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US 2012/0234422 A1Published application
Device for opening and closing pig trap doors
AssigneeSpectra Energy Corp
InventorCory Glenn Pargmann
Life of this patent
Estimating the term…
Abstract
A disclosed pig trap door device serves as a tool for opening and/or closing a pig trap door of a pipeline. The pig trap door device may be fixed to a hinge portion of the pig trap door at a hinge attachment and may also be movably coupled to the pig trap door with a force actuator at a door attachment. Operation of the force actuator causes the door attachment to rotate the pig trap door with sufficient torque to seal and/or remove the pig trap door.
Claims20
A pig trap door device comprising:
- a hinge attachment configured for mounting to a stationary portion of a pig trap of a pipeline;
- a door attachment configured for mounting to a pig trap door of the pig trap, wherein the pig trap door rotates with respect to the pig trap for opening and closing;
- and
- a ratchet device that couples to the hinge attachment and the door attachment, wherein the ratchet device includes a linear force member.
1 more element
A pig trap door device comprising:
- a hinge attachment configured for fixed mounting to a stationary portion of a pig trap of a pipeline;
- a door attachment configured for fixed mounting to a pig trap door of the pig trap, wherein the pig trap door rotates with respect to the pig trap for opening and closing;
- and
- a force actuator that couples to the hinge attachment and the door attachment.
1 more element
A method of rotating a pig trap door of a pipeline pig trap, the method comprising:
- attaching a hinge attachment to a stationary portion of the pipeline pig trap;
- attaching a door attachment to the pig trap door;
- mechanically coupling a linear force actuator between the hinge attachment and the door attachment;
- and
- activating the linear force actuator to move the door attachment with respect to the hinge attachment, wherein the pig trap door is rotated.
2 more elements
Dependencies are inferred from the claim text.