Railway truck bolster friction assembly

A railway truck bolster friction assembly adapted to be captively retained within a pocket of an elongated truck bolster member which extends between spaced elongated side frame members of a railway truck vehicle comprising:

• elastomeric friction means adapted to have a first portion thereof in communication with adjacent surfaces of such a pocket and a second portion thereof in frictional engagement with adjacent portions of wearing surface means of a column guide of a respective one of said side frames, said second portion being spaced longitudinally outwardly, with respect to the longitudinal axis of such a bolster member, from such a pocket and said first portion being spaced longitudinally inwardly from said second portion;
• said elastomeric friction means being operative to deform and maintain said frictional engagement, without slipping between adjacent engaging surfaces, during at least initial vertical and transverse movements of such a bolster member with respect to such a respective one of said side frame members;
• during a subsequent transverse movement of such a bolster member with respect to such a side frame member, at least a section of said section portion slips transversely with respect to the adjacent portion of said wearing surface means;
• and during such transverse slipping, said adjacent portion of said wearing surface means cooperates with such a pocket to continuously increase the friction between said section of said second portion and said adjacent portion of said wearing surface means in direct proportion to the amount of said subsequent transverse movement.