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. 17, 1986
Filed:
Jan. 02, 1985
Applicant:
Inventors:
Genkichi Umeha, Tokyo, JP;
Shigeru Urano, Saitama, JP;
Osamu Hirakawa, Saitama, JP;
Shunsuke Takeguchi, Saitama, JP;
Assignee:
Nippon Piston Ring Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
419-8 ; 419-5 ; 419-6 ; 419 46 ; 419 54 ; 419 55 ; 74567 ;
Abstract
A composite camshaft having a plurality of ferrous fitting members, such as cam lobes and journals, firmly bonded to a steel shaft by sintering in the presence of a liquid phase. The fitting members are fabricated as a green compact from metal powders and pre-sintered to axially shrink the compact by one-half a preselected allowance of shrinkage. Thereafter the pre-sintered fitting members are fitted on the shaft and sintered to axially shrink the compact by the remaining allowance of shrinkage and metallurgically join the shaft.