Basket type core retainer

Details Basket type core retainer Basket type core retainer

1974-03-08

1976-04-27

Purser, Ernest R.

Boring or penetrating the earth

With means movable relative to tool below ground to stop...

With undisturbed core receiver

175249, E21B 920

Patent

active

039528170

ABSTRACT:
Basket type core retainer apparatus that includes a core receiving tube having an axially inner end, an annular drill bit or tubular extension connected to the inner end of the core receiving tube and a core retainer cooperatively mounted by the tube and the bit or tubular extension to permit passage of core into the tube and retain a core or a soil sample in the tube. The core retainer includes a mounting ring that mounts a pair of spring finger assemblies to extend axially outwardly thereof. The finger assemblies are each formed from a single sheet of material, the fingers of the assemblies in a closed (core retaining) position having each finger of one assembly in partial overlapping relationship to an adjacent finger of the other assembly and in partial underlapping relationship to an adjacent finger of said other assembly. The fingers are movable to permit passage of a core or a soil sample into the receiving tube.

REFERENCES:
patent: 314777 (1885-03-01), Ball
patent: 1655644 (1928-01-01), Baker
patent: 1720877 (1929-07-01), Baker
patent: 1761292 (1930-06-01), Bone
patent: 1797550 (1931-03-01), Hamaker
patent: 2083062 (1937-06-01), Hampton
patent: 3008529 (1961-11-01), Lynch et al.
patent: 3807234 (1974-04-01), Duperon
patent: 3833075 (1974-09-01), Bachman et al.

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