Patent Publication Number: US-2021170697-A1

Title: Multi part plastic assembly that simplifies the application of primer solvents and plastic bonding cements and/or agents to plastic and/or pvc piping

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation-in-part of U.S. patent application Ser. No. 16/706,728, filed Dec. 7, 2019, entitled “MULTI PART PLASTIC ASSEMBLY THAT SIMPLIFIES THE APPLICATION OF PRIMER SOLVENTS AND PLASTIC BONDING CEMENTS AND/OR AGENTS TO PLASTIC AND/OR PVC PIPING” the teachings of which are incorporated herein in its entirety by reference. 
    
    
     FIELD OF INVENTION 
     The field of invention relates to devices that dispense primer solvent and plastic cement solutions onto and into plastic and/or PVC tubing in residential and commercial construction. 
     BACKGROUND 
     New construction of residences and commercial structures more and more are using plastic and PVC piping for both interior and exterior applications. Typical application of both primer solvents and plastic cement solution onto the interior of plastic and PVC union connections or connection sleeves, and onto the exterior surface of plastic and PVC pipes generally results in either too little or too much primer solvents and too little or too much plastic cement. 
     The result of over application of primer solvents to the interior surfaces of unions and angled joints can cause roughening of the portion of the union or joint allowing particle matter traveling through the finished piping a surface to catch onto resulting in bacteria and algae growth. The under application of primer solvents to the interior surfaces of unions and angled joints can result in a weak bond when a plastic or PVC pipe coated on the exterior portion of the pipe coated with plastic cement is inserted into the joint union. If the interior surface of the union is not properly prepared with a solvent primer, the plastic cement on the surface of the inserted plastic or PVC pipe may not properly bond with the interior surface of the union. This may result in a failed joint when the pipe assembly is put under pressure. 
     The result of over application of the plastic cement results in plastic cement buildup inside the end of the plastic or PVC pipe where it is inserted into the union. This buildup of plastic cement may result in microparticles of the cement breaking off the buildup and flowing away in the liquid stream passing through the pipe. If the liquid stream inside the pipe is water and is providing drinking water to people ingesting the water, the microparticles of the plastic pipe may be harmful to their health. Under application of plastic cement to the exterior of the plastic or PVC pipe the surface area of the bonding region between the pipe and the union is diminished. This may result in a failed joint when the pipe assembly is put under pressure. 
     Problem Statement 
     What is needed is some device or system to guarantee the application of primer and plastic cement to the exterior surface of the pipe and the interior surface of the union without over or under application of the primer or the cement thus facilitating a more perfect joining of the pipe and union. 
     SUMMARY 
     The instant invention discloses a number of devices and systems to alleviate most or all of the problems if installing plastic or PVC thin and heavy walled piping by simplifying the process of applying priming solutions and cements or other bonding solutions to making a joining of the pipes permanent. 
     EMBODIMENTS 
     Reference will now be made in detail to various embodiments, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. 
     A first exemplary embodiment is disclosed where a handheld applicator consists of a circular tube open at one end and containing a saturable foam disk with a circular hole in the center of the saturable foam disk. The diameter of said circular hole is equal to the outer diameter of a PVC pipe. The circular tube contains a reservoir disk that supports the saturable foam disk and an open space between the bottom of the reservoir disk and the bottom of the circular tube constituting a reservoir. A plurality of holes in the reservoir disk allows the pumped PVC primer/cement to flow into the saturable foam disk resting on the reservoir disk. A pump tube communicably connects the reservoir residing in the bottom of the handheld applicator and the manually activated pump. When the handheld applicator is depressed by a user, the action of depressing the handheld applicator activates the manually activated pump in the PVC primer/cement reservoir causing PVC primer/cement to be pumped through the pump tube to the reservoir in the bottom of the handheld applicator and through the plurality of holes in the reservoir disk to the saturable foam disk. 
