US3661469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill guide
Assignee: AJEM ASSOCIATES Inc
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Filing: 1970-06-15
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Granted: 1972-05-09
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Expires: 1990-06-15
Abstract
Abstract Drill guide bushing supported on legs with inner surfaces defining angle bisected by longitudinal axis of bushing and with flat coplanar bottoms in plane perpendicular to longitudinal axis of bushing. Scribe line on apparatus bisecting sand angle permits visual alignment of bushing with one of two mutually perpendicular center lines on surface to be drilled. Selected edges of legs lie in same plane as longitudinal axis of bushing and permit visual alignment of bushing with other center line. When drilling in flat surface, flat bottoms of legs contact surface. When drilling in curved surface, inner surfaces of legs tangentially contact surface.
Inventors
- 👤 Millard Leff
- 👤 Joseph Daniel Malazinsky
- 👤 Earl Howard Weigel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:23
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; B23B47/281; B23B2247/00; B23B2247/18; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/96
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
393 words
Apparatus for guiding a rotatable drill perpendicular to a flat or selectively to a curved surface thereby to drill a perpendicular hole in said surface at a location fixed by the intersection of two mutually perpendicular center lines marked on the said surface, said apparatus comprising: a. an elongated member having a recess extending therethrough, b. a guide bushing removably secured in said recess, said guide bushing having an aperture extending therethrough and adapted to receive and guide a rotatable drill, c. a first pair of legs secured to said elongated member adjacent said guide bushing, the said legs having facing inner surfaces defining an angle bisected by the longitudinal axis of the aperture in said guide bushing, d. a second pair of legs secured to said elongated member and spaced from said first pair of legs, the legs of said second pair having facing inner surfaces registering with the facing inner surfaces of the legs of said first pair and thereby defining the same angle as the angle defined by the facing inner surfaces of the legs of said first pair, e. the bottoms of all of said legs lying in a common plane perpendicular to the longitudinal axis of the aperture of the guide bushing, f. a scribed line on said apparatus at the intersection of said first pair of legs, said scribed line bisecting the angle defined by the facing inner surfaces of said first pair of legs and adapted to index the apparatus over one of said center lines, g. an edge of one of said first pair of legs, an edge of the other of said first pair of legs, and the longitudinal axis of the aperture of the guide bushing all lying in the same plane which plane is perpendicular to the plane defined by the scribed line and the longitudinal axis of the aperture of the guide bushing, said edges being adapted to be aligned to index the apparatus over the other of said center lines, h. the bottoms of all of said legs being adapted to contact a flat surface when the rotatable drill is to drill a hole in said flat surface, i. the facing inner surfaces of all of said legs being adapted to tangentially contact a curved surface when the rotatable drill is to drill a hole perpendicularly in said curved surface.
Claim 2
Dependent Claim
393 words
Apparatus for guiding a rotatable drill perpendicular to a flat or selectively to a curved surface thereby to drill a perpendicular hole in said surface at a location fixed by the intersection of two mutually perpendicular center lines marked on the said surface, said apparatus comprising: a. an elongated member having a recess extending therethrough, b. a guide bushing removably secured in said recess, said guide bushing having an aperture extending therethrough and adapted to receive and guide a rotatable drill, c. a first pair of legs secured to said elongated member adjacent said guide bushing, the said legs having facing inner surfaces defining an angle bisected by the longitudinal axis of the aperture in said guide bushing, d. a second pair of legs secured to said elongated member and spaced from said first pair of legs, the legs of said second pair having facing inner surfaces registering with the facing inner surfaces of the legs of said first pair and thereby defining the same angle as the angle defined by the facing inner surfaces of the legs of said first pair, e. the bottoms of all of said legs lying in a common plane perpendicular to the longitudinal axis of the aperture of the guide bushing, f. a scribed line on said apparatus at the intersection of said first pair of legs, said scribed line bisecting the angle defined by the facing inner surfaces of said first pair of legs and adapted to index the apparatus over one of said center lines, g. an edge of one of said first pair of legs, an edge of the other of said first pair of legs, and the longitudinal axis of the aperture of the guide bushing all lying in the same plane which plane is perpendicular to the plane defined by the scribed line and the longitudinal axis of the aperture of the guide bushing, said edges being adapted to be aligned to index the apparatus over the other of said center lines, h. the bottoms of all of said legs being adapted to contact a flat surface when the rotatable drill is to drill a hole in said flat surface, i. the facing inner surfaces of all of said legs being adapted to tangentially contact a curved surface when the rotatable drill is to drill a hole perpendicularly in said curved surface.
