Valves and valve actuation – With means for blocking or disabling actuator – Released by non-valving actuator motion
Patent
1992-06-02
1993-02-23
Walton, George L.
Valves and valve actuation
With means for blocking or disabling actuator
Released by non-valving actuator motion
70177, 70180, 70212, 137315, 137385, 137550, 251104, 251110, 251288, 251315, F16K 3506
Patent
active
051883350
ABSTRACT:
A ball valve comprising a body including a valve chamber having inlet and outlet ports, and a rotatable ball element disposed within the valve chamber, the ball element having a conduit therethrough which communicates with the inlet and outlet ports. The ball element is movable by a control lever between an open position and a closed position. The valve is provided with a lockable security device which automatically locks the ball element in a positive closed position when the control lever moves the ball element from an open position to a closed position. The lockable security device includes a rotatable cylinder, a locking cylinder slidably mounted on the rotatable cylinder, a supplemental locking member to selectively allow manual locking of the locking cylinder in a position to prevent sliding movement of the locking cylinder on the rotatable cylinder.
REFERENCES:
patent: 664462 (1900-12-01), Campbell
patent: 917408 (1909-04-01), Booz
patent: 932188 (1909-08-01), Strelezky
patent: 983842 (1911-02-01), Schneible
patent: 1089098 (1914-03-01), Winkler
patent: 1801175 (1931-04-01), Possons
patent: 2678186 (1954-05-01), Blackford
patent: 4078763 (1978-03-01), Yamamoto
patent: 4848724 (1989-07-01), Pettinaroli
patent: 5058622 (1991-10-01), Chitty, Jr. et al.
Fratelli Pettinaroli S.p.A.
Mentag Robert G.
Walton George L.
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