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:
Mar. 30, 1993
Filed:
Mar. 24, 1992
Richard E Livesay, Peoria, IL (US);
Owen R Thompson, Louisville, KY (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A fluid control system for a track press has first and second main fluid work circuits and a plurality of auxiliary fluid work circuits. The first and second work circuits are substantially similar and each has a pair of dual acting slave cylinders and one single acting master cylinder. The cylinder rod of each master cylinder is connected to the cylinder rods of the respective slave cylinders through a reaction bar. Each of the first and second work circuits has a fluid reservoir and a high flow capacity control valve in direct communication with a respective fluid reservoir and a respective master cylinder. During fast forward and reverse of the slave cylinders, the piston and rod of each master cylinder is advanced or retracted due to the interconnection with the reaction bar. During fast forward, fluid is drawn from the reservoirs at a fast rate to rapidly fill the large slave cylinders. This provides extremely fast cycle times.