Switch valve having a locking effect

Details Switch valve having a locking effect Switch valve having a locking effect

2007-02-06

2007-02-06

Look, Edward K. (Department: 3751)

Valves and valve actuation

Limit stop

Rotary valve

C137S382500

Reexamination Certificate

active

11092441

ABSTRACT:
A switch valve includes a valve body, a control stem rotatably mounted on the valve body, a limit ring mounted on the valve body, a locking member secured on the control stem and hidden in the limit ring, and a rotation head removably mounted on the limit ring and detachably engaged with the locking member. Thus, the locking member is only rotated by rotation of the rotation head to rotate the control stem so as to open/close the water flow in the valve body, so that the switch valve has a locking effect, thereby preventing the switch valve from being opened by a person intentionally.

REFERENCES:
patent: 2009358 (1935-07-01), Fennema
patent: 2142368 (1939-01-01), Mueller
patent: 3453655 (1969-07-01), Quinones et al.
patent: 6409148 (2002-06-01), Dempsey et al.

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