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:
Aug. 17, 1993
Filed:
May. 20, 1992
Paul E George, II, Dublin, OH (US);
Richard E Wendorf, Bothell, WA (US);
Bruce E Taber, Bothell, WA (US);
Gas Research Institute, Chicago, IL (US);
Abstract
A pressure regulating valve 10 is provided in a housing 11 filled with oil 23 and having an inlet port 12 and an outlet port 13. A straight elongate vertical tube 14 having a lengthwise slot 19 near its lower end 15 is affixed to the housing and communicates with the inlet port. Closely fitting down into the tube is a piston 16, slidable between a lower position 29 with its lower end 17 below the slot and a substantially higher upper position. A coaxial annular weight 22, surrounding upper portions of the piston and the tube, is affixed to the piston to exert a downward force thereon by virtue of the gravitational attraction of the weight to the earth. When oil is supplied under pressure to the inlet port, the oil presses upward, and the weight presses downward, against the piston; and when the lower end of the piston is at a level between the ends of the slot, the oil flows in from the inlet port, through the open portion of the slot, into the other space in the housing, and out through the outlet port, at a substantially constant predetermined pressure.