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. 21, 2011
Filed:
Sep. 03, 2008
Mitsuhiro Hanaoka, Nagano, JP;
Osamu Ueno, Nagano, JP;
Toshiaki Mitani, Nagano, JP;
Takayoshi Shinohara, Nagano, JP;
Mitsuhiro Hanaoka, Nagano, JP;
Osamu Ueno, Nagano, JP;
Toshiaki Mitani, Nagano, JP;
Takayoshi Shinohara, Nagano, JP;
Nissin Kogyo Co., Ltd., Nagano, JP;
Abstract
A cup sealincludes a base portion, an inner circumferential lipslidingly contactable with a plungerand an outer circumferential lipcontactable with the bottom surfaceof the seal groove. Further, on the cup seal, there are provided elastic projectionsprojecting from the outer circumferential side leading end of the inner circumferential liptoward the cylinder hole bottom portion. The length of the cup sealfrom the base end faceto the leading end portionsis set longer than axial length of the seal groove. When the cup sealis fitted into the seal groove, force is imparted on the inner circumferential liptoward the cylinder hole inner circumferential direction to energize the inner circumferential liptoward the piston all the time.