Fluid handling – Non-valving motion of the valve or valve seat – Rotary motion of a reciprocating valve
Patent
1976-05-14
1978-01-31
Pellinen, A. D.
Fluid handling
Non-valving motion of the valve or valve seat
Rotary motion of a reciprocating valve
1371163, 137495, 251 65, 251129, 335237, 335266, F16K 2900, F16K 3108
Patent
active
040710424
ABSTRACT:
Electromagnetic actuator, especially for actuating a hydraulic servo-control valve, which comprises a magnetic shell constituting a body of revolution and a concentric armature-forming permanent magnet, at least one annular field coil, the field coil and the armature being adapted to move axially in relation to each other. The movable member (field coil or armature) is caused to move by the resultant electromagnetic force resulting from the energization of the field coil to which a control direct current is applied and by the antagonistic force of a repulsion member incorporated in the magnetic shell. The field coil is longer than the armature so that the electromagnetic force is independent of the movement of the movable member and proportional to the control direct current. The movable member is caused to perform simultaneously a cyclic motion superposed to the axial movement in order to eliminate the friction hysteresis of the hydraulic valve.
REFERENCES:
patent: 2938151 (1960-05-01), Bowditch
patent: 3129347 (1964-04-01), Tognola
patent: 3172421 (1965-03-01), Rayfield
patent: 3202886 (1965-08-01), Kramer
patent: 3305209 (1967-02-01), Bender et al.
patent: 3670837 (1972-06-01), Olson
patent: 3746937 (1973-07-01), Koike
Bouvet Jean-Marie
Lombard Claude Edmond
Pellinen A. D.
Regie Nationale des Usines Renault
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