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:
Aug. 28, 2001
Filed:
Oct. 23, 1998
Eagle Industry Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to a lip-type seal of the outer periphery rubber type having a stationary sealing portion made of rubber on the outer periphery of a reinforcing ring. In view of the fact that there is produced a gap corresponding to the rubber thickness of the stationary sealing portion between the outer periphery of the reinforcing ring and inner periphery of the seal attachment hole, the invention has an object to permit certain supporting of the reinforcing ring by means of a stop functional member by expanding the engagement area engaging with the stop functional member. More specifically, in the sealing apparatus of the invention, the engagement portion with the housing is sealed by a stationary sealing portion made of rubber attached to the outer periphery of the cylindrical portion of the reinforcing ring; the sliding portion with the shaft is sealed by sealing lips and supported by the reinforcing ring; and the reinforcing ring axially engages with the stop functional member such as a stop ring fixed to the inner periphery of the housing. In this sealing apparatus thus prevented from coming off, the reinforcing ring is provided with an engagement area expanding section which is arranged on the open-air side of the cylindrical portion, having a larger diameter than the cylindrical portion, arranged near the inner periphery of the housing, and expands the engagement area with the stop ring.