Valves and valve actuation – With means for blocking or disabling actuator – Released by non-valving actuator motion
Patent
1976-10-26
1978-07-11
Schwadron, Martin P.
Valves and valve actuation
With means for blocking or disabling actuator
Released by non-valving actuator motion
213 76, 251 98, 251288, 251279, 251289, F16k 3500
Patent
active
040997022
ABSTRACT:
This invention relates to a pivoted double handle self-locking mechanism for operating a valve. Each of a pair of oppositely extending handles is pivotally mounted on a socket member secured to a key that rotates the valve, each handle being provided with a gear segment that meshes with a corresponding gear segment on the other handle whereby rocking of either handle about its pivot by a lever connected thereto effects rocking of the other handle so that a lug on one handle is moved to a position in which it will not engage a stop carried by the valve body upon subsequent arcuate movement of both handles while in their rocked position in response to a manual pull exerted on the lever connected to either one of the handles.
REFERENCES:
patent: 755918 (1904-03-01), Niederlander
patent: 839878 (1907-01-01), Niederlander
patent: 867718 (1907-10-01), Fravor
patent: 913287 (1909-02-01), Heiniger
patent: 1129340 (1915-02-01), Down
patent: 3662899 (1972-05-01), Randolph et al.
patent: 3812980 (1974-05-01), Kolb et al.
McIntire, Jr. R. W.
Poore W. F.
Schwadron Martin P.
Walton G. L.
Westinghouse Air Brake Company
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