Bottle jack
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United States of America Patent
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Jun 6, 2017
Grant Date -
May 5, 2016
app pub date -
May 20, 2014
filing date -
May 20, 2013
priority date (Note) -
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Abstract
The present invention relates to a bottle jack comprising a main body and a shaft that expands or contracts, further comprising:
- a passage space communicating a hydraulically operated circuit with an unloading circuit through which the controlled outlet of hydraulic fluid from the hydraulically operated circuit and subsequent lowering of the shaft occur;a closure element elastically pushed towards the passage space to prevent the outlet of hydraulic fluid therethrough;a ram assembly elastically pushed in the longitudinal backward movement direction (B) with a force greater than the force with which the closure element is elastically pushed against the passage space; anda telescopic lever assembly which can be lowered by a user to operate the hydraulically operated system.
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