Spring devices – Fluid – Expansible-contractible chamber device
Patent
1988-03-10
1989-05-23
Butler, Douglas C.
Spring devices
Fluid
Expansible-contractible chamber device
188282, 188300, 18832215, 188317, 267 6412, 267 6415, 267 6426, 267124, 293134, F16F 500, F16F 900
Patent
active
048323187
ABSTRACT:
The invention discloses a lifting telescoping tube which comprises a first tube receiving a pressure liquid, a second tube filled with a pressure gas, a first piston affixed to one open end of the second tube having a first through-passage and a second through-passage intercommunicating the first and second tubes, a check valve disposed in the second through-passage for preventing the pressure liquid from flowing into the first tube from the second tube, a second piston provided in the second tube dividing the second tube into a variable-volume liquid chamber and a variable-volume gas chamber.
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patent: 4629167 (1986-12-01), Kimura et al.
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