Expanding gate valve assembly

Details Expanding gate valve assembly Expanding gate valve assembly

1980-04-25

1982-07-27

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251196, F16K 2500

Patent

active

043413692

ABSTRACT:
A gate valve (10) has an expanding gate assembly (34) for reciprocal movement transversely of the flow passage (16, 18). The expanding gate assembly (34) includes a gate element (68) and complementary segment (70) which expand away from each other when the gate assembly (34) is in either a fully open or closed position. A spring (92) is anchored to a side (87) of the gate element (68) and extends over and engages a pair of spaced apart lugs (88, 90) on the adjacent side (91) of the segment (70). The lugs (88, 90) are positioned so that the movement of the gate element (68) relative to the segment (70) from the fully collapsed position results in the spring (92) exerting at least seventy percent of its total force on the lug (88 or 90) that is leading with respect to the direction of relative movement of the segment (70).

REFERENCES:
patent: 2954960 (1960-10-01), Dunbar
patent: 4189127 (1980-02-01), Constantino

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