Patent ID: 6389984
Filing Date: 2002-05-21
Classification: B61J

Abstract:
A dog carriage system for a railway car indexing system for positioning a railway car or a trip of coupled railway cars, the cars having railway wheels mounted in and carrying bogey wheel truck frames, the dog carriage system operating by pushing against successive bogey wheel truck frames using frame-engaging dogs, said dog carriage system comprising:(a) a dog carriage frame moveable along a railroad track; (b) a pair of spaced opposed dogs including a first dog and a second dog pivotally attached to said dog carriage frame for pivoting in opposed directions between a fully lowered, dropped position and a raised position, wherein each dog in the raised position is positioned to engage a proximate bogey wheel truck frame by movement of said dog carriage frame; (c) a bogey wheel truck frame sensing device for sensing a proximate bogey wheel truck frame carried on said dog carriage frame; and (d) a dog operating system including separate chain and sprocket arrangements and chain tension controlling devices for controlling the position of each of said first dog and said second dog individually between said fully lowered, dropped position and said raised position.