Patent ID: 7461828

Claim:
A check valve mounted in a channel of an outlet of a gas valve, comprising: a seat having a hollow body insertable into said channel, wherein the seat has an outer end defining a plurality of open, unobstructed slots; a valve body, separate from said seat, having at least a portion mounted radially within the seat, said valve body having a radially tapered inner end and an axially extending outer round edge; an outer packing contacting said seat and said valve body wherein the outer packing has a hollow cylindrical body with a packing inner end which protrudes inwardly to abut an outer end of said valve body and radially surrounding said round edge, and a packing outer end which is deformable so as to form a seal; a movable piston extending through said valve body wherein said movable piston defines a plurality of holes which allow gas to flow when said movable piston is pushed inwardly; a plurality of leg wings extending from a flange formed on an inner end of said movable piston which allow gas to flow when said movable piston is pushed inwardly; a spring contacting the inner end of said movable piston, urging said movable piston in an outward direction; and an inner packing mounted on said movable piston extending radially to an outer edge of said leg wings and contacting said valve body so as to prevent a flow of gas when said movable piston is not pushed inwardly; wherein the valve body outer end has a shoulder which abuts an inside surface of said seat.