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:
Jun. 11, 2024
Filed:
May. 19, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
The present invention provides a fuel pump capable of suppressing sticking of a plunger. The fuel pump of the present invention includes a plungerthat reciprocates, a cylinderin which a guide holethat guides the reciprocating motion of the plungerextends in the axial direction, and a pump bodythat holds the cylinder. The pump bodyincludes a cylinder insertion holeinto which the cylinderis inserted, and a pressurizing chamberthat communicates with the cylinder insertion holeand has a volume increased or decreased by the reciprocating motion of the plunger. The cylinderincludes a press-fitting portionpress-fitted into the inner peripheral surface of the cylinder insertion hole, and a grooveformed at a position corresponding to the press-fitting portionon the inner peripheral surface of the guide hole