Patent US3303589A successfully refreshed from Google Patents.
US3303589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control device for road graders and the like
Assignee: Individual
•
Filing: 1964-04-27
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Granted: 1967-02-14
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Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 Rivinius Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A ROAD GRADE OR THE LIKE HAVING AN EARTH WORKING BLADE, POWER MEANS OPERABLE TO CONTROL THE ANGULAR POSITION OF SAID BLADE WITH RESPECT TO A HORIZONTAL PLANE, AND AN ELEMENT FOR SENSING THE RELATIONSHIP OF THE CUTTING EDGE OF THE EARTH WORKING BLADE WITH RESPECT TO A REFERENCE PLANE, THE IMPROVEMENT COMPRISING A CONTROL CIRCUIT OPERABLE IN RESPONSE TO SAID ELEMENT AND CONTROLLING SAID POWER MEANS, AND INTERRUPTER MEANS IN SAID CONTROL CIRCUIT TO ALTERNATELY DISABLE SAID POWER MEANS AND PERMIT SAID POWER MEANS TO OPERATE WHEN THE CONTROL CIRCUIT IS ENERGIZED THEREBY GIVING A PULSATING ACTION TO SAID POWER MEANS.
Claim 2
Dependent Claim
103 words
IN A ROAD GRADE OR THE LIKE HAVING AN EARTH WORKING BLADE, POWER MEANS OPERABLE TO CONTROL THE ANGULAR POSITION OF SAID BLADE WITH RESPECT TO A HORIZONTAL PLANE, AND AN ELEMENT FOR SENSING THE RELATIONSHIP OF THE CUTTING EDGE OF THE EARTH WORKING BLADE WITH RESPECT TO A REFERENCE PLANE, THE IMPROVEMENT COMPRISING A CONTROL CIRCUIT OPERABLE IN RESPONSE TO SAID ELEMENT AND CONTROLLING SAID POWER MEANS, AND INTERRUPTER MEANS IN SAID CONTROL CIRCUIT TO ALTERNATELY DISABLE SAID POWER MEANS AND PERMIT SAID POWER MEANS TO OPERATE WHEN THE CONTROL CIRCUIT IS ENERGIZED THEREBY GIVING A PULSATING ACTION TO SAID POWER MEANS.
References Cited (Backward Citations)
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Cited
US2636290A
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US2904911A
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US2961783A
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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 |