Valves, and seismic sources incorporating the valves

Details Valves, and seismic sources incorporating the valves Valves, and seismic sources incorporating the valves

2005-03-22

2005-03-22

Hirsch, Paul J. (Department: 3753)

Valves and valve actuation

With correlated flow path

Valve operated by joining flow path sections

C251S205000

Reexamination Certificate

active

06869061

ABSTRACT:
A valve has an input (3,13) and first and second outputs (4, 5; 14, 15). The valve also has a closure member (2, 12) that is operable to isolate the first output from the input, to isolate the second output from the input, to isolate both outputs from the input, or to connect both outputs to the input.In one embodiment, the input (13) and the first and second outputs (14, 15) are disposed in a flat valve face (16) in a valve body. The closure member (12) has a sealing face (17′) that is biased against the valve face (16). A recess (18) is provided in the sealing end face (17′) of the closure member (12). The recess is so shaped, and the input (13) and outputs (14, 15) are so positioned that rotation of the closure member (12) by successive angles of 90° puts the valve in the following states: both outputs connected to the input, one of the outputs connected to the input, the other of the outputs connected to the input, and both outputs isolated from the input.The rotation of substantially 90° of the closure member12is achieved by releasing a bias on the closure member12, and allowing it to move axially. A worm groove (21, 22) provided on the surface of the closure member (12) derives rotary movement of the closure member (12) from its axial movement.

REFERENCES:
patent: 4257560 (1981-03-01), Diamond
patent: 5269347 (1993-12-01), Beasley
patent: 5615170 (1997-03-01), Chelminski
patent: 2623593 (1987-11-01), None
patent: 1069504 (1967-05-01), None

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