Patent ID: 11891157
Assignee: WAVETAMER LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  F  G  Y | IPC B  F  G  H

Claim 4:
5. A gyroscopic roll stabilizer for a boat, said gyroscopic stabilizer comprising:
an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure;
a flywheel assembly including a flywheel and flywheel shaft, said flywheel assembly having a moment of inertia greater than 11.7 kg·m2 (40,000 lbm·in2); the flywheel assembly configured to precess relative to the gimbal axis, when unlocked, in response to roll of the boat;
one or more bearings for rotatably mounting the flywheel assembly inside the enclosure;
a motor for rotating the flywheel assembly, said motor configured to accelerate the flywheel assembly at an acceleration rate of at least 2.5 rpm/s to a normal operating speed of at least 6000 rpm; and
a bearing cooling system effective to cool the one or more bearings at the acceleration rate;
wherein the gyroscopic roll stabilizer is configured to lock the flywheel assembly at the start of acceleration and to unlock the flywheel assembly when the speed of the flywheel assembly reaches 75% of the normal operating speed.