Minature motorized annular hand held dental saw

A power operated saw machine for cutting materials through a solid element, said power operated saw machine comprising in combination:

• a main body 22 having a force end and an aft end, a rotating axis 72 and being capable of being oriented about said rotating axis,
• an annular cutting blade 54 comprising an outer edge, a first flat face and a second flat face opposite to said first flat face, and an inner edge, said outer edge corresponding to a perimeter, said annular cutting blade 54 being mounted by mounting means on said force end of said main body, the mounted position of said annular cutting blade 54 being such that a tangent to said perimeter coincides with an extension of said rotating axis of said main body,
• means for engaging said annular cutting blade into a rotation against said solid element,
• said cutting means dislodging said materials along said perimeter and along said tangent in the direction of said rotating axis, so that any torsional movement of 1 degree of said main body 22 around said rotating axis causes the same torsional movement of 1 degree at said perimeter of said annular cutting blade,
• said cutting means having a diameter and a thickness, wherein said diameter comprising an outside diameter at said outer edge and an inside diameter at said inner edge, said flat faces having a width corresponding to half of the difference between said inside diameter being no less than 75% of said outside diameter and no more than 97% of said outside diameter, said thickness relative to said diameter being in a ratio varying from 0.5 to 1 000, to 3 to 1 000.

A flexible drive cable operated saw machine for cutting materials through a solid element, said drive cable operated saw machine comprising in combination:

• a main body 22 having a force end and a aft end, a rotating axis 72 and being capable of being oriented about said rotating axis,
• an annular cutting blade 54 comprising an outer edge, a first flat face and a second flat face opposite to said first flat face and an inner edge, said outer edge comprising cutting means disposed along the perimeter thereof, said annular cutting blade 54 being mounted on said force end of said main body,
• wherein said annular cutting blade is engaged into rotation against said solid element by a command wheel centrally mounted on said drive cable and peripherally exerting a friction drive against said first flat face, said drive cable also engaging a command gear meshing with a follower gear of identical diameter, said follower gear driving a follower wheel acting on said second flat face of said annular cutting blade 54 in transverse register with said command wheel relative to said cutting blade,
• said cutting means having a diameter and a thickness, wherein said diameter comprising an outside diameter at said outer edge and an inside diameter at said inner edge, said flat faces having a width corresponding to half of the difference between said inside diameter being no less than 75% of said outside diameter and no more tan 97% of said outside diameter, said thickness relative to said diameter being in a ratio varying from 0.5 to 1 000, to 3 to 1 000.