US4389790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill guide
Assignee: Individual
•
Filing: 1981-04-16
•
Granted: 1983-06-28
•
Expires: 2001-04-16
Abstract
Abstract A drill guide for accurate placement of bolt holes on a mud sill or the like which includes a guide block having plural bores extending therethrough from a top face and through a bottom face thereof which are suitably dimensioned and adapted to receive a drill bit for accurate bore placement on a mud sill, in which the drill guide includes an upright which is orthogonal to the guide block which insures perpendicularity of the bores and a spring biased slide which travels in a trackway on the guide block so that the upright is yieldingly connected to the guide block to cause contraction thereof, the guide block having an end face remote from the upright with a semi cylindrical groove running vertically which abuts against an associated placement marker for accurate placement of the bores within the mud sill.
Inventors
- 👤 Alvin E. Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:10
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/28; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/567; Y10T408/96; Y10T408/98
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A drill guide for accurate placement of bolt holes on a mud sill or the like comprising in combination; a guide block having at least one bore therethrough adapted to receive a drill bit for accurate bore placement on the mud sill, an upright, orthogonal to said guide block to assure perpendicularity of the bores, and means to yieldingly connect said upright to said guide block and to maintain said upright orthogonal to said guide block during a range of relative movement whereby the distance between said guide block and said upright can be varied to accommodate sills of different dimensions along with an associated underlying slab and a placement marker extending up from the slab wherein said upright includes portions above and below said guide block whereby said portion below can abut against the sill.
Claim 2
Dependent Claim
136 words
A drill guide for accurate placement of bolt holes on a mud sill or the like comprising in combination; a guide block having at least one bore therethrough adapted to receive a drill bit for accurate bore placement on the mud sill, an upright, orthogonal to said guide block to assure perpendicularity of the bores, and means to yieldingly connect said upright to said guide block and to maintain said upright orthogonal to said guide block during a range of relative movement whereby the distance between said guide block and said upright can be varied to accommodate sills of different dimensions along with an associated underlying slab and a placement marker extending up from the slab wherein said upright includes portions above and below said guide block whereby said portion below can abut against the sill.
Claim 3
Dependent Claim
49 words
The device of claim 1 wherein said means to yieldingly connect said upright to said guide block include a trackway on said guide block, a slide disposed therein extending orthogonally from and connected to said upright and a spring extending therebetween which urges said upright and guide block together.
Claim 4
Dependent Claim
40 words
The device of claim 2 wherein said trackway includes a rectangular grid having an open end wherein said slide extends in said open end wherein a slide extremity remote from said open end connects to said grid by said spring.
Claim 5
Dependent Claim
21 words
The device of claim 2 wherein two said trackways, slides and springs are provided on opposed sides of said guide block.
Claim 6
Dependent Claim
29 words
The device of claim 1 wherein said guide block includes a semi cylindrical vertical groove on an end face thereof remote from said upright which engages the placement marker.
Claim 7
Dependent Claim
25 words
The device of claim 1 wherein a lower said portion of said upright below said guide block includes a rectangular frame extending from said upright.
Claim 8
Dependent Claim
21 words
The device of claim 6 wherein said rectangular frame includes a lowermost horizontal leg with termini laterally extending beyond said frame.
Claim 9
Dependent Claim
19 words
The device of claim 1 wherein said upright is a substantially elongate rectangular solid having a square cross section.
Claim 10
Dependent Claim
35 words
The device of claim 1 wherein plural said bores are spaced on and through top and bottom faces of said guide block at appropriate intervals to accurately provide bores on mud sills having various dimensions.
Claim 11
Dependent Claim
36 words
The device of claim 1 wherein a retention means is provided on a bottom face of said guide block to keep said guide block in an extended position relative to said upright against said yielding means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |