US3303890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spading machine
Assignee: Herbert Vissers BV
•
Filing: 1965-04-09
•
Granted: 1967-02-14
•
Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 Herbert Vissers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:16
CPC Classifications
A; A01; A01B; A01B9/00; A01B59/00; A01B59/06; A01B73/00; A01B73/02; A01B73/04; A01B73/044; A01B9/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SPADING MACHINE COMPRISING A TRACTOR HAVING FRONT AND REAR WHEELS, AN ENGINE AND A DRIVEN SHAFT, A PLURALITY OF SPADING UNITS FOR TRAVELING IN SPADING CONTACT WITH THE GROUND, A FIRST TRANSMISSION MEANS CONNECTING SAID SPADING UNITS TO SAID DRIVEN SHAFT, A SECOND TRANSMISSION MEANS FOR DRIVING AT LEAST TWO TRACTOR WHEELS, AT LEAST TWO OF SAID SPADING UNITS BEING LIFTABLY MOUNTED ON OPPOSITE SIDES OF THE TRACTOR FORWARDLY OF THE REAR WHEELS, EACH SAID SIDE UNIT BEING SUSPENDED AT ITS MIDDLE PORTION BY A FIRST PIVOT TO AN ARM WHICH IN TURN IS CONNECTED TO THE TRACTOR BY A SECOND PIVOT, THE AXES OF BOTH PIVOTS BEING SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE TRACTOR, BOTH SAID SIDE UNITS WHEN LOWERED BEING POSITIONED COM-
Claim 2
Dependent Claim
127 words
A SPADING MACHINE COMPRISING A TRACTOR HAVING FRONT AND REAR WHEELS, AN ENGINE AND A DRIVEN SHAFT, A PLURALITY OF SPADING UNITS FOR TRAVELING IN SPADING CONTACT WITH THE GROUND, A FIRST TRANSMISSION MEANS CONNECTING SAID SPADING UNITS TO SAID DRIVEN SHAFT, A SECOND TRANSMISSION MEANS FOR DRIVING AT LEAST TWO TRACTOR WHEELS, AT LEAST TWO OF SAID SPADING UNITS BEING LIFTABLY MOUNTED ON OPPOSITE SIDES OF THE TRACTOR FORWARDLY OF THE REAR WHEELS, EACH SAID SIDE UNIT BEING SUSPENDED AT ITS MIDDLE PORTION BY A FIRST PIVOT TO AN ARM WHICH IN TURN IS CONNECTED TO THE TRACTOR BY A SECOND PIVOT, THE AXES OF BOTH PIVOTS BEING SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE TRACTOR, BOTH SAID SIDE UNITS WHEN LOWERED BEING POSITIONED COM-
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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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |