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:
Apr. 21, 1981
Filed:
Mar. 16, 1979
James R Shuler, Eureka, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A track chain construction (10) wherein a pair of link chains (11 and 12) are maintained in spaced parallel relationship by shoes (13) secured to the respective links (16,17) of the link chains. The shoes define central lugs (18) for engagement by the drive sprocket in operating the track chain. Each link (16,17) defines an integral unitary structure including a socket portion (23) and a pin portion (24). The pin defines a reservoir (27) for containing lubricating oil for lubricating the pivot joint defined by the pin (24) received in the socket bore (23). A crescent seal (36) defines a moving seal for cooperation with a fixed seal (30,31) between an end cap (29) and the socket end (21) of the link for sealingly maintaining the oil against leakage from the pivot joint (20). A removable plug (28) permits recharging the oil reservoir (27) when desired. The seal (36) includes an improved wear member (42) adhesively bonded to the pin (24) and defining the surface against which one leg (41) of the seal movably engages. Structure (33,34) is provided for limiting the axial movement of the pin (24) relative to the socket (23).