High force solenoid and solenoid-driven actuator

Details High force solenoid and solenoid-driven actuator High force solenoid and solenoid-driven actuator

2005-08-16

2005-08-16

Look, Edward K. (Department: 3751)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C335S281000

Reexamination Certificate

active

06929242

ABSTRACT:
A solenoid having increased axial force and low static friction on the armature is disclosed and provides an improved solenoid-driven hydraulic valve actuator. The solenoid includes a coil member, a pole piece having an inside surface with recessed and non-recessed portions to form an inner recess in the pole piece, an armature inside the pole piece, and a bearing held in the recess between the pole piece and armature, the bearing having an inner surface extending inwardly just beyond the inside surface of the pole piece non-recessed portion.

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patent: 5261637 (1993-11-01), Curnow
patent: 5435519 (1995-07-01), Everingham
patent: 5467962 (1995-11-01), Bircann et al.
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patent: 5779220 (1998-07-01), Nehl et al.
patent: 6367766 (2002-04-01), Briant et al.
patent: 6374814 (2002-04-01), Cook et al.
patent: 6409144 (2002-06-01), Inami
patent: 6612544 (2003-09-01), Sakata et al.

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