Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1988-11-14
1990-09-25
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310330, 310332, 13762561, 25112901, 239585, H01L 4108
Patent
active
049595814
ABSTRACT:
A control motor for a servo valve is provided. The control motor comprises a control element which can carry out a pivotal movement due to an electric input signal supplied to said motor. The movement of the control element causes a corresponding change of hydraulic resistances and, as a consequence, changes in hydraulic output signals of an hydraulic amplifier actuated by said motor.
REFERENCES:
patent: 3050034 (1962-08-01), Benton
patent: 3107630 (1963-10-01), Johnson et al.
patent: 3461910 (1969-08-01), Selsam et al.
patent: 3501099 (1970-03-01), Benson
patent: 3524474 (1970-08-01), McCormick
patent: 4011474 (1977-03-01), O'Neill
patent: 4471256 (1984-09-01), Igashira
patent: 4567394 (1986-01-01), Frisch
patent: 4690465 (1987-09-01), Takeda et al.
patent: 4771204 (1988-09-01), Siegal
patent: 4814659 (1989-03-01), Sawada
Budd Mark O.
Mannesmann Rexroth GmbH
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