Patent ID: 6588111
Filing Date: 2003-07-08
Classification: B27B

Abstract:
An undercut saw having a central axis; said saw comprising:a cutting assembly comprising: a motor assembly including: a case including: an outer surface; and an electric motor mounted within said case and rotatable about the central axis; a shaft including: an upper end connected to said motor for rotation by said motor about the central axis; and a lower end; a thin, planar cutting blade attached to said lower end of said shaft so as to rotate with said shaft about the central axis in a plane perpendicular to the central axis; said cutting blade extending radially outward past said motor case and terminating radially in a circumferential cutting edge; and a base for supporting said cutting assembly above a support surface; said base comprising: an inner portion including: a sleeve horizontally surrounding said motor case and supporting said case such that the central axis is vertical; said sleeve including: an inner surface; and an outer surface; and an outer portion including: a horizontal portion connected to said inner portion and extending radially outward therefrom and having a periphery past the blade circumference so as to cover said blade except for an exposed cutting area; and a generally vertical leg portion extending down from the periphery of said horizontal portion and terminating in a foot for resting on the support surface; and wherein said case and said sleeve are cooperatively adapted such that said case can be selectively moved vertically within said sleeve to a selected position and retained in the selected position so as to adjust the height of said blade relative to said foot; wherein said sleeve and said case include cooperating screw means for moving said case vertically in said sleeve upon rotation of said case relative to said sleeve about the central axis; wherein said screw means comprises external helical threads on said outer surface of said case and cooperating internal threads on said inner surface of said sleeve; and further including: a locking ring surrounding said case and including: an inner surface including: inner threads cooperating with said external threads of said case so as to move vertically relative to said case with rotation of said ring; and a bottom surface for bearing against said sleeve in a locking position wherein rotation of said case relative to said sleeve is prevented.