Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1989-02-02
1990-07-10
Walton, George L.
Valves and valve actuation
Permanent or constantly energized magnet actuator
251 635, 355306, F16K 3108, F16K 31122
Patent
active
049402072
ABSTRACT:
An automatic valve comprising a first cylindrical magnet as a part of a valve rod axially slidable in a valve chamber for opening and closing a valve port and a second cylindrical magnet as a part of a piston disposed around and coaxially with the first cylindrical magnet for magnetically actuating the valve member under pneumatic control, in which respective ring magnets constituting each of the first and the second cylindrical magnets are stacked such that identical magnetic poles are axially faced to each other increasing the magnetic attraction force and also such that respective ring magnets in the second magnet are slightly deviated from those in the first magnet in the direction of closing the valve port for resisting the external valve-opening force. The piston has a spring for normally closing the valve ports and a round-about air discharge channel formed therein for discharging air when actuated by pressurized air against the spring force for reducing the number of air hoses, etc. The valve member is disposed at the inside of the valve chamber with a fluid channel formed therebetween which can be utilized also as a passage for a cleaning solvent.
REFERENCES:
patent: 3212751 (1965-10-01), Hassa
patent: 3347262 (1967-10-01), Gibson
patent: 3355140 (1967-11-01), Andersen
patent: 3977436 (1976-08-01), Larner
patent: 4285495 (1981-08-01), King
patent: 4382578 (1983-05-01), Ruyak
Trinity Industrial Corporation
Walton George L.
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