Valves and valve actuation – With means for blocking or disabling actuator – Released by non-valving actuator motion
Patent
1990-06-11
1991-08-13
Walton, George L.
Valves and valve actuation
With means for blocking or disabling actuator
Released by non-valving actuator motion
70175, 70218, 137385, 251102, 251110, 251292, F16K 3500
Patent
active
050390627
ABSTRACT:
A tamper-proof valve which includes a valve body fitted with a transverse bore, an entry port and outlet port communicating with the transverse bore and an inner body seat for receiving a tapered inner body having a notch adapted for manipulation in alignment with the entry port and outlet port in open configuration and transverse to the entry port and outlet port, in closed configuration. A plug is provided on the top of the inner body for seating one end of a spring which is slidably encased in a collet. A square key is also slidably disposed in one end of the collet and is adapted to seat in a key seat provided in a top valve assembly which mounts on the valve body. An allen screw having a tamper-proof tool receptacle is threaded in the top valve assembly in alignment with the key, such that a special tool may be inserted in the allen screw tool receptacle and the allen screw rotated in the clockwise direction (when viewing the valve body from the top) to seat against the key, compress the spring inside the collet, remove the key from the key seat located in the top valve assembly and facilitate rotation of the top valve assembly independently of the inner body. Rotation of the allen screw in the opposite, or counterclockwise direction allows the spring to force the key upwardly into the key seat and facilitate opening and closing the inner body and the valve body in concert.
REFERENCES:
patent: 981630 (1911-01-01), Franks
patent: 992502 (1911-05-01), Hollis
patent: 1040327 (1912-10-01), Hollis
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patent: 1162935 (1915-12-01), Lange
patent: 2602351 (1952-07-01), Ringler et al.
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patent: 2944784 (1960-07-01), Jaros
patent: 3796074 (1974-03-01), Vik
patent: 3802459 (1974-04-01), Geraudie
patent: 4848112 (1989-07-01), Graber et al.
Davis Robert E.
England Frank R.
Harrison John M.
Walton George L.
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