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. 01, 2026
Filed:
Feb. 03, 2023
Kawasaki Jukogyo Kabushiki Kaisha, Kobe, JP;
Shinji Nishida, Kobe, JP;
Isamu Yoshimura, Kobe, JP;
Daisuke Nakai, Kobe, JP;
Satoru Takao, Kobe, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe, JP;
Abstract
A hydraulic pump includes a casing; a cylinder block disposed in the casing so as to prevent rotation and including a plurality of cylinder bores that are open on one end surface of the cylinder block; a swash plate rotatably housed in the casing facing the one end surface; a plurality of pistons respectively inserted into the cylinder bores to reciprocate therewithin by rotation of the swash plate; and a variable capacity mechanism that changes an effective stroke length of at least one of the pistons. The mechanism includes a shaft portion inserted through the cylinder block that moves with the swash plate; and a swash plate portion provided on the shaft portion that is movable back and forth in an axial direction and prevents relative rotation of the swash plate portion. The shaft portion is pivotally supported at positions spaced apart in the axial direction in the cylinder block.