound is supplied to outlet 30 or outlet 32 by manifold 20.Controlled flow outlet 32 comprises and is constructed to rotate as shown in the figure at control handle be connected to the joint of the joiner of the flexible pipe 46 of fill port assembly 40 to receiving during left hand position.Continuous Flow outlet 30 comprises the joint being constructed to rotate the joiner to the multiple types of tools receiving the Continuous Flow being designed to reception joint compound during right-hand lay at control handle.When rotating extremely to upper/lower positions, manifold 20 and pump 56 lead to external pressure.

Continuous Flow outlet 30 is provided for special outlet joint compound being provided to Continuous Flow instrument.Such as, in an embodiment of the present invention, be constructed to be connected to outlet 30 by the instrument of the AmesTapingToolsSystems company supply and marketing in Duluth city, the Georgia State.In another kind of embodiment, outlet 30 comprises poppet valve, and this poppet valve has the thread ring for receiving matching thread hose adapter.Controlled flow outlet 32 provides the outlet that can be connected directly to recirculation hose 34 as shown in Figure 1 or can be connected to fill port assembly 40 as shown in Figure 2.In one embodiment, outlet 32 comprises threaded pipe, coordinates the collar can be threaded on this threaded pipe.The quick connect adapter 48 of fill port assembly 40 allows multiple standalone tool, and as the U.S. Patent No. 4,086 at Ames, the taper described in 121, is connected to pump 56.In addition, quick connect adapter 48 can be used for connecting other annex by recirculation joiner 58, as recirculation hose 34.

Fig. 4 is the close-up perspective view of the fill port assembly 40 of Fig. 2, and this fill port assembly 40 is connected to the cam lever joiner 100 for dry wall joint compound dauber (not shown).Fig. 4 illustrates continuous-flow pump system 10, and it comprises similar elements as shown in Figure 2, and wherein recirculation joiner 58 is replaced by cam lever joiner 100.Cam lever joiner 100 comprises dividing plate 102, pipe 104, sleeve pipe 106, swan-neck tube 108 and controlling rod 110.Cam lever joiner 100 is commonly used to edge covering tool to be connected to fill port assembly 40.The cam lever joiner 100 comprising dividing plate 102 is the alternative joiners of the recirculation joiner 58 comprising dividing plate 60.Dividing plate 102 and dividing plate 60 are all constructed to allow different annexes to be connected to bleeder off hole 80.Each dividing plate is constructed to stud bolt 68A and 68B being connected to quick connect adapter 48.

Mounting plate 42 is fixed to pumping system 10 by connecting plate 44, as previously described.Mounting plate 42 comprises stud bolt 68A and 68B (Fig. 3), and nut 64A and 64B is tightened on stud bolt 68A and 68B dividing plate 102 and fill port assembly 40 to be linked together.Dividing plate 102 comprises the slit and hook joiner that are equivalent to dividing plate 60.But dividing plate 60 comprises pipe 104, this pipe 104 is around the opening of the opening 96 be similar in dividing plate 60.Sleeve pipe 106 is connected to pipe 104 so that swan-neck tube 108 is connected to system 10.As known in the art, valve assembly is positioned between sleeve pipe 106 and pipe 104, and this valve assembly activated when pipe 104 pushes in sleeve pipe 106 by controlling rod 110.

Cam lever joiner 100 of the present invention comprises the dividing plate 102 allowing pipe 104 to be connected to the quick connect adapter 48 of fill port assembly 40.Pipe 104 is aimed at the bleeder off hole 80 (Fig. 3) of mounting plate 42 by dividing plate 102, therefore the joint compound from flexible pipe 46 is introduced swan-neck tube 108.Swan-neck tube 108 comprises the connecting tube for filling edge covering tool, as known in the art.Dividing plate 102 is fixed in the mode identical with the dividing plate 60 of 3 with Fig. 2.Can adopt quick connect adapter 48 that the dividing plate of other type is connected to fill port assembly 40.

Fig. 5 is the close-up perspective view of the fill port assembly 40 of Fig. 2, and this fill port assembly 40 is connected to the applying nozzle joiner 112 for dry wall joint compound dauber (not shown).Applying nozzle joiner 112 comprises dividing plate 114, pipe 116 and pressure reed tongue 118.Mounting plate 42 is fixed to pumping system 10 by connecting plate 44, as previously described.Dividing plate 114 of the present invention comprises the plate in two holes of stud bolt 68A and 68B had for holding quick connect adapter 48 (Fig. 3).Thus, dividing plate 114 axially slides on stud bolt 68A and 68B.Dividing plate 114 is fixed to mounting plate 42 by nut 64A and 64B.Dividing plate 114 is connected to the pipe 116 receiving conventional pressure reed tongue 118.Pressure reed tongue 118 inserts in the case of smoothing tool, and corner case as known in the art or straight case, can fill this case by operating pumps system 10 joint compound before the use.

