Sleeved stop for a drill bit
First Claim
1. A stop for a drill bit, said drill bit having an elongate body rotatable about an axis, a tip at one end of said body for drilling into a surface, a second end of said body opposed to said tip for coupling said bit to a drill, and an engagement region on the exterior of said body between said tip and said second end, said stop comprising:
- a first sleeve for adjusting a position of said stop relative to said tip of said drill bit, said first sleeve having a first thread adapted to engage said engagement region on said drill bit, and a second thread having a pitch different from that of said first thread, said first sleeve being rotatably mounted to said drill bit about said engagement region, said first sleeve providing one of fine adjustment and coarse adjustment of said position of said stop with respect to said drill bit tip; and
a second sleeve concentrically coupled to said first sleeve for adjusting said position of said stop relative to said tip of said drill bit, said second sleeve having a thread adapted to engage said second thread of said first sleeve, said second sleeve being rotatably mounted to said first sleeve, said second sleeve also providing the other of fine adjustment and coarse adjustment of said position of said stop;
a centering member for centering said drill bit in a predetermined drilling location in said surface, said centering member being retractably mounted to said drill bit and projecting from said drill bit towards said surface, said centering member including a forward end;
a resilient member disposed within said centering member, to bias said centering member towards a fully extended position in which said forward end of said centering member extends past said tip of said drill bit; and
a shoulder, mounted on one of said second sleeve or said centering member, for limiting a depth of penetration of said drill bit into said surface.
2 Assignments
0 Petitions
Accused Products
Abstract
A stop for use with an electric drill bit, the stop having at least one threaded sleeve for positioning the stop relative to a surface into which the drill bit will extend. The stop may have both an inner and an outer sleeve. The sleeves are mounted coaxially, one inside the other about the drill bit. One of the sleeves, preferably the inner sleeve, provides coarse adjustment of the position of the shoulder relative to the tip of the bit, while the other, preferably the outer sleeve, provides fine adjustment of the position of the shoulder relative to the top of the bit.
321 Citations
7 Claims
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1. A stop for a drill bit, said drill bit having an elongate body rotatable about an axis, a tip at one end of said body for drilling into a surface, a second end of said body opposed to said tip for coupling said bit to a drill, and an engagement region on the exterior of said body between said tip and said second end, said stop comprising:
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a first sleeve for adjusting a position of said stop relative to said tip of said drill bit, said first sleeve having a first thread adapted to engage said engagement region on said drill bit, and a second thread having a pitch different from that of said first thread, said first sleeve being rotatably mounted to said drill bit about said engagement region, said first sleeve providing one of fine adjustment and coarse adjustment of said position of said stop with respect to said drill bit tip; and a second sleeve concentrically coupled to said first sleeve for adjusting said position of said stop relative to said tip of said drill bit, said second sleeve having a thread adapted to engage said second thread of said first sleeve, said second sleeve being rotatably mounted to said first sleeve, said second sleeve also providing the other of fine adjustment and coarse adjustment of said position of said stop; a centering member for centering said drill bit in a predetermined drilling location in said surface, said centering member being retractably mounted to said drill bit and projecting from said drill bit towards said surface, said centering member including a forward end; a resilient member disposed within said centering member, to bias said centering member towards a fully extended position in which said forward end of said centering member extends past said tip of said drill bit; and a shoulder, mounted on one of said second sleeve or said centering member, for limiting a depth of penetration of said drill bit into said surface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification