US3559513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hole saw
Assignee: Individual
•
Filing: 1968-05-06
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Granted: 1971-02-02
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Expires: 1988-05-06
Abstract
Abstract A HOLE SAW IN THE FORM OF AN ARBOR HAVING A CUP MEMBER SECURED TO ONE END THEREOF AND A CIRCULAR SAW BLADE PRESS FITTED INTO THE CUP SO THAT THE BLADE FLARES OUTWARDLY IN THE DIRECTION OF ITS CUTTING EDGE. THE HOLW SAW ALSO INCLUDES A CENTER PILOT OR DRILL MEMBER WHICH MAY BE A CONVENTIONAL DRILL, A PIERCING TOOL OR A TAPERED PILOT MEMBER. THE TEETH ON THE BLADE ARE FROUND SO THT THE CUTTING EDGES ARE HIGH AROUND THE OUTER PERIPHERY AND LOW AROUND THE INNER PERIPHERY OIF THE BLADE. SELECTED TEETH AROUND LESS THAN HALF OF THE CIRCUMFERENCE OF THE BLADE ARE SET RADIALLY INWARDLY A SLIGHT EXTENT.
Inventors
- 👤 Everett D Hougen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:32
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0426; B23B51/0473; B23B2250/00; B23B2250/12; B23B2251/00; B23B2251/14; Y; Y10; Y10T; Y10T407/00; Y10T407/10; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/89; Y10T408/895; Y10T408/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |