Round shaft chisel

Details Round shaft chisel Round shaft chisel

2007-06-19

2009-02-17

Kreck, John (Department: 3672)

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Rolling or rotatable-type bit mount

C299S110000

Reexamination Certificate

active

07490912

ABSTRACT:
A round shaft chisel with a clamping sleeve, wherein the round shaft chisel has a chisel head and a chisel shaft rotatably maintained in the clamping sleeve. A pivot bearing is between an inner contour of the clamping sleeve and a shaft contour of the chisel shaft so that a center longitudinal axis of the round shaft chisel is pivotably seated with respect to a center longitudinal axis of the clamping sleeve. As a result of the induced tumbling motion of the round shaft chisel within the clamping sleeve30, improved dirt removal can be assured during operations. The improved rolling action results in reduced wear between the clamping sleeve and the chisel shaft, which has advantageous results regarding the service life.

REFERENCES:
patent: 5810449 (1998-09-01), Grathoff
patent: 7270379 (2007-09-01), Stehney
patent: 2003/0015907 (2003-01-01), Sollami
patent: 2004/0118615 (2004-06-01), Beach
patent: 101 60 668 (2003-10-01), None
patent: 196 24 363 (2004-02-01), None
patent: 1 000 721 (2003-08-01), None
patent: 1 163 424 (2003-11-01), None
patent: 1 216 343 (2003-12-01), None

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