     A related embodiment is disclosed where a handheld applicator consists of a circular tube open at one end and containing a circular saturable foam plug in the center of the handheld applicator. The diameter of said foam plug is equal to the inside diameter of a PVC pipe, union, joint, or connection sleeve. The circular tube contains a reservoir disk that supports the saturable foam plug and an open space between the bottom of the reservoir disk and the bottom of the circular tube constituting a reservoir. A plurality of holes in the reservoir disk allows the pumped PVC primer/cement to flow into the saturable foam plug resting on the reservoir disk. A pump tube communicably connects the reservoir residing in the bottom of the handheld applicator and the manually activated pump. When the handheld applicator is depressed by a user, the action of depressing the handheld applicator activates the manually activated pump in the PVC primer/cement reservoir causing PVC primer/cement to be pumped through the pump tube to the reservoir in the bottom of the handheld applicator and through the plurality of holes in the reservoir disk to the saturable foam plug. 
     Definitions 
     Handheld applicator: The purpose of the handheld applicator is to contain a circular foam disk which contains a circular hole in the center of the circular foam disk. The diameter of the circular hole is the same as the outer diameter of a PVC pipe that the handheld applicator will apply an even coating of PVC primer or PVC cement. 
     PVC Primer: The purpose of PVC primer is to begin the chemical reaction that softens PVC and to provide an even prepped surface for the solvent cement. 
     PVC Cement: PVC Cement is a solvent. PVC pipe connected to sleeves and unions through solvent welding. 
     PVC primer/cement reservoir container: is a closed container with a manually activated pump with a pump tube passing through the container to a handheld applicator. When the user presses downward on the handheld applicator the action is transferred to the manually activated pump through the pump tube initiating a pumping action pumping the PVC primer/cement through the pump tube to the handheld applicator. 
     Saturable foam disk: Is a circular foam disk which contains a circular hole in the center of the circular foam disk. The diameter of the circular hole is the same as the outer diameter of a PVC pipe that the handheld applicator will apply an even coating of PVC primer or PVC cement. 
     Saturable foam plug: Is a circular foam plug in the center of the handheld application applier. The circular foam plug diameter is the same as the inner diameter of a PVC pipe, union, joint, or connection sleeve. The PVC pipe, union, joint, or connection sleeve is fitted over the circular foam plug, and either the PVC pipe, union, joint, or connection sleeve or the handheld application applier containing the saturable foam plug is twisted and the PVC primer/cement is applied to the inner surface of the PVC pipe, union, joint, or connection sleeve. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a side view depiction of the invention 
         FIG. 2  is a top view depiction of a foam disk with a center cavity for applying PVC primer or PVC cement to the outside of a PVC pipe. 
         FIG. 3  is a top view depiction of a foam plug applying PVC primer or PVC cement to the inside of a PVC joint sleeve. 
         FIG. 4  is a side view depiction of a liquid pump prior art. 
         FIG. 5  is a side view depiction of a liquid pump inside a PVC primer or PVC cement can or similar reservoir. 
         FIG. 6 , is a side view depiction of the invention mounted on top of a PVC primer or PVC cement can with a liquid pump 
         FIG. 7 , is a side view of the invention with a liquid pump inserted into the invention and a top view of a foam disk with a center cavity 
         FIG. 8  is a side view of the invention with a liquid pump inserted into the invention and a top view of a foam plug for applying PVC primer or PVC cement to the inside of a PVC joint sleeve 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Objects and advantages of the present invention will become apparent to those skilled in the art upon reading this description in conjunction with the accompanying drawings, in which like reference numerals have been used to designate like or analogous elements. 
     Now referencing  FIG. 1  where  10  depicts and external view of the reservoir and pump assembly of the invention. In this depiction, reservoir body  12  holds a volume of primer or cement. Reservoir cap  14  is screwed onto a threaded fixture of reservoir body  12  (see  FIG. 5 ). Spring loaded assembly top  16  and spring loaded assembly bottom  18  contain a coil spring keeping the top and bottom portions of the assembly separated. Lift tube holder  20 , when pressed moves life tube  52  downward into pump mechanism  54  (see  FIGS. 4, 5, and 6 ). A check value (not shown) in the body of pump mechanism  54  allows lift tube  52  to partly fill with whatever fluid is in reservoir body. The action of compressing spring loaded assembly top compresses the spring and when the user releases pressure on lift tube holder  20 , life tube  52  raises releasing pressure on lift tube pump which closes the check value (not shown) in the body of pump mechanism  54  allowing pump mechanism  54  to refill with primer or cement. 
