US3838935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill guide
Assignee: BOYAJIAN ALFRED
•
Filing: 1973-08-10
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Granted: 1974-10-01
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Expires: 1993-08-10
Abstract
Abstract A drill guide comprising a base, post fixed to the base, a carriage mounted on the post for movement toward and from the base, and an adjustable coupling on the carriage for securing a power drill thereto with the axis of the drill at a predetermined angle to the base, said carriage being adapted to be removed to enable using the drill independently of the base and to be restored without readjustment to said predetermined position. The coupling supports the drill forwardly and laterally of the post substantially centered with respect to the base and the base contains an opening through which the drill may be lowered into engagement with the work. There is means in the form of a second post for guiding the carriage as it is raised and lowered, a spring yieldably supporting the carriage above the base for movement toward the base, and means for limiting downward and upward movement of the carriage relative to the base. A gauge plate is adjustably mounted on the base below the opening and has on it intersecting gauge marks adapted to be aligned with the axis of the drill. A platen corresponding in configuration to the opening in the base is hingedly supported in the opening in which position its surface is flush with the surface of the base and for movement from the opening to a folded back position away from the opening.
Inventors
- 👤 A Boyajian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:40
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0078; Y; Y10; Y10S; Y10S408/00; Y10S408/712; Y10T; Y10T408/00; Y10T408/55; Y10T408/553; Y10T408/561; Y10T408/5626; Y10T408/5627; Y10T408/564; Y10T408/5653; Y10T408/91; Y10T408/93
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
152 words
A portable drill guide comprising a base, a carriage, means mounting the carRiage on the base for movement toward and from the base, said carriage being removable from said mounting means, a coupling mounted on the carriage for movement therewith to which a power drill together with a drill bit is adapted to be secured, and spring means yieldably supporting the carriage above the base for downward movement toward the base, said coupling being characterized in that it is adjustable on the carriage to dispose the drill in a predetermined position with the axis of the drill bit disposed in a predetermined angle to the base such that after said adjustment has been made the carriage may be removed from the mounting means to enable using the drill independently of the supporting base and replaced without having to make a readjustment to restore the drill to said predetermined position and predetermined angle.
Claim 2
Dependent Claim
152 words
A portable drill guide comprising a base, a carriage, means mounting the carRiage on the base for movement toward and from the base, said carriage being removable from said mounting means, a coupling mounted on the carriage for movement therewith to which a power drill together with a drill bit is adapted to be secured, and spring means yieldably supporting the carriage above the base for downward movement toward the base, said coupling being characterized in that it is adjustable on the carriage to dispose the drill in a predetermined position with the axis of the drill bit disposed in a predetermined angle to the base such that after said adjustment has been made the carriage may be removed from the mounting means to enable using the drill independently of the supporting base and replaced without having to make a readjustment to restore the drill to said predetermined position and predetermined angle.
Claim 3
Dependent Claim
39 words
Apparatus according to claim 1, wherein the carriage and coupling is adapted to be attached to the drill housing in a position such as not to interfere with the normal use of the drill when removed from the base.
Claim 4
Dependent Claim
165 words
A portable drill guide comprising a base, a post fixed to the base in an upright position, a carriage mounted on the post for movement thereon to and from the base, said carriage being removable from the post, a coupling mounted on the carriage for movement therewith to which a power drill together with a drill bit is adapted to be secured, and spring means disposed on the post between the base and the carriage for yieldably supporting the carriage above the base for downward movement toward the base, said coupling being characterized in that it is adjustable on the carriage to dispose the drill in a predetermined position with the drill bit disposed at a predetermined angle to the base, and such that after said adjustment has been made the carriage may be removed from the post to enable using the drill independently of the base and replaced without having to make a readjustment to restore the drill to said predetermined position and angle.
Claim 5
Dependent Claim
165 words
A portable drill guide comprising a base, a post fixed to the base in an upright position, a carriage mounted on the post for movement thereon to and from the base, said carriage being removable from the post, a coupling mounted on the carriage for movement therewith to which a power drill together with a drill bit is adapted to be secured, and spring means disposed on the post between the base and the carriage for yieldably supporting the carriage above the base for downward movement toward the base, said coupling being characterized in that it is adjustable on the carriage to dispose the drill in a predetermined position with the drill bit disposed at a predetermined angle to the base, and such that after said adjustment has been made the carriage may be removed from the post to enable using the drill independently of the base and replaced without having to make a readjustment to restore the drill to said predetermined position and angle.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 3, comprising means for limiting upward movement of the carriage.
Claim 7
Dependent Claim
14 words
Apparatus according to claim 3, comprising means for limiting downward movement of the carriage.
Claim 8
Dependent Claim
36 words
Apparatus according to claim 3, comprising a second post fixed to the base in an upright position spaced forwardly and parallel to the first post and means on the carriage slidingly engaged with the second post.
Claim 9
Dependent Claim
19 words
Apparatus according to claim 6, wherein the second post is spaced forwardly of the axis of the drill bit.
Claim 10
Dependent Claim
36 words
Apparatus according to claim 6, wherein the coupling supports the drill substantially midway between the posts with respect to the front and rear ends of the base and substantially midway between the sides of the base.
Claim 11
Dependent Claim
37 words
Apparatus according to claim 3, comprising a second post fixed to the base in an upright position spaced transversely of and parallel to the first post, and means on the carriage slidingly engaged with the second post.
