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:
Mar. 31, 1998
Filed:
Mar. 18, 1996
Louis A Ollivier, Palo Alto, CA (US);
Veriflo Corporation, Richmond, CA (US);
Abstract
A fluid pressure regulator and a method of regulating involve configuring a valve and valve seat of the regulator such that as the valve is moved relative to the valve seat from a closed or nearly closed position of a throttled fluid passage in the regulator to a full flow position, the throttled fluid passage is opened at a rate in relation to the movement of the valve relative to the valve seat which increases during travel of the valve. In one disclosed form of the fluid pressure regulator, a first portion of the outer surface of the valve which contacts the valve seat when the valve closes the throttled fluid passage is tapered with respect to a direction of movement of the valve relative to the valve seat. A second portion of the outer surface of the valve arranged on a valve seat side of the first portion is oriented substantially more steeply with respect to the direction of movement of the valve relative to the valve seat than the tapered first portion for changing the rate of opening of the fluid passage in relation to the movement of the valve during movement of the valve relative to the valve seat. The regulator enables relatively high flow through the regulator, up to 500 to 1000 l/min or more, with a relatively small change in outlet pressure over the range of flow from no or low flow to high flow.