The invention provides a kind of fill port assembly, it makes to have different annex, and the joiner as instrument, recirculation hose, pressure reed tongue, swan-neck tube etc. can be connected to the manifold outlet of continuous-flow pump.Especially, fill port assembly comprises quick connect adapter, and this quick connect adapter allows the mounting plate of the nozzle dividing plate of different annex being connected to the fluid had for discharging such as dry wall joint compound and so on.In the embodiment disclosed, quick connect adapter comprises a pair stud bolt, and the pressure reed tongue with pair of holes or slit and hook structures can be connected to this to stud bolt.Fill port assembly comprises mounting plate, and this mounting plate has the discharge nozzle of the fluid of the manifold receiving self-pumping.Discharge nozzle can comprise the joint making flexible pipe more easily be connected to mounting plate.Mounting plate also comprises linkage mechanism, and as hook, it allows fill port assembly to be removably connected to continuous-flow pump.In one embodiment, linkage mechanism comprises the add-in card being connected to mounting plate, and it has the hole aimed at discharge nozzle.In other embodiments, linkage mechanism can be integral with mounting plate.Fill port assembly of the present invention can be retrofited to adapt to the manifold of existing continuous-flow pump system, or can be included in new continuous-flow pump system.Thus, fill port assembly, as illustrated in Figure 3 those fill port assemblies, can sell as the external member of separating with continuous-flow pump system.

Although describe the present invention with reference to preferred embodiment, those skilled in the art will recognize that, under condit without departing from the spirit and scope of the present invention, can change in form and details.

Green Builder:What progress has been made in the drywall mix over the past decade and is it any safer for workers. Could USG address some of the health concerns from this 1998 study, which says:

"A study by the National Institute for Occupational Safety and Health (NIOSH) has shown that "nuisance dust" from joint-compound mud used in drywall work can contain toxic materials. And, there can be dangerously high amounts of dust from sanding and other drywall work.

NIOSH conducted a Health Hazard Evaluation of dust and toxic exposures to 10 renovation workers at 2 sites doing drywall finishing. Measuring the air the workers were breathing, NIOSH found 9 of 10 total-dust samples at higher levels than limits set by the Occupational Safety and Health Administration (OSHA). More important, 2 of 13 samples of respirable (breathable) dust were above the limits OSHA says are safe. Two samples contained respirable silica. Silica can cause crippling and fatal lung diseases.

"The health effects associated with long-term chronic airborne exposure to the dust or particulates generated during drywall sanding are not known," the report said, adding that even when the dust amounts are within recommended limits, they may not be safe. This is especially true, the report said, when parts of the dusts are known to have a "biologic effect."

I’m writing to you in response to your February 10, 2016, article that features USG’s joint treatment products titled “How Green is Drywall Joint Compound? Looking Deeper into Materials and Health Risks.”We were disappointed that many of the important points that we shared with you on February 5, 2016, were not reflected in the article.

To appreciate all that has been done to mitigate health risks to drywall finishers, you need to look at not only our joint treatment products, but also at our wallboard on which the joint treatment is applied. Finishing wallboard joints takes time, and the labor cost for this task is far greater than the cost of the actual materials themselves. Drywall contractors don’t want to finish more joints than they have to, and for the joints that are necessary, they want to spend as little time as possible on finishing.

In other words, manufacturers, drywall contractors, health and safety professionals and the finishers themselves all share the same goal: to reduce time spent finishing joints, thereby reducing their exposure to any resulting dust from the finishing process. Over the decades, as a manufacturer of gypsum panels, we have helped achieve that goal:

I’d also like to point out that we have recommended the job practice of wet sanding joint‐treated areas for many years and we would be happy to send you some of our literature on the topic. While we know that wet sanding is not a universal practice among the drywall finishing trades that use our products, it has important advantages in terms of significantly reducing and/or eliminating respirable dust from the sanding operation. For this reason, we continue to recommend it as we have for many years. We provide the following product safety recommendations to our customers on all of our products:

Editor"s Note: We are not required to obtain rights when commenting on a photograph in the context of a news article. Since this was a journalistic article making a critical observation about the photo and its presentation, not a promotional piece, use of the photograph was within our legal rights. You are correct, however, that this is NOT a USG photo, nor is this a practice recommended or condoned by USG. In fact, that"s the point of the photo and caption, to show how not all contractors and third-party manufacturers represent drywall sanding safely.

