Patent US3943992A successfully refreshed from Google Patents.
US3943992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled-pouring apparatus for metal casting
Assignee: Maschinenfabrik and Eisengiesserei Ed Mezger AG
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Filing: 1975-02-06
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Granted: 1976-03-16
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Expires: 1995-02-06
Abstract
Abstract An apparatus for an installation in which molten metal is poured in a mold comprises a sensor movable upwardly and downwardly by means of a servomechanism automatically controlled by electric circuit means so that, when pouring has begun, the lower end of an electric sensor follows the surface level of the metal in the pouring gate of the mold. A control device is operated in dependence with the movements of the sensor for causing the metal to be poured as a function of the surface level in the pouring gate.
Inventors
- 👤 Fritz Mezger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:32
CPC Classifications
B; B22; B22D; B22D39/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
214 words
An apparatus for a casting installation, for controlled pouring of molten metal during casting in a movable mold having a pouring gate, comprising a receptacle for said metal and a sensor having a lower end, said sensor being movable from a resting position, in which it is situated outside the range of movement of said mold at the location provided for pouring, into an operating range, in which said lower end projects into said pouring gate, and further comprising a servomechanism, electric circuit means including said sensor, motor means, and a control device including means for supporting said sensor, said servomechanism being automatically controlled by said circuit means for moving said sensor up and down within said operating range and, after pouring has begun, for causing said lower end to follow up the surface level of said metal in said pouring gate and thus intermittently to effect short-stroke up-and-down movements with respect to said surface level so as to be alternately in and out of electrically conductive contact with said metal in said pouring gate, and said motor means being controlled by said control device for causing said metal to be poured from said receptacle into said pouring gate as a function of said surface level sensed in said pouring gate by said sensor.
Claim 2
Independent Claim
214 words
An apparatus for a casting installation, for controlled pouring of molten metal during casting in a movable mold having a pouring gate, comprising a receptacle for said metal and a sensor having a lower end, said sensor being movable from a resting position, in which it is situated outside the range of movement of said mold at the location provided for pouring, into an operating range, in which said lower end projects into said pouring gate, and further comprising a servomechanism, electric circuit means including said sensor, motor means, and a control device including means for supporting said sensor, said servomechanism being automatically controlled by said circuit means for moving said sensor up and down within said operating range and, after pouring has begun, for causing said lower end to follow up the surface level of said metal in said pouring gate and thus intermittently to effect short-stroke up-and-down movements with respect to said surface level so as to be alternately in and out of electrically conductive contact with said metal in said pouring gate, and said motor means being controlled by said control device for causing said metal to be poured from said receptacle into said pouring gate as a function of said surface level sensed in said pouring gate by said sensor.
Claim 3
Dependent Claim
40 words
An apparatus in accordance with claim 1, wherein said servomechanism comprises a double-acting hydraulic piston-and-cylinder unit and an electromagnetically operatable selector valve controlled by said circuit means for alternately injecting pressure fluid into one or another chamber of said unit.
Claim 4
Dependent Claim
21 words
An apparatus in accordance with claim 2, wherein said servomechanism comprises an adjustable throttling member connected in before said selector valve.
Claim 5
Dependent Claim
26 words
An apparatus in accordance with claim 1, wherein said receptacle is a tilting lip-pour ladle adapted to be tilted over and back by said motor means.
Claim 6
Dependent Claim
27 words
An apparatus in accordance with claim 1, wherein said receptacle is a bottom-pour ladle having a stopper adapted to be raised and lowered by said motor means.
References Cited (Backward Citations)
US1469224A
Cited
US2548696A
Cited
US2741006A
Cited
US3188704A
Cited
US3378061A
Cited
US3353586A
Cited
US3591052A
Cited
US3659644A
Cited
DE2108000A1
Cited
US3692091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |