US3874810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill guide
Assignee: PORTALIGN TOOL CO
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Filing: 1973-06-21
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Granted: 1975-04-01
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Expires: 1993-06-21
Abstract
Abstract A rugged, versatile, drill guide of simple design for positioning a drill bit relative to varied workpiece configurations.
Inventors
- 👤 William D Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:24
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0078; B25H1/0057; B25H1/0064; Y; Y10; Y10T; Y10T408/00; Y10T408/18; Y10T408/55; Y10T408/561; Y10T408/5626; Y10T408/564
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A drill guide comprising: a base plate having a central aperture, parallel diametrically opposed support rods adjustably positioned and attached to said plate, a drill motor support between and slidably mounted on said support rods, said support including a centrally disposed upright housing, a rotatable spindle in said housing, said spindle having means at its upper end for engagement with a drill motor rotatable shaft and means at its lower end for engagement with a drill chuck, and a limit stop collar slidably positionable on one of said rods to limit downward movement of said support on said rods, said plate having apertures therein to permit insertion of the lower ends of said rods below said plate and adjustment means on said plate for adjustably positioning said lower ends in the plane of said plate and below said plate.
Claim 2
Dependent Claim
139 words
A drill guide comprising: a base plate having a central aperture, parallel diametrically opposed support rods adjustably positioned and attached to said plate, a drill motor support between and slidably mounted on said support rods, said support including a centrally disposed upright housing, a rotatable spindle in said housing, said spindle having means at its upper end for engagement with a drill motor rotatable shaft and means at its lower end for engagement with a drill chuck, and a limit stop collar slidably positionable on one of said rods to limit downward movement of said support on said rods, said plate having apertures therein to permit insertion of the lower ends of said rods below said plate and adjustment means on said plate for adjustably positioning said lower ends in the plane of said plate and below said plate.
Claim 3
Dependent Claim
21 words
A drill guide as set forth in claim 1 wherein the axis of rotation of said spindle passes through said aperture.
Claim 4
Dependent Claim
40 words
A drill guide as set forth in claim 1 including a pair of diametrically opposed projections on the top surface of said plate, V-shaped grooves on said projections to cradle and center cylindrical objects thereon for drilling holes diametrically therethrough.
Claim 5
Dependent Claim
62 words
A drill guide as set forth in claim 1 wherein said support rods are attached to said plate by means of bosses on said plate with said apertures therein to permit slidable movement of said rods therein, and said adjustment means including set screws in said bosses engagable with said support rods to maintain said rods at predetermined positions in said bosses.
Claim 6
Dependent Claim
67 words
A drill guide as set forth in claim 4 wherein said plate has said apertures therein below said bosses to permit passage of the lower ends of said support rods below the plane of said plate, whereby said rods can be individually and separately adjusted by said set screws for positioning said plate on an irregular surface for drilling a hole at a predetermined angle relative thereto.
Claim 7
Dependent Claim
49 words
A drill guide as set forth in claim 1 including a drill bit received in said drill chuck, whereby holes can be drilled parallel to the side surfaces of a narrow top workpiece, said rods being positioned against said side surfaces and said plate resting on said narrow top.
Claim 8
Dependent Claim
53 words
A drill guide as set forth in claim 1 wherein said means at the upper end of said spindle is female threads engageable with male threads on the drill motor shaft and wherein said means at the lower end of said spindle is male threads engageable with female threads on said drill chuck.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |