The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 1998
Filed:
Jan. 24, 1995
Thomas Feider, Sturgeon Bay, WI (US);
Norbert Lenius, Sturgeon Bay, WI (US);
Marine Travelift, Inc., Sturgeon Bay, WI (US);
Abstract
A gantry crane 10 is provided having a gantry structure 12 with a pair of front support legs 18 and 20 and a pair of rear support legs 26 and 28. A lift frame 14, having opposed first and second ends 14a and 14b, is suspended from the gantry structure 12. A stabilizing beam 68 operatively connects the lift frame 14 to the gantry structure 12 to prevent sway of the lift frame 14. The stabilizing beam 68 is positioned between the pair of front support legs 18 and 20 and the pair of rear support legs 26 and 28. Preferably, the stabilizing beam 68 is connected proximate a longitudinal center of the lift frame 14. The stabilizing beam 68 is connected to vertical guides 70 and 72 that are connected to the gantry structure 12 so as to be vertically moveable along the guides 70 and 72. A four corner cross-reeving/clutch system 79 is provided to dampen rotational sway of the ends 14a and 14b of the lift frame 14. A gimbal 100 is provided for connecting the stabilizing beam 68 to the lift frame 14 to permit rotation of the lift frame 14 in a horizontal plane about a vertical axis, and rotation of the lift frame about a horizontal axis. The connection between the stabilizing beam 68 and vertical guides 70 and 72 allow the lift frame 14 to rotate within a vertical plane.