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. 21, 2026
Filed:
Aug. 06, 2024
Isuzu Motors Limited, Yokohama, JP;
Shoichi Takemoto, Fujisawa, JP;
Koji Terashima, Fujisawa, JP;
Yasushi Yamamoto, Fujisawa, JP;
Yusuke Kitamoto, Fujisawa, JP;
ISUZU MOTORS LIMITED, Yokohama, JP;
Abstract
A fluid working machine includes a cylinder that has a housing portion for accommodating a fluid, a piston that reciprocates in the cylinder, and a crankshaft that performs rotational motion in conjunction with reciprocating motion of the piston. The piston has an opposing concave portion provided in an opposing portion that faces a sliding surface of the crankshaft, and to which the fluid is supplied from the housing portion via the communication path. The opposing concave portion is provided in the opposing portion such that the center of gravity position of a force acting on the piston from the fluid in the opposing concave portion is located upstream of the crankshaft in the rotation direction when viewed from a central axis of the piston.