Title: Guiding means for boring bar

Abstract: Guide means are provided to guide a boring bar to provide a concentric opening in a work piece. The boring bar is in the form of a hollow sleeve which is guided by a separable guide pin fixed to a work table and which telescopes into the sleeve as the boring bar moves into the work piece. In one embodiment, a guide element projects inwardly into the opening in the sleeve to engage the guide pin. In another embodiment a roller bearing has a portion of its periphery projecting through a slot in the boring bar into the interior of the sleeve to engage the telescoping guide pin. Use of the hollow boring bar and the telescopic guide pin minimizes the length which otherwise would be required for a boring bar with guide means.

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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.