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:
Dec. 12, 1978
Filed:
Jul. 29, 1977
Richard L Hedgcock, East Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A steering clutch and brake power drive assembly wherein a clutch pack and a brake pack formed of a plurality of facially engageable plates are respectively retained between a retaining plate and a housing portion of the assembly by a plurality of bolts which, in the assembled arrangement, provide a preselected stress in biasing springs acting on the clutch plates and brake plates, respectively. A novel arrangement of bolts is provided wherein different size bolts are utilized for facilitating the assembly and disassembly. A small number of the bolts is made to be sufficiently large so that the assembly may be maintained by a single one thereof notwithstanding a high biasing force generated by the spring in the assembled arrangement. An improved lubrication oil transfer structure is further provided to the plate stack from a pressurized oil supply defined by a lubricating oil cavity adjacent the plate stack. Relatively movable wall portions defining the cavity are effectively sealed to cause substantially all of the oil delivery to the plate stack to be through the transfer passages.