Patent US2554001A successfully refreshed from Google Patents.
US4078869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way right angle drill
Assignee: Individual
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Filing: 1977-01-17
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Granted: 1978-03-14
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Expires: 1997-01-17
Abstract
Abstract A portable, hand-held drill, or an attachment therefor, comprising an assembly of parts for generating focused beams of light to be directed alongside the drill bit, whereby the positions of the light spots projected on the work surface serve as indicia of the angle between the drill bit and the work surface. In a preferred embodiment, the light beams are generated 90° apart along the circumference of a circle concentric with the bit, and normal thereto, such that perpendicularity of the bit is indicated by positioning the light spots at equal distances from the bit. It is also preferred to include means for adjusting the beam angle, such that the projections on the work surface can be located at the same distance from the tip of a short drill bit as from the tip of a long bit.
Inventors
- 👤 Damon P. Honeycutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
B; B25; B25F; B25F5/00; B25F5/02; B25F5/021; B25H; B25H1/00; B25H1/0021; B25H1/0078; B25H1/0092; Y; Y10; Y10T; Y10T408/00; Y10T408/21
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
An attachment for a portable, hand-held drill comprising: (a) a screw-threaded collar adapted for concentric attachment to a portion of the drill chuck, said collar including a tapered keyway at each of two locations spaced apart by a 90° angle; (b) a first source of light in one of said keyways, in combination with means for focusing a first beam of light a preselected distance from a drill bit tip; (c) a second source of light in the other of said keyways, in combination with means for focusing a second beam of light said preselected distance from a drill bit tip, and spaced from said first beam 90° along the circumference of a circle concentric with the drill shaft.
Claim 2
Dependent Claim
119 words
An attachment for a portable, hand-held drill comprising: (a) a screw-threaded collar adapted for concentric attachment to a portion of the drill chuck, said collar including a tapered keyway at each of two locations spaced apart by a 90° angle; (b) a first source of light in one of said keyways, in combination with means for focusing a first beam of light a preselected distance from a drill bit tip; (c) a second source of light in the other of said keyways, in combination with means for focusing a second beam of light said preselected distance from a drill bit tip, and spaced from said first beam 90° along the circumference of a circle concentric with the drill shaft.
Claim 3
Dependent Claim
33 words
An attachment as in claim 1 wherein each of said focusing means includes a base member shaped to fit in one of said keyways, and having screw threads to bridge the collar threads.
Claim 4
Dependent Claim
23 words
An attachment as in claim 2 wherein said focusing means also includes a screw-threaded ring surrounding said collar and engaging said base members.
Claim 5
Dependent Claim
26 words
An attachment as in claim 3 wherein each of said base members includes a central bore wherein said first and second light sources are located, respectively.
Claim 6
Dependent Claim
21 words
An attachment as in claim 4 wherein a light reflector and focusing lens are also located in each of said bores.
Claim 7
Dependent Claim
27 words
An attachment as in claim 5 wherein an insert collar is located at one end of each said bore for retaining the light source assembly in place.
Claim 8
Dependent Claim
124 words
A drill comprising: (a) a housing; (b) a drill chuck and motor mounted in combination with said housing; (c) a screw-threaded collar concentrically mounted on said chuck, said collar including a tapered keyway at each of two locations spaced apart by a 90° angle; (d) a first source of light in one of said keyways, in combination with means for focusing a first beam of light a preselected distance from a drill bit tip; and (e) a second source of light in the other of said keyways, in combination with means for focusing a second beam of light said preselected distance from a drill bit tip, and spaced from said first beam 90° along the circumference of a circle concentric with the drill shaft.
Claim 9
Dependent Claim
124 words
A drill comprising: (a) a housing; (b) a drill chuck and motor mounted in combination with said housing; (c) a screw-threaded collar concentrically mounted on said chuck, said collar including a tapered keyway at each of two locations spaced apart by a 90° angle; (d) a first source of light in one of said keyways, in combination with means for focusing a first beam of light a preselected distance from a drill bit tip; and (e) a second source of light in the other of said keyways, in combination with means for focusing a second beam of light said preselected distance from a drill bit tip, and spaced from said first beam 90° along the circumference of a circle concentric with the drill shaft.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |