Patent ID: 7171977

Claim:
A pressure relief and topping valve for use in exhausting over-pressure in an inflatable device as well as topping off or inflating the inflatable device, the valve comprising: (a) a valve body having a fluid passage therein with an internal shoulder; (b) a first poppet having a recessed seat with a poppet aperture extending therein extending though the first poppet, the first poppet further including a plurality of outward stops extending front the poppet; (c) a first spring retainer for holding the first poppet within the fluid passage; (d) a first spring positioned between the first poppet and the first spring retainer for biasing the first poppet against the internal shoulder, the first spring being independent; (e) a seal having a seal aperture therein aligned with and having a greater internal diameter than the poppet aperture when the seal is seated within the recessed seat and selectively against the internal shoulder, the seal comprising an axially directed seating surface for sealable seating against the internal shoulder when the first poppet is biased against the internal shoulder, and a radially inwardly directed sealing shoulder for sealable seating against a second poppet when the second poppet is biased into the seal aperture by a second spring; (f) the second poppet having a stem extending to a head with a neck therebetween; (g) a second spring retainer for holding the second poppet within the fluid passage; and (h) the second spring being positioned between the first poppet and the second spring retainer for biasing the second poppet against the seal, the second spring operating independently from the first spring.