Check valves with hinge shafts retained by welding

Details Check valves with hinge shafts retained by welding Check valves with hinge shafts retained by welding

2011-06-07

2011-06-07

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S527000, C137S015180

Reexamination Certificate

active

07954509

ABSTRACT:
Methods and apparatus are provided for retaining a hinge shaft of a check valve with a bushing. The check valve includes a valve body defining a flow passage therethrough; a hinge shaft; a bushing coupled to the valve body and welded to the hinge shaft; and a closure element pivotally mounted on the hinge shaft for opening and closing the flow passage.

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