Rail insulators

Details Rail insulators Rail insulators

2011-07-12

2011-07-12

Le, Mark T (Department: 3617)

Railways: surface track

Fastenings

Clamps

C238S351000, C238S310000

Reexamination Certificate

active

07975934

ABSTRACT:
A rail support assembly includes a rail tie, a rail with a rail base, a pair of support shoulders embedded in the rail tie and located on either side of the rail base, rail clips seated in the support shoulders and having a toe section lying on the rail base, rail insulators having an upper portion lying between the clip toes and the rail base, abutting the rail base, and a lower portion wedged between the rail base and the support shoulders, wherein each support shoulder includes: a rail face; a clip gateway through the rail face; a rail clip ramp from the rear of the shoulder to the clip gateway; and a retention ledge formed on the rail face on each side of the clip gateway. When assembled, each retention ledge is disposed above one of the rail insulators to prevent vertical movement of the respective rail insulators.

REFERENCES:
patent: 4267970 (1981-05-01), Lubbers
patent: 4576334 (1986-03-01), Young
patent: 4928878 (1990-05-01), Young
patent: 5110046 (1992-05-01), Young et al.
patent: 5520330 (1996-05-01), Brown et al.
patent: 5551633 (1996-09-01), Kish et al.
patent: 6367704 (2002-04-01), Mediavilla
patent: 6604690 (2003-08-01), Young et al.
patent: 2002/0000475 (2002-01-01), Igwemezie
patent: WO-0231264 (2002-04-01), None

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