초록 ▼

An improved pipe branch fitting for use with a pipe having a pre-cut hole is disclosed. The branch fitting has a cylindrical body freely slidable along the pipe to a point where the hole is pre-cut. On one side, the cylindrical body carries an internally threaded boss into which a modified sprinkler

An improved pipe branch fitting for use with a pipe having a pre-cut hole is disclosed. The branch fitting has a cylindrical body freely slidable along the pipe to a point where the hole is pre-cut. On one side, the cylindrical body carries an internally threaded boss into which a modified sprinkler head may be threaded. A gasket positioned between the sprinkler head and the pipe gives the seal as the sprinkler head bears upon the gasket upon tightening of the sprinkler head. The inner end of the modified sprinkler head has a stepped shoulder which abuts the periphery of the hole in the pipe and limits compression applied to the gasket. A reduced diameter end portion of the modified sprinkler head locates itself in the hole and indicates if the fitting is misaligned with the hole. The end walls of the body are each tapered toward the boss to facilitate the sliding of the cylindrical body, when assembled on the pipe are supporting structures of a building in which the piping system is being installed.

대표청구항 ▼

In combination, a pipe branch fitting and a sprinkler for use with a pipe having a pre-cut hole, the branch fitting comprising: (a) a continuous cylindrical tube having a cylindrical inner surface adapted for embracement around the pipe at the position of the hole and having opposing axial end walls

In combination, a pipe branch fitting and a sprinkler for use with a pipe having a pre-cut hole, the branch fitting comprising: (a) a continuous cylindrical tube having a cylindrical inner surface adapted for embracement around the pipe at the position of the hole and having opposing axial end walls that slant axially inwardly towards one another; (b) an upstanding hollow, internally threaded boss on one side of the cylindrical tube; (c) a resilient sealing gasket at the inner side of the boss; and a one-piece sprinkler head comprising: (i)(a) a threaded portion adapted for retention in the threaded boss and having a generally planar annular surface bearing rotatably on the sealing gasket and being formed adjacent its inner end with a reduced diameter spigot end portion adapted for repositioning in the pre-cut hole of the pipe, adjacent its opposite outer end with at least one wrench receiving surface so that the sprinkler head can be turned by a wrench means to displace the sprinkler head inwardly into the threaded boss to compress the sealing gasket against the pipe, (b) an inward-facing shoulder on the spigot end portion for abutment on the outer surface of the pipe within the sealing gasket, whereby the compression applied to the gasket by the sprinkler head is restricted to a predetermined limit, the spigot end portion extending axially beyond the threaded portion and being adapted, in use, to extend a short distance beyond said inward-facing shoulder and (c) a distribution means for sprinkling fluid exiting the pipe; and (ii) wherein the sealing gasket has at least one annular surface portion lying substantially in a generally transverse plane, and a saddle-shaped annular surface portion adapted to conform to the surface of the pipe around the pre-cut hole of the pipe and being adapted to be confined between and in substantially complete conformity with the adjacent surfaces of the sprinkler head the branch fitting, and the pipe.