ROOFMATES SHINGLE KNIFE
In one embodiment of the present invention, SHINGLE KNIFE™, comprises a pneumatically powered miniaturized reciprocating or circular saw designed especially for roofing applications. In an alternative embodiment, SHINGLE KNIFE™ may be powered by rechargeable battery packs or the like. SHINGLE KNIFE™ is roughly size and shape of a Prior Art razor knife, but may be powered and provided with a depth gauge to prevent cutting through roofing underlayment or the like. In another embodiment of the present invention, the SHINGLE KNIFE™ may be provided for cutting sheetrock. A reciprocating, sharpened hook shaped blade pulls though the sheetrock, making a clean cut with little or no powdery debris. The SHINGLE KNIFE for sheetrock may be air or battery powered.
1 . An electric saw for cutting shingles, comprising:
a rechargeable battery;
an electric motor, coupled to and receiving power from the rechargeable battery;
a transmission for converting rotary motion from the electric motor to reciprocating motion; and
a cutting blade coupled to the transmission, the cutting blade having at least one hook shaped portion for cutting through shingles when reciprocated.
2 . The electric saw of claim 1 wherein the cutting blade has a plurality of hook shaped portions of equal length.
3 . The electric saw of claim 1 wherein the cutting blade has a plurality of hook shaped portions of different lengths.
4 . The electric saw of claim 1 , wherein the cutting blade pulls up though the shingles to cut the shingles.
5 . The electric saw of claim 1 , wherein the at least one hook has a carbide tip.
6 . A pneumatic saw for cutting shingles, comprising:
an air inlet for receiving compressed air;
a pneumatic motor, coupled to and receiving compressed air from the air inlet;
a transmission for converting rotary motion from the pneumatic motor to reciprocating motion; and
a cutting blade coupled to the transmission, the cutting blade having at least one hook shaped portion for cutting through shingles when reciprocated.
7 . The pneumatic saw of claim 6 wherein the cutting blade has a plurality of hook shaped portions of equal length.
8 . The pneumatic saw of claim 6 wherein the cutting blade has a plurality of hook shaped portions of different lengths.
9 . The pneumatic saw of claim 6 , wherein the cutting blade pulls up though the shingles to cut the shingles.
10 . The pneumatic saw of claim 5 , wherein the at least one hook has a carbide tip.