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:
Apr. 09, 2002
Filed:
Mar. 30, 1999
Takao Nishioka, Itami, JP;
Takatoshi Takikawa, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
In a combination of the shim and cam for use in a reciprocating mechanism portion, the shim is made of a material having a hardness higher than that of the sliding surface of the cam and the sliding surface of the shim is finished to within a range of the surface roughness of R 0.07-0.2 &mgr;m in 10-point mean surface roughness and further the sliding surface of the cam is provided with open pores In the above combination, the generated torque and the wear of sliding portion are minimized by selecting a shim member whose surface roughness is difficult to deteriorate due to plastic deformation by a injection pump contact with a mating member and corrosion by various impurities mixed in lubricant and the like, and providing the surface of a cam member with an oil film holding function so as to maintain fluid lubrication of the sliding surface.