Gate valve with locking handles

Details Gate valve with locking handles Gate valve with locking handles

1989-06-26

1990-07-31

Kamen, Noah P.

Valves and valve actuation

With means for blocking or disabling actuator

Latch manipulator mounted on handle or stem

251100, 251327, 251366, F16K 3500

Patent

active

049444840

ABSTRACT:
A gate valve is provided which includes a body having exterior catches and a handle with resilient latches integrally formed with the valve stem to snap lock over the catches on the body when the valve is closed. The gate valve closes and locks simultaneously to cut off flow through a passage by a single axial motion and is unlocked to open the valve by rotational motion. Further, when the resilient latches snap over the catches, the operator hears an audible snap thereby assuring the operator that the valve is securely locked in the closed position. The gate valve body is preferably formed by ultrasonic welding of two identical half members.

REFERENCES:
patent: 2763459 (1956-09-01), Anderson
patent: 3316929 (1967-05-01), Milette
patent: 3350056 (1967-10-01), Blumenkranz
patent: 3443788 (1969-05-01), Grove
patent: 3588149 (1971-06-01), Demler
patent: 3603621 (1971-09-01), Parsons
patent: 3844531 (1974-10-01), Grengs
patent: 3940106 (1976-02-01), Hart et al.
patent: 3941349 (1976-03-01), Pierson
patent: 3955647 (1976-05-01), Tine et al.
patent: 4456026 (1984-06-01), Kantor

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