Elliptical manway cutter

Details Elliptical manway cutter Elliptical manway cutter

1993-10-18

1995-07-04

Terrell, William E.

Turning

Lathe

Having facing tool fed transverse to work

82 13, 82113, B23B 326, B23B 516, B23B 29034

Patent

active

054290210

ABSTRACT:
A machine tool for resurfacing seats surrounding non-circular openings in members, such as elliptical manways, includes a housing adapted to be mounted in the opening, and a tool bit carried by a slide mechanism mounted on the housing for rotation about a central axis. The slide member is resiliently biased outwardly to urge a tracker wheel into engagement with an inner surface of the opening, whereby the tool bit is constrained to follow the contour of the non-circular opening as it moves across the seat during a resurfacing operation. Movement of the tool bit across the surface being refaced is achieved by a feed screw driven from a feed sprocket that engages a tripper pin upon each revolution of the tool about the central axis.

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