Patent US3555798A successfully refreshed from Google Patents.
US3555798A
Expired / Lapsed
US
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Mowing apparatus
Assignee: Gebrueder Welger GmbH and Co KG
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Filing: 1968-08-12
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Granted: 1971-01-19
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Expires: 1988-08-12
Abstract
Abstract THE INVENTION RELATES TO A MOWING APPARATUS HAVING A PAIR OF BLADES WHICH ROTATE ABOUT A VERTICAL AXIS. THE PERIPHERAL PORTIONS OF THE BLADE HAVE A HELICAL PERIPHERY. THE PERIPHERY OF EACH BLADE HAS TWO OPPOSED SLITS AND THE HELICAL PERIPHERY RISES FROM THE EDGE OF ONE SLIT TO THE EDGE OF THE OPPOSED SLIT. A KNIFE IS AFFIXED TO THE DISC PERIPHERY ADJACENT TO A SLIT AT THE LOWER HELICAL PORTION. THE BLADES OVERLAP SO THAT AT THE MOMENT THE HELICAL EDGES OF THE ADJACENT BLADES ARE ON THE SAME HORIZONTAL PLANE, THE HELICAL EDGE OF ONE BLADE RIDES IN A SLOT ON THE ADJACENT BLADE.
Inventors
- 👤 Wolfgang Eder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:36
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/64; A01D34/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |