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:
Jun. 22, 1982
Filed:
Jun. 04, 1980
Applicant:
Inventor:
Earl R Johnson, Tulsa, OK (US);
Assignee:
Loffland Brothers Company, Tulsa, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
192 / ; 188 723 ; 188 725 ;
Abstract
A clutch or brake utilizing the principles of a disc brake and comprising an annular disc rotatably secured between a pair of normally stationary annular flanges, a plurality of back-to-back caliper pistons secured in the disc and circumferentially spaced therearound, a fluid chamber interposed between each of the back-to-back pistons and in communication with a source of fluid for alternate extension of the pistons into simultaneous engagement with the pair of flanges and retraction of the pistons from engagement therewith to provide selective control of the rotation of the disc for either a braking or clutch operation.