Switch valve having a locking effect

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

2006-10-24

2006-10-24

Look, Edward K. (Department: 3751)

Valves and valve actuation

Limit stop

Rotary valve

C137S382500

Reexamination Certificate

active

07124999

ABSTRACT:
A switch valve includes a valve body, a control stem rotatably mounted on the valve body to open/close a water flow in the valve body, a limit ring mounted on the valve body to encompass the control stem, and a rotation head removably mounted on the limit ring and detachably engaged with the control stem for rotating the control stem. Thus, the distal end of the control stem 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: 3453655 (1969-07-01), Quinones et al.
patent: 3687414 (1972-08-01), Petty
patent: 4484595 (1984-11-01), Vanek et al.
patent: 6382590 (2002-05-01), Wu

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