Title: Guiding means for boring bar

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Claims: I claim:

1. In apparatus for boring holes including a rotatable and longitudinally movable boring bar having a free end and a generally radially projecting work tool for engaging and removing material from a bore in a work piece, the improvement comprising wall means defining an axial opening in said boring bar and a guide element separate from said boring bar and telescopically receivable in said opening, and guide means on said boring bar projecting inwardly into said axial opening and engageable with said guide element.

2. The improvement of claim 1 wherein said guide means comprises a pin mounted in the wall of said boring bar and projecting inwardly for engagement with said guide element.

3. The improvement of claim 1 including a slot in said wall means and wherein said guide means comprises a roller bearing having a portion of its periphery projecting inwardly into the axial opening in said boring bar through said slot and having an axis of rotation parallel to the axis of said boring bar.

4. The improvement of claim 1 wherein said boring bar has a longitudinal slot in the outer wall to facilitate guided deflection by said guide means and guide element.

Other info:

Inventors: Janiszewski, Kasimir (Franklin, WI, US)

Application Number: 555461
Filing Date: 1975-03-05
Publication_date: 1976-02-03
Assignee:
Primary Class(es): 82/1.2 82/1.4, 408/82
Other Classes:
US Patent Ref:

2500469	Mar, 1950	Rekettye	408/82.
3795160	Mar, 1974	Janiszewski	82/1.

Other Refs: 568,844520,335

Apr, 1945	UK
Mar, 1931	DD

Primary Examiner: Hinson, Harrison L.
Assistant Examiner:
Attorney: Fuller; Henry C.