Abstract: A grip lock connector member which connects a supply pipe from a source of water to a fire sprinkler through an interior grip lock connector. The grip lock connector includes a multiplicity of gripper teeth which form a tight grip connection to the supply pipe. The supply pipe is retained within an interior chamber and grasped and retained by the multiplicity of gripper teeth at the interior end of the interior chamber. A gasket or O-ring directly behind the gripper teeth facilitates a leakproof connection. At its opposite end, the grip lock connector includes female mating threads which receive male threads at a top location of a fire sprinkler.

Abstract: A grip lock connector member which connects a supply pipe from a source of water to a fire sprinkler through an interior grip lock connector. The grip lock connector includes a multiplicity of gripper teeth which form a tight grip connection to the supply pipe. The supply pipe is retained within an interior chamber and grasped and retained by the multiplicity of gripper teeth at the interior end of the interior chamber. A gasket or O-ring directly behind the gripper teeth facilitates a leakproof connection. At its opposite end, the grip lock connector includes female mating threads which receive male threads at a top location of a fire sprinkler.

Abstract: Each gripper washer 22 is disposed between a gasket retaining ring 18 and an end connector 14. The gripper washers 22 can be any size and dimension, and made from any material, including but not limited to plastic, polyvinyl chloride, or metal. The gripper washers 22 are a washer-like structure, typically a metallic structure that comprises an interior diameter, a concentric inner periphery and an exterior periphery 24. Each gripper washer 22 is disposed between a gasket retaining ring 18 and an end connector 14, such that the exterior periphery 24 of the gripper washer 22 is in contact with, or in close proximity to, the shoulder 20 of the gasket retaining ring 18.

Abstract: A telescoping pipe coupling comprising a hollow body, a hollow tubular insert slidably disposed within the body, two gasket wells, two end connectors, one end connector coupled to each end of the telescoping pipe coupling, two gripper washer wells, a gasket for sealing the tubular insert with the body, two gaskets for sealing one or more pipe sections to the telescoping pipe coupling, two gasket retaining rings each comprising a shoulder, two gripper washers retained within the two gripper washer wells each comprising an outer periphery, wherein the shoulder of each gasket retaining ring is adjacent to the outer periphery of a gripper washer.

Abstract: A telescoping pipe coupling comprising a hollow body, a hollow tubular insert slidably disposed within the body, two gasket wells, two end connectors, one end connector coupled to each end of the telescoping pipe coupling, two gripper washer wells, a gasket for sealing the tubular insert with the body, two gaskets for sealing one or more pipe sections to the telescoping pipe coupling, two gasket retaining rings each comprising a shoulder, two gripper washers retained within the two gripper washer wells each comprising an outer periphery, wherein the shoulder of each gasket retaining ring is adjacent to the outer periphery of a gripper washer.

Abstract: The invention is a pipe coupling comprising: a) a cylindrical body for accepting and retaining ends of a pair of spaced apart pipe sections, the cylindrical body comprising two opposed ends; b) an end connector attached to each opposed end of the cylindrical body; c) a gasket disposed within an indentation defined within the interior surface of each of the opposed ends of the cylindrical body; d) a gasket retaining ring disposed between each end connector and gasket, wherein the gasket retaining ring comprises a shoulder; and e) a gripper washer comprising an exterior periphery, the gripper washer disposed between each gasket retaining ring and end connector; wherein the gasket retaining ring shoulder contacts and retains the exterior periphery of the gripper washer.