Valves and valve actuation – Electrically actuated valve – Rotary electric actuator
Patent
1995-03-17
1996-06-25
Nguyen, Hoang
Valves and valve actuation
Electrically actuated valve
Rotary electric actuator
25112911, 251250, F16K 3104, F16K 3154
Patent
active
055292828
ABSTRACT:
A valve actuating device of a heating and/or cooling system controls the opening and closing of a valve of the system. The device includes a housing having a fitting which is threadably received by a fitting receiving formation of the valve for securing the housing to the valve. The device further includes an electric motor mounted on the housing. The motor drives a shaft having a pinion gear mounted thereon, and, upon its activation, opens the valve. A rack has teeth engagable with the pinion gear of the electric motor and an end portion engagable with a valve stem of the valve. The arrangement is such that the rack is movable upon activation of the motor from a first position in which the end portion of the rack engages the valve stem for maintaining a valve member of the valve in a closed position, to a second position in which the rack is moved via the pinion gear of the motor away from the valve stem for opening the valve.
REFERENCES:
patent: 1788429 (1931-01-01), Groble
patent: 3703673 (1972-11-01), Balz
patent: 4629157 (1986-12-01), Tsuchiya et al.
patent: 4836497 (1989-06-01), Beeson
patent: 4845416 (1989-07-01), Scholl et al.
patent: 4951915 (1990-08-01), Piao
Nguyen Hoang
SPARCO Inc.
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