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:
Feb. 24, 2004
Filed:
Sep. 10, 2002
Nils Terje Ottestad, Tønsberg, NO;
Ottestad Breathing Systems AS, Husoysund, NO;
Abstract
A pressure regulating valve for controlling an upstream fluid pressure in relation to a reference pressure by regulating the fluid quantity let through the valve, comprising a housing ( ) having an upstream inlet ( ) and a downstream outlet ( ) for the fluid, a pressure-sensitive element ( ) for sensing the pressure difference between the upstream pressure and the reference pressure, and a spring-loaded regulating piston ( ) which, in cooperation with a seat ( ), is arranged to regulate a flow passage ( ) between the inlet ( ) and the outlet ( ), the piston ( ) being operatively connected to the pressure-sensitive element ( ), to change its position relative to the seat ( ) in accordance with the position of the pressure-sensitive element ( ). The regulating piston ( ) is slidably arranged on the outside of a guide sleeve ( ) having openings ( ) for the flow of fluid from the flow passage ( ) to the outlet ( ). Further, the valve comprises a chamber ( ) defined between an end surface ( ) of the guide sleeve ( ) and an inner end surface ( ) of the piston ( ), and a pilot body ( ) which is mechanically coupled to the pressure-sensitive element ( ) and is arranged to open ducts ( ) for supply of fluid from the inlet ( ) to the chamber ( ) or delivery of fluid from the chamber ( ) to the outlet ( ) dependent on the position of the pilot body ( ) relative to the regulating piston ( ), so that the piston changes its position dependent on the chamber volume and thereby in accurate correspondence with the position of the pressure-sensitive element ( ).