Abstract: A fire sprinkler including a body defining an inlet adapted for connection to a supply of fire extinguishing fluid and an outlet adapted for placement in a zone to be sprinkled; a valve retained by the body and movable between a closed position providing a fluid tight seal between the inlet and the outlet and an open position allowing fluid flow therebetween; an actuator for moving the valve from the closed position to the open position in response to a predetermined condition; and a deflector disposed to disperse into the zone fluid discharged from the outlet; the deflector comprising a plurality of deflector elements each adapted to deflect fluid discharged from the outlet. Also included is a coupling between the deflector elements and adapted to permit adjustment in the relative positions of the deflector elements so as to selectively change the pattern in which fluid discharged from the outlet is dispersed into the zone.

Abstract: A fire sprinkler head including a tubular body defining an inlet adapted for connection to a supply of pressurized fire extinguishing fluid, an outlet adapted for placement in a fire protected zone, and a cylindrical inner wall extending between the inlet and outlet and defining an annular recess; and a valve comprising a piston and a cup-shaped gasket retained by and mounted for movement within the body from a closed position to an open position and providing in the closed position a fluid tight seal between the inlet and the outlet and allowing in the open position fluid flow therebetween; the cup-shaped gasket comprising a bottom portion for receiving a force for inducing the gasket movement and produced by pressurized fluid at the inlet, an annular skirt portion having one end joined to the bottom portion and an opposite end retained by the piston, and an annular lip portion extending outwardly from the skirt portion and received by the annular recess so as to form a fluid tight seal therewith.

Abstract: An automatic on-off fire extinguishing sprinkler head including a housing defining inlet and outlet openings; a valve retained by the housing and disposed between the inlet and outlet openings, the valve being movable between a closed position in which it prevents fluid flow between the inlet and outlet openings and an open position in which it allows fluid flow therebetween and a latch releasably latching the valve in the closed position. A release mechanism responds to a sensor by releasing the latch to allow movement of the valve into the open position at a predetermined ambient temperature. Operatively coupled to the valve is a temperature responsive actuator shaped and arranged to allow movement of the valve into its open position in response to ambient temperatures above a given level and to force the valve into its closed position in response to ambient temperatures below the given level.

Abstract: A pipe joint consisting of first and second pipes having ends juxtaposed to provide a fluid tight interconnection therebetween. An outer surface of the first pipe defines a first circumferential coupling groove and a first circumferential seal groove disposed between the first coupling groove and the connected end of the first pipe. An outer surface of the second pipe defines a second circumferential coupling groove and a second circumferential seal groove disposed between the second coupling groove and the joined end of the second pipe. Fitted over the outer surfaces of the first and second pipes is a resilient sleeve covering the first and second seal grooves. A clamp assembly with inward projections overlays the sleeve and is radially collapsible to forcibly engage the resilient sleeve.

Abstract: A fire sprinkler including a valve retained by a tubular body that defines an inlet for connection to a supply of pressurized fire extinguishing fluid and an outlet for placement in a fire protected zone. The valve is movable from a closed position to an open position by a primary force produced by the pressurized fluid at the inlet. In the closed position, the valve provides a fluid tight seal between the inlet and the outlet and in the open position allows fluid flow therebetween. Retained by the valve and movable therewith is a locking mechanism reciprocably movable between an engaged position and a disengaged position. The locking mechanism is adapted in the engaged position to transfer between the valve and the tubular body a substantial first component of the primary force and to thereby prevent relative movement therebetween and is adapted in the disengaged position to substantially eliminate the first component of force and thereby allow relative movement therebetween.

Abstract: An automatic on-off sprinkler head including a housing that defines a primary chamber and a pilot chamber enclosed thereby; an inlet orifice and outlet orifice both opening into the primary chamber; a primary valve seat located between the inlet and the outlet orifices; a movable valve closure comprising a flexible diaphragm wall portion separating the primary chamber from the pilot chamber, the valve closure remaining against the valve seat to prevent fluid flow between the inlet and the outlet orifices in response to less than a predetermined differential pressure across the wall portion and movable away from the valve seat to permit fluid flow between the inlet and outlet orifices in response to a differential pressure greater than the predetermined pressure; a fill port providing limited fluid flow between the inlet orifice and the pilot chamber; a release port for discharging fluid from the pilot chamber; and a pilot valve controlling fluid flow through the release port.

Abstract: A fire sprinkler valve with a valve member coupled to a primary temperature responsive control mechanism that is activated to open the valve in response to ambient temperatures above a given temperature level and that urges the valve toward closed position in response to temperatures below that level. An auxiliary control causes automatic reclosure of the valve only in response to a decrease in an ambient temperature to below the given level.