Patent ID: 11951517
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 7:
8. The apparatus according to claim 6, wherein:
the nozzle drive unit has a nozzle drive shaft to which a first gear is attached, which first gear cooperates with a second gear that is attached to the nozzle shaft,
at least one of the first and second gears is provided with gear teeth along only a portion of the circumference thereof,
a third gear is attached to the nozzle drive shaft, which third gear cooperates with a fourth gear that is attached to the nozzle shaft,
at least one of the third and fourth gears is provided with gear teeth along only a portion of the circumference thereof,
the first and second gears mesh with each other within the cleaning angle, and
the third and fourth gears mesh with each other outside the cleaning angle.