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:
Jan. 13, 2015
Filed:
Mar. 04, 2011
Hidetaka Ogishi, Wako, JP;
Tetsuya Mizone, Wako, JP;
Kouhei Takemura, Settsu, JP;
Tomihiko Yanagiguchi, Settsu, JP;
Hidetaka Ogishi, Wako, JP;
Tetsuya Mizone, Wako, JP;
Kouhei Takemura, Settsu, JP;
Tomihiko Yanagiguchi, Settsu, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention provides a vehicle valve stem seal having both durability and sliding properties at an extremely high level in addition to usual sealing performance. The present invention is a vehicle valve stem seal comprising an elastic member with a seal lip portion on an end of a valve stem guide, the seal lip portion slidably closely contacting with a valve stem of an engine, wherein the elastic member is formed of a composition containing a fluororubber and a fluororesin and has projecting portions at least on a surface of the seal lip portion, the projecting portions being substantially formed of the fluororesin contained in the composition, the fluororesin is a copolymer including a polymerization unit derived from ethylene and a polymerization unit derived from tetrafluoroethylene, and the fluororubber is a polymer including a polymerization unit derived from vinylidene fluoride.