Borer head with planetary gearing

Details Borer head with planetary gearing Borer head with planetary gearing

1985-02-22

1986-12-09

Leppink, James A.

Boring or penetrating the earth

Below-ground mechanical motion converting means relatively...

175325, 175331, 175334, 175344, 299 85, E21B 1012, E21B 1028

Patent

active

046275010

ABSTRACT:
In a borer head for drilling boreholes in rock structures and including a drive shaft connected to a drive of a drilling machine, a central shaft coupled to the drive shaft, and a tool holder with cutters driven by a planetary gearing connected to the central shaft, supporting elements, engageable with a cylindrical wall of the borehole being drilled, are provided. The supporting elements are operatively connected to the central shaft and also to the tool holder so that the tool holder is driven into a slow rotation about the central shaft.

REFERENCES:
patent: 540306 (1895-06-01), Fry
patent: 1333491 (1920-03-01), Hughes
patent: 2850272 (1958-09-01), Joy
patent: 3376942 (1968-04-01), van Winkle
patent: 3387892 (1968-06-01), Fischer et al.
patent: 3412816 (1968-11-01), Lautsch
patent: 3477762 (1969-11-01), Frenyo et al.
patent: 3729057 (1973-04-01), Werner
patent: 3771611 (1973-10-01), Omura
patent: 3945445 (1976-03-01), Ikeda
patent: 4381038 (1983-04-01), Sugden

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