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:
May. 14, 2002
Filed:
Jul. 06, 2001
Applicant:
Inventors:
Roger A. Webel, Copley, OH (US);
Salvatore L. Zingales, Sr., Westlake, OH (US);
Assignee:
NPK Construction Equipment, Inc., Walton Hills, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02F 3/96 ;
U.S. Cl.
CPC ...
E02F 3/96 ;
Abstract
A control system and method of using a control system for a thumb on an excavator allows the thumb to follow a workpiece held in a bucket when the bucket moves. The thumb control circuit is activated by the press of a button and thereafter maintains a constant reduced close fluid pressure of the extend port of the thumb cylinder until the open control is actuated.