LIFTING APPARATUS WITH A MECHANICAL LOCKING SYSTEM
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United States of America Patent
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Issued Date -
Mar 27, 2014
app pub date -
Mar 23, 2012
filing date -
Mar 30, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Lifting apparatus (1) provided with a raisable element (4) and a hydraulic system (5), which includes a mechanical locking system based on at least one lock element (7) articulately connected to a free end of a moving rod (5b) of the hydraulic system (5), where the lock element (7) includes an internal slot (8) through which a protuberance (9) attached to a fixed part (5a) of the hydraulic system (5) can move. The internal slot (8) is provided with at least one recess (10) in which the protuberance (9) may be lodged in order to lock the raisable element (4) in different positions. The centre of gravity of the lock element (7) is arranged in such a way that, in an unlock situation, an imaginary line that connects the centre of gravity with the articulated connection between the free end of the moving rod (5b) and the lock element (7) forms a certain angle with the vertical. The locking system locks itself automatically and is easy to use.
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