Drilling guide and measuring instrumentation
First Claim
1. A measuring device for measuring penetration depth of a drilling tool being held in a chuck, the device comprising:
- a workpiece-abutment member having a workpiece-abutment end adapted for abutting a workpiece and having a first aperture configured for receiving a protruding portion of the tool that protrudes from the chuck, the protruding portion having a preselected protruding length;
a chuck-abutment member being collapsibly associated with said workpiece-abutment member and having a chuck-abutting end adapted for abutting the chuck and having a second aperture adapted to axially receive the protruding portion of the tool, said abutment members having a variable combined length that is adjustable up to substantially the protruding length; and
a frictional member associated with one of said abutment members and biased against another of said abutment members for increasing friction therebetween sufficiently for maintaining the abutment members in a selected collapsed position during withdrawal of the protruding portion of the tool from the abutment members;
wherein the penetration depth is determinable by a change in the combined length as the tool is drilled into the workpiece axially through the device and as the chuck collapses said abutment members to the collapsed position.
1 Assignment
0 Petitions
Accused Products
Abstract
A surgical drilling guide for guiding a drilling tool, measuring its penetration depth, and protecting surrounding tissue. The guide has a sleeve and a plunger that telescopes within the sleeve. The plunger and the sleeve have axial bores adapted to slidably receive a portion of the tool that protrudes beyond a drill chuck. The extended length of the drilling guide is substantially as long as the length of the protruding portion of the tool, and a maximum extended length of the guide is preferably as long as the protruding portion. As the tool in drilled into a workpiece, the chuck collapses the drilling guide. Gradations on the side of the guide indicate workpiece-penetration depth.
307 Citations
24 Claims
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1. A measuring device for measuring penetration depth of a drilling tool being held in a chuck, the device comprising:
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a workpiece-abutment member having a workpiece-abutment end adapted for abutting a workpiece and having a first aperture configured for receiving a protruding portion of the tool that protrudes from the chuck, the protruding portion having a preselected protruding length; a chuck-abutment member being collapsibly associated with said workpiece-abutment member and having a chuck-abutting end adapted for abutting the chuck and having a second aperture adapted to axially receive the protruding portion of the tool, said abutment members having a variable combined length that is adjustable up to substantially the protruding length; and a frictional member associated with one of said abutment members and biased against another of said abutment members for increasing friction therebetween sufficiently for maintaining the abutment members in a selected collapsed position during withdrawal of the protruding portion of the tool from the abutment members; wherein the penetration depth is determinable by a change in the combined length as the tool is drilled into the workpiece axially through the device and as the chuck collapses said abutment members to the collapsed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A handheld drilling-guide for measuring penetration depth of drilling tool being held in a chuck, the drilling guide comprising:
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a sleeve; a plunger being telescopically disposed within said sleeve and having an axial bore adapted to slidably receive and guide a portion of the tool that protrudes from the chuck having a preselected protruding length, and said plunger and said sleeve having a variable combined length being adjustable up to substantially the protruding length; and a resilient member attached to one of the plunger and the sleeve and being radially biased by the other of the plunger and the sleeve for increasing friction between said sleeve and said plunger sufficiently for maintaining the abutment members in a selected collapsed position during withdrawal of the protruding portion of the tool from the abutment members; wherein the penetration depth is determinable by a change in the combined length when the tool is drilled into a workpiece axially through the guide and the chuck telescopically collapses said plunger into said sleeve to the collapsed position. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. Instrumentation for measuring penetration depth of a drilling tool held in a chuck, the instrumentation comprising:
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a drilling tool having indicia for aligning with a portion of the chuck for preselecting a protruding length of a protruding portion of the tool protruding from said chuck; and measuring guide having a workpiece-abutment member and a chuck-abutment member, the workpiece-abutment member having an end adapted for abutting a workpiece and an aperture adapted to axially receive and guide said protruding portion, the chuck-abutment member being collapsibly associated with said workpiece-abutment member and having an end adapted for abutting the chuck and an aperture adapted to axially receive and guide the protruding portion, wherein the guide includes a stop; wherein said abutment members have a variable combined length, and the stop is associated with the abutment members for limiting extension of the combined length up to substantially the protruding length, the penetration depth being determinable by a change in the combined length as the tool is drilled into the workpiece axially through the device and as the chuck collapses said abutment members. - View Dependent Claims (22, 23)
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24. A method of measuring the penetration depth of a drilling tool held in a chuck, the method comprising:
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securing a drilling tool in a chuck such that a protruding portion of the drilling tool having a preselected protruding length protrudes from the chuck; inserting said protruding portion into a collapsible drilling guide; extending the drilling guide to substantially the length of the protruding portion; placing the drilling guide against a workpiece; drilling the tool into the workpiece and concurrently collapsing the drilling guide with the chuck; and determining the depth of tool penetration into the workpiece by a change in length of the drilling guide.
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Specification