Airflow check valve
OwnerDavid E. Sisk, Peter J. Kemp +2inventors
InventorsDavid E. Sisk, Peter J. Kemp, Brent D. Kemp, Jason M. Huskey
Life of this patent
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Abstract
A check valve for use in an air flow line to convey pressurized air to unload a tank trailer, railroad car, or other conveying facility. It includes a housing, having a valve seat, a check valve for seating upon the valve seat, a bushing holding the valve stem for the check valve, with the bushing having a channel therein, through which the valve stem locates, and contains a spring therein that is totally encapsulated within the bushing chamber, during usage. The housing is internally contoured to enhance the flow of pressurized air therethrough.
Claims12
A check valve for use in an air flow line applying the flow of air to unload a tank trailer, railroad car, or other conveying facility, comprising:
- a housing, said housing incorporating a valve seat, a check valve provided within said housing and normally seated in closure against said valve seat, but when pressurized air flows through an air flow line unseating said check valve to allow air to flow through said line and pass said check valve;
- at least one mounting rib provided across said housing, a bushing supported upon said mounting ribs, said bushing having a channel provided therein;
- and
- a valve stem connected to said check valve, said valve stem provided for locating within said bushing channel, a spring provided upon said valve stem and functioning for biasing said check valve into closure, said spring entirely locating within the bushing channel whereby when said spring breaks due to fatigue, the broken spring parts remain sealed within the bushing channel and do not enter into or contaminate the flow of the passing air.
Dependencies are inferred from the claim text.