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. 22, 1990
Filed:
Sep. 29, 1989
Applicant:
Inventor:
Jim Helfenstein, Portland, OR (US);
Assignee:
Williams Controls, Inc., Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
1376256 ; 1376361 ;
Abstract
A proportional remote control having an air regulating controller and an air operated actuator that have matched components to provide a true linear control of the displacement of a valve spool in proportion to lever displacement on the controller. Minimal displacement of the hand lever applies an initial stepped output pressure to the actuator which moves the spool just short of fluid flow. The controller regulates the air pressure applied to the actuator from the initial stepped pressure to its maximum output in proportion to the displacement of its control lever.