Combination inflation and relief valve

Abstract

A combination inflation and relief valve having an inflation gasket mounted on a reciprocating stem head that separates from a valve seat of a valve body against the force of an inflation spring upon inflation and having a relief gasket mounted on a reciprocating push disk that separates from the stem head against the force of a relief spring to allow excess internal pressure to vent through relief holes.

1 . A combination inflation and relief valve, comprising a valve body in which is operatively mounted a reciprocating stem and stem head, said stem head including an inflation gasket resiliently urged in sealing engagement with an inflation valve seat of the valve body, said stem head further including at least one relief hole that is sealed by a push disk, said push disk being reciprocatably coupled to the stem to urge said relief gasket in sealing engagement with said relief hole.  
   
   
       2 . A combination inflation valve and relief valve, comprising in combination: 
 an inflation valve including a generally cylindrical valve body having an internal annular inflation valve seat and an annular inflation spring seat, a reciprocating stem head positioned within said valve body for urging into sealing engagement with the inflation valve seat; and    a relief valve including a push disk having a central hole for sliding engagement along the length of said stem, said push disk being urged in sealing alignment with at least one relief hole formed through the stem head.    
   
   
       3 . The combination inflation and relief valve as set forth in  claim 2 , wherein said stem and said stem head are integrally formed.  
   
   
       4 . The combination inflation and relief valve as set forth in  claim 2 , further including an inflation gasket mounted to said stem head having an angular surface for sealing engagement with said annular inflation seat.  
   
   
       5 . The combination inflation and relief valve as set forth in  claim 4 , wherein said relief gasket comprises a cupped gasket that seals about said relief hole.  
   
   
       6 . The combination inflation and relief valve as set forth in  claim 5 , further including a relief gasket mounted to said relief disk having an O-ring gasket that seals against opposing annular edges of an annular slot formed in said stem head in fluid communication with said relief hole.  
   
   
       7 . The combination inflation and relief valve as set forth in  claim 6 , further including an inflation spring and a relief spring concentrically mounted in alignment about said stem by a lower guide and an upper guide of a poppet, respectively.  
   
   
       8 . The combination inflation and relief valve as set forth in  claim 7 , wherein a lower surface of said stem head comprises a boss for aligning said relief spring concentrically.  
   
   
       9 . The combination inflation and relief valve as set forth in  claim 8 , wherein said poppet comprises radial tabs defining said surfaces.  
   
   
       10 . The combination inflation and relief valve as set forth in  claim 9 , wherein said poppet is permanently affixed to an end of said stem.  
   
   
       11 . The combination inflation and relief valve as set forth in  claim 10 , wherein said stem head is manufactured without said relief hole and wherein said push disk, said relief spring and said relief gasket are omitted during assembly to form a simple inflation valve.