Conical boring tool

Details Conical boring tool Conical boring tool

1975-10-20

1977-01-04

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175371, 175374, 308 82, E21B 910

Patent

active

040007839

ABSTRACT:
A self-advancing conical boring tool with frusto-conical roller cutters rotatably mounted to a tapered frame by means of self-aligning spherical roller bearings. Each roller cutter is constrained within a pair of spherical roller bearings for free rotation about an axis that is both oblique and skewed relative to a longitudinal axis of the frame.

REFERENCES:
patent: 1302058 (1919-04-01), Layne
patent: 2122763 (1938-07-01), Smith, Jr.
patent: 2187037 (1940-01-01), Kirkpatrick
patent: 3306379 (1967-02-01), Kloesel
patent: 3845999 (1974-11-01), Zimmer et al.
patent: 3897837 (1975-08-01), Peterson

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