Tool driving or impacting – Advance causing or controlling means – Rotary drive and advance originate from same mechanical element
Patent
1986-02-19
1987-09-08
Kazenske, E. R.
Tool driving or impacting
Advance causing or controlling means
Rotary drive and advance originate from same mechanical element
173159, 173160, 175203, 408137, B23Q 533
Patent
active
046917870
ABSTRACT:
An earth auger is provided which can be compacted, lightened and adjusted with respect to feed speed according to geology. The earth auger has a screw having a spiral blade provided with notches arranged axially linearly. A first rotary member and a second rotary member arranged coaxially in a case for the screw and surrounding partially the screw are disposed rotatably about the axis. The first rotary member has a key engaging the notches of the screw, and the second rotary member has a thread groove meshing with the blade of the screw. The first and the second rotary members are rotated respectively in any one of forward and backward directions through a drive mechanism. The screw is rotated by at least one of rotational operations of the first and the second rotary members to advance or retreat relative to the case for excavating.
REFERENCES:
patent: 2090330 (1937-08-01), Jones
patent: 2930587 (1960-03-01), Seawright
patent: 2999550 (1961-09-01), Gerentes
patent: 3955629 (1976-05-01), Turner
patent: 4201271 (1980-05-01), Evans
Kabushiki Kaisha Iseki Kaihatsu Koki
Kazenske E. R.
Phan Hien H.
Yee Stephen F. K.
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