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:
Sep. 30, 1997
Filed:
Jun. 18, 1996
Robert D Klein, Milton-Freewater, OR (US);
Jeffrey P Kreitzberg, Walla Walla, WA (US);
Nelson Irrigation Corporation, Walla Walla, WA (US);
Abstract
A rate-of-flow control valve assembly actuable as a function of velocity of fluid in a conduit includes a sensing plate projecting into the conduit, substantially perpendicular to a direction of flow in the conduit and a sleeve valve located downstream of the sensing plate. The sleeve valve includes a substantially cylindrical, flexible rubber sleeve surrounded by a control chamber, and an outer rigid sleeve, the flexible sleeve adapted to vary the flow rate of the fluid through the sleeve valve. Also included is a spool valve controller operatively connected to the sensing plate and in communication with the control chamber in the sleeve valve, the spool valve operable to control the flow of fluid into and out of the control chamber as a function of movement of the sensing plate in the conduit.