B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
115/22
B63H 5/10 (2006.01) B63H 23/32 (2006.01)
Patent
CA 1320665
Abstract A marine drive unit includes a lower gear case forming a torpedo housing . A pair of coaxial propeller shafts are rotatably mounted in the housing and carry a pair of propellers thereon. The propeller shafts are driven by a pair of opposed driving gears suitably connected through a generally vertical main drive shaft to a marine engine and mounted on the horizontal drive axis . A pair of thrust bearings adapted to carry forward thrust loads are respectively disposed adjacent the facing portions of the opposed driving gears, with the pair being separated by a spacer tightly confined therebetween. The spacer is locked against rotation but is freely floatable in an axial direction, and transfers the forward thrust load from one bearing to the other, so that the load is ultimately transferred from the outer propeller shaft to the inner central shaft . The result is to reduce the rotational speed of each thrust bearing, in this instance by half.
591924
Brunswick Corporation
Marks & Clerk
LandOfFree
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