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:
Aug. 26, 1986
Filed:
Dec. 09, 1983
Daniel J Paisley, Dubuque, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A park brake mechanism includes a sealed housing enclosing a brake disc pack which is normally pressed together by a plurality of coil compression springs acting between an end of the housing and a pressure plate. Four hydraulic pistons are reciprocably mounted in the opposite end of the housing and connecting pins are received between the pistons and the pressure plate and serve to effect the release of the braking action between the disc pack discs when the pistons are pressurized. The pistons are in a rectangular pattern and diagonally opposite ones have threaded ports aligned therewith and adapted for receiving screws for stroking the pistons in the absence of pressure. A fluid pressure passage leading to the pistons contains a one-way orifice which operates to modulate the application of the brakes when pressure is relieved from the pistons.