FALL-BACK PREVENTION PRESS
1 Assignment
0 Petitions
Accused Products
Abstract
Fall-back prevention press of a crane in the form of a gas pressure cylinder, with a piston rod engaging in a cylinder space of the gas pressure cylinder configured as piston-type accumulator, with gas in the bottom space of the cylinder being in exchange with the gas in the piston rod and the ring space in surrounding relationship to the piston rod. A seal arrangement in a rod guide of the cylinder seals the piston rod against the cylinder. The seal arrangement includes a lubricant groove which extends around the rod guide and via which the piston rod is lubricated on the outside. The lubricant is acted upon by gas pressure prevailing in the cylinder with interposition of a pressure transmitter.
11 Citations
10 Claims
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1-5. -5. (canceled)
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6. A fall-back prevention press of a crane, comprising:
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a gas pressure cylinder having a rod guide and a cylinder space which includes a bottom space and a ring space; a piston rod received in the cylinder space and configured as a piston-type accumulator in gas communication with the bottom space, said ring space of the gas pressure cylinder disposed in surrounding relationship to the piston rod and in gas communication with the bottom space; a seal arrangement provided in the rod guide of the gas pressure cylinder to seal the piston rod against the cylinder, said seal arrangement including a lubricant groove arranged circumferentially in the rod guide for lubricating an outside of the piston rod; and a pressure transmitter transmitting a gas pressure prevailing in the cylinder upon lubricant in the lubricant groove. - View Dependent Claims (7, 8, 9, 10)
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Specification