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. 30, 1981
Filed:
Jul. 16, 1979
Harold L Reinsma, Dunlap, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
PCT No. PCT/US79/00505 Sec. 371 Date July 16, 1979 Sec. 102(e) Date July 16, 1979 PCT Filed July 16, 1979 PCT Pub. No. WO81/00293 PCT Pub. Date Feb. 5, 1981 A sealing structure (10,110) for use in a joint (11) having a first member (12) axially movable relative to a second member (14). The first member defines a recess (13) receiving the sealing structure which includes an annular seal ring (19,119) having a radially outer annular base portion (20,120) fitted in the recess, a sealing portion (21,121) having a lip (22,122) engaging a surface (15) of the movable member (14) confronting the recess (13). The sealing portion is provided with a stiffener which is bonded or partially encapsulated therein and provided with axially inwardly projecting tongues (30,130) engaged by a spring structure (24,124). In the illustrated embodiment, the spring structure includes one or more Belleville springs (25,26,125) received within the base portion (20,120) of the seal ring and having outer portions (27,127) axially inwardly engaging a flange (32,132) inturned by the axially inner portion of the base. The Belleville springs are arranged to deflect past the flat disposition thereof in the range of movement between the joint members so as to provide an effectively minimum variation in the sealing force applied thereby.