Locking ball valve

Details Locking ball valve Locking ball valve

1978-10-12

1980-05-20

Schwadron, Martin P.

Valves and valve actuation

With means for blocking or disabling actuator

Released by non-valving actuator motion

251104, 251288, F16K 3500

Patent

active

042035724

ABSTRACT:
A locking type ball valve or a lock for a ball valve of the type having a handle movable through a right angle to open the valve in one position and close it in the other and a pair of stops on the housing of the valve to limit the movement of the handle to the right angle. A locking device is welded to the handle of the valve and has a shaft pivotable between two positions and a plate offset to one side of the shaft, the plate, in one position of the shaft, being opposed to one of said stops to lock the handle in either one of the open or closed positions and being removed from opposition with the stops in the other position of the shaft.

REFERENCES:
patent: 705419 (1902-07-01), Merrill
patent: 951878 (1910-03-01), Dolan
patent: 1139208 (1915-05-01), McMurray
patent: 1233406 (1917-07-01), Scholl et al.
patent: 1578109 (1926-03-01), Trudell
patent: 1740945 (1929-12-01), Kuehn et al.
patent: 1758727 (1930-05-01), Wildin
patent: 2223032 (1940-11-01), Farmer
patent: 3648970 (1972-03-01), Hartmann et al.

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