Par Systems, Inc.

Dale Hengel

William R Johanek

A lift assembly is provided for a platform such as used on a ship. The platform can have four spaced apart hitch points. In one embodiment, the lift assembly includes four trolley drive assemblies, each trolley drive assembly including a trolley guidable along a guide rail, and a drive configured to displace the trolley along the guide rails, each trolley being coupled to at least one hitch point. In a second embodiment, a tension leveling assembly is provided in a trolley drive assembly and is configured to couple each of the wire ropes to the trolley and maintain substantially the same amount of tension in each wire rope. In a third embodiment, the lift assembly can be provided on a ship that also includes a vessel for holding water. The lift assembly includes an electric drive that operates as generator and generates current during lowering of the platform, A resistive device is disposed in the vessel and connected to the drive to receive current, the resistive device being configured to dissipate heat into the vessel.

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Minneapolis, MN, United States of America

Dale Hengel