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. 05, 1996
Filed:
May. 31, 1995
Norman J MacDonald, III, Lunenburg, MA (US);
PNM, Inc., Boxborough, MA (US);
Abstract
A relocatable sprinkler assemblage can be safely relocated while pressurized and operational and does not effect the temperature sensitivity of the sprinkler head. The assemblage includes: (a) a rigid fitting communicating with a flexible sprinkler conduit, the fitting having a conduit end and a head end; (b) the fitting having an unthreaded outer surface adjacent to the conduit end and a threaded outer surface adjacent to the head end; (c) the fitting having an interior surface concentric about the axis of the fitting, the diameter of the inner surface at the head being less than the diameter of the interior surface at the conduit end; (d) a sprinkler head having an externally threaded cylindrical pipe and a thermally sensitive plug, the externally threaded cylindrical pipe being turned into the interior threaded surface of the fitting; (f) a rigid cup with an internal thread at the mouth adapted to be turned onto the head end threaded outer surface, the attachment being substantially watertight; (g) the cup being a transparent polymer for determining the activation condition of the sprinkler head; and (h) the fitting having a threaded outer surface that fits into a hole in a ceiling and is clamped to the ceiling by a threaded nut turned onto the threaded outer surface.