Title: Conical boring tool

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.

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Inventors: Hug, Hans Albert (Weston, MA, US)

Application Number: 623807
Filing Date: 1975-10-20
Publication_date: 1977-01-04
Assignee: Foster-Miller Associates, Inc. (Waltham, MA)
Primary Class(es): 175/346 175/371, 175/374, 384/92
Other Classes:
US Patent Ref:

1302058	Apr, 1919	Layne	175/345.
2122763	Jul, 1938	Smit, Jr.	175/346.
2187037	Jan, 1940	Kirkpatrick	175/347.
3306379	Feb, 1967	Kloesel	175/345.
3845999	Nov, 1974	Zimmer et al.	308/194.
3897837	Aug, 1975	Peterson	175/347.

Other Refs:
Primary Examiner: Purser, Ernest R.
Assistant Examiner: Favreau, Richard E.
Attorney: Morse, Altman, Oates & Bello