Patent US3211251A successfully refreshed from Google Patents.
US3211251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle road speed control system
Assignee: Motors Liquidation Co
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Filing: 1962-04-24
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Granted: 1965-10-12
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Expires: 1982-04-24
Abstract
No abstract record available.
Inventors
- 👤 Leland C Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:29
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/06; B60T; B60T11/00; B60T11/10; B60T11/103; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
MECHANISM FOR PRODUCING A FLUID PRESSURE SPEED ERROR SIGNAL HAVING A PREDETERMINED VARIABLE ZERO SPEED ERROR VALUE VARYING IN ACCORDANCE WITH THE SPEED OF AN ELEMENT, SAID MECHANISM COMPRISING, A FLUID PRESSURE GENERATOR DRIVEN IN ACCORDANCE WITH THE SPEED OF SAID ELEMENT AND PRODUCING A FLUID PRESSURE REFLECTING ELEMENT SPEED, MEANS SENSING THE FLUID PRESSURE GENERATED BY SAID GENERATOR AND WITHIN A RANGE OF FLUID PRESSURE GENERATION AND MODIFYING THE GENERATED FLUID PRESSURE IN ACCORDANCE WITH CHANGES IN THE GENERATED FLUID PRESSURE, AND MEANS FOR FURTHER MODIFYING THE MODIFIED FLUID PRESSURE INCLUDING PRESSURE VENTING MEANS SET AT A PREDETERMINED ELEMENT SPEED TO PRODUCE A FLUID PRESSURE REFLECTIVE OF SPEED ERROR.
Claim 2
Dependent Claim
110 words
MECHANISM FOR PRODUCING A FLUID PRESSURE SPEED ERROR SIGNAL HAVING A PREDETERMINED VARIABLE ZERO SPEED ERROR VALUE VARYING IN ACCORDANCE WITH THE SPEED OF AN ELEMENT, SAID MECHANISM COMPRISING, A FLUID PRESSURE GENERATOR DRIVEN IN ACCORDANCE WITH THE SPEED OF SAID ELEMENT AND PRODUCING A FLUID PRESSURE REFLECTING ELEMENT SPEED, MEANS SENSING THE FLUID PRESSURE GENERATED BY SAID GENERATOR AND WITHIN A RANGE OF FLUID PRESSURE GENERATION AND MODIFYING THE GENERATED FLUID PRESSURE IN ACCORDANCE WITH CHANGES IN THE GENERATED FLUID PRESSURE, AND MEANS FOR FURTHER MODIFYING THE MODIFIED FLUID PRESSURE INCLUDING PRESSURE VENTING MEANS SET AT A PREDETERMINED ELEMENT SPEED TO PRODUCE A FLUID PRESSURE REFLECTIVE OF SPEED ERROR.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |