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US 4,227,840 AGranted
Drilling attachment for chain saw
OwnerClovis Thiviergeinventor
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OwnerClovis Thiviergeinventor
Estimating the term…
A drilling attachment adapted to be fixed to a chain saw and a chain saw so equipped wherein the driving output shaft and a drill chuck are advantageously connected by a pair of friction drive wheels to produce clockwise rotation of the drill chuck and thus allow the use of standard and less expensive clockwise drills, to automatically provide for relative slipping without using a slip clutch, to produce the desired speed reduction, and to allow trouble and failure-free operation in the field, such as to drill holes in maple trees to collect the sap thereof. This drilling attachment includes a first friction drive wheel and a second friction drive wheel frictionally engaging each other with the second friction drive wheel rotatively carried by a bracket adjustably securable to the chain saw. A drill chuck is fixedly connected to the second friction drive wheel for bodily rotation clockwise therewith.
For a chain saw having a driving output shaft and a cutter bar connection device adjacent the driving output shaft, the invention comprising a drilling attachment including a first friction drive wheel securable on said driving output shaft for bodily rotation therewith, a mounting bracket rigidly securable to said cutter bar connection device, a second friction drive wheel rotatively carried by said mounting bracket and operatively frictionally engaging said first friction drive wheel and driven by the latter, and a drill chuck fixedly connected to the second friction drive wheel and bodily rotating with the latter in response to rotation of the first friction drive wheel in operative engagement with the second friction drive wheel.
A converted chain saw comprising a driving output shaft, a pair of laterally spaced-apart stud bolts projecting endwise on one side of the chain saw adjacent and parallel to the driving output shaft, a first friction drive wheel securable on said driving output shaft for bodily rotation therewith, a mounting bracket rigidly securable to said stud bolts, a second friction drive wheel rotatively carried by said mounting bracket and operatively frictionally engaging said first friction drive wheel and driven by the latter, and a drill chuck fixedly connected to the second friction drive wheel and bodily rotating with the latter in response to rotation of the first friction drive wheel in operative engagement with the second friction drive wheel.
Dependencies are inferred from the claim text.