FIELD: manufacturing technology.
SUBSTANCE: invention relates to mechanisms for lifting heavy loads. Pneumatic jack contains a working volume enclosed in a sealed high-strength elastic shell located inside a conical compression spring, capable of being fully compressed in the form of a spiral in one plane and equipped at the edges with generic bases with an elastic shell. Spring coils can have any desired cross-sectional shape and configuration. In the position of its greatest extension, the jack has the form of a truncated cone, in which, during compression, the shell surface is freely and evenly distributed outward between the spring coils. Rigid upper base has a groove for reliable contact with the vehicle body, and the lower one is equipped with a gliding-free surface.
EFFECT: weight and dimensions of the jack are reduced.
4 cl, 2 dwg
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