Method of drilling and injecting perservative fluid into railway

Details Method of drilling and injecting perservative fluid into railway Method of drilling and injecting perservative fluid into railway

1976-03-18

1977-09-13

Simpson, Othell M.

Coating processes

With cutting, holding, severing, or abrading the base

Prior to coating

21 7, 21 73, 118 35, 144327, 408 1R, 408 59, B23B 3500, B27K 302

Patent

active

040483533

ABSTRACT:
Holes in railway ties are drilled and impregnated with creosote or other preservative using a hollow drill with consecutive drilling and creosote injection cycles, either at the time of rail mounting or in a prior processing stage so as to produce a tie with improved resistance to deterioration, for example due to ingress of water in the tie hole. The invention enables the preservation of pretreated ties, which are subsequently drilled to receive spikes for rail tie plates, by continuing the skin of creosote or other preservative from the outer surface of the tie to the walls of the drilled hole. A sealing collar assembly is mounted on the drill to prevent egress of preservative from the hole during the injection process.

REFERENCES:
patent: 2708852 (1955-05-01), Wohlfahrt
patent: 3450073 (1969-06-01), Baker
patent: 3767315 (1973-10-01), Burks

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