Rotating jack winch
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 2, 2003
Grant Date -
Jul 4, 2002
app pub date -
Dec 11, 2001
filing date -
Dec 11, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A device for heaving in and paying out a chain by means of a hydraulic cylinder which by means of gripping devices engages the chain and lifts or lowers the chain a given distance while the locking device is deactivated. The structure comprises a frame provided with a lower locking device, a chain wheel guiding the chain, and an upper gripping device mounted in a bracket which is connected to the rod head of the hydraulic cylinder and the central axle of the chain wheel. The lower locking device is formed by two pawls which are pivotally mounted on separate pins. These pawls engage under a chain link and hold it securely. The upper gripping device is formed by at least one pawl which, together with a chain wheel having pockets for the chain, engages under a vertical chain link. In order for the gripping device to be able to lift or lower the chain, the hydraulic cylinder has a pivotal attachment supported in the frame, and the end of its piston rod has a head that can be supported on the same pivot pin as the pawl of the gripping device, or on a separate pivot pin.
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