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. 10, 1979
Filed:
Mar. 09, 1977
Robert A Stinson, Aurora, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A hollow piston assembly for brakes or clutches comprises a first member having an annular plate portion, an inner cylindrical hub and a flange formed on the outer end of the plate portion. A second member defines an annular cavity therein and has an annular flange press-fit into a first recess defined at the juncture of the plate portion and the cylindrical hub of the first member and a radial flange press-fit into a second recess formed at juncture of the plate portion and the flange of the first member. The piston assembly may be reciprocally mounted in the housing of a brake package to selectively compress a plurality of interleaved friction discs upon pressurization of an annular actuating chamber, defined between the first member and the housing. A plurality of circumferentially disposed coil springs are mounted between the housing and the piston assembly to normally disengage the brake and to also hold the first and second members of the piston assembly in their press-fit relationship relative to each other.