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:
Nov. 23, 1999
Filed:
Feb. 26, 1998
Loren W Scott, Carlsbad, CA (US);
Hunter Industries, Inc., San Marcos, CA (US);
Abstract
A pop-up sprinkler unit includes an outer cylindrical fixed housing for subsurface mounting, with a riser reciprocally mounted in a central bore of the housing for extending up through a portion of the soil. A radially retractable and expandable resilient plastic containment ring is mounted at an outlet end of the housing and engages an annular inner shoulder of the housing for retaining a coil spring and the riser in the bore. The containment ring is split to enable expansion and retraction. It has a first height throughout a first portion of its circumference and a second lower height throughout a second portion of its circumference to enable overlap during insertion of the ring into the upper end of the fixed housing. This configuration eliminates a gap at the split when the ring is in its retaining position, thereby preventing debris from entering the bore of the housing and preventing complete extension and/or retraction of the riser.