US3267975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling means for hole saw assembly
Assignee: Black and Decker Corp
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Filing: 1964-06-16
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Granted: 1966-08-23
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Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Sherwood G Enders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:17
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0473; Y; Y10; Y10T; Y10T408/00; Y10T408/60; Y10T408/62; Y10T408/70; Y10T408/89; Y10T408/892; Y10T408/895; Y10T408/8957; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A HOLE SAW ASSEMBLY COMPRISING A DRIVING MANDREL AND A TUBULAR HOLE SAW, THE HOLE SAW HAVING A CUTTING EDGE AND FURTHER HAVING A BASE PORTION FORMED WITH A PAIR OF APERTURES, THE IMPROVEMENT IN COUPLING MEANS BETWEEN THE MANDREL AND THE SAW, WHICH COMPRISES: (A) A PAIR OF DRIVE PINS JOURNALED FOR LONGITUDINAL SLIDING MOVEMENT IN RESPECTIVE BORES FORMED IN THE MANDREL; (B) MEANS FOR POSITIVELY LIMITING THE LONGITUDINAL SLIDING MOVEMENT OF EACH PIN IN EACH DIRECTION RELATIVE TO THE MANDREL, WHEREBY EACH PIN HAS TWO POSITIVE LOCATIONS WITH RESPECT TO THE MANDREL, ONE ADVANCED AND THE OTHER RETRACTED; (C) SAID LAST-NAMED MEANS INCLUDING: (1) A PAIR OF EXTERNAL ANNULAR GROOVES FORMED ON EACH PIN;
Claim 2
Dependent Claim
117 words
IN A HOLE SAW ASSEMBLY COMPRISING A DRIVING MANDREL AND A TUBULAR HOLE SAW, THE HOLE SAW HAVING A CUTTING EDGE AND FURTHER HAVING A BASE PORTION FORMED WITH A PAIR OF APERTURES, THE IMPROVEMENT IN COUPLING MEANS BETWEEN THE MANDREL AND THE SAW, WHICH COMPRISES: (A) A PAIR OF DRIVE PINS JOURNALED FOR LONGITUDINAL SLIDING MOVEMENT IN RESPECTIVE BORES FORMED IN THE MANDREL; (B) MEANS FOR POSITIVELY LIMITING THE LONGITUDINAL SLIDING MOVEMENT OF EACH PIN IN EACH DIRECTION RELATIVE TO THE MANDREL, WHEREBY EACH PIN HAS TWO POSITIVE LOCATIONS WITH RESPECT TO THE MANDREL, ONE ADVANCED AND THE OTHER RETRACTED; (C) SAID LAST-NAMED MEANS INCLUDING: (1) A PAIR OF EXTERNAL ANNULAR GROOVES FORMED ON EACH PIN;
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |