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:
Apr. 11, 2000
Filed:
Jan. 06, 1998
Eiji Takeyama, Nagoya, JP;
Aichi Kikai Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
For an automatic hydraulic pressure generator in which a hydraulic master cylinder driven by a computer-controlled motor lets in or takes out a friction clutch, an operation device is provided that can make the piston rod of the hydraulic master cylinder operate at high torque and at high speed and further that is advantageous in durability of its conversion mechanism from rotary motion to linear motion. The operation device for operating a hydraulic master cylinder by motor drive comprises a slider driven by a motor to rotate around a stationary shaft through an actuator gear train for speed reduction; a female screw formed on an inner circumference of the slider; a male screw provided on an outer circumference of the stationary shaft and meshing with the female screw; a sleeve fixed to a piston rod of the hydraulic master cylinder and being slidable along the stationary shaft in the axial direction; and a slider bearing for coupling the sleeve with the slider so that the sleeve may be rotatable relatively to and movable integrally with the slider in the axial direction.