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:
Aug. 31, 1993
Filed:
Feb. 13, 1992
Fujiya Maruno, Tokyo, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A radial-plunger-type hydraulic pump or motor includes a W-mechanism comprising a first internal gear relatively rotatably mounted on a main shaft, an external gear rotatably mounted on a supplementary shaft and held in mesh with the first internal gear, and a second internal gear rotatably mounted on an auxiliary shaft and held in mesh with the external gear. The first and second internal gears have the same number of gear teeth, and the supplementary shaft and the auxiliary shaft can revolve around the main shaft. When the auxiliary shaft revolves around the main shaft while the first internal gear is being held against rotation, the second internal gear does not rotate about its own axis, but revolves with the auxiliary shaft around the main shaft. The plungers of the radial-plunger-type pump or motor are allowed to reciprocally move in identical strokes, and no thrust load is applied between the plungers and the cylinders in which the plungers reciprocally move. The W-mechanism, which comprise gears, can operate at high speed with high efficiency, and are of relatively small axial dimensions.