US3864839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional guide for power hand drill
Assignee: Individual
•
Filing: 1973-06-14
•
Granted: 1975-02-11
•
Expires: 1993-06-14
Abstract
Abstract A power hand drill is provided with a device for assisting its operator in accurately positioning its bit horizontally for drilling vertical surfaces and vertically for drilling horizontal surfaces. The positioning-assisting device comprises a circular bubble type level mounted for selective securement to surfaces of the drill housing parallel and normal respectively to the drill axis.
Inventors
- 👤 Lloyd J Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0078; B25H1/0085; G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/26; G01C9/28; G01C9/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
The combination including a power hand drill having a housing with its top wall generally parallel to the drill axis and its near end wall generally normal to the drill axis, a spirit level of the circular bubble type, and means for selectively securing said level to said drill parallel to and normal to the drill axis said selective securing means comprising a plate mounting said spirit level to form a low-profile assembly and a pair of slots along each of the top and rear end walls of said housing parallel to and normal to the drill axis respectively for alternately slidably receiving opposite edges of said plate.
Claim 2
Dependent Claim
108 words
The combination including a power hand drill having a housing with its top wall generally parallel to the drill axis and its near end wall generally normal to the drill axis, a spirit level of the circular bubble type, and means for selectively securing said level to said drill parallel to and normal to the drill axis said selective securing means comprising a plate mounting said spirit level to form a low-profile assembly and a pair of slots along each of the top and rear end walls of said housing parallel to and normal to the drill axis respectively for alternately slidably receiving opposite edges of said plate.
Claim 3
Dependent Claim
23 words
The combination according to claim 1 wherein said slots are formed with undercut sides matingly engageable with the side edges of said plate.
Claim 4
Dependent Claim
21 words
The combination according to claim 2 wherein said plate is formed with an upstanding finger-grip tab on one of its ends.
References Cited (Backward Citations)
US2877561A
Cited
US3664032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |