Patent ID: 6085777
Filing Date: 2000-07-11
Classification: F17D,G01F,Y10T

Abstract:
A pipeline insertion device adapted to be mounted to a pipeline, the insertion device comprising:a lower cylinder head;a first cylinder structure mounted on said lower cylinder head, said first cylinder structure defined by a first housing and having a first, axially movable piston within a first chamber defined by the first housing, the first piston having a bore therethrough, the first cylinder structure further having a first hollow shaft coupled to the first piston and movable therewith, the first hollow shaft adapted to extend beyond the first housing and into the pipeline upon selective movement of the first piston;a second cylinder structure defined by a second housing and having a second, axially movable piston within a second chamber defined by the second housing, the second cylinder structure coupled to the first piston by a second hollow shaft, the second cylinder structure having a third hollow shaft coupled to the second piston and extending beyond the second cylinder housing, the third hollow shaft further extending through the second hollow shaft, the piston bore, and the first hollow shaft, and adapted to extend beyond the first cylinder housing upon selective movement of the second piston; anda pipeline insertion element mounted on an end of said third hollow shaft opposite said second piston, for selective insertion of said third hollow shaft and said pipeline insertion element into the pipeline upon actuation of said first cylinder structure and said second cylinder structure.