Process for screwing and unscrewing the tie screws of a railroad

Details Process for screwing and unscrewing the tie screws of a railroad Process for screwing and unscrewing the tie screws of a railroad

1996-03-22

1997-04-01

Morano, S. Joseph

Railways

Track layers

104 171, E01B 902

Patent

active

056156162

ABSTRACT:
A process and vehicle for automatically screwing and unscrewing tie screws performed by the vehicle moving continuously along a track. This invention makes it possible to detect and determine the relative position of a tie screw with respect to a tie screw fastening head by optoelectronic devices and to set, if appropriate, the inclination of the tie screw fastening head. The tie screw fastening head is positioned above the tie screw and a tie screw fastening cycle is engaged for each tie screw. The tie screw fastening heads then hop from one work position to another, performing this process.

REFERENCES:
patent: 3628461 (1971-12-01), Plasser et al.
patent: 5465667 (1995-11-01), Hosking et al.

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