Claim 12
Dependent Claim
12 words
Apparatus according to claim 1, wherein the coupling comprises a universal joint.
Claim 13
Dependent Claim
16 words
Apparatus according to claim 1, characterized in that the coupling comprises a ball and socket joint.
Claim 14
Dependent Claim
69 words
Apparatus according to claim 1, wherein the carriage contains pairs of horizontally spaced smooth bore holes and pairs of vertically spaced threaded holes, and wherein two horizontally aligned screws extend through the smooth bored holes of the carriage and are threaded into the coupling and two vertically aligned screws are mounted in the threaded holes in the carriage above and below the horizontally aligned holes and abut the coupling.
Claim 15
Dependent Claim
29 words
Apparatus according to claim 5, wherein the carriage has vertically disposed, spaced parallel openings slidably engaged with the first post and a bifurcate slidably engaged with the second post.
Claim 16
Dependent Claim
28 words
Apparatus according to claim 6, wherein the first post is of circular cross-section and the second post is of non-circular cross-section and having screw-threaded portions for nut stops.
Claim 17
Dependent Claim
85 words
Apparatus according to claim 6, wherein the posts are fixed to the base along one side, the coupling supports the drill between the posts with respect to the front and back disposition of the drill and substantially midway between the sides with respect to the side-to-side disposition of the drill and the base contains an opening below the bit which affords access of the bit to the work, a clear view of the locating lines on the workpiece and the gauge lines on the base.
Claim 18
Dependent Claim
27 words
Apparatus according to claim 15, wherein the opening extends rearwardly from the front end of the base to the rear side of the axis of the bit.
Claim 19
Dependent Claim
153 words
A portable drill guide comprising a base, a post fixed to the base in an upright position, a carriage mounted on the post for movement thereon to and from the base, a coupling mounted on the carriage for movement therewith to which a power drill together with a bit are adapted to be secured, said coupling supporting the drill forwardly and laterally of the post so as to be substantially centered on the base, and said coupling being adjustable to dispose the drill with the axis of the bit at a predetermined angle to the base, spring means on the post between the base and the carriage for yieldably supporting the carriage above the base, said base containing an opening below the bit which extends from the front of the base to behind the bit, and a gauge plate mounted on the base below the opening on which there are intersecting gauge lines.
Claim 20
Dependent Claim
153 words
A portable drill guide comprising a base, a post fixed to the base in an upright position, a carriage mounted on the post for movement thereon to and from the base, a coupling mounted on the carriage for movement therewith to which a power drill together with a bit are adapted to be secured, said coupling supporting the drill forwardly and laterally of the post so as to be substantially centered on the base, and said coupling being adjustable to dispose the drill with the axis of the bit at a predetermined angle to the base, spring means on the post between the base and the carriage for yieldably supporting the carriage above the base, said base containing an opening below the bit which extends from the front of the base to behind the bit, and a gauge plate mounted on the base below the opening on which there are intersecting gauge lines.
Claim 21
Dependent Claim
32 words
A portable drill guide according to claim 17, wherein said gauge plate is adapted to be adjusted to align the intersection of said intersecting gauge lines with the axis of the bit.
Claim 22
Dependent Claim
55 words
Apparatus according to claim 17, wherein the gauge plate contains slots through which screw bolts are received and threaded into the base, and said slots are oversized so that the gauge plate is adjustable in a plane parallel to the plane of the base, forwardly and rearwardly, from side-to-side and angularly about a perpendicular axis.
Claim 23
Dependent Claim
38 words
Apparatus according to claim 17, wherein the gauge lines comprise edges of the gauge plate, one of which has on it a gauge mark situated on a line which intersects the edge of the other at right angles.
Claim 24
Dependent Claim
30 words
Apparatus according to claim 20, wherein the gauge marks and edges are located so as to extend to the bottom surface of the base adjacent the surface of the workpiece.
Claim 25
Dependent Claim
60 words
Apparatus according to claim 17, wherein a platen corresponding in configuration to the opening in the base is hingedly supported in the opening, in which position its surface is flush with the surface of the base, and for movement from said opening to a folded back position in which the surface rests on the base rearwardly away from the opening.
Claim 26
Dependent Claim
23 words
Apparatus according to claim 17, wherein a platen corresponding in configuration to the opening in the base is removably supported in the opening.
Claim 27
Dependent Claim
29 words
A drill guide according to claim 22, wherein the platen contains a clearance hole, the center of which is in substantial alignment with the vertical axis of the bit.
Claim 28
Dependent Claim
31 words
Apparatus according to claim 22, wherein there are shoulders along the inner opposite sides of said opening and the platen is adapted to rest on said shoulders when occupying said opening.
Claim 29
Dependent Claim
17 words
Apparatus according to claim 1, wherein there are traction pads secured to the underside of the base.
Claim 30
Dependent Claim
115 words
The combination with a drill guide according to claim 15, of an aligning device adapted to be inserted into the chuck of a drill, said aligning device comprising a post adapted to be lowered into engagement with the work and a radially extending arm extending from the post having an end coextensive with the lower end of the post, said device being rotatable in the chuck and by continuous engagement of the post and the extension with the work operable to dispose the drill with the axis of the chuck perpendicular to the work and as an aid to adjusting the gauge plate so that the gauge lines intersect the axis of the aligning device.
Claim 31
Dependent Claim
16 words
AppaRatus according to claim 1, wherein the base contains a compartment provided with a hinged cover.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |