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. 12, 1980
Filed:
Feb. 08, 1979
Orville E Kessinger, Jr, Blue Grass, IA (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
An improved bearing seal (29) for use in a vehicle (10), such as a tractor, for preventing contamination of a pivot shaft bearing (23) or the like, which may be subjected to dirt, particulate matter, etc. The bearing seal (29) includes a lip seal (30), a labyrinth seal (32), and a dirt seal (33). The elements of the bearing seal are arranged in series relationship between one end (31) of the bearing and a shoulder (34) on the pivot shaft structure (21). The pivot shaft structure may define a swingable link (16) for mounting an idler (14) in the frame (15) of the vehicle trank (11). The labyrinth seal (32) may further define an abutment surface (35) for the dirt seal (33), and in the illustrated embodiment, defines a hardened washer having an inner diameter (39) slightly larger than the outer diameter of the pivot shaft (21) so as to define a sealing labyrinth therebetween. A guide boss (44 ) may be provided on the pivot shaft link portion (17) for cooperation with a frame portion (20) of the track mounting structure to prevent undesirable axial displacement of the pivot shaft (21).