Portable boring machine

Details Portable boring machine Portable boring machine

1989-08-02

1991-02-05

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

74 57, 74 84R, 74120, 82 14, 408129, 408135, 408708, B23B 4112

Patent

active

049900374

ABSTRACT:
A boring machine includes a power unit having a housing, a drive member for engaging a boring bar, and a motor for driving the drive member to rotate relative to the housing. The boring machine also includes a bearing assembly comprising an inner bearing member defining a passage through which the boring bar extends, and an outer bearing member in which the inner bearing member is fitted in a manner permitting angular movement of the inner bearing member relative to the outer bearing member about axes perpendicular to the axis of the passage defined by the inner bearing member. In use, the bearing assembly is attached to a workpiece in a manner preventing movement of the outer bearing member relative to the workpiece, and a collapsible torque transmission linkage connects the housing of the power unit to the outer bearing member, whereby the housing unit is held against rotation relative to the outer bearing member.

REFERENCES:
patent: 1794149 (1931-02-01), Collins
patent: 1862866 (1932-06-01), Storm
patent: 1899128 (1933-02-01), Andersen
patent: 2170054 (1939-08-01), Jeschor
patent: 2963927 (1960-12-01), Hanger
patent: 4406566 (1983-09-01), Bauer
patent: 4609311 (1986-09-01), Pettyjohn
patent: 4850756 (1989-07-01), Dubois

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