Solenoid valve device

Details Solenoid valve device Solenoid valve device

2005-12-20

2010-11-16

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Including solenoid

C251S129010, C335S258000

Reexamination Certificate

active

07832708

ABSTRACT:
A solenoid valve device, in particular a hydraulic valve device, has a solenoid element which is movable from a non-energized retracted state into an energized extended state, the working stroke of the solenoid element from its retracted state into its extended state including a constant magnetic force working stroke and an idle stroke in which the magnetic force is not constant, but decreases over the stroke.

REFERENCES:
patent: 4779582 (1988-10-01), Lequesne
patent: 6065734 (2000-05-01), Tackett et al.
patent: 6619615 (2003-09-01), Mayr et al.
patent: 6925975 (2005-08-01), Ozawa et al.
patent: 7227439 (2007-06-01), Kelly
patent: 199 04 901 (2000-08-01), None
patent: 100 44 486 (2001-04-01), None
patent: 102 08 899 (2003-09-01), None
patent: WO 02/43083 (2002-05-01), None

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