US 11,953,134 B2 · Mechanical fitting for a plastic pipe connection and method for making the same

Abstract

A fitting for a pipe has a cylindrical sleeve and a spigot fitted concentrically within the sleeve. The sleeve is slidable along the spigot in a proximal direction. The sleeve has a gripper ring cavity with a conical bearing surface with a diameter that is smaller at the distal end and a larger at the proximal end. One or more gripper rings fit within the cavity and slidingly engage the bearing surface. The spigot has an outer surface sized to fit within a proximal end of the pipe. The inner surface of the gripper rings and the outer surface of the spigot define an annular space with a first radial width sized to accept insertion of the proximal end of the pipe. When the sleeve is moved with respect to the spigot in the proximal direction toward a sealed position, the rings are inwardly compressed by the bearing surface to grip an outer surface of the pipe. The end of the pipe is drawn into a space between the sleeve and the spigot with radial width smaller than the first radial width.

Claims18

Dependent claims

A fitting for a pipe comprising:

a cylindrical sleeve comprising:
a gripper ring cavity having a conical bearing surface with a smaller diameter toward a distal end and a larger diameter toward a proximal end;
a plurality of gripper rings disposed within the gripper ring cavity, wherein an outer surface of the rings slidingly engages the bearing surface, and wherein the rings are movable in an axial direction along the conical bearing surface;
and
a spigot disposed concentrically within the sleeve and having an outer surface sized to fit within a proximal end of the pipe;
wherein the sleeve is slideable along the spigot in a proximal direction, wherein the inner surface of the gripper rings and the outer surface of the spigot define an annular space with a first radial width sized to accept insertion of the proximal end of the pipe, and wherein, when the sleeve is moved with respect to the spigot in the proximal direction toward a sealed position, the plurality of gripper rings are inwardly compressed by the bearing surface to grip an outer surface of the pipe.

3 more elements

A fitting for a pipe comprising:

a cylindrical sleeve comprising a gripper at a proximal end of the sleeve, wherein the gripper has a first inner diameter in an unsealed configuration and a second inner diameter in a sealed configuration, wherein the gripper comprises a plurality of gripper rings, wherein the first diameter is greater than the second diameter;
and
a spigot disposed concentrically within the sleeve and having an outer surface sized to fit within a proximal end of the pipe,
wherein the sleeve is slidable along the spigot in a proximal direction to move from the unsealed configuration to the sealed configuration,
wherein, the inner surface of the gripper and the outer surface of the spigot define an annular space with a first radial width sized to accept insertion of the proximal end of the pipe, and
wherein, when the sleeve is moved with respect to the spigot in the proximal direction toward a sealed position, the gripper is inwardly compressed from the first diameter to the second diameter.

3 more elements

Dependencies are inferred from the claim text.

Mechanical fitting for a plastic pipe connection and method for making the same

Life of this patent

Mechanical fitting for a plastic pipe connection and method for making the same

Life of this patent

Abstract

Claims18