Gate valve with magnetic closure for use with vacuum equipment

Details Gate valve with magnetic closure for use with vacuum equipment Gate valve with magnetic closure for use with vacuum equipment

1986-07-23

1988-05-31

Rosenthal, Arnold

Valves and valve actuation

With means to increase head and seat contact pressure

With positive reduction

251193, 251 65, F16K 316

Patent

active

047475773

ABSTRACT:
A gate valve, for use with evacuable equipment, includes a housing having a pair of aligned ports in opposed walls. A valve seat surrounds one of the ports. A gate member is reciprocally translatable by means of a linear actuator in a direction generally normal to the central axis of the valve seat. Magnetic structures are operably associated with the gate and valve seat for pulling the gate and seat into sealing engagement for closure of the gate valve by exerting a closure force generally parallel to the axis of the valve seat. The linear actuator includes a hollow cylinder having a piston movable therein and axially thereof which is magnetically coupled through the walls of the cylinder to an actuator member mechanically coupled to the gate for effecting reciprocal motion thereof.

REFERENCES:
patent: 2556225 (1951-06-01), Serge
patent: 2575906 (1951-11-01), Bullard
patent: 3641973 (1972-02-01), Shrader
patent: 3665958 (1972-05-01), Dunkelis
patent: 4056255 (1977-11-01), Lace
patent: 4238111 (1980-12-01), Norman
patent: 4403765 (1983-09-01), Fisher
patent: 4410008 (1983-10-01), Gottling et al.
patent: 4534539 (1985-08-01), Dettmann
patent: 4534714 (1985-08-01), Smith

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