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:
Nov. 30, 1976
Filed:
May. 08, 1975
Ezra D Hartley, Los Angeles, CA (US);
Other;
Abstract
A pressure regulator comprising a regulated pressure chamber and first and second conduits leading to the regulated pressure chamber. The first and second conduits are adapted to communicate with fluid at first and second pressures, respectively. A first valve controls fluid flow between the first conduit and the regulated pressure chamber, and a second valve controls fluid flow between the second conduit and the regulated pressure chamber. The valves are controlled so that the pressure in the regulated pressure chamber can also be controlled. The first valve is subject to failure if the pressure drop across the first valve exceeds a predetermined magnitude, and a pre-regulator controls the pressure in the first conduit to maintain the pressure drop across the first valve no greater than about said first magnitude.