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:
May. 18, 1976
Filed:
Nov. 15, 1974
Curtis Farris Cummins, Decatur, IL (US);
Kenneth Wayne Kelly, Warrensburg, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A vehicle with at least front and rear sets of brakes includes a pair of brake control valves for normally communicating a source of pressurized fluid to individually control the brakes, a counterpart pair of inversion valves for normally supplying air piloting pressure to the brake control valves, and a retarding valve system communicating a source of pressurized air at one value to one inversion valve and at a proportionately lower pressure to the other inversion valve so that one set of brakes absorbs less energy than the other set of brakes in a retarding mode. The brake control system also includes a service brake valve actuatable to delivery equal pressure to both inversion valves for absorbing equal energy in both sets of brakes in an overriding manner with respect to the retarding valve system.