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. 03, 1976
Filed:
Dec. 03, 1973
Mandel L Desnick, St. Louis Park, MN (US);
Leonard J Boler, Minneapolis, MN (US);
Cherne Industrial, Inc., Edina, MN (US);
Abstract
An apparatus for steady-state volume rate flow control from a variable depth liquid having a floating weir assembly of the type with an inlet weir crest over which liquid may flow from said weir crest to a discharge opening through which liquid may flow from said weir. In one form, the weir assembly has a pressure responsive flow control means. When said pressure responsive flow control means is active, said means opposes the buoyancy of said floating weir to position said inlet crest of said weir at a selected distance below the surface of said variable depth liquid independent of the depth of said liquid to establish a steady-state volume rate of liquid flow from said weir. At other times, when said pressure responsive control means is inactive, the buoyancy of said floating weir positions said inlet crest of said weir above the surface of said variable depth liquid independent of the depth of said liquid to establish a zero rate of liquid flow from said weir. A preferred weir assembly has an open-topped circular weir crest, with its circular edge concentric with a first horizontal axis, and with the weir crest supported at one end of a vertically swinging support arm which has its other end arranged for support and swinging movement around a parallel second horizontal axis.