Apparatus for extracting cores

Details Apparatus for extracting cores Apparatus for extracting cores

1980-01-31

1981-07-21

Pate, III, William F.

Boring or penetrating the earth

With means movable relative to tool to receive, retain, or...

Core-retaining or severing means

175298, E21B 1002

Patent

active

042793157

ABSTRACT:
An apparatus for extracting cores comprises an outer tube, an inner tube which contains a core receiving space, and a striking device which comprises a hammer and an anvil for producing a periodic axial movement of the inner tube relative to the outer tube, wherein the inner tube, the striking device and an associated supporting body form a unit which may be moved through the outer tube in the axial direction thereof by means of a withdrawal mechanism, and wherein a part of this unit joined to an element of the striking device for rotational entrainment may be connected to the inner tube.

REFERENCES:
patent: 2120240 (1938-06-01), Chappel
patent: 2623733 (1952-12-01), Sewell

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