US 5,018,666 A · Unitary one quarter mile long railroad rail free of weld seams

Abstract

A unitary one-quarter mile long railroad rail which is free of weld seams. The rail is produced via a process including continuous rolling and asymmetric cooling.

Claims4

Dependent claims

A unitary, horizontally asymmetrical, steel railroad rail comprised of head, base and web sections, said rail being at least about 500 feet in length and substantially free of any weld seams.

Dependencies are inferred from the claim text.

Facts

Application

07/444,789Filed 1 Dec 1989

Granted

28 May 1991

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

B21B 1/085
For rolling structural sections, i.e. work of special cross-section, e.g. angle steel: rail sections
B21B 1/466
For rolling metal immediately subsequent to continuous casting: in a non-continuous process, i.e. the cast being cut before rolling
E01B 5/02
Rails; Guard rails ; Distance-keeping means for them: rails
B21B 15/0085
Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in…

Abstract

A unitary one-quarter mile long railroad rail which is free of weld seams. The rail is produced via a process including continuous rolling and asymmetric cooling.

Unitary one quarter mile long railroad rail free of weld seams

Life of this patent

Abstract

Claims4

Unitary one quarter mile long railroad rail free of weld seams

Life of this patent

Abstract

Claims4