Apparatus and technique for installing an elongated rod in an ea

Details Apparatus and technique for installing an elongated rod in an ea Apparatus and technique for installing an elongated rod in an ea

1991-02-04

1991-11-26

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

4052591, E02F 510

Patent

active

050678540

ABSTRACT:
A tubular casing 2 is installed in a tunnel 82 in the earth and the rod 14, 49 is advanced telescopically through the bore of the casing until a portion 49 of the rod is projected into the tunnel ahead of the casing, whereupon a pair of harpoon-like detents 138 anchor that portion of the rod to the wall of the tunnel so that the casing can be retracted in the opposite direction to remove it from around the remainder of the rod. When the distal end of the casing requires a cap 16 because the earth is unstable, pressurized fluid is applied to a piston-like insert 18 in the bore of the casing, to eject the cap and then the insert itself, before the rod is projected into the tunnel. Moreover, when the cap is equipped with a tunneling tool 74 and the casing is used to excavate its own tunnel, the fluid is ejected into the excavation through openings 120 and 80 in the insert and the cap, respectively, to assist the casing in excavating the tunnel; and when the casing is installed, the rod is used as a stopper 136 in the opening 120 of the insert, to plug it while the fluid ejects the insert. Then, the rod is projected into the tunnel ahead of the casing.

REFERENCES:
patent: 3391543 (1968-07-01), Sweeney
patent: 4648746 (1987-03-01), Abinett
patent: 4710065 (1987-12-01), Leppanen
patent: 4738565 (1988-04-01), Streatfield et al.
patent: 4789268 (1988-12-01), Yarnell
patent: 4911579 (1990-03-01), Lutz et al.
patent: 4936708 (1990-06-01), Perry

Affiliated with

Also associated with

Rating

Apparatus and technique for installing an elongated rod in an ea does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and technique for installing an elongated rod in an ea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and technique for installing an elongated rod in an ea will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2384082