US3776298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the pressure force in multi-roll drives for equipment withdrawing an ingot from a continuous casting machine along a curved path
Assignee: Vodafone GmbH
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Filing: 1972-06-29
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Granted: 1973-12-04
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Expires: 1992-06-29
Abstract
Abstract A withdrawal stand for continuously cast, curved ingots is disclosed wherein the contact pressure of driven rolls is controlled to normally exceed only slightly the internal pressure of the ingot; the contract pressure is increased if the traction resistance increases.
Inventors
- 👤 G Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:21
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/12; B22D11/128; B22D11/1282
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
In equipment for withdrawing a continuously cast ingot from a casting mold and along a curved withdrawal path and which includes a plurality of withdrawal rolls, some of which are being driven by motor means, and providing contact pressure upon the ingot withdrawn, there being hydraulic means for providing pressure force upon at least some of said rolls, the improvement comprising: first means responsive to the driving power as provided by at least some of the motor means to the respective driven withdrawal rolls and providing a control signal representative thereof; and pressure regulator means included in the hydraulic means and determining the hydraulic pressure which provides the pressure force for the contact pressure of at least some of said driven rolls, the pressure regulator means connected for receiving the control signal and for increasing said pressure force upon increase of the driving power needed by the motor means to cause the rolls to withdraw the ingot at a predetermined rate.
Claim 2
Dependent Claim
161 words
In equipment for withdrawing a continuously cast ingot from a casting mold and along a curved withdrawal path and which includes a plurality of withdrawal rolls, some of which are being driven by motor means, and providing contact pressure upon the ingot withdrawn, there being hydraulic means for providing pressure force upon at least some of said rolls, the improvement comprising: first means responsive to the driving power as provided by at least some of the motor means to the respective driven withdrawal rolls and providing a control signal representative thereof; and pressure regulator means included in the hydraulic means and determining the hydraulic pressure which provides the pressure force for the contact pressure of at least some of said driven rolls, the pressure regulator means connected for receiving the control signal and for increasing said pressure force upon increase of the driving power needed by the motor means to cause the rolls to withdraw the ingot at a predetermined rate.
Claim 3
Dependent Claim
38 words
The equipment of claim 1 wherein the motor means includes plural electric motors and the first means is responsive to the sum of the electric current flowing thzough the motors to provide the control signals as representation thereof.
Claim 4
Dependent Claim
31 words
The equipment as in claim 1, wherein the pressure regulator means includes a pressure regulator controlling the contact pressure of driven rolls arranged along the horizontal withdrawal path for the ingot.
References Cited (Backward Citations)
US3263284A
Cited
US3438425A
Cited
US3543830A
Cited
US3557865A
Cited
US3638713A
Cited
US3707180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |