Patent ID: 6488267
Filing Date: 2002-12-03
Classification: A62B,A63B,B66D

Abstract:
An apparatus for lifting or pulling a load, comprising:a device having a housing and a chamber configured for receiving a pressurized medium, the device further including first and second ports in communication with the chamber for receiving and venting the pressurized medium, said device comprising a pneumatic cylinder; a member movably disposed within the chamber and having a portion extending from the chamber, the member being movable in a first direction when the pressurized medium is introduced into the first port, and in a second direction when the pressurized medium is introduced into the second port, said member comprising a piston movably disposed within the chamber, and a piston rod having a first end attached to the piston and a second end extending from the chamber; a first braking device configured to be movably mounted upon a rope, the first braking device being attached to the portion of the member extending from the chamber, the first braking device comprising a body through which the rope passes and a locking device movably attached to the body, the locking device allowing movement of the first braking device, with respect to the rope, in the first direction, and preventing movement of the first braking device, with respect to the rope, in the second direction; and a second braking device configured to be movably mounted upon a rope, the second braking device being attached to the housing, the second braking device comprising a body through which the rope passes and a locking device movably attached to the body of the second braking device, the locking device of the second braking device allowing movement of the second braking device, with respect to the rope, in the first direction, and preventing movement of the second braking device, with respect to the rope, in the second direction, the second braking device including means for attaching the second braking device to an object.