Patent US2527420A successfully refreshed from Google Patents.
US3225542A
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Speed control system
Assignee: Oilgear Co
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Filing: 1964-03-16
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Granted: 1965-12-28
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Expires: 1984-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jack T Hansen
- 👤 Joseph W Broome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:48
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F15; F15B; F15B21/00; F16H61/47; G; G05; G05D; G05D13/00; H; H02; H02P; H02P23/00; H02P23/16; H02P5/00; H02P5/46; H02P5/48; H02P5/485; H02P5/50; H02P5/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A SPEED CONTROL UNIT FOR CONTROL OF THE SPEED OF AN OUTPUT MEMBER, SAID SPEED CONTROL UNIT COMPRISING (A) AN INNER SERVO LOOPED ARRANGED TO CONTROL THE SPEED OF SAID MEMBER, (B) A REFERENCE SOURCE PROVIDING A SERIES OF SIGNALS CORRESPONDING TO COMMANDED CHANGES IN THE POSITION OF SAID MEMBER, (C) AN OUTER SERVO LOOP INCLUDING (1) A GENERATOR PROVIDING A SERIES OF SIGNALS CORRESPONDING TO SUCCESSIVE CHANGES IN THE POSITION OF SAID MEMBER, (2) ACCUMULATING MEANS CONNECTED TO ACCUMULATE SIGNALS FROM SAID REFERENCE SOURCE AND SAID GENERATOR (A) WITH OPPOSITE SENSES AND
Claim 2
Dependent Claim
93 words
A SPEED CONTROL UNIT FOR CONTROL OF THE SPEED OF AN OUTPUT MEMBER, SAID SPEED CONTROL UNIT COMPRISING (A) AN INNER SERVO LOOPED ARRANGED TO CONTROL THE SPEED OF SAID MEMBER, (B) A REFERENCE SOURCE PROVIDING A SERIES OF SIGNALS CORRESPONDING TO COMMANDED CHANGES IN THE POSITION OF SAID MEMBER, (C) AN OUTER SERVO LOOP INCLUDING (1) A GENERATOR PROVIDING A SERIES OF SIGNALS CORRESPONDING TO SUCCESSIVE CHANGES IN THE POSITION OF SAID MEMBER, (2) ACCUMULATING MEANS CONNECTED TO ACCUMULATE SIGNALS FROM SAID REFERENCE SOURCE AND SAID GENERATOR (A) WITH OPPOSITE SENSES AND
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |