Patent ID: 11912543
Assignee: SUPERIOR GEARBOX COMPANY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A boat lift, comprising:
a drive motor having a drive shaft;
a first worm screw operably connected to the drive shaft and defining an axis of rotation aligned with the drive shaft, the first worm screw including a first worm gear, the first worm screw and the first worm gear defining a first lifting stage;
a second worm screw operably connected to the first worm gear and including a second worm gear, the second worm screw and the second worm gear defining a second lifting stage adapted to engage to a spool defining a third lifting stage; and
a tapered roller bearing assembly operably engaged with the second worm screw for reducing mechanical noise during rotation of the second worm screw; the tapered roller bearing assembly comprises:
a first tapered roller bearing secured at a first location proximate a first end of the second worm screw and provides support between the first lifting stage and the second lifting stage; and
a second tapered roller bearing secured at a second location proximate a second end of the second worm screw opposite to the first end and provides support between the second lifting stage and the third lifting stage;
wherein the first tapered roller bearing and the second tapered rolling bearing face one another on the second worm screw and provide equal rolling torque to the second worm screw.