Patent US4251171A successfully refreshed from Google Patents.
US4251171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling accessory
Assignee: Individual
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Filing: 1978-07-27
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Granted: 1981-02-17
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Expires: 1998-07-27
Abstract
Abstract A drilling accessory for collecting dust and other debris when drilling a hole in a workpiece. The accessory having a handle for hand holding the device and a hollow open ended dust collector attached to the handle. One end of the dust collector is provided with a split rubber cover spanning the interior of the dust collector through which cover a drill bit may be inserted to engage the workpiece to be drilled. When a forward end of the dust collector is placed adjacent the workpiece to be drilled, and drilling commenced, dust and other debris resulting from drilling will be collected and held inside the dust collector.
Inventors
- 👤 Colin E. P. Brett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:22
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0053; Y; Y10; Y10T; Y10T408/00; Y10T408/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
190 words
A portable drilling accessory for use with a hand held drill when drilling a hole in a workpiece comprising: a handle; a hollow dust collector mounted to the handle and having an open forward end and an open rearward end aligned with the forward end, the forward end being positionable in abutting relation with the workpiece; a cover having an opening therein through which a drill bit may be inserted to engage the workpiece, the cover being mounted to span the interior of the hollow dust collector in spaced apart relation with the forward end, said cover comprising multiple layers of flexible material and the opening comprising a centrally located star cut in each layer which is offset from the star cut in an adjacent layer; whereby when the forward end is placed in abutting relation with the workpiece to be drilled and a drill bit inserted through the rearward end of the hollow dust collector, the opening in the cover and the forward end to engage the workpiece and drilling commenced, dust will be collected in the interior of the hollow dust collector between the cover and the workpiece.
Claim 2
Dependent Claim
190 words
A portable drilling accessory for use with a hand held drill when drilling a hole in a workpiece comprising: a handle; a hollow dust collector mounted to the handle and having an open forward end and an open rearward end aligned with the forward end, the forward end being positionable in abutting relation with the workpiece; a cover having an opening therein through which a drill bit may be inserted to engage the workpiece, the cover being mounted to span the interior of the hollow dust collector in spaced apart relation with the forward end, said cover comprising multiple layers of flexible material and the opening comprising a centrally located star cut in each layer which is offset from the star cut in an adjacent layer; whereby when the forward end is placed in abutting relation with the workpiece to be drilled and a drill bit inserted through the rearward end of the hollow dust collector, the opening in the cover and the forward end to engage the workpiece and drilling commenced, dust will be collected in the interior of the hollow dust collector between the cover and the workpiece.
Claim 3
Dependent Claim
275 words
A drilling accessory for use with a drill when drilling a hole in a workpiece comprising: a handle having two transverse bores longitudinally aligned and in communication with one another, one bore having a larger diameter than the other whereby a step is formed where the two bores are joined; a disc shaped cover having an opening therein through which a drill bit may be inserted to engage the workpiece, the cover having a diameter smaller than the bore of larger diameter and larger than the bore of smaller diameter, the cover being placed on the step between the larger bore and the smaller bore in the handle; a hollow cylindrical dust collector having an open forward end and an open rearward end, the hollow cylindrical dust collector having an outside diameter smaller than the bore of larger diameter but larger than the bore of smaller diameter and having the rearward end mounted in the bore of larger diameter in the handle whereby the hollow cylindrical dust collector is mounted transversely to the handle, the rearward end of the hollow cylindrical dust collector being positioned to hold the cover between the rearward end and the step and the forward end of the hollow cylindrical dust collector being positionable in abutting relation with the workpiece to be drilled; whereby when the forward end of the hollow cylindrical dust collector is positioned adjacent the workpiece and a drill bit is inserted through the opening in the cover and through the hollow cylindrical dust collector to engage the workpiece and drilling commenced, dust will be collected within the hollow cylindrical dust collector between the cover and the workpiece.
Claim 4
Dependent Claim
275 words
A drilling accessory for use with a drill when drilling a hole in a workpiece comprising: a handle having two transverse bores longitudinally aligned and in communication with one another, one bore having a larger diameter than the other whereby a step is formed where the two bores are joined; a disc shaped cover having an opening therein through which a drill bit may be inserted to engage the workpiece, the cover having a diameter smaller than the bore of larger diameter and larger than the bore of smaller diameter, the cover being placed on the step between the larger bore and the smaller bore in the handle; a hollow cylindrical dust collector having an open forward end and an open rearward end, the hollow cylindrical dust collector having an outside diameter smaller than the bore of larger diameter but larger than the bore of smaller diameter and having the rearward end mounted in the bore of larger diameter in the handle whereby the hollow cylindrical dust collector is mounted transversely to the handle, the rearward end of the hollow cylindrical dust collector being positioned to hold the cover between the rearward end and the step and the forward end of the hollow cylindrical dust collector being positionable in abutting relation with the workpiece to be drilled; whereby when the forward end of the hollow cylindrical dust collector is positioned adjacent the workpiece and a drill bit is inserted through the opening in the cover and through the hollow cylindrical dust collector to engage the workpiece and drilling commenced, dust will be collected within the hollow cylindrical dust collector between the cover and the workpiece.
Claim 5
Dependent Claim
25 words
The drilling accessory according to claim 2 wherein the cover is constructed of flexible material and wherein the opening comprises a centrally located star cut.
Claim 6
Dependent Claim
39 words
The drilling accessory according to claim 2 wherein the cover comprises multiple layers of flexible material and the opening comprises a centrally located star cut in each layer which is offset from the star cut in an adjacent layer.
Claim 7
Dependent Claim
18 words
The drilling accessory according to claim 2 wherein the hollow cylindrical dust collector is constructed of transparent material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |