Patent ID: 7140361

Claim:
A stone cutter having blade angle adjustment device comprising: a rectangular base having two ends, two pairs of support plates spacedly secured to said two ends, a pair of longitudinal sliding bars parallel secured to tops of the support plate, two alignment of rectangular through holes spacedly formed in said base, a sink disposed under said base, a plurality of positioning plates spacedly disposed on one end of said base, three longitudinal cutting grooves of different slanting sections spacedly formed in center of said base, a pair of hollow interior rectangular bars respectively disposed at two ends of said base, a U-shaped extension having a pair of lateral rods respectively and slidably inserted into said hollow interior rectangular bars and fastened by a pair of first handled locks; a piece of rectangular salver plate slidably disposed on said longitudinal sliding bars having a plurality of rollers on underside engaged with inner sides of said sliding bars, a pair of support arms spacedly secured to a top adjacent front and rear edges of said salver plate with a pair of pad plates engaged therebetween, said support arms each having a first circular through hole in front lower portion and an arcuate slot in upper portion, each of said arcuate slot having three second circular through holes spacedly formed therein; a motor secured to the top of said salver plate between said support arms having a first screw hole in each opposing lower periphery adjacent front end and respectively engaged with the first circular through holes of said support arms and pivotally secured by a pair of screws and a second screw hole formed in each opposing outer periphery positioned at a middle lower portion selectively engaged with one of the three circular through holes in said arcuate slot and fastened by a pair of second handle locks; a guarded blade perpendicularly secured to an axis of said motor and engageable with each of said longitudinal grooves of said base; whereby, the slanting angles of said blade is adjustable by engaging said second handle locks to different circular through holes in said arcuate slots.