Patent Publication Number: US-2021172547-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:
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 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. 
     Definitions 
     Primer Solvent: The purpose of primer is to begin the chemical reaction that softens PVC and to provide an even prepped surface for the solvent cement. 
     Plastic Cement: PVC Cement is a solvent. The way to connect PVC pipe and unions is through solvent welding. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is an exploded view of the apparatus making up the invention. 
         FIG. 2  is a depiction of the interior components comprising the invention. 
         FIG. 3  is a cross sectional view of solvent/glue and foam containment object  18 . 
         FIG. 4  is a cross sectional view of solvent/glue and foam containment object  12 . 
     
    
    
     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. 
     In a first exemplary embodiment, an apparatus assembly and system are disclosed where PVC primer (solvent) or PVC glue is applied to the outer surface of the area of a PVC pipe that will be inserted into a union. The outer surface area of the PVC pipe to receive the PVC primer or PVC glue is limited to that portion of the outer end of the pipe that will be received into the union. 
     In a related embodiment the apparatus and system are alterable such that the application surface component of the invention may be changed such that the application surface may apply PVC primer (solvent) or PVC glue to the inner surface of a PCV union or to the outer surface of a PVC pipe. 
     In a second exemplary embodiment, a portion of the apparatus that dispenses PVC solvent or PVC glue is removable and replaceable to accommodate different inside diameters of unions and outside diameters of PVC pipe. 
     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 an exterior exploded view of the assembly comprising the invention. In this figure, foam insert  26  and  24  are contained within foam applicator housing  12  where foam inserts  26  and  24  receive PVC primer (solvent) or PVC glue from reservoir  14 . Foam insert  26  contains a hole in the center of the foam insert. The inside diameter of the hole in foam insert  26  is the same as the outside diameter of pipe  20  and the depth of the hole in foam insert  26  is the depth that pipe  20  is inserted into a union connection such as union  22 . When foam insert  26  is saturated with PVC primer (solvent) or PVC glue from reservoir  14 , pipe  20 , once inserted into the hole of foam insert  26 , be covered with a minimal amount of PVC primer (solvent) or PVC glue to the depth of the hole. 
     Reservoir  14  is comprised of a hollow pipe with one end fixed to foam applicator housing  12  and the other end comprises a threaded end supporting locking nut  29  which retains push rod  16  inside of reservoir  14 . 
     Once locking nut  29  is unscrewed from reservoir  14  by the user, pushing rod  16  and locking nut  29  can be removed exposing the interior of reservoir  14  allowing the user to fill reservoir  14  with PVC primer (solvent) or PVC glue or pour excess or unused PVC primer (solvent) or PVC glue back into a container. Once the user fills reservoir  14  with a sufficient amount of PVC primer (solvent) or PVC glue, pushing rod  16  is reinserted into the open end of reservoir  14  and locking nut  29  is screwed onto the threaded end of reservoir  14  thus sealing reservoir  14  and allowing the user to push pushing rod  16  into reservoir  14  forcing the PVC primer (solvent) or PVC glue unto foam inserts  26  and  24  residing in foam applicator housing  12 . 
     The pushing by the user on pushing rod  16  forces PVC primer (solvent) or PVC glue contained in reservoir  14  through a plurality of holes  40  (not shown) in  FIG. 1  and into foam inserts  26  and  24  saturating foam insert  26  and  24  with plastic glue or solvent. 
     Now referencing  FIG. 2  where  50  depicts cross sectional views of the interior components of the invention. In this depiction, pushing rod  14  is fastened to sealing component  28 . The outer diameter of sealing component  28  is the same dimension as the inter dimension of reservoir  14  less a clearance dimension which allows sealing component  28  to move up and down in reservoir  14  without binding. Sealing component  28  contains two “O” rings  32  which prevents PVC primer (solvent) or PVC glue from leaking out of reservoir  14  when the user applies pressure to reservoir  14  by pressing against the bottom of pushing rod  16 . 
     Porous foam applicator housing  12  contains porous foam insert  26  which applies PVC primer (solvent) or PVC glue to the outer surface of pipe  20 . Porous foam applicator housing  18  contains porous foam insert  24  which applies PVC primer (solvent) or PVC glue to the inner surface of joint union  22 . 
     Now referencing  FIG. 3  where  50  depicts a cut away view of porous foam applicator housing  18 . In this depiction, foam applicator  24  sits on PVC glue or solvent dispenser  40 . PVC glue or solvent dispenser  40  is a tube with a plurality of holes between the inner portion of the tube and the outer surface of the tube. As pressure is applied to reservoir  14  through pushing rod  14  and sealing component  28 , PVC primer (solvent) or PVC glue contained in reservoir  14 , will flow through the interior of receiving tube  34  and through the plurality of holes  40  to foam applicator  24  saturating foam applicator  24 . When one end of union  22  (not shown in  FIG. 3 ) is pressed down over foam applicator  24 , PVC primer (solvent) or PVC glue is applied to the inner surface of union  22  from foam applicator  24 . When porous foam applicator housing  12  is removed from reservoir  14 , a flexible cap (not shown) is placed over the end of receiving tube  34  to prevent the loss of PVC primer (solvent) or PVC glue from foam applicator housing  12  and a flexible plug (not shown) is inserted into the hole in the end of reservoir  14  to prevent the loss of PVC primer (solvent) or PVC glue from reservoir  14 . 
     Now referencing  FIG. 4  where  60  depicts a cut away view of porous foam applicator housing  12 . In this depiction, foam applicator  26  sits on PVC glue or solvent dispenser  36 . PVC glue or solvent dispenser  36  is a support plate with a plurality of holes between the cavity  28  and foam applicator  26 . As pressure is applied to reservoir  14  through pushing rod  16  and sealing component  28 , PVC primer (solvent) or PVC glue contained in reservoir  14 , will flow through the interior of receiving tube  34  into cavity  38 , through the plurality of holes  42  to foam applicator  26  saturating foam applicator  26 . When one end of pipe  20  (not shown in  FIG. 4 ) is pressed into the center hole in foam applicator  26 , PVC primer (solvent) or PVC glue is applied to the outer surface of pipe  20  from foam applicator  26 . When porous foam applicator housing  12  is removed from reservoir  14 , a flexible cap (not shown) is placed over the end of receiving tube  34  to prevent the loss of PVC primer (solvent) or PVC glue from foam applicator housing  12  and a flexible plug (not shown) is inserted into the hole in the end of reservoir  14  to prevent the loss of PVC primer (solvent) or PVC glue from reservoir  14 . 
     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.
         a. 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.