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:
Jul. 29, 1997
Filed:
Apr. 18, 1996
Applicant:
Inventors:
Masao Ishida, Suwa, JP;
Yoshio Naruse, Okaya, JP;
Assignee:
Teikoku Piston Ring Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277136 ; 277138 ; 277137 ; 277163 ;
Abstract
A combined oil ring comprises an oil ring and a coil expander. A curved bar passes through paired end portions of the coil expander. An antirotation member comprises a portion to be inserted into a hole and a portion to be held. Two mutually parallel surfaces of the portion to be held are held between paired end surfaces of the coil expander while the portion to be inserted into a hole is inserted into an antirotation member securing hole formed at the bottom surface of an oil ring groove of a piston. The curved bar passes through a curved bar insertion hole formed in the portion of the antirotation member to be held.