Cutting – Processes
Patent
1991-05-09
1992-08-11
Phan, Hien H.
Cutting
Processes
30275, 83786, B27B 1902
Patent
active
051369044
ABSTRACT:
Powered coping saw systems and corresponding methods of cutting workpieces with powered coping saws are provided by this invention, which holds a workpiece stationary and moves the reciprocating saw blade relative to the workpiece. By disposing the workpiece in different planes and at different angular orientation, two dimensional and three dimensional cuts may be made. The saw motor is in a frame pivotable about a base, and drives a reciprocating saw blade holding second frame pivoted in turn on the first frame to move the powered saw blade over a two dimensional cutting range generally perpendicular to the saw blade. Relative positioning of a workpiece, such as a longitudinally disposed contoured molding strip which is to be cut for matching corner mounts, for angular positioning with respect to the saw blade permits two dimensional and three dimensional cutting patterns to be followed in the workpiece. When the contoured molding is cut at an angle to its resident plane, a cutting pattern is defined on its contoured surface which can be followed by the movable, rotatable sawblade. By cutting along this defined pattern while the workpiece is stationary, as is possible with a rotating and laterally movable saw blade, a perfect joint may be cut for either chair molding joints or crown molding joints, for example.
REFERENCES:
patent: 4554738 (1985-11-01), Barrett et al.
patent: 4803781 (1989-02-01), Jung et al.
patent: 4825741 (1989-05-01), Wellington et al.
Brown Laurence R.
Phan Hien H.
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