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:
Dec. 09, 1997
Filed:
Mar. 04, 1996
Applicant:
Inventor:
Donald R Roulet, West Linn, OR (US);
Assignee:
Maverick International, Inc., West Linn, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
137102 ; 1374844 ; 1375992 ;
Abstract
In a pneumatic pressure regulator comprising a ported housing having an internal bore, within the bore a spring-pressed piston mounted for reciprocation between advanced and retracted positions, and valve means associated with the piston and operative to direct the flow of air to the respective housing ports; the improvement comprising a housing the bore of which is inwardly tapered in the direction of spring-pressed piston retraction. This results in decreased friction, and improved hysteresis characteristics.