Robbie M Gunnlaugsson

US Patent:

61930865, Feb 27, 2001

Filed:

Mar 13, 1998

Appl. No.:

9/042325

Inventors:

Robbie M Gunnlaugsson - Sturgeon Bay WI
Thomas H. Feider - Sturgeon Bay WI

Assignee:

Marine Travelift, Inc. - Sturgeon Bay WI

International Classification:

B66C 1354

US Classification:

212290

Abstract:

A crane is disclosed, with one or more moveable components. Manually-articulable controls (such as joysticks) are provided for controlling movement of the components. First, second, and third control circuits responsive to varied positions of the control are optionally connected to the control to provide first, second, and third sets of control signals each with differing responses to the control in a given position so as to move the components in a manner which mitigates instability or inaccuracy due to the physical acuity of the operator.