Restrained pipe coupling
AssigneeRobar Industries Ltd.
InventorsJonathan Reinheimer, Corbin Turner
Life of this patent
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Abstract
A restrained pipe coupling includes a restraining gland assembly having an annular main body with multiple gripper units movably connected to the annular main body. Each gripper unit includes a gripper housing having a bottom sliding surface, a gripper bolt fixedly secured to the gripper housing and radially movable through a gripper opening in the annular main body and fixable at different positions, and a gripper body having a top sliding surface and a bottom gripping surface. The sliding surfaces of the gripper housing and the gripper body are in slidable contact and angled between 20 and 30 degrees from the axial direction of the annular main body.
Claims22
A restrained pipe coupling comprising:
- a restraining gland assembly comprising
- an annular main body with circumferentially-spaced and radially-facing gripper openings;
- and
- multiple gripper units movably connected to the annular main body, each gripper unit comprising a gripper housing having a bottom sliding surface, a gripper bolt fixedly secured to the gripper housing and radially movable through one of the gripper openings and fixable at different positions relative to the annular main body, and a gripper body having a top sliding surface and a bottom gripping surface,
- wherein the sliding surfaces of the gripper housing and the gripper body are in slidable contact and angled between 20 and 30 degrees from an axial direction of the annular main body;
- and
- wherein one of the gripper housing and gripper body comprises at least one side wall and the other of the gripper housing and gripper body comprises a stopper positioned to contact an edge of the at least one side wall when the gripper body has reached a selected sliding limit relative to the gripper housing.
A restrained pipe coupling comprising:
- a restraining gland assembly comprising
- an annular main body with circumferentially-spaced and radially-facing gripper openings;
- and
- multiple gripper units movably connected to the annular main body, each gripper unit comprising a gripper housing having a bottom sliding surface, a gripper bolt fixedly secured to the gripper housing and radially movable through one of the gripper openings and fixable at different positions relative to the annular main body, and a gripper body having a top sliding surface and a bottom gripping surface,
- wherein the sliding surfaces of the gripper housing and the gripper body are in slidable contact and angled between 20 and 30 degrees from an axial direction of the annular main body;
- and
- wherein the annular main body has a channel with angled side walls, and the gripper housing has a chamfered top surface mating with the angled side walls of the channel such that the gripper units are seated in the channel when in a retracted position.
Dependencies are inferred from the claim text.