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. 18, 1981
Filed:
Feb. 19, 1980
Harold L Reinsma, Dunlap, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
PCT No. PCT/WS80/00166 Sec. 371 Date Feb. 19, 1980 Sec. 102(e) Date Feb. 19, 1980 PCT Filed Feb. 19, 1980 A joint sealing structure (12) including an annular seal ring (23) having a sealing portion (28) provided with a sealing lip (31) having a dynamic seal engagement with a joint member sealing surface (18) at all times. The sealing portion is carried on a connecting portion (30) of the seal ring which, in turn, is provided with a base portion (29) mounted in the counterbore of the seal space (15). The stiffener (26) is connected by a connecting portion (27) to a base (25) press fitted in the counterbore surface (20). The base defines an inturned flange (35) providing a bearing for a Belleville spring (24). The Belleville spring is provided with a radial inner portion engaging projecting portions (33) of the stiffener for biasing the sealing portion (28) and lip (31) thereof axially toward the sealing surface (18). The diaphragm is a one-piece element including the stiffener, connecting and base portions and stiffener portion (26) is molded integrally into the sealing portion (28) of the seal ring. The stiffener may be provided with a plurality of distributed openings (38) for providing a positive mechanical bond of the molded sealing portion (28) to the stiffener (26). The Belleville spring may be arranged to pass over center in the range of axial movement between the joint members so as to provide an effectively flat spring rate and thereby provide a stabilized sealing force of the lip (31) against the sealing surface (18).