Ripit Tools has developed a series of rubber plugs and adapters that will help you seal, store, and transport your automatic taping tools. This Drywall Mud Pump Boot fits easily over the bottom of the Pump, and prevents the mud inside from drying out. The Ripit Drywall Mud Pump Boot is great for breaks, cleaner transportation, and overnight storage. When using the Ripit Drywall Mud Pump Boot an idle pump will no longer need to placed in a bucket of water to avoid dry-out. The Boot creates a seal that keeps joint compound moist for extended periods of time.

"Chinese drywall" refers to an environmental health issue involving defective drywall manufactured in China, imported to the United States and used in residential construction between 2001 and 2009 – affecting "an estimated 100,000 homes in more than 20 states."

In samples of contaminated drywall, laboratory tests will detect off-gassing of volatile chemicals and sulfurous gases — including carbon disulfide, carbonyl sulfide, and hydrogen sulfide. The emissions worsen as temperature and humidity rise, will give off a sulfuric (rotten egg) odor and will cause copper surfaces to turn black and powdery, a chemical process indicative of a hydrogen sulfide reaction and an early indication of contaminated drywall. Copper pipes, electrical wiring, and air conditioner coils are affected, as well as silver jewelry.

Drywall, also known as plasterboard, is a building material typically consisting of gypsum-based plaster extruded between two thick sheets of paper and kiln-dried.

Drywall was imported by the United States during the construction boom between 2004 and 2007, spurred by a shortage of American-made drywall due to the rebuilding demand of nine hurricanes that hit Florida from 2004 to 2005, and widespread damage caused along the Gulf Coast by Hurricane Katrina in 2005.

An analysis covering drywall imports since January 2006 showed that more than 550 million pounds (250,000 t) of Chinese drywall was brought into the United States since then, enough to build 60,000 average-sized homes.

The green and red coloration in these copper components is an indicator that they were subject to typical corrosion, and not as a result of hydrogen sulfide emitted from contaminated imported drywall.

Homeowners alleging contaminated drywall have reported numerous incidents of corroding copper and other metals in their homes. The Florida Department of Health advised homeowners worried about tainted drywall to check copper tubing coils located in air conditioning and refrigeration units for signs of corrosion caused by hydrogen sulfide, as these are usually the first signs of the issue. Under normal circumstances, copper corrosion leaves it a blue/green or dark red color, whereas corrosion as a result of hydrogen sulfide exposure leaves a black ash-like corrosion. Homeowners who have verified that their home contains contaminated Chinese drywall are advised to replace any suspect drywall, as well as any potentially damaged copper electrical wiring, fire alarm systems, copper piping, and gas piping.

Dramatic increases in new home construction, coupled with the reconstruction effort after hurricane damage, led to a soaring increase in the quantity of imported Chinese drywall. Time magazine reported that more than 550 million pounds (250,000 t) of drywall was imported from China from 2006 to 2009, including much from the known principal manufacturer of the contaminated drywall, Knauf. However, domestic drywall manufacturing averages over 15 million short tons (30 billion pounds; 14 million tonnes) per year, leaving imported Chinese drywall with only a small portion of the market. It is estimated that this imported drywall has been used to construct approximately 60,000 homes.

From January to September 2006, 52 million pounds (24,000 t) of Knauf drywall were unloaded in New Orleans, three-quarters of it from Knauf Tianjin, and at least 37 million pounds (17,000 t) of Knauf drywall was shipped directly from China to Florida ports.

Drywall usually has a source printed on the back. Chinese drywall may be marked "Made in China", "China", "Knauf Tianjin", or have no marking at all. A home may have been built with drywall from several sources, American and imported.

In April 2009, home improvement stores The Home Depot and Lowe"s confirmed from their suppliers that no drywall sold in their stores was imported from China. Lowes did eventually settle lawsuits by offering up to $100,000 for each affected home but denied selling Chinese drywall.

On November 23, 2009, CBS News reported that they had done a drywall study to compare American and Chinese drywall. Random samples of new American-made drywall in six U.S. cities, new Chinese-made drywall from China, and samples of drywall from five damaged U.S. homes were collected and sent to the University of Florida to be tested by a team of researchers led by professor Tim Townsend, a scientist and leading expert on the effects of drywall on the environment. The report results stated:

In February 2009, U.S. Senator Bill Nelson of Florida sent a letter to the U.S. Consumer Product Safety Commission and the EPA, asking them to jointly investigate whether the Chinese drywall is toxic, and to determine the extent of potential damage to homes. The Consumer Product Safety Commission launched a formal investigation.

