US4240771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breast drills
Assignee: Jacobs Manufacturing Co Ltd
•
Filing: 1978-11-28
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Granted: 1980-12-23
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Expires: 1998-11-28
Abstract
Abstract A breast drill including a casing of elongate hollow form containing gearing for transmitting drive to a drill chuck, and a grip handle connected to the casing and capable of angular adjustment around the casing so that it can be located at a required position in relation to the position of a crank handle which can be turned to transmit drive to the chuck.
Inventors
- 👤 George C. Derbyshire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:07
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/06; B23B45/001; B25; B25F; B25F5/00; B25F5/02; B25F5/029; Y; Y10; Y10S; Y10S408/00; Y10S408/712; Y10T; Y10T408/00; Y10T408/65; Y10T408/96
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
In a breast drill, a casing of elongate hollow form containing gearing for transmitting drive to a drill chuck, a crank handle which can be turned to transmit drive to the drill chuck, a pistol grip handle connected to the casing and being capable of angular adjustment around said casing so that it can be located at a required position in relation to the position of the crank handle, and a sleeve-like extension rotatably mounted on the end of the casing remote from the drill chuck and the pistol grip handle is formed integrally with said extension.
Claim 2
Dependent Claim
97 words
In a breast drill, a casing of elongate hollow form containing gearing for transmitting drive to a drill chuck, a crank handle which can be turned to transmit drive to the drill chuck, a pistol grip handle connected to the casing and being capable of angular adjustment around said casing so that it can be located at a required position in relation to the position of the crank handle, and a sleeve-like extension rotatably mounted on the end of the casing remote from the drill chuck and the pistol grip handle is formed integrally with said extension.
Claim 3
Dependent Claim
37 words
A breast drill according to claim 1, in which the sleeve-like extension is rotatably mounted on the end of the casing remote from the drill chuck and the pistol grip handle is removably connected to said extension.
Claim 4
Dependent Claim
27 words
A breast drill according to claim 2, in which the pistol grip handle is removably connected to the sleeve-like extension by having dovetail and slot connection therewith.
Claim 5
Dependent Claim
42 words
A breast drill according to claim 1, in which the sleeve-like extension is provided with an end cap into holes in which a selection of drill bits and the chuck key can be plugged so as to be contained within the extension.
References Cited (Backward Citations)
US913172A
Cited
US1251133A
Cited
US2474726A
Cited
FR940285A
Cited
DE2000306A1
Cited
DE2462119A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |