US3264959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paving machine slope control system
Assignee: Preco LLC
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Filing: 1963-08-06
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Granted: 1966-08-09
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Expires: 1983-08-06
Abstract
No abstract record available.
Inventors
- 👤 Reeford P Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:05
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4833; E01C19/4853; E01C19/486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
IN A SLOPE CONTROL APPARATUS FOR A PAVING MACHINE HAVING A SCREED MOVABLY CONNECTED TO A PRIME MOVER AND OPERABLE MEANS FOR INDEPENDENTLY VARYING THE ANGLE OF ATTACK OF EACH LATERAL END PORTION OF THE SCREED, THE COMBINATION OF: FIRST SENSING MEANS OPERATIVELY CONNECTED TO THE SCREED FOR REGISTERING A VALUE OF TRANSVERSE INCLINATION CORRESPONDING TO A COMBINATION OF THE ACTUAL TRANSVERSE INCLINATION OF THE SCREED AND THE ANGLES OF ATTACK OF BOTH END PORTIONS OF THE SCREED, SECOND SENSING MEANS OPERATIVELY CONNECTED TO THE TRAILING EDGE OF THE SCREED FOR REGISTERING A VALUE OF TRANSVERSE INCLINATION EQUAL TO THE TRANSVERSE INCLINATION OF THE TRAILING EDGE OF THE SCREED, MEANS RESPONSIVE TO SAID FIRST SENSING MEANS AND A PRESELECTED VALUE OF DESIRED TRANSVERSE SLOPE FOR PRODUCING A SIGNAL FOR ADJUSTING SAID OPERABLE MEANS TO MODIFY THE ANGLE OF ATTACK OF SAID SCREED IN A MANNER TO REDUCE THE DIFFERENCE BETWEEN REGISTERED TRANSVERSE INCLINATION AND DESIRED TRANSVERSE SLOPE, CONTROL MEANS FOR MODIFYING THE SAID FIRST INCLINATION-SLOPE DIFFERENCE, AND SECOND MEANS RESPONSIVE TO SAID SECOND SENSING MEANS AND THE PRESELECTED VALUE OF DESIRED TRANSVERSE SLOPE FOR PRODUCING A SECOND SIGNAL OF THIS SECOND INCLINATION-SLOPE DIFFERENCE BETWEEN REGISTERED TRANSVERSE INCLINATION AND DESIRED TRANSVERSE SLOPE FOR ADJUSTING SAID CONTROL MEANS TO MODIFY THE FIRST INCLINATION-SLOPE DIFFERENCE IN THE DIRECTION OF SAID SECOND INCLINATION-SLOPE DIFFERENCE.
Claim 2
Dependent Claim
220 words
IN A SLOPE CONTROL APPARATUS FOR A PAVING MACHINE HAVING A SCREED MOVABLY CONNECTED TO A PRIME MOVER AND OPERABLE MEANS FOR INDEPENDENTLY VARYING THE ANGLE OF ATTACK OF EACH LATERAL END PORTION OF THE SCREED, THE COMBINATION OF: FIRST SENSING MEANS OPERATIVELY CONNECTED TO THE SCREED FOR REGISTERING A VALUE OF TRANSVERSE INCLINATION CORRESPONDING TO A COMBINATION OF THE ACTUAL TRANSVERSE INCLINATION OF THE SCREED AND THE ANGLES OF ATTACK OF BOTH END PORTIONS OF THE SCREED, SECOND SENSING MEANS OPERATIVELY CONNECTED TO THE TRAILING EDGE OF THE SCREED FOR REGISTERING A VALUE OF TRANSVERSE INCLINATION EQUAL TO THE TRANSVERSE INCLINATION OF THE TRAILING EDGE OF THE SCREED, MEANS RESPONSIVE TO SAID FIRST SENSING MEANS AND A PRESELECTED VALUE OF DESIRED TRANSVERSE SLOPE FOR PRODUCING A SIGNAL FOR ADJUSTING SAID OPERABLE MEANS TO MODIFY THE ANGLE OF ATTACK OF SAID SCREED IN A MANNER TO REDUCE THE DIFFERENCE BETWEEN REGISTERED TRANSVERSE INCLINATION AND DESIRED TRANSVERSE SLOPE, CONTROL MEANS FOR MODIFYING THE SAID FIRST INCLINATION-SLOPE DIFFERENCE, AND SECOND MEANS RESPONSIVE TO SAID SECOND SENSING MEANS AND THE PRESELECTED VALUE OF DESIRED TRANSVERSE SLOPE FOR PRODUCING A SECOND SIGNAL OF THIS SECOND INCLINATION-SLOPE DIFFERENCE BETWEEN REGISTERED TRANSVERSE INCLINATION AND DESIRED TRANSVERSE SLOPE FOR ADJUSTING SAID CONTROL MEANS TO MODIFY THE FIRST INCLINATION-SLOPE DIFFERENCE IN THE DIRECTION OF SAID SECOND INCLINATION-SLOPE DIFFERENCE.
References Cited (Backward Citations)
US3029716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |