US3240443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winder drive
Assignee: Oilgear Co
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Filing: 1964-03-30
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Granted: 1966-03-15
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Norbert J Nitka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:49
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/195; B65H23/1955
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
IN A HYDRAULIC TRANSMISSION FOR A WINDING ROLL AS DEFINED IN CLAIM 1 IN WHICH THE ELECTROHYDRAULIC CONTROL MEANS COMPRISES A SERVOMOTOR WHOSE DISPLACEMENT CONTROLS THE TORQUE OF A HYDRAULIC MOTOR DRIVING THE WINDER ROLL, SAID FIRST AND SECOND COMMOND SIGNAL TRANSMITTING MEANS BEING POSITIONED TO VOLTAGE TRANSDUCERS OPERABLE IN ACCORDANCE WITH ROLL DIAMETER AND HAVING OUTPUTS CONNECTED TO AN AMPLIFIER CONTROLLING THE SERVOMOTOR, A FEEDBACK SIGNAL TRANSMITTER PROVIDING A VOLTAGE SIGNAL THAT VARIES LINERALY WITH THE DISPLACEMENT OF THE SERVOMOTOR AND HAVING AN OUTPUT CONNECTED TO THE AMPLIFIER TO OPPOSE THE COMMAND SIGNALS, SAID FIRST SIGNAL TRANSMITTING MEANS PROVIDING A VOLTAGE THAT VARIES LINEARLY WITH ROLL DIAMETER AND SAID SECOND SIGNAL TRANSMITTING MEANS PROVIDING A VOLTAGE THAT VARIES AS THE SQUARE OF THE ROLL DIAMETER, THEREBY CONTROLLING MOTOR TORQUE SO AS TO DECREASE STRIP TENSION LINEARLY WITH INCREASE IN ROLL DIAMETER.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |