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. 05, 2011
Filed:
Sep. 03, 2008
Hidenori Arai, Fukushima, JP;
Kazuki Takeno, Fukushima, JP;
Ichiro Yamane, Fukushima, JP;
Shinobu Munekata, Fukushima, JP;
Katsumi Yamashina, Fukushima, JP;
Masaru Watanabe, Fukushima, JP;
Hidenori Arai, Fukushima, JP;
Kazuki Takeno, Fukushima, JP;
Ichiro Yamane, Fukushima, JP;
Shinobu Munekata, Fukushima, JP;
Katsumi Yamashina, Fukushima, JP;
Masaru Watanabe, Fukushima, JP;
Nok Corporation, Tokyo, JP;
Abstract
A reciprocating seal used, for example, for a shock absorber. A main seal lip has a two-step lip structure including a first lip and a second lip and a plurality of protrusions extending in the direction of the shaft are formed on a sliding contact surface of the second lip, thereby improving frictional force characteristics and, at the same time, improving sealing performance.