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. 26, 2002
Filed:
Jul. 27, 1999
Mitchell J. McGowan, Groveland, IL (US);
Clifford E. Miller, Marseilles, IL (US);
Dean J. Schlickbernd, Maple Grove, MN (US);
John A. Yeoman, Dunlap, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A method for controllably moving a machinery platform of a work machine having an electro-hydraulic system is disclosed. The work machine includes at least one swing motor configured to move the machinery platform . The changing speed of the swing motor is determined. A solenoid actuated valve is controlled in response to the determination. The solenoid actuated valve is configured to responsively produce a relief valve pilot signal . The two-way relief valve is controllably shifted in response to the inputted relief valve pilot signal . At least one of a high pressure by-pass valve and a low pressure by-pass valve is selected in response to the two-way relief valve shifting.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile