Questions about bottle jack

  1. What device limits the cylinder extension?
2.What device allows for the cylinder retraction? 3.What is the reservoir?
  1. What methods are used for cylinder and piston sealing? Explain about the relief valve in bottle jack?
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The piston.

You open the bleed valve, and allow what is behind the piston to bleed back into the reservoir.

Depends on the construction. Might be in part, the rod side of the cylinder.

Standard cylinder seals, usually.

Connected on parallel with the bleed valve, if it has a relief valve.

Here is a good cutaway...

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David A. Smith

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