Method of filling spike holes in railway ties

Details Method of filling spike holes in railway ties Method of filling spike holes in railway ties

1978-10-13

1981-10-20

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Repairing

29432, 29458, 29526R, 156 92, 238370, 264 36, B23P 700

Patent

active

042952590

ABSTRACT:
A method of re-using wooden railroad ties in which the old spike holes are filled with a high density rigid polyurethane foam injected into the holes. The foam serves as a plug which prevents or retards deterioration of the tie at the hole site primarily by preventing or mitigating ingress of moisture. Additionally, the foam serves to anchor a new spike if by chance the same hole location is used when re-spiking the tie. The foam has good retention properties even if the spike is driven in before the foam has fully set.

REFERENCES:
patent: 3082578 (1963-03-01), Lindstaedt
patent: 3380213 (1968-04-01), Hartman et al.
patent: 3492381 (1970-01-01), Rhyne
patent: 3558049 (1971-01-01), Pennino
patent: 3716608 (1973-02-01), Neumann
patent: 4070201 (1978-01-01), Tessenske
patent: 4134546 (1979-01-01), Dankert

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