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. 24, 2004
Filed:
Aug. 29, 2001
Matthew G. Beutler, Temecula, CA (US);
Michael L. Clark, San Marcos, CA (US);
Hunter Industries, Inc., San Marcos, CA (US);
Abstract
An adjustable stator is mounted in the lower end of a pop-up sprinkler riser and includes a vertically extending frame portion and a pair of valve portions that extend horizontally from an upper end of the frame portion. A coil spring is squeezed between a lower end of a drive subassembly and a mandrel mounted in a lower end of the frame portion. The mandrel and the frame portion have mating projections which allow the vertical position of the mandrel to be adjusted. This adjusts the downward biasing force exerted by the coil spring against the frame portion and the valve members carried thereby. This varies the pressure of a water stream flowing past a turbine in the riser, and the speed of rotation of the turbine which in turn changes the speed of rotation of a nozzle driven by the turbine.