US3338039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutting blade
Assignee: Individual
•
Filing: 1963-11-19
•
Granted: 1967-08-29
•
Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Robert G Nightingale
- 👤 Jack W Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:13
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D2101/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
A CUTTING BLADE FOR A ROTARY-TYPE MOWER COMPRISING AN ANNULAR DISC HAVING A CENTRAL OPENING FOR ACCOMMODATING A DRIVING SHAFT OF SAID MOTOR FOR ROATAION OF THE BLADE BY SAID SHAFT, SAID DISC HAVING A RIM PORTION EXTENDING AROUND THE CIRCUMFERENCE THEREOF, SAID RIM PORTION HAVING OPPOSITE AXIALLY SPACED EDGES, SAID DISC HAVING A BODY PORTION DISPOSED RADIALLY INWARD FROM SAID RIM PORTION AND DISPOSED IN A PLANE INTERMEDIATE, SPACED FROM AND GENERALLY PARALLEL TO PLANES PASSING THROUGH THE SAID OPPOSITE AXIALLY SPACED EDGES OF SAID RIM, SAID BODY PORTION HAVING A PLURALITY OF OPEN SPACES EXTENDING THERETHROUGH IN AN AXIAL DIRECTION, EACH SAID OPEN SPACE HAVING A LEADING EDGE AND A TRAILING EDGE IN THE DIRECTION OF CUTTING ROTATION OF THE BLADE, EACH SAID TRAILING EDGE BEING SUBSTANTIALLY IN SAID INTERMEDIATE PLANE OF SAID BODY PORTION FORMING A CUTTING EDGE OF CUTTING VEGETATAION UPSTANDING IN SAID OPEN SPACE DURING ROTATION OF THE BLADE, EACH SAID LEADING EDGE BEING DISPLACED FROM THE PLANE OF SAID BODY PORTION UPWARDLY TOWARD, THROUGH THE EDGE OF SAID RIM HORIZONTAL PLANE PASSING THROUGH THE EDGE OF SAID RIM PORTION DISPOSED UPWARDLY IN THE OPERATING POSITION OF SAID BLADE, SAID BODY PORTION EXTENDING FROM SAID LEADING EDGE DOWNWARDLY TO SAID INTERMEDIATE PLANE TO PROVIDE
Claim 2
Dependent Claim
209 words
A CUTTING BLADE FOR A ROTARY-TYPE MOWER COMPRISING AN ANNULAR DISC HAVING A CENTRAL OPENING FOR ACCOMMODATING A DRIVING SHAFT OF SAID MOTOR FOR ROATAION OF THE BLADE BY SAID SHAFT, SAID DISC HAVING A RIM PORTION EXTENDING AROUND THE CIRCUMFERENCE THEREOF, SAID RIM PORTION HAVING OPPOSITE AXIALLY SPACED EDGES, SAID DISC HAVING A BODY PORTION DISPOSED RADIALLY INWARD FROM SAID RIM PORTION AND DISPOSED IN A PLANE INTERMEDIATE, SPACED FROM AND GENERALLY PARALLEL TO PLANES PASSING THROUGH THE SAID OPPOSITE AXIALLY SPACED EDGES OF SAID RIM, SAID BODY PORTION HAVING A PLURALITY OF OPEN SPACES EXTENDING THERETHROUGH IN AN AXIAL DIRECTION, EACH SAID OPEN SPACE HAVING A LEADING EDGE AND A TRAILING EDGE IN THE DIRECTION OF CUTTING ROTATION OF THE BLADE, EACH SAID TRAILING EDGE BEING SUBSTANTIALLY IN SAID INTERMEDIATE PLANE OF SAID BODY PORTION FORMING A CUTTING EDGE OF CUTTING VEGETATAION UPSTANDING IN SAID OPEN SPACE DURING ROTATION OF THE BLADE, EACH SAID LEADING EDGE BEING DISPLACED FROM THE PLANE OF SAID BODY PORTION UPWARDLY TOWARD, THROUGH THE EDGE OF SAID RIM HORIZONTAL PLANE PASSING THROUGH THE EDGE OF SAID RIM PORTION DISPOSED UPWARDLY IN THE OPERATING POSITION OF SAID BLADE, SAID BODY PORTION EXTENDING FROM SAID LEADING EDGE DOWNWARDLY TO SAID INTERMEDIATE PLANE TO PROVIDE
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) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |