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US 4,123,894 AGranted
Sealed wire rope
AssigneeBethlehem Steel Corporation
InventorsCharles R. Hughes, Darral V. Humphries
Life of this patent
Estimating the term…
Abstract
A corrosion resistant rope in which the individual strands are sealed with a plastic foam impregnant and which exhibits excellent retention of lubrication is made by preimpregnating the outer strands of the rope with plastic foam material prior to closing the strands into a wire rope. The final rope may then be surface lubricated to provide temporary and long term corrosion resistance and lubrication to exposed surface wires.
Claims10
A corrosion resistant wire rope comprising:
- (a) a central core,
- (b) a series of foam plastic impregnated outer strands surrounding the central core,
- (c) each of said outer strands having a rough fibrous and porous surface as a result of an abrading operation after foaming and hardening of the plastic material, and
- (d) a grease-like lubricant over the exposed surface of the outer strands intermingled with the fibrous surface of the strand and contained in the surface pores of the plastic.
1 more element
A method of making a corrosion resistant wire rope comprising:
- (a) making a series of foamable plastic impregnated wire strands,
- (b) foaming the plastic in the strands,
- (c) closing said foam impregnated strands about a central core, and
- (d) applying a viscous lubricant over the surface of the outer strands.
1 more element
A wire rope comprising:
- (a) a lubricated central core,
- (b) a series of foam plastic impregnated outer strands surrounding the central core,
- (c) each of said outer strands having a rough fibrous, porous outer surface as a result of an abrading operation after foaming and hardening of the foam plastic material, the surface of said outer strands being interengaged with adjacent outer strands in a manner such that passage of lubricant from the central core to the exterior of the rope is substantially prevented.
Dependencies are inferred from the claim text.