logo

For the Inventor, By the Inventor

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.:

US 10309393 B1

PDFFull Text
Date of Patent:
Jun. 04, 2019

Filed:

Dec. 22, 2015

High-pressure pump and production method thereof

Applicant:

Denso Corporation, Kariya, Aichi-pref., JP;

Inventor:

Masaharu Nakaoka, Kariya, JP;

Assignee:

DENSO CORPORATION, Kariya, JP;

Attorney:

Nixon & Vanderhye P.C.

Primary Examiner:

F Daniel Lopez

Int. Cl.
CPC ...
F04B 53/22 (2006.01); F04B 53/16 (2006.01); F02M 59/26 (2006.01); F02M 59/44 (2006.01); F04B 53/14 (2006.01); F04B 1/04 (2006.01); F04B 1/053 (2006.01); F02M 59/48 (2006.01); F04B 7/00 (2006.01); F04B 11/00 (2006.01); B21D 31/04 (2006.01); B21D 39/04 (2006.01); F04B 19/22 (2006.01);
U.S. Cl.
CPC ...
F04B 53/16 (2013.01); F02M 59/26 (2013.01); F02M 59/44 (2013.01); F02M 59/445 (2013.01); F02M 59/48 (2013.01); F04B 1/0408 (2013.01); F04B 1/0413 (2013.01); F04B 1/0421 (2013.01); F04B 1/053 (2013.01); F04B 7/0076 (2013.01); F04B 11/00 (2013.01); F04B 53/14 (2013.01); F04B 53/162 (2013.01); B21D 31/04 (2013.01); B21D 39/04 (2013.01); F04B 19/22 (2013.01); F04B 53/22 (2013.01);
Abstract

A pump body of a high-pressure pump includes a pressure chamber formed in a deep portion of a cylinder. The pump body closes the pressure chamber on a side opposite to a plunger. The plunger reciprocates within the cylinder to vary a volume of the pressure chamber. The large-diameter portion provided at an end of the plunger on a side protruding to the pressure chamber has an outside diameter larger than an inside diameter of the cylinder and smaller than an inside diameter of the pressure chamber. In this case, the large-diameter portion is engaged with a step portion between the cylinder and the pressure chamber in a state before attachment of the high-pressure pump to an internal combustion engine. Accordingly, separation of the plunger from the cylinder is avoidable.

Find Patent Forward Citations

Loading…