In April 2009, as concerns about the defective drywall grew, Senator Nelson of Florida and Senator Mary Landrieu of Louisiana jointly introduced a resolution and bill urging the Consumer Product Safety Commission to recall Chinese-made drywall and temporarily ban its import.

In May 2009, the U.S. House of Representatives passed an amendment to the Mortgage Reform and Anti-Predatory Lending Act (H.R. 1728) that would require the Department of Housing and Urban Development (HUD) to study the effects of tainted Chinese drywall on foreclosures and the availability of property insurance.Dodd–Frank Wall Street Reform and Consumer Protection Act (Subtitle H (Miscellaneous Provisions), Section 1494), signed into law on July 21, 2010.

In November 2009, the CPSC reported on an indoor air study conducted by the Center for Disease Control (CDC) comparing 41 "complaint" homes in five states with 10 control homes built around the same time. The report found a "strong association" between the imported drywall and levels of hydrogen sulfide gas and metal corrosion in the complaint homes.

Lab comparisons of Chinese- and American-made drywall show significantly higher levels of pyrite in the Chinese material. This suggests that pyrite oxidation may be the source of the sulfur compounds released by Chinese drywall.

The problems have been attributed to the use of fly ash in the drywall, which degrades in the presence of heat and moisture; although United States" drywall uses fly ash as well, the process used creates a cleaner final product.

According to a 2010 laboratory study, one hundred percent of affected drywall samples obtained from homes located in the southeastern United States tested positive for the presence of Acidithiobacillus ferrooxidans, an iron and sulfur reducing bacterium. Samples of non-contaminated drywall were found to contain only minuscule levels of A. ferrooxidans.

The Florida Attorney General"s office has warned of several deceptive practices targeted at homeowners, including bogus test kits, home inspection offers, ozone generators and chemical cleaners. The warnings point out that the presence of defective drywall cannot be determined by testing a home"s air, or corrected by chemical sprays or ozone generators.

Class action lawsuits claiming respiratory problems and headaches have been filed by Florida homeowners against home builders, drywall suppliers, and a Chinese drywall manufacturer.

Home supply retailer Lowe"s has denied claims that they have sold contaminated drywall imported from China. Numerous class action lawsuits were brought against the company, and as of October 28, 2010, Lowe"s has agreed to a settlement that may award victims up to $100,000 for damages caused by contaminated drywall purchased at their stores.

On September 30, 2010, the Internal Revenue Service announced it would provide tax relief for homeowners affected by property damage caused by imported Chinese drywall. The IRS has categorized the copper corrosion from the sulfur gasses emitted by the imported drywall as "casualty loss", and is in a similar category to property damage after a catastrophic event, such as a hurricane. However, homeowners can only claim a deduction after repairing the affected area(s), and much controversy has arisen because of the great out-of-pocket expense to affected homeowners.

"Imported Drywall and Health - A Guide for Healthcare Providers". Centers for Disease Control and Prevention. March 3, 2011. Retrieved March 24, 2013.

Department of Health, Division of Environmental Health, Environmental Health. "Copper Corrosion Case Definition Possibly Associated with Imported Drywall". Doh.state.fl.us. Archived from the original on March 1, 2012. Retrieved February 23, 2012.link)

Padgett, Tim (March 23, 2009). "Is Drywall the Next Chinese Import Scandal?". Time. Archived from the original on March 25, 2009. Retrieved April 20, 2013.

Ross, Allison (April 7, 2009). "Sens. Nelson, Landrieu call for recall, temporary ban on Chinese drywall imports". The Palm Beach Post, TCPalm. Retrieved March 25, 2013.

"Press Statement on Corrosion in Homes and Connections to Chinese Drywall" (PDF). November 23, 2009. Archived from the original (PDF) on January 8, 2013. Retrieved March 25, 2013.

"Imported Drywall: Exposures, Claims and Defenses in the United States" (PDF). Swiss Reinsurance America Corporation. December 2009. Archived from the original (PDF) on January 27, 2016. Retrieved March 24, 2013.

Tomei Torres FA (2018). "Case Study: Microbial Ecology and Forensics of Chinese Drywall-Elemental Sulfur Disproportionation as Primary Generator of Hydrogen Sulfide". Microb. Ecol. 76 (1): 1–12. doi:10.1007/s00248-017-1000-4. PMID 28639032. S2CID 189870903.

South Florida Business Journal (April 23, 2009). "AG warns of Chinese drywall scams". Bizjournals.com. Retrieved February 23, 2012. |author= has generic name (help)

"Chinese Drywall Update: Builders Burdened by Repair Costs". Coastal Contractor. Archived from the original on March 5, 2012. Retrieved February 23, 2012.