US3564824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mower blade
Assignee: Michigan Production Grinding Co
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Filing: 1969-05-05
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Granted: 1971-02-23
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Expires: 1989-05-05
Abstract
Abstract A ROTARY MOWER BLADE THAT IS UNIVERSALLY USABLE WITH ALL TYPES OF ROTARY MOWERS WHEREIN THE CENTRAL REGION OF THE BLADE INCLUDES A CIRCULAR HOLE WHICH MAY RECEIVE AN ADAPTER HAVING A SMALLER HOLE LOCATED THEREIN. THE BLADE INCLUDES SLOTS AND NOTCHES FOR PERMITTING THE BLADE TO BE MOUNTED UPON BLADE SHAFTS UTILIZING THIS TYPE OF CONNECTION FEATURE, AND NOTCHES ARE ALSO DEFINED IN THE PERIPHERY OF THE HOLE DEFINED IN THE BLADE CENTRAL REGION, AND IN THE ADAPTER PERIPHERY, FOR THE ACCOMMODATION OF ROTARY MOWERS UTILIZING PINS SPACED CLOSER TO THE AXIS OF THE BLADE ROTATION THAN PERMITS RECEPTION INTO THE BLADE SLOTS.
Inventors
- 👤 Robert L Tygh Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:23
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |