Hoisting apparatus

Details Hoisting apparatus Hoisting apparatus

B - Operations, Transporting

66

B

187/6

B66B 11/04 (2006.01) B66B 9/04 (2006.01) B66B 15/08 (2006.01) F15B 15/08 (2006.01) F16J 15/40 (2006.01) F16J 15/56 (2006.01)

Patent

CA 1233421

- 24 - HOISTING APPARATUS Abstract of the Disclosure A hoisting apparatus comprising a hydraulic cylinder the piston whereof is connected to the load-handling attach- ment via a pliable member which passes through a sealing means that is located outside the cylinder and consists of two consecutively arranged chambers separated by seals. The chamber next to the cylinder is filled with a sealing fluid whose viscosity is higher than the viscosity of the hydraulic fluid and the other chamber is connected to a separator adapted to separate the hydraulic fluid from the sealing fluid and to feed them to the hydraulic cylinder and the chamber of the sealing means, respectively.

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