Low friction solenoid actuator and valve

Details Low friction solenoid actuator and valve Low friction solenoid actuator and valve

1992-09-25

1993-10-12

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335262, 335261, 25112915, H01F 308, H01F 300, H01F 708

Patent

active

052529398

ABSTRACT:
An actuator (24) for a valve (10) includes a housing tube (26) enclosing an internal cavity (48). A plunger (42) is mounted for movement in the internal cavity. The plunger includes four slots (50). Rollable spheres (58) are positioned in the slots between staked areas (62). A magnetic field created by electrical current passing through a coil (34) moves the plunger downward to open fluid flow through a control element (20). Flow through the control element enables controlled flow from an inlet (14) to an outlet (16) of the valve. The actuator construction provides for substantial elimination of sliding friction acting on the plunger, reduces hysteresis and the amount of power required to move the plunger, and facilitates accurate control of fluid flow rate through the control element.

REFERENCES:
patent: 1293052 (1919-02-01), Dinsmoor
patent: 2617050 (1952-11-01), Weinfurt
patent: 3788597 (1974-01-01), Ichioka
patent: 4127835 (1978-11-01), Knutson
patent: 4131866 (1978-12-01), Torr
patent: 4267897 (1981-05-01), Takeshima
patent: 4525695 (1985-06-01), Sheng et al.
patent: 5051635 (1991-09-01), Kasahara

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