Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1979-12-18
1981-09-01
Rosenthal, Arnold
Valves and valve actuation
Permanent or constantly energized magnet actuator
251129, 251139, F16K 3108
Patent
active
042867673
ABSTRACT:
The solenoid actuated valve device is comprised of a substantially cylindrical housing of magnetic material having a hollow tubular core of magnetic material disposed coaxially therein. The ends of the housing are sealingly closed by end walls of magnetic material and the housing is provided with a radially disposed inlet port and an axially disposed outlet port in communication with the central chamber of the tubular core. An annular bobbin having a solenoid coil thereon is slidably mounted on the tubular core for opening and closing the radially disposed openings through the core. A pair of springs extending between the end of the housing and the bobbin normally bias the bobbin into closing position relative to said openings with each spring being connected to one end of the coil and an electric terminal, respectively. At least two permanent magnets are mounted in the housing radially outwardly of the solenoid coils so that the lines of flux of the permanent magnets intersect the coil at right angles thereto. Axially extending passages are provided adjacent the permanent magnets to prevent the buildup of air pressure at opposite ends of the permanent magnets which might adversely affect the accurate control of the movements of the bobbin. The hollow core is divided into two chambers by a partition with one of the chambers being in communication with the outlet port and the other chamber being in communication with the air space in which the two springs are located.
REFERENCES:
patent: 2637343 (1953-05-01), Matthews
patent: 3001549 (1961-09-01), Nelson et al.
patent: 4193421 (1980-03-01), Sakakibara et al.
patent: 4216938 (1980-08-01), Inada et al.
Aisin Seiki Kabushiki Kaisha
Rosenthal Arnold
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