Patent US3207196A successfully refreshed from Google Patents.
US3207196A
Expired / Lapsed
US
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Countersinking tool
Assignee: Gardner Denver Inc
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Filing: 1963-06-24
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Granted: 1965-09-21
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Jr George B Stillwagon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B2251/00; B23B2251/66; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/905; Y10T408/909; Y10T408/9095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A BORING TOOL FOR FORMING COUNTRSINK RECESSES IN WALLBOARD MATERIAL AND THE LIKE WHICH RECESSES ARE ADAPTED TO RECEIVE SCREW HEADS THEREIN, COMPRISING AN ELONGATED METAL BODY, MEANS ON THE FORWARD END OF SAID BODY DEFINING FOUR EQUALLY SPACED WINGS SEPARATED BY FLUTES AND EXTENDING OUTWARDLY AND REARWARDLY TO FORM A COUNTERSINK PORTION, EACH OF SAID WINGS BEING FURTHER FORMED WITH AN OUTWARDLY EXTENDING COUNTERBORE PORTION FORMED AS AN INTEGRAL EXTENSION OF SAID WINGS AND LEADING TO THE OUTER SURFACE OF SAID BODY WITH SAID OUTWARDLY EXTENDING PORTION HAVING A SUBSTANTIALLY INCREASED SLOPE AS COMPARED TO SAID COUNTERSINK PORTION PROVIDING SUBSTANTIALLY INCREASED RESISTANCE TO MOVEMENT INTO SUCH MATERIAL, AND THE JUNCTION BETWEEN SAID FLUTES AND SAID WINGS AT SAID COUNTERSINK AND COUNTERBORE PORTIONS FORMING ABRADING EDGES FOR REMOVING WALLBOARD MATERIAL WHEN PRESSED DIRECTLY INTO ENGAGEMENT WITH A WALLBOARD AND ROTATED.
Claim 2
Dependent Claim
140 words
A BORING TOOL FOR FORMING COUNTRSINK RECESSES IN WALLBOARD MATERIAL AND THE LIKE WHICH RECESSES ARE ADAPTED TO RECEIVE SCREW HEADS THEREIN, COMPRISING AN ELONGATED METAL BODY, MEANS ON THE FORWARD END OF SAID BODY DEFINING FOUR EQUALLY SPACED WINGS SEPARATED BY FLUTES AND EXTENDING OUTWARDLY AND REARWARDLY TO FORM A COUNTERSINK PORTION, EACH OF SAID WINGS BEING FURTHER FORMED WITH AN OUTWARDLY EXTENDING COUNTERBORE PORTION FORMED AS AN INTEGRAL EXTENSION OF SAID WINGS AND LEADING TO THE OUTER SURFACE OF SAID BODY WITH SAID OUTWARDLY EXTENDING PORTION HAVING A SUBSTANTIALLY INCREASED SLOPE AS COMPARED TO SAID COUNTERSINK PORTION PROVIDING SUBSTANTIALLY INCREASED RESISTANCE TO MOVEMENT INTO SUCH MATERIAL, AND THE JUNCTION BETWEEN SAID FLUTES AND SAID WINGS AT SAID COUNTERSINK AND COUNTERBORE PORTIONS FORMING ABRADING EDGES FOR REMOVING WALLBOARD MATERIAL WHEN PRESSED DIRECTLY INTO ENGAGEMENT WITH A WALLBOARD AND ROTATED.
References Cited (Backward Citations)
US74490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |