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US 5,813,316 AGranted
Rotary hydraulic actuator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMutsuo Sekiya, Katsuyuki Fukuhara, Masafumi Sugawara
Life of this patent
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Abstract
In a rotary hydraulic actuator wherein a hermetic casing has the inside divided into a first hydraulic chamber and a second hydraulic chamber by a vane slidably rotatable on an inner curved wall of the casing, the vane is rotatable by an oil pressure supplied to the respective chambers, and the movement of the vane is taken out from an output shaft, the inner wall of the casing which is in sliding contact with the vane is formed with a polytetrafluoroethylene sliding member.
Claims7
A rotary hydraulic actuator comprising:
- a hermetic casing having an inner curved wall formed therein;
- a rotary member housed in said casing;
- an output shaft integrally formed with said rotary member;
- a vane slidably rotatable on said inner curved wall and dividing the inside of said casing into a first hydraulic chamber and a second hydraulic chamber, wherein said vane has a flat shape and has one end coupled with an outer peripheral portion of said rotary member;
- said first and second hydraulic chambers having a hydraulic working fluid supplied therein to cause rotation of said vane and thereby transfer torque to said output shaft;
- and
- a sliding member made of fluoroelastomer or polytetrafluoroethylene resin and coated on a slidable contacting portion of said inner curved wall by baking.
4 more elements
Dependencies are inferred from the claim text.