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:
Jul. 04, 1989
Filed:
Feb. 13, 1987
Applicant:
Inventors:
Rolland D Scholl, Dunlap, IL (US);
Mike T Zimmer, Peoria, IL (US);
William E Allen, Peoria, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318600 ; 251 3001 ; 36416701 ;
Abstract
Apparatus is provided for mechanically actuating a valve stem in response to signals generated by an electronic control. A signal means and a sensor means send signals to the electronic control in response to a desired valve stem position and a sensed valve stem position, respectively. The electronic control formulates an error signal if the sensed position is not the desired position. A motor receives a control signal in response to the error signal and drives a linkage for moving the valve stem to the desired position.