Transmission assembly for use with double block and bleed system

Details Transmission assembly for use with double block and bleed system Transmission assembly for use with double block and bleed system

1988-09-19

1989-07-11

Chambers, A. Michael

Fluid handling

Systems

With flow control means for branched passages

1376371, F16K 1114

Patent

active

048462250

ABSTRACT:
A transmission assembly for operating a double block and bleed valve system having a first block valve with a first valve shaft, a second block valve with a second valve shaft and a bleed valve disposed between the first and second block valves, the transmission assembly comprising a cam assembly having a cam plate journaled for rotation about a fixed axis, a first link member interconnecting the cam assembly and the first shaft for effecting rotation of the first shaft in response to rotation of the cam plate, a second link member interconnecting the cam assembly and the second shaft for effecting rotation of the second shaft in response to rotation of the cam plate, said first link member being operative to effect initial rotation of the first shaft from a first position in response to rotation of said cam plate, said second link member being operative to effect initial rotation of said second shaft from a first position in response to further rotation of said cam plate after said initial rotation of said first shaft, said first and second link members being operative to rotate the first and second shafts, respectively, to a terminal second position in response to further rotation of the cam plate.

REFERENCES:
patent: 3007489 (1961-11-01), Biddle
patent: 3528447 (1970-09-01), Kolb
patent: 4385641 (1983-05-01), Albertin et al.

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