Marine propulsion – Screw propeller – Self-clearing
Reexamination Certificate
2007-09-11
2011-11-22
Olson, Lars A (Department: 3617)
Marine propulsion
Screw propeller
Self-clearing
C416S14600A
Reexamination Certificate
active
08062083
ABSTRACT:
A line cutter1is fitted at a propeller2on a shaft3carried in a stern tube4. Clamped to the shaft immediately in front of the propeller is a rotatable cutting blade unit11comprising a split hub12, having two halves121, 122, one of which carries one rotating blade14and the other of which carries two further blades15. Bolts16clamp the halves to the shaft. A split collar17is clamped together and to the hub by bolts17aat a machined groove17bin the hub to provide a location groove18for a stationary cutting blade unit21. This assembly has a single blade22integral with a half ring23. A second half ring24is clipped by interlocking formations23a, 23bto the first half ring. The two half rings are accommodated in the location groove18, with the interposition of thrust washers18a, 18b.
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Ambassador Marine Limited
Meredith & Keyhani, PLLC
Meredith, Esq. Jennifer
Olson Lars A
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