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.

Date of Patent:
Oct. 31, 2006

Filed:

Nov. 04, 2004
Applicants:

Tsuneo Endoh, Wako, JP;

Kengo Ishimitsu, Wako, JP;

Tsutomu Inoue, Wako, JP;

Naomi Warashina, Wako, JP;

Keisuke Takaoka, Wako, JP;

Inventors:

Tsuneo Endoh, Wako, JP;

Kengo Ishimitsu, Wako, JP;

Tsutomu Inoue, Wako, JP;

Naomi Warashina, Wako, JP;

Keisuke Takaoka, Wako, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 1/22 (2006.01); F02F 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A coupling structure for coupling a piston and a connecting rod has a protrusion formed on the rear surface of the crown of the piston and having a semi-spherical concavity and a threaded portion concentric to the concavity, a substantially spherical small end formed at one end of the connecting rod, a holder holding the spherical small end of the connecting rod slidably in the semi-spherical concavity of the protrusion and a fixing ring having a threaded portion engaging with the threaded portion of the protrusion for securing the holder to the protrusion of the piston.


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