Patent ID: 6837477

Claim:
A proportional pressure-regulator valve for regulating a pressure level in a hydraulic circuit, comprising: a housing containing an armature rod ( 5 ) extending between a proportional magnet ( 1 ) in the housing and a control element situated in the hydraulic circuit; the proportional magnet ( 1 ) having a magnetic coil ( 4 ), a magnetic core and a magnetic armature ( 3 ) connected to the armature rod ( 5 ), and said magnetic coil ( 4 ) and at least a part of said magnetic core are firmly connected with said housing ( 11 ); a magnetic force existing within a first gap ( 12 ) between said magnetic armature ( 3 ) and said magnetic core for axially moving said magnetic armature ( 3 ) back and forth between a first and a second end positions within an interior space of said magnetic coil ( 4 ); said magnetic core partly projects into the interior space of said magnetic coil ( 4 ) and is concurrently concentrically situated about said armature rod ( 5 ) and the motion of said magnetic armature ( 3 ) relative to said first magnetic core results in an actuation of said control element, and wherein said proportional magnet ( 1 ) also has an adjustable second gap ( 10 ) for regulating the magnetic force axially moving said magnetic armature ( 3 ).