Lock extension for train derail

Railway switches and signals – Interlocking – Derails

Reexamination Certificate

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Details

C104S262000

Reexamination Certificate

active

07735783

ABSTRACT:
The present disclosure relates generally to an improved safety device for use in the railroad industry. Specifically, the present disclosure relates to an above ground lock extension for train derails. Train derails are used in the railroad industry for derailing and therefore effectively stopping trains or unattended rolling stocks which rolls over said derail. The lock extension device comprises a locking device allowing an individual to lock said lock extension device to a derail while standing in an upright position, thereby diminishing injuries that may occur with prior art locking devices that are at ground level.

REFERENCES:
patent: 817518 (1906-04-01), Roach
patent: 1106155 (1914-08-01), Newkirk
patent: 1130433 (1915-03-01), Richter
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patent: 1420425 (1922-06-01), Hayes
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patent: 1627092 (1927-05-01), Hayes
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patent: 2330780 (1943-09-01), Klein
patent: 3517186 (1970-06-01), Hayes
patent: 4165060 (1979-08-01), Meyer
patent: 6105906 (2000-08-01), Pease et al.
patent: 2002/0020349 (2002-02-01), Woodnorth et al.
patent: 2005/0151035 (2005-07-01), Crain et al.

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