| (19) |
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(11) |
EP 0 167 178 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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12.11.1986 Bulletin 1986/46 |
| (43) |
Date of publication A2: |
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08.01.1986 Bulletin 1986/02 |
| (22) |
Date of filing: 17.12.1982 |
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| (84) |
Designated Contracting States: |
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AT BE CH DE FR GB LI LU NL SE |
| (30) |
Priority: |
19.12.1981 GB 8138347
11.09.1982 GB 8225977
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| (71) |
Applicant: MMD DESIGN AND CONSULTANCY LIMITED |
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(57) A mineral breaker including a pair of side by side breaker drums each having breaker
teeth projecting radially there- 'from, the teeth on each drum being arranged in circumferentially
extending groups of teeth, the groups of teeth on one drum being located between adjacent
groups of teeth on the other drum, the teeth on at least one of said pair of drums
being arranged to define a series of discrete circumferentially spaced helical formations
extending along the drum.