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US 3,933,253 AGranted
Mechanical turning device for structural shapes
OwnerKeith Gardnerinventor
Life of this patent
Estimating the term…
Abstract
A mechanical turning device for structural shapes has a hollow power driven shaft supported on the end of a frame. Turning jaws are located on the end of an extension shaft which fits inside the hollow shaft and rotates with it and is moved in and out by an air cylinder. The device is wheeled into position at the end of a beam, the air cylinder actuated to move the jaws out to engage the beam end, the shaft rotated to the desired position and the jaws are then retracted.
Claims4
A mechanical turning device for structural shapes comprising
- a frame member,
- a pair of spaced apart bearings mounted on one end of the frame and with one bearing on one side of the frame and the other bearing on the other side of the frame,
- a hollow drive shaft supported to rotate in the bearings,
- an extension shaft fitting inside the hollow drive shaft and adapted for rotation with the drive shaft and for longitudinal movement with respect to the drive shaft,
- turning jaws mounted on the end of the extension shaft for engaging the end of a structural shape,
- means connected to the drive shaft for rotating the drive shaft selectively in either direction of rotation to a desired angle of rotation,
- means connected to the extension shaft for selectively moving the extension shaft longitudinally with respect to the drive shaft, and
- a pair of wheels and a supporting axle mounted on the frame for movement of the device to a position for engaging the end of a structural shape.
5 more elements
Dependencies are inferred from the claim text.