Charge and relief valve

Claim 1

A dual valve assembly for enabling ready access in relieving air pressure from a utilization device located on one side of a wall, and in furnishing air pressure to said utilization device from a source located on the opposite side of the wall, comprising (a) a unitary valve structure including a central body section and first and second integrally formed valves, each valve comprising (1) a hollow valve cylinder extending from said body section, and (2) a valve core, including a pin, within the bore defined by each valve cylinder; (b) a passageway through said central body section communicating with the respective bores in the valve cylinders such that said integrally formed valves constitute independently operable means for respectively charging and relieving air pressure in said valve assembly, said passageway intersecting at its one end substantially perpendicularly with the bores; and means at the other end of said passageway for connecting a hose thereto; (c) threads on the exterior surface of the first valve cylinder and a cap engaging said threads, said cap including a spring-biased plunger for contacting the pin of the valve core within said first valve cylinder so as to relieve the air pressure; (d) further threads on the exterior surface of the second valve cylinder, and a pair of fastening devices engaging said further threads for engaging respective opposite sides of said wall therebetween so that said valve assembly can be mounted on said wall such that the passageway in said central body section is located on said one side of the wall.