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. 14, 1984
Filed:
Feb. 16, 1982
Applicant:
Inventor:
John E Lindberg, Point Richmond, CA (US);
Assignee:
Owen, Wickersham & Erickson, San Francisco, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
1376142 ; 13751625 ; 137528 ; 137556 ; 123 / ;
Abstract
A pressure-actuated flow control valve. A valve housing has an inlet and an outlet with first and second spaced-apart seats between them and a permanent magnet on the inlet side of the first seat, which is closed to the inlet. A ferromagnetic ball in between the seats is urged by said magnet toward the first seat to check backflow. The valve responds to pressure differential to move the ball away from the first seat and toward the second seat. Between the seats, the passage widens toward the second seat. There may be a needle valve on the outlet side of the valve enabling controlling the flow therethrough.