Patent US4760870A successfully refreshed from Google Patents.
US4760870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic dado and scoring machine
Assignee: Individual
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Filing: 1987-03-05
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Granted: 1988-08-02
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Expires: 2007-03-05
Abstract
Abstract A machine for performing dados, grooves, mortises, etc., of controlled depth in cabinet component parts and the like. Consisting in part of a main frame with a plurality of elongated support members of equal length. Having incorporated a plurality of tooling mounted to said frame, consisting in part, a plurality of scoring blades which aid a plurality of cutters in removal of material in a predetermined groove. An automatic revolving cylindrical material transfer apparatus, being of geometric shapes, and effectively advancing a work piece underneath said scoring blades and said cutters, and holding said work piece firmly to work surface and against a guide. The operating sequences herein are preferable but not necessarily limited to automatic control.
Inventors
- 👤 Dwight L. Speck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:27
CPC Classifications
B; B27; B27G; B27G19/00; B27G19/10; B27C; B27C5/00; B27C5/02; B27C5/06; B27F; B27F1/00; B27F1/02; B27F1/04; B27F5/00; B27F5/02; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0304
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
Apparatus for cutting dados in sheet materials, and comprising: a. a flat work surface; b. sheet material guide means mounted on said flat work surface; c. a pair of rotatable and adjustable spaced-apart circular saw blades mounted in fixed location relative to said guide means; d. a rotatable and adjustable primary dado cutter means mounted in aligned relation relative to said circular saw blades and in fixed location relative to said guide means; e. adjustable feed roller means mounted in fixed relation relative to said guide means; and f. drive means rotating said spaced-apart circular saw blades, said primary cutter means, and said feed roller means in the same rotational direction, said circular saw blades contacting sheet material prior to said dado cutter means as the sheet material is fed in one direction along said guide means.
Claim 2
Dependent Claim
137 words
Apparatus for cutting dados in sheet materials, and comprising: a. a flat work surface; b. sheet material guide means mounted on said flat work surface; c. a pair of rotatable and adjustable spaced-apart circular saw blades mounted in fixed location relative to said guide means; d. a rotatable and adjustable primary dado cutter means mounted in aligned relation relative to said circular saw blades and in fixed location relative to said guide means; e. adjustable feed roller means mounted in fixed relation relative to said guide means; and f. drive means rotating said spaced-apart circular saw blades, said primary cutter means, and said feed roller means in the same rotational direction, said circular saw blades contacting sheet material prior to said dado cutter means as the sheet material is fed in one direction along said guide means.
Claim 3
Dependent Claim
52 words
The apparatus defined by claim 1 wherein said feed roller means are resilient, externally tapered driven rollers, said tapered feed roller means urging the sheet material against said guide means as the sheet material is being fed in the direction of from said circular saw blades toward said primary dado cutter means.
Claim 4
Dependent Claim
39 words
The apparatus defined by claim 1 further comprising guard means, said guard means preventing sheet material from being fed along said guide means except in the direction of from said circular saw blades toward said primary dado cutter 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) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |