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:
Jan. 16, 2018
Filed:
Aug. 29, 2014
Caterpillar Inc., Peoria, IL (US);
Carl McIlheran, Channahon, IL (US);
Andrew J. Kleitsch, Shorewood, IL (US);
John C. Vacca, Joilet, IL (US);
Daniel Mather, Lockport, IL (US);
Michael D. Hudson, Mount Zion, IL (US);
Derek W. Holmes, Tuscola, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A relief valve in a hydraulic system in a machine selectively sends pressurized oil to both a brake cooling apparatus and a cylinder used to hoist a load. A relief valve lowers pressure spikes in a brake cooling line by dumping fluid in a brake cooling line to tank responsive to a pressure spikes at the head end of the cylinder during hoisting or other transitions in the hydraulic system. Reducing the pressure spikes in the brake cooling line improves reliability of the brake cooling apparatus by protecting seals from undue stresses.