Drive point locking method and apparatus

Details Drive point locking method and apparatus Drive point locking method and apparatus

1995-04-10

1996-08-06

Neuder, William P.

Boring or penetrating the earth

Boring without earth removal

Drive point detached from shaft to form cased bore or with...

E21B 4902

Patent

active

055424813

ABSTRACT:
An assembly for locking the drive point at the forward end of an elongated sample tube includes a tapered drive point presenting a threaded chamber, a bolt having a threaded stem, a collar disposed about the stem and a locking member disposed about the stem and adapted for engaging a recess near the forward end of the tube. The bolt head may present a tool receiving slot for remotely releasing the locked drive point assembly. The bolt stem may include a recessed groove for receiving a setscrew through the drive point to ensure that the bolt does not become completely disengaged from the drive point when the point is released from the forward end of the sample tube.

REFERENCES:
patent: 955729 (1910-04-01), Welsh
patent: 1906706 (1933-05-01), Moore
patent: 1969251 (1934-08-01), Bald
patent: 1979599 (1934-11-01), Bald et al.
patent: 2283650 (1942-05-01), Sanborn
patent: 5186263 (1993-02-01), Kejr et al.

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