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US 2011/0033257 A1Published application
Hole saw with tapered pilot bit
OwnerWilbur Keith Moffattinventor
Life of this patent
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Abstract
The present invention provides a hole saw and pilot bit assembly. The pilot bit of the assembly has a portion which is devoid of flute and lobes and a portion including flutes and lobes. The portion including flutes and lobes further includes a portion which is tapered.
Claims10
A pilot bit comprising:
- a shank including a first portion having a proximal end and a distal end, a second portion having a proximal end and a distal end, said second portion extending from said distal end of said first portion, and a third portion having a proximal end and a tip, said third portion extending from said distal end of said second portion;
- wherein said first portion is devoid of flutes and devoid of lobes;
- wherein the outermost diameter of said second portion is consistent from said proximal end to said distal end thereof;
- and
- wherein the outermost diameter of said third portion tapers inwardly along a length of the third portion from the proximal end to the tip.
2 more elements
A hole saw and pilot bit combination comprising:
- a hole saw having a back plate, a skirt depending from said back plate, and a cutting edge at a distal end of said skirt;
- and
- a pilot bit comprising;
- a shank including a first portion having a proximal end and a distal end, a second portion having a proximal end and a distal end, said second portion extending from said distal end of said first portion, and a third portion having a proximal end and a tip, said third portion extending from said distal end of said second portion;
- wherein said first portion is devoid of flutes and devoid of lobes,
- wherein the outermost diameter of said second portion is consistent from said proximal end to said distal end thereof;
- and
- wherein the outermost diameter of said third portion tapers inwardly along a length of said third portion from the proximal end to the tip.
5 more elements
Dependencies are inferred from the claim text.