US3881838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill attachment
Assignee: Jacobs Chuck Technology Corp
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Filing: 1973-10-25
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Granted: 1975-05-06
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Expires: 1993-10-25
Abstract
Abstract An attachment to be fitted to a drill bit for preventing during overhead drilling falling dust from droopping into the chuck or upon the operator, comprising an annular disc having a central hole through which the drill passes and provided with a flexible support which grips the shank of the bit.
Inventors
- 👤 George C Derbyshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:32
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/001; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0053; Y; Y10; Y10T; Y10T408/00; Y10T408/50; Y10T408/96; Y10T408/98
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
232 words
A device removably attachable to the shank of a drill bit carried by a chuck of a rotary tool and serving to catch and thereby guard against dust and swarf falling upon the chuck or upon the operator when using the tool in an overhead drilling operation, the device comprising a circular container having a bottom wall, a side wall, a circumferential lip offset radially inward from the top end of the side wall forming a cavern with said bottom and side walls to receive and retain said dust and swarf being swept therein by centrifugal force during said overhead drilling operation and said lip defining an opening in the top end of the container for receiving said dust and swarf, and a bush of flexible resilient material forming a portion of the bottom wall and extending upwardly in the container, the bush having an axially extending hole therethrough of slightly less diameter than the shank of the drill bit with which the device is to be used enabling fitting of the bush upon the shank of the drill bit in gripping relation to the latter, the opening in the top of the container being of a greater diameter than the outer diameter of the bush, and the axial dimension of the container being substantially less than the extent of axial projection of the shank of the drill bit from the chuck.
Claim 2
Independent Claim
232 words
A device removably attachable to the shank of a drill bit carried by a chuck of a rotary tool and serving to catch and thereby guard against dust and swarf falling upon the chuck or upon the operator when using the tool in an overhead drilling operation, the device comprising a circular container having a bottom wall, a side wall, a circumferential lip offset radially inward from the top end of the side wall forming a cavern with said bottom and side walls to receive and retain said dust and swarf being swept therein by centrifugal force during said overhead drilling operation and said lip defining an opening in the top end of the container for receiving said dust and swarf, and a bush of flexible resilient material forming a portion of the bottom wall and extending upwardly in the container, the bush having an axially extending hole therethrough of slightly less diameter than the shank of the drill bit with which the device is to be used enabling fitting of the bush upon the shank of the drill bit in gripping relation to the latter, the opening in the top of the container being of a greater diameter than the outer diameter of the bush, and the axial dimension of the container being substantially less than the extent of axial projection of the shank of the drill bit from the chuck.
Claim 3
Dependent Claim
33 words
A device as in claim 1, wherein the outer diameter of the side wall of the container is greater than that of the chuck of the tool with which the device is used.
Claim 4
Dependent Claim
19 words
A device as in claim 2, wherein the outer diameter of the bush progressively decreases in an upward direction.
Claim 5
Dependent Claim
23 words
A device as in claim 1, wherein the bush is replaceable with a bush having an axially extending hole of a different diameter.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |