Global Patent Index - EP 0745427 B1

EP 0745427 B1 2000-05-10 - Monitoring device for ball mills

Title (en)

Monitoring device for ball mills

Title (de)

Ueberwachungsvorrichtung für Kugelmühlen

Title (fr)

Dispositif de surveillance d'un broyeur à boulets

Publication

EP 0745427 B1 (FR)

Application

EP 96401133 A

Priority

FR 9506523 A

Abstract (en)

[origin: EP0745427A1] The grinder has a cylindrical casing containing a number of balls which, when the grinder is rotating at its nominal speed, takes up a position between two generatrices spaced by an angle between a minimal angle alphamin and a maximal angle alphamax. An amount of coal is also included which, when the grinder is rotating at its nominal speed, takes up a position between two generatrices spaced by an angle beta. An electromagnetic wave emitter is disposed inside the grinder and at least one wave receiver is disposed outside the grinder. The receiver is associated with an electronic circuit for determining at least one parameter of the grinder selected from the quantity of balls, the quantity of coal and the wear of the cylinder.

IPC 1-7 (main, further and additional classification)

B02C 17/18; B02C 25/00

IPC 8 full level (invention and additional information)

B02C 17/18 (2006.01); B02C 25/00 (2006.01)

CPC (invention and additional information)

B02C 17/1805 (2013.01); B02C 25/00 (2013.01)

Designated contracting state (EPC)

AT BE DE DK ES GB IE IT NL SE

EPO simple patent family

EP 0745427 A1 19961204; EP 0745427 B1 20000510; AT 192670 T 20000515; CA 2177932 A1 19961202; CN 1142988 A 19970219; DE 69608163 D1 20000615; DE 69608163 T2 20001221; DK 0745427 T3 20001002; ES 2147905 T3 20001001; FR 2734739 A1 19961206; FR 2734739 B1 19970711; US 5698797 A 19971216; ZA 9507979 B 19960418

INPADOC legal status


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2003-03-19 [REG IE MM4A] PATENT LAPSED

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2000-10-02 [REG DK T3] TRANSLATION OF EP PATENT

2000-10-01 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2147905 T3

2000-08-02 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20000707

2000-07-25 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: JACOBACCI & PERANI S.P.A.

2000-06-15 [REF] CORRESPONDS TO:

- Document: DE 69608163 20000615

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2000-05-10 [REF] CORRESPONDS TO:

- Document: AT 192670 T 20000515

1999-07-07 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19990519

1999-06-16 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ALSTOM ENERGY SYSTEMS S.A.

1997-07-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19970527

1996-12-04 [AK] DESIGNATED CONTRACTING STATES:

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