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. 15, 1980
Filed:
Aug. 18, 1977
Applicant:
Inventor:
Azam S Qureshi, Racine, WI (US);
Assignee:
Tomco, Inc., Racine, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
13762561 ; 91378 ; 13762564 ;
Abstract
A power assist remotely controlled servo controller for proportionally controlling the operation of a directional control valve, the controller including a servo-controlled force amplifying piston assembly to operate the directional control valve and a pilot pressure balanced piston connected to the servo-controlled piston assembly to control the directional control valve. The balanced pilot pressure forces acting on the pressure balanced piston being controlled by either a hydraulic or electric controller from a remote location.