HYDRAULIC AUXILIARY HOIST AND CRANE CONTROL FOR HIGH PRECISION LOAD POSITIONING

Title:

HYDRAULIC AUXILIARY HOIST AND CRANE CONTROL FOR HIGH PRECISION LOAD POSITIONING

Document Type and Number:

WIPO Patent Application WO2005094296

Kind Code:

A3

Abstract:

A hoist for positioning a load (40) includes a plurality of lift cylinders (15), a plurality of position sensors, a plurality of electronically controlled valves, a user input device (22), and a hoist controller (20). Each of the hydraulic hoist cylinders is coupled at one end to the hoist and at an opposite end to the load at a lifting point (45). Each of the position sensors is associated with one of the hoist cylinders and operable to provide position data for the associated hoist cylinder. The electronically controlled valves are hydraulically coupled to the hoist cylinders for extending and retracting the associated hoist cylinders. The user input device is operable by a user to specify load data. The hoist controller is operable to receive the load data from the input device and the position data from the position sensors and in response thereto to control the electronically controlled valves so as to position the load according to the load data.

Inventors:

GONZALEZ JESUS (ES)
SORDO LUIS (ES)

Application Number:

PCT/US2005/010302

Publication Date:

April 06, 2006

Filing Date:

March 28, 2005

Export Citation:

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Assignee:

ACTUANT CORP (US)
GONZALEZ JESUS (ES)
SORDO LUIS (ES)

International Classes:

B66C13/08; (IPC1-7): B66C13/04

Foreign References:

US6021911A	2000-02-08
US5022543A	1991-06-11
US5617964A	1997-04-08
US4191300A	1980-03-04

Other References: