Patent US4462728A successfully refreshed from Google Patents.
US4462728A
Expired / Lapsed
US
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Accessory for electric drill
Assignee: Individual
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Filing: 1982-11-18
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Granted: 1984-07-31
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Expires: 2002-11-18
Abstract
Abstract Elongated handle having a threaded spindle for engagement with a threaded aperture in the side of the body of an electric drill and a gear mounted on the same end of the handle for engagement with the geared chuck used with the drill.
Inventors
- 👤 Frank Sturgis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:23
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/001; B23B45/006; Y; Y10; Y10T; Y10T279/00; Y10T279/34; Y10T279/3431; Y10T408/00; Y10T408/96
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
Accessory for electric drill, comprising: (a) an elongated handle, (b) a threaded spindle extending from one end of the handle for removable engagement with a threaded aperture in the side of the body of the drill, and (c) a gear mounted on the end of the handle for engagement with a geared chuck mounted on the drill, the spindle extending axially a substantial distance beyond the gear.
Claim 2
Dependent Claim
67 words
Accessory for electric drill, comprising: (a) an elongated handle, (b) a threaded spindle extending from one end of the handle for removable engagement with a threaded aperture in the side of the body of the drill, and (c) a gear mounted on the end of the handle for engagement with a geared chuck mounted on the drill, the spindle extending axially a substantial distance beyond the gear.
Claim 3
Dependent Claim
20 words
Accessory as recited in claim 1, wherein the gear has a frusto-conical shape and is concentric with the threaded spindle.
Claim 4
Dependent Claim
47 words
Accessory as recited in claim 1, wherein the threaded aperture in the body of the drill is selected so that not only does the threaded spindle engage it to hold the handle rigidly, but the threaded spindle also fits snugly in the lateral bore of the chuck.
Claim 5
Dependent Claim
37 words
Accessory as recited in claim 1, wherein the diameters of the threaded aperture in the drill body and the lateral bore of the chuck are the same, so that the spindle fits snugly in both of them.
Claim 6
Dependent Claim
69 words
Accessory as recited in claim 1, wherein the handle is of elongated, generally frusto-conical shape, wherein the handle has a threaded bore in the said one end to receive the threaded spindle, wherein a large counterbore enters the other end of the handle for most of its length, and wherein the threaded spindle has a non-circular head that lies in the bottom of the counterbore and is locked therein.
Claim 7
Dependent Claim
20 words
Accessory as recited in claim 5, wherein the handle, the threaded spindle, and the gear are all locked together tightly.
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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |