The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 1998
Filed:
Apr. 10, 1997
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A hydraulic actuator is provided with a housing with an oil compartment formed therein; a power output shaft rotatably supported on the housing and extending out from an interior of the oil compartment to an exterior of the housing; a vane radially extending out from the power output shaft and maintained in contact with an inner wall of the oil compartment, whereby the vane divides the oil compartment into a first oil compartment and a second oil compartment; a first hydraulic pressure passage communicating the first oil compartment and a hydraulic pressure source with each other; a second hydraulic pressure passage communicating the second oil compartment and the hydraulic pressure source with each other; and an oil control valve regulating at least one of a first hydraulic pressure to be supplied to the first oil compartment through the first hydraulic pressure passage and a second hydraulic pressure to be supplied to the second oil compartment through the second hydraulic pressure passage. The power output shaft is specified in its rotated position by the first and second hydraulic pressures acting on the vane. A variable valve driving mechanism making use of the hydraulic actuator is also disclosed.