Proportional pressure-regulator valve

Details Proportional pressure-regulator valve Proportional pressure-regulator valve

2005-01-04

2005-01-04

Hirsch, Paul J. (Department: 3754)

Valves and valve actuation

Electrically actuated valve

Having means to produce proportional flow

C251S129070

Reexamination Certificate

active

06837477

ABSTRACT:
A proportional pressure-regulator valve comprising a load-dependent control step and a method for the load-dependent regulation of a pressure level of a pressure medium with one proportional pressure-regulator valve. The load-dependent control step is obtained with a proportional magnet (1) having at least two gaps (10, 12) for regulating the magnetic force. The size of the gaps (10, 12) can be adjusted independently of each other. While a first gap (!2) is current-dependent regulated, the size of the second gap (10) can be regulated via a pressure force adaptable in proportion to a load requirement in the hydraulic circuit.

REFERENCES:
patent: 5337785 (1994-08-01), Romer
patent: 5443309 (1995-08-01), Beck
patent: 6005462 (1999-12-01), Myers
patent: 6120003 (2000-09-01), Lubischer et al.
patent: 199 01 679 (1999-08-01), None
patent: 100 03 896 (2001-08-01), None
patent: 101 17 608 (2002-05-01), None
patent: 0 875 702 (1998-11-01), None
patent: 0 752 152 (2000-05-01), None

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