US3910327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work-holding router guide
Assignee: Individual
•
Filing: 1975-03-10
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Granted: 1975-10-07
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Expires: 1995-03-10
Abstract
Abstract A work-holding router guide comprising an adjustable rectangular frame adapted to surround, in matching peripheral engagement, a rectangular work piece such as a wooden cabinet door, the sides of the frame being flat, straight-edge, border and guide bars adjustably connected together at the corners of the frame by barclamping and template units; the inner edges of said bars, together with the templates at the corners of the frame, serving to guide a portable, hand-manipulated, work-piece-supported, electric motor driven router in a path such that the depending router bit cuts a precise ornamental groove, to a controlled depth and of predetermined pattern, in the work piece.
Inventors
- 👤 Harry R Heckenlaible
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:54
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; B23Q35/104; B23Q35/42; B23Q35/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
A worK-holding router guide comprising a size-adjustable frame adapted to surround a work piece in peripheral engagement, the frame including border and guide bars which are edge-exposed above the top surface of the work piece, and bar-clamping units adjustably connecting the bars at adjacent ends; said units including releasable clamping means to maintain the bars in selected positions of adjustment, and templates associated with the bar-clamping units and overhanging the corners of the work piece; the guide being adapted for use with a portable, handmanipulated router, the router being supported by the work piece and having a driven groove-cutting bit depending into the said work piece; a guide bar and template follower, and means mounting the follower on the router in position for successive engagement in guided relation with the exposed edges of the guide bars and the templates upon progressive movement of the router on the work piece within the confines of the frame, whereby the router bit cuts a groove of predetermined pattern in such work piece.
Claim 2
Dependent Claim
169 words
A worK-holding router guide comprising a size-adjustable frame adapted to surround a work piece in peripheral engagement, the frame including border and guide bars which are edge-exposed above the top surface of the work piece, and bar-clamping units adjustably connecting the bars at adjacent ends; said units including releasable clamping means to maintain the bars in selected positions of adjustment, and templates associated with the bar-clamping units and overhanging the corners of the work piece; the guide being adapted for use with a portable, handmanipulated router, the router being supported by the work piece and having a driven groove-cutting bit depending into the said work piece; a guide bar and template follower, and means mounting the follower on the router in position for successive engagement in guided relation with the exposed edges of the guide bars and the templates upon progressive movement of the router on the work piece within the confines of the frame, whereby the router bit cuts a groove of predetermined pattern in such work piece.
Claim 3
Dependent Claim
19 words
A router guide, as in claim 1, in which the guide bar and template follower is an annular ring.
Claim 4
Dependent Claim
62 words
A router guide, as in claim 2, in which the follower mounting means comprises an attachment disc, the router having a base plate, means attaching the disc to said base plate, and a cylindrical neck depending axially from the disc; the annular ring, which comprises the follower, being engaged on such neck, and the latter surrounding the router bit in concentric relation.
Claim 5
Dependent Claim
103 words
A router guide, as in claim 1, in which the bar-clamping units each include, at one end of each guide bar, a bottom plate, a top plate, and means securing the plates to said guide bar with portions of both plates projecting beyond said one end of such bar, another bar of the frame extending in initially slidable relation between such projecting portions of the plates as a guideway; and said releasable clamping means being associated with one of such projecting portions of the plates and adapted to engage and releasably clamp said other bar against said one end of the first-named bar.
Claim 6
Dependent Claim
63 words
A router guide, as in claim 4, in which the releasable clamping means includes an eccentric cam journaled, for manual rotation, on said one projecting portion of the plates; said cam being adapted, in a predetermined rotative position thereof, to bear against an outer edge of said other bar so as to clamp the same against said one end of the first-named bar.
Claim 7
Dependent Claim
47 words
A router guide, as in claim 5, including a pivot bolt journaling the eccentric cam on such one projecting portion of the plates, and a manually accessible wing nut threaded on the bolt and adapted to tighten against the cam to releasably lock the latter against rotation.
Claim 8
Dependent Claim
23 words
A router guide, as in claim 4, in which the top plate of each bar-clamping unit includes, in integral relation, the corresponding template.
Claim 9
Dependent Claim
22 words
A router guide, as in claim 7, in which each template is rectangular and overhangs the related corner of the work piece.
Claim 10
Dependent Claim
51 words
A router guide, as in claim 4, in which the bars are all of like thickness; there being a thin spacer plate interposed between one of said first-named plates and said first-named bar in order to space said projecting portions a distance slightly greater than the thickness of said other bar.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |