Releaseable steel cable anchor and method for withdrawing the sa

Details Releaseable steel cable anchor and method for withdrawing the sa Releaseable steel cable anchor and method for withdrawing the sa

1974-01-25

1976-02-10

Lanham, C. W.

Metal working

Method of mechanical manufacture

Shaping mating parts for reassembly in different positions

52166, 61 45B, 61 63, B23P 1902

Patent

active

039369242

ABSTRACT:
A releaseable steel cable anchor comprises a steel cable assembly encased within a thermoplastic resin which bonds the cable assembly to an anchor body embedded within the ground. Typically, the cable assembly is buried in a hole filled with a hardening material such as cement or mortar, which forms the anchor body. Either electrical heating wire or an elongated receptacle to receive a combustible material is provided along substantially the entire length of the resin encasing the cable assembly in order to melt and/or combust the resin material encasing the steel cables, whereupon the steel cables may be readily withdrawn from the anchor assembly.
A method for withdrawing the steel cable anchor from its embedded position in the ground comprises the steps of debonding, by melting or combustion, the encasing thermoplastic resin by either igniting a combustible material disposed within or adjacent the resin, or by passing electrical energy through a heating wire disposed along substantially the entire length of the encasing resin. A withdrawing force is then applied to the cable.

REFERENCES:
patent: 3050436 (1962-08-01), Stepanski et al.
patent: 3326004 (1967-06-01), Williams
patent: 3379019 (1968-04-01), Williams
patent: 3615960 (1971-10-01), Hoshii
patent: 3695045 (1972-10-01), Williams
patent: 3702060 (1972-11-01), Cumming
patent: 3738071 (1973-06-01), Finsterwalder
patent: 3753354 (1973-08-01), Bauer
patent: 3756388 (1973-09-01), Murphy

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