Gate valve flexible wedge

Details Gate valve flexible wedge Gate valve flexible wedge

2005-11-01

2005-11-01

Bastianelli, John (Department: 3754)

Valves and valve actuation

Valve head movably connected for accommodation to seat

With yieldable connection

C251S327000

Reexamination Certificate

active

06959908

ABSTRACT:
A flexible wedge has a pair of pressure retaining plates and a central wedge body therebetween. The pressure retaining plates have inclined seating surfaces on opposed outer faces thereof for mating with corresponding valve seats within the valve body to prevent substance flow therethrough when the gate valve wedge is in the closed position. The central wedge body is disposed between, and integrally links, the pressure retaining plates. The central wedge body defines at least two offset slots which extend partially into the central wedge body from opposed edges thereof and which overlap in a depth-wise direction to define a deflectable web portion between the offset slots.

REFERENCES:
patent: 2948503 (1960-08-01), Williams
patent: 3815868 (1974-06-01), Bobo et al.
patent: 3837617 (1974-09-01), Eminger et al.
patent: 3993285 (1976-11-01), Conley
patent: 5657961 (1997-08-01), Kalsi et al.
patent: 5722636 (1998-03-01), Houston
patent: 6338469 (2002-01-01), Kalsi et al.
patent: 1 040 861 (1958-10-01), None

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