     Now referencing  FIG. 2  where  36  depicts a foam outside dimension applicator  32 . Foam outside dimension applicator  32  contains a hole into which a plastic pipe is inserted. Foam outside dimension applicator  32  will be saturated with primer or cement and a pipe inserted into hole  36  will have its outside surface coated with primer or cement from the saturated foam outside dimension applicator. Foam applicator  32  is contained within foam applicator  34 . 
     Now referencing  FIG. 3  where  40  depicts a foam inside dimension applicator  44 . When Foam ID applicator  44  is inserted into a plastic pipe, its inner wall be coated with primer or cement from the saturated foam ID applicator  44 . Foam ID applicator  44  is contained within foam applicator  34 . 
     Now referencing  FIG. 4  where  50  depicts the lift tube pump mechanism, and intake tube assembly consisting of lift tube  52 , pump mechanism  54 , and pump intake tube  56 . When lift tube  52  is pressed downward it moves into pump mechanism  54  (see  FIGS. 4, 5, and 6 ). A check value (not shown) in the outside dimension of pump mechanism  54  allows lift tube  52  to partly fill with fluid in its reservoir body  12 . When life tube  52  raises, pressure on lift tube pump mechanism  54  closes the check value (not shown) in the body of pump mechanism  54  allowing pump mechanism  54  to refill with primer or cement via pump mechanism intake tube  56 . 
     Now referencing  FIG. 5  where  60  depicts a cutaway view of reservoir body  12  with a threaded top  62  which secures reservoir cap  14  ( FIG. 6 ). Lift tube  52  is shown connected to pump mechanism  54  which is connected to pump mechanism intake tube  56 . The reciprocating action of lift tube  52 , pump mechanism  54 , and pump mechanism intake tube  56  is described above for  FIGS. 1 and 4 . 
     Now referencing  FIG. 6  where  70  depicts a side cut away view of the lift tube  52 , and pump mechanism  54  and pump mechanism intake tube  56 . In this depiction, reservoir body  12  holds a volume of primer or cement. Reservoir cap  14  is screwed onto a threaded fixture of reservoir body  12  (see  FIG. 5 ). Spring loaded assembly top  16  and spring loaded assembly bottom  18  contain a coil spring keeping the top and bottom portions of the assembly separated. Lift tube holder  20 , when pressed moves lift tube  52  downward into pump mechanism  54  (see  FIGS. 4, 5, and 6 ). A check value (not shown) in the body of pump mechanism  54  allows lift tube  52  to partly fill with PVC primer or PVC cement from reservoir body  12 . The action of compressing spring loaded assembly top compresses the spring and when the user releases pressure on lift tube holder  20 , lift tube  52  raises releasing pressure on lift tube pump which closes the check value (not shown) in the body of pump mechanism  54  allowing pump mechanism  54  to refill with primer or cement. 
     Now referencing  FIG. 7  where  80  depicts a view of the lift tube  52  and pump mechanism  54  and pump mechanism intake tube  56 . This assembly is shown connected to the assembly containing foam outside dimension applicator  32  and inside foam applicator housing  34 . As foam applicator housing  34  is repeatedly pressed downward and allowed to return upward, PVC primer or cement will be pumped via pumping mechanism  54  to reservoir  84  and into foam applicator housing  34  via holes  86  saturating foam outside dimension applicator  32 . 
     Now referencing  FIG. 8  where  90  depicts a view of the lift tube  52  and pump mechanism  54  and pump mechanism intake tube  56 . This assembly is shown connected to the assembly containing the foam inside diameter applicator  44  inside foam applicator housing  34 . As foam applicator housing  34  is repeatedly pressed downward and allowed to return upward, primer or cement will be pumped via pumping mechanism  54  to reservoir  84  and into foam applicator  34  via hole  86  saturating foam ID applicator  44 . 
     The inventor intends that only those claims which use the words “means for” are intended to be interpreted under 35 USC 112, sixth paragraph. Moreover, no limitations from the specification are intended to be read into any claims, unless those limitations are expressly included in the claims. 
     Where a specific numerical value is mentioned herein, it should be considered that the value may be increased or decreased by 20%, while still staying within the teachings of the present application, unless some different range is specifically mentioned. Where a specified logical sense is used, the opposite logical sense is also intended to be encompassed. 
     The previous description of the disclosed exemplary embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these exemplary embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.