Patent US3283488A successfully refreshed from Google Patents.
US3283488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary safety blade
Assignee: Atlantic Richfield Co
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Filing: 1963-05-01
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Granted: 1966-11-08
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Expires: 1983-05-01
Abstract
No abstract record available.
Inventors
- 👤 Alphens A Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:13
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN IMPROVED CUTTER FOR ROTARY MOWERS ADAPTED TO ROTATE IN A SUBSTANTIALLY HORIZONTAL PLANE ABOUT A VERTICALLY-DISPOSED SHAFT COMPRISING A HUB PORTION ADAPTED FOR ATTACHMENT TO SAID VERTICALLY-DISPOSED SHAFT, A PERIPHERAL FLAT METAL RING SURROUNDING AND SPACED FROM SAID HUB PORTION, SAID RING HAVING AN UNBROKEN OUTER CIRCULAR NONCUTTING EDGE FORMING THE OUTER CIRCUMFERENCE OF SAID CUTTER, A PLURALITY OF SPOKE-TYPE SUPPORT ELEMENTS CONNECTING SAID HUB PORTION TO SAID RING, A PLURALITY OF CUTTING ELEMENTS CONSISTING OF NORMALLY FLEXIBLE WIRES DRAWN TAUT BETWEEN SAID HUB PORTION AND SAID RING TO FORM SUBSTAN-
Claim 2
Dependent Claim
92 words
AN IMPROVED CUTTER FOR ROTARY MOWERS ADAPTED TO ROTATE IN A SUBSTANTIALLY HORIZONTAL PLANE ABOUT A VERTICALLY-DISPOSED SHAFT COMPRISING A HUB PORTION ADAPTED FOR ATTACHMENT TO SAID VERTICALLY-DISPOSED SHAFT, A PERIPHERAL FLAT METAL RING SURROUNDING AND SPACED FROM SAID HUB PORTION, SAID RING HAVING AN UNBROKEN OUTER CIRCULAR NONCUTTING EDGE FORMING THE OUTER CIRCUMFERENCE OF SAID CUTTER, A PLURALITY OF SPOKE-TYPE SUPPORT ELEMENTS CONNECTING SAID HUB PORTION TO SAID RING, A PLURALITY OF CUTTING ELEMENTS CONSISTING OF NORMALLY FLEXIBLE WIRES DRAWN TAUT BETWEEN SAID HUB PORTION AND SAID RING TO FORM SUBSTAN-
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |