NORMAN J MACDONALD
Plumbers in Acton, MA
License number
Massachusetts 7004
Expiration Date
May 1, 1988
Type
Master Plumber
Address
Address
Acton, MA 01720
Professional information
Sprinkler System
US Patent:
5396959, Mar 14, 1995
Filed:
Sep 20, 1993
Appl. No.:
8/123110
Inventors:
Norman Macdonald - Boxboro MA
Assignee:
PNM, Inc. - Boxborough MA
International Classification:
A62C 3568
US Classification:
169 51
Abstract:
A sprinkler system, for cooperation with an array of ceiling tiles, essentially features a mount of tiles including at least one with a central opening, a web disposed above the mount of tiles and including a central hub and legs extending therefrom to the corners of a frame with a dimensional profile like that of the tiles, a number of ceiling wires supporting the frame in spaced relation to a ceiling, a sprinkler head supported within the central hub and extending through the central opening, and apparatus for connecting the sprinkler head to a source of fluid. Preferably, the apparatus includes a rigid stationary water grid and supply and a flexible hose connecting the sprinkler head to the water grid and supply. Preferably, the flexible hose is an annealed stainless steel braid hose having an open pitch.