Patent US3220449A successfully refreshed from Google Patents.
US3220449A
Expired / Lapsed
US
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Self-cleaning hole saw
Assignee: Individual
•
Filing: 1964-03-04
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Granted: 1965-11-30
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Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Robert P Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:06
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0426; Y; Y10; Y10T; Y10T408/00; Y10T408/86; Y10T408/87; Y10T408/8725; Y10T408/8729; Y10T408/89; Y10T408/895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A HOLE SAW DEVICE COMPRISING A COLLAR, A STUD AXIALLY ADJUSTABLE WITHIN SAID COLLAR HAVING A SHANK PORTION FOR ATTACHMENT TO THE CHUCK OF A DRILL, A CYLINDRICAL SAW UNIT REMOVEABLE SECURED TO SAID COLLAR AND AT LEAST ONE PAIR OF SHAVING BLADE MEANS DISPOSED INTERIORLY OF SAID CYLINDRICAL SAW UNIT ADJACENT THE LOWER END THEREOF, SAID CYLINDRICAL SAW UNIT PROVIDING AT ITS UPPER PORTION INTERIORLY THEREOF A COLLECTING CHAMBER FOR SHAVINGS AND CUTTINGS.
Claim 2
Dependent Claim
74 words
A HOLE SAW DEVICE COMPRISING A COLLAR, A STUD AXIALLY ADJUSTABLE WITHIN SAID COLLAR HAVING A SHANK PORTION FOR ATTACHMENT TO THE CHUCK OF A DRILL, A CYLINDRICAL SAW UNIT REMOVEABLE SECURED TO SAID COLLAR AND AT LEAST ONE PAIR OF SHAVING BLADE MEANS DISPOSED INTERIORLY OF SAID CYLINDRICAL SAW UNIT ADJACENT THE LOWER END THEREOF, SAID CYLINDRICAL SAW UNIT PROVIDING AT ITS UPPER PORTION INTERIORLY THEREOF A COLLECTING CHAMBER FOR SHAVINGS AND CUTTINGS.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |