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:
Feb. 08, 1977
Filed:
May. 27, 1975
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A control system, for a rotating clutch having a rotating housing with a cavity adapted to axially slidably receive a clutch actuating piston therein and defining a clutch actuating chamber therebetween, includes a source of fluid, a control valve for infinitely variably supplying the fluid through a path in the housing to the actuating chamber so that the actuating piston is biased in a direction to engage the clutch, a plurality of passages in the housing disposed in fluid communication with the actuating chamber and the path, and including a fluid exhaust passage connecting therewith, and a differentially sensitive centrifugal valve slidably disposed in the passages for relieving fluid from the actuating chamber to the exhaust passage in response to centrifugal force and to fluid pressure in the actuating chamber, and in opposition to fluid pressure in the path in a differential area ratio responsive manner.