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, 1981
Filed:
Jun. 21, 1979
F Barton Brown, La Crescenta, CA (US);
Kobe, Inc., Commerce, CA (US);
Abstract
The invention provides a high flow rate standing valve for oil wells of the type employing a plurality of check valve units disposed in parallel between inlet and outlet passages, the flow area of the inlet or outlet passage each being not in excess of the total flow areas of the individual check valves so that no significant pressure drop is produced by fluid flow through the check valves in their open position. Specifically, the invention provides an improved configuration for such standing valves permitting the convenient manufacture and assembly of the valve components. In a modification of the invention, the standing valve housing is constructed so that its lower end is mounted on and co-operates with a conventional well safety valve.