Hydraulic jack with a system for checking the position of...

Details Hydraulic jack with a system for checking the position of... Hydraulic jack with a system for checking the position of...

F - Mech Eng,Light,Heat,Weapons

15

B

254/148

F15B 15/28 (2006.01)

Patent

CA 1287342

-15- ABSTRACT OF THE DISCLOSURE In order to check the operation of high- voltage electric circuit-breakers, proximity detectors are housed in through-bores pierced in the wall of the hydraulic jack cylinder, the through-bores being dis- posed in spaced relation over a distance corresponding to the range of travel of the jack piston. Since no provision is made fox any piston ring or packing seal, the jack piston is not damaged as it passes against the outlets of the through-bores on the internal surface of the cylinder. The output signals of the proximity detectors are applied to a unit for measuring and controlling the position of the piston within the cylinder.

566012

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