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:
May. 09, 2000
Filed:
Aug. 14, 1998
Michael A Fischer, West Kingston, RI (US);
Grinnell Corporation, Cranston, RI (US);
Abstract
A pendent-type fire protection sprinkler for forming a superimposed combination of an inner, downwardly-directed spray pattern and an outer, umbrella-shaped spray pattern. The pendent-type sprinkler has a body defining an orifice and outlet for flow of fluid from a source and a pair of frame arms extending from the body. The deflector includes a generally plate-like body member defining reentrant slots, which may include a second type of reentrant slots in addition to a first type of reentrant slots, with slots of the second type positioned symmetrically between adjacent slots of the first type. The length of slots of the second type, measured along the slot centerlines extending inwardly from a peripheral edge of the deflector body member generally toward the central axis of the deflector body, being less than the length of slots of the first type. The second type of reentrant slots provides an additional intermediate componentized spray pattern positioned radially between the inner, downwardly-directed spray pattern and the outer, umbrella-shaped spray pattern.