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US 4,707,912 AGranted
Crash protection apparatus for a device for pulling a tube out of a tube sheet of a heat exchanger
AssigneeBrown Boveri Reaktor GmbH
InventorHans Haller
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AssigneeBrown Boveri Reaktor GmbH
InventorHans Haller
Estimating the term…
A crash protection apparatus for a pulling device having a hollow piston cylinder and a pulling claw for pulling a tube out of a tube sheet of a heat exchanger chamber in which the pulling device is disposed, the crash protection apparatus includes another cylinder without a piston rod having an axis substantially parallel to the axis of the hollow-piston cylinder and being fixed relative to the tube sheet in the chamber, a piston of the other cylinder, a bracket extending from the piston substantially at a right angle to the axis of the other cylinder for supporting the pulling device with a supporting force provided by the other cylinder, and a device for controlling the supporting force for compensating only the weight of the pulling device in each position of the pulling device.
Crash protection apparatus for a pulling device having a first hollow-piston cylinder and a pulling claw for pulling a tube out of a tube sheet of a heat exchanger chamber in which the pulling device is disposed, the crash protection apparatus comprising a second cylinder without a piston rod having an axis substantially parallel to the axis of the first hollow-piston cylinder and being fixed relative to the tube sheet in the chamber, a piston of said second cylinder, a bracket extending from said piston substantially at a right angle to the axis of said second cylinder for supporting the pulling device with a supporting force provided by said other cylinder, and means for controlling the supporting force for compensating only the weight of the pulling device in each position of the pulling device.
Dependencies are inferred from the claim text.