US3109274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-piece rotary power blade
Assignee: Individual
•
Filing: 1959-12-18
•
Granted: 1963-11-05
•
Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 David P Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:23
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D2101/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A TWO-PIECE ROTARY POWER MOWER BLADE, THE COMBINATION WHICH COMPRISES A PAIR OF DUPLICATE BLADE SECTIONS, EACH OF SAID BLADE SECTIONS HAVING CUTTING EDGES ON OUTER PARTS OF LEADING SIDES THEREOF AND HAVING OVERLAPPING PORTIONS ON INNER ENDS, SAID OVERLAPPING PORTIONS OF THE BLADE SECTIONS HAVING CRANKSHAFT RECEIVING OPENINGS THERETHROUGH AND REGISTERING NODES AND INDENTATIONS ON AND IN MEETING SURFACES OF SAID OVERLAPPING PORTIONS, THE NODES AND INDENTATIONS BEING EQUALLY SPACED FROM CENTERS OF THE CRANKSHAFT RECEIVING OPENINGS, AND THE BLADE SECTIONS BEING OFFSET VERTICALLY TO COMPENSATE FOR THE THICKNESS OF THE MATERIAL OF THE SECTIONS, AND FRICTION WASHERS POSITIONED ON THE BLADE SECTIONS.
Claim 2
Dependent Claim
105 words
IN A TWO-PIECE ROTARY POWER MOWER BLADE, THE COMBINATION WHICH COMPRISES A PAIR OF DUPLICATE BLADE SECTIONS, EACH OF SAID BLADE SECTIONS HAVING CUTTING EDGES ON OUTER PARTS OF LEADING SIDES THEREOF AND HAVING OVERLAPPING PORTIONS ON INNER ENDS, SAID OVERLAPPING PORTIONS OF THE BLADE SECTIONS HAVING CRANKSHAFT RECEIVING OPENINGS THERETHROUGH AND REGISTERING NODES AND INDENTATIONS ON AND IN MEETING SURFACES OF SAID OVERLAPPING PORTIONS, THE NODES AND INDENTATIONS BEING EQUALLY SPACED FROM CENTERS OF THE CRANKSHAFT RECEIVING OPENINGS, AND THE BLADE SECTIONS BEING OFFSET VERTICALLY TO COMPENSATE FOR THE THICKNESS OF THE MATERIAL OF THE SECTIONS, AND FRICTION WASHERS POSITIONED ON THE BLADE SECTIONS.
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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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |