Patent US3358774A successfully refreshed from Google Patents.
US3358774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for regulating the depth of penetration of a tractordrawn plough
Assignee: Alex Friedmann KG
•
Filing: 1965-01-19
•
Granted: 1967-12-19
•
Expires: 1985-01-19
Abstract
No abstract record available.
Inventors
- 👤 Lipinski Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:14
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/11; A01B67/00; F; F02; F02D; F02D1/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A METHOD FOR REGULATING THE DEPTH OF PENETRATION OF A HYDRAULICALLY CONTROLLED PLOUGH DRAWN BY A TRACTOR HAVING AN INTERNAL-COMBUSTION ENGINE WITH FUEL INJECTION INCLUDING AN INJECTION PUMP HAVING A FUEL CARRYING CHAMBER, IN DEPENDENCE ON THE APPLIED TRACTIVE POWER OF THE TRACTOR AND PLOUGH MOVING MEANS OPERABLE TO LIFT AND TO LOWER SAID PLOUGH, THE STEPS COMPRISING SELECTING A PREDETERMINED FUEL DELIVERY RATE, SENSING THE PRESSURE CHANGE IN SAID FUEL CARRYING CHAMBER, AND TRANSMITTING SAID SENSED PRESSURE CHANGE TO SAID PLOUGH MOVING MEANS, WHEREBY, AN INCREASE OF THE TRACTIVE POWER WILL RESULT IN A CONTROL OF THE MOVEMENT OF THE PLOUGH IN THE LIFTING SENSE AND A DECREASE OF THE TRACTIVE POWER IN A MOVEMENT OF THE PLOUGH IN THE LOWERING SENSE.
Claim 2
Dependent Claim
124 words
IN A METHOD FOR REGULATING THE DEPTH OF PENETRATION OF A HYDRAULICALLY CONTROLLED PLOUGH DRAWN BY A TRACTOR HAVING AN INTERNAL-COMBUSTION ENGINE WITH FUEL INJECTION INCLUDING AN INJECTION PUMP HAVING A FUEL CARRYING CHAMBER, IN DEPENDENCE ON THE APPLIED TRACTIVE POWER OF THE TRACTOR AND PLOUGH MOVING MEANS OPERABLE TO LIFT AND TO LOWER SAID PLOUGH, THE STEPS COMPRISING SELECTING A PREDETERMINED FUEL DELIVERY RATE, SENSING THE PRESSURE CHANGE IN SAID FUEL CARRYING CHAMBER, AND TRANSMITTING SAID SENSED PRESSURE CHANGE TO SAID PLOUGH MOVING MEANS, WHEREBY, AN INCREASE OF THE TRACTIVE POWER WILL RESULT IN A CONTROL OF THE MOVEMENT OF THE PLOUGH IN THE LIFTING SENSE AND A DECREASE OF THE TRACTIVE POWER IN A MOVEMENT OF THE PLOUGH IN THE LOWERING SENSE.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |