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. 09, 2013
Filed:
Jan. 07, 2009
Thomas J. Heyden, Arlington Heights, IL (US);
Gregory P. Reitz, Silver Lake, WI (US);
Kurt J. Penney, Lexington, SC (US);
Thomas J. Heyden, Arlington Heights, IL (US);
Gregory P. Reitz, Silver Lake, WI (US);
Kurt J. Penney, Lexington, SC (US);
AAA Sales & Engineering, Inc., Oak Creek, WI (US);
Abstract
Systems and methods for retarding the speed of a railcar are provided. A supply of pressurized hydraulic fluid is provided to a piston cylinder to actuate the cylinder and thereby move a brake into a closed position in which the brake will apply a predetermined braking pressure to a wheel of the railcar. An accumulator accumulates fluid from the circuit when the wheel forces the brake out of the closed position and supplies accumulated fluid back to the circuit as the brake moves back into the closed position to thereby maintain a substantially constant braking pressure on the wheel as it moves through the retarder.