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:
Dec. 20, 2011
Filed:
Oct. 21, 2008
Tomoharu Murakami, Tokyo, JP;
Chikatoshi Abe, Tokyo, JP;
Tomoharu Murakami, Tokyo, JP;
Chikatoshi Abe, Tokyo, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
Abstract
A check seal () for discharging working oil scraped off a piston rod () by an oil lip () into an oil pool (A) of a hydraulic shock absorber to an oil reservoir (R) is disposed on the outside of the oil pool (A). The check seal () comprises an annular seat surface () and an annular lip () seated resiliently on the seat surface (). The annular seat surface () comprises an annular main rib () and an annular inner rib (), both of which project toward the annular lip (), such that an annular groove () is formed between the main rib () and the inner rib (). By providing a pressure introducing passage () to introduce a pressure inside the inner rib () to the annular groove (), the check seal () exhibits a high working oil discharging performance and a high working oil sealing performance.