Railways: surface track – Rail joints – Insulated
Reexamination Certificate
2010-02-25
2011-12-06
Le, Mark (Department: 3617)
Railways: surface track
Rail joints
Insulated
C238S153000
Reexamination Certificate
active
08070073
ABSTRACT:
An end post for a rail joint assembly comprising: a top portion having a profile substantially identical to cross-sectional shapes of rail head sections of first and second rails of the rail joint assembly; a base; and a stem disposed between the top portion and the base; wherein one or more of the top portion, base and stem comprise a plurality of pieces of a first electrically insulating material disposed on or in a second electrically insulating material. The plurality of pieces are preferably spaced apart and may have a substantially disc-shape or a substantially cylindrical-shape, and are preferably made from a ceramic material such as zirconium dioxide, aluminum oxide or silicon nitride, where the second electrically insulating material comprises a polymeric material, such as polyurethane.
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Database WPI, Week 200825, Thomson Scientific, London, GB, AN 2008-D35428, XP002579587, Dec. 25, 2007.
Ciloglu Korhan
Shue Sidney
L.B. Foster Company
Le Mark
Thorp Reed & Armstrong LLP
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