Claim 3
Dependent Claim
67 words
Apparatus as in claim 1, wherein: j. the legs of said first pair of legs are staggered relative to each other, the forward edge of one leg relative to one end of the apparatus and the rear edge of the other leg relative to said one end of the apparatus and the longitudinal axis of the aperture of the guide bushing all lying in the same plane.
Claim 4
Dependent Claim
289 words
Apparatus for guiding a rotatable drill perpendicular to a flat or selectively to a curved surface, said apparatus comprising: a. sleeve means having a longitudinal axis and adapted to receive and guide a rotatable drill, b. leg means secured to said sleeve means, said leg means having facing inner surfaces defining an angle bisected by the longitudinal axis of said sleeve means, the bottoms of said leg means lying in a common plane perpendicular to the longitudinal axis of said sleeve means, c. the bottoms of said leg means being adapted to contact a flat surface when the rotatable drill is to drill a hole perpendicularly in said flat surface, d. the facing inner surfaces of said leg means being adapted to tangentially contact a curved surface when the rotatable drill is to drill a hole perpendicularly in said curved surface, e. said leg means comprises a pair of legs adjacent said sleeve means, f. a scribed line on said apparatus at the intersection of said pair of legs, said scribed line bisecting the angle defined by the inner surfaces of said pair of legs and adapted to index the apparatus in a first direction over a specific location on the surface to be drilled, g. an edge of one of said pair of legs, an edge of the other of said pair of legs, and the longitudinal axis of said sleeve means all lying in the same plane which plane is perpendicular to the plane defined by said scribed line and the longitudinal axis of Said sleeve means, said edges being adapted to be aligned to index the apparatus in a second direction perpendicular to said first location over the specific location on the surface to be drilled.
Claim 5
Dependent Claim
289 words
Apparatus for guiding a rotatable drill perpendicular to a flat or selectively to a curved surface, said apparatus comprising: a. sleeve means having a longitudinal axis and adapted to receive and guide a rotatable drill, b. leg means secured to said sleeve means, said leg means having facing inner surfaces defining an angle bisected by the longitudinal axis of said sleeve means, the bottoms of said leg means lying in a common plane perpendicular to the longitudinal axis of said sleeve means, c. the bottoms of said leg means being adapted to contact a flat surface when the rotatable drill is to drill a hole perpendicularly in said flat surface, d. the facing inner surfaces of said leg means being adapted to tangentially contact a curved surface when the rotatable drill is to drill a hole perpendicularly in said curved surface, e. said leg means comprises a pair of legs adjacent said sleeve means, f. a scribed line on said apparatus at the intersection of said pair of legs, said scribed line bisecting the angle defined by the inner surfaces of said pair of legs and adapted to index the apparatus in a first direction over a specific location on the surface to be drilled, g. an edge of one of said pair of legs, an edge of the other of said pair of legs, and the longitudinal axis of said sleeve means all lying in the same plane which plane is perpendicular to the plane defined by said scribed line and the longitudinal axis of Said sleeve means, said edges being adapted to be aligned to index the apparatus in a second direction perpendicular to said first location over the specific location on the surface to be drilled.
Claim 6
Dependent Claim
63 words
Apparatus as in claim 3, wherein: h. the legs of said pair of legs are staggered relative to each other, the forward edge of one leg relative to one end of the apparatus and the rear edge of the other leg relative to said one end of the apparatus and the longitudinal axis of the sleeve means all lying in the same plane.
Claim 7
Dependent Claim
74 words
Apparatus as in claim 3, wherein: h. said leg means further comprises a second pair of legs spaced from said first mentioned pair of legs, i. an elongated member secured at one end to said first mentioned pair of legs and secured at the other end to said second pair of legs, said elongated member being adapted to be grasped to secure the apparatus over a specific location on the surface to be drilled.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |