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:
Jul. 11, 1989
Filed:
Dec. 14, 1987
Akihito Okuda, Saitama, JP;
Yoshihiro Katagiri, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A hydraulically operated continuously variable transmission includes a hydraulic motor coupled to an output shaft, a hydraulic pump coupled to an input shaft, and a closed hydraulic circuit interconnecting the hydraulic motor and the hydraulic pump. The hydraulic motor has an annular array of slidable motor plungers disposed around an axis of rotation thereof and slidably disposed in respective cylinder holes defined in a motor cylinder, the motor cylinder having an annular array of communication ports disposed around the axis of rotation and communicating with the cylinder holes. The hydraulic motor also has a distribution ring supported on a fixed shaft and rotatable relative to and slidable against an end face of the motor cylinder, the distribution ring having a suction port for communicating with the communication ports corresponding to those motor plungers which are in an expansion stroke, and a discharge port for communicating with the communication ports corresponding to those motor plungers which are in a contraction stroke. The suction and discharge ports are arcuate in shape and extend substantially along the annular array of communication ports, the suction and discharge ports having outer peripheral edges having a radius greater than the radius of a circumscribed circle of the communication ports and inner peripheral edges having a radius smaller than the radius of an inscribed circle of the communication ports.