US3299547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor leveling device for earthmoving scrapers
Assignee: Caterpillar Inc
•
Filing: 1964-06-29
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Granted: 1967-01-24
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 James E Gee
- 👤 Frank H Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:28
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/651; E02F3/6454; E02F3/652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A TRACTOR LEVELING DEVICE FOR A TWO AXLE TRACTOR SCRAPER COMBINATION IN WHICH THE TRACTOR AND SCRAPER ARE HINGEDLY CONNECTED ABOUT A HORIZONTAL PIVOT COMPRISING MEANS TO IMPART TILTING MOVEMENT TO THE TRACTOR ABOUT ITS AXLE, MEANS TO ADJUST THE SCRAPER VERTICALLY AND MEANS OPERABLE AUTOMATICALLY UPON VERTICAL ADJUSTMENT OF THE SCRAPER AND IN RESPONSE TO RESULTING VARIATION IN THE ANGLE BETWEEN THE TRACTOR AND THE SCRAPER TO ACTIVATE THE
Claim 2
Dependent Claim
70 words
A TRACTOR LEVELING DEVICE FOR A TWO AXLE TRACTOR SCRAPER COMBINATION IN WHICH THE TRACTOR AND SCRAPER ARE HINGEDLY CONNECTED ABOUT A HORIZONTAL PIVOT COMPRISING MEANS TO IMPART TILTING MOVEMENT TO THE TRACTOR ABOUT ITS AXLE, MEANS TO ADJUST THE SCRAPER VERTICALLY AND MEANS OPERABLE AUTOMATICALLY UPON VERTICAL ADJUSTMENT OF THE SCRAPER AND IN RESPONSE TO RESULTING VARIATION IN THE ANGLE BETWEEN THE TRACTOR AND THE SCRAPER TO ACTIVATE THE
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |