Valve unit for controlling the delivery of a fuel gas

Details Valve unit for controlling the delivery of a fuel gas Valve unit for controlling the delivery of a fuel gas

2006-03-07

2006-03-07

Walczak, David J. (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

C251S069000, C251S071000, C251S129090

Reexamination Certificate

active

07007923

ABSTRACT:
A valve unit for controlling the delivery of a fuel gas through a delivery duct (3) comprises a valve seat (6) in the duct, a closure member (5) associated with the seat, a motor-driven actuator (7) acting on the closure member in order to control it so as to open/close the valve seat, as well as an electromagnetic unit (22) with a first portion (23) carrying a magnetizing winding (24) and a second portion (25) which can be fixed firmly to the first position by magnetization. The electromagnetic unit (22) is associated with the actuator in order to act on the closure member (5) so as to close the valve seat (6), irrespective of the operative position of the actuator (7), upon the occurrence of a predetermined condition which requires the valve seat to be shut off, and the actuator means (7) is movable, together with the second portion (25) of the electromagnetic unit (5) so as to open/close the valve seat, the first portion (23) of the electromagnetic unit being connected to a stationary structure of the valve unit.

REFERENCES:
patent: 2268960 (1942-01-01), Ray
patent: 2873069 (1959-02-01), Matthews
patent: 2875773 (1959-03-01), Matthews
patent: 6572076 (2003-06-01), Appleford et al.
patent: 0 035 154 (1981-09-01), None
patent: 1 106 923 (2001-06-01), None

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