Railway car coupler

A railway car coupler comprising:

• a head having a lock receiving chamber;
• a knuckle, including a knuckle pad extending from a main body of the knuckle and having a generally concave surface joining the pad to said main body, pivoted to said head and having a closed position and an open position;
• a lock in said chamber for locking said knuckle in said closed position;
• and
• a pivotable knuckle thrower having first and second outwardly extending legs, said thrower being positioned within said head, said lock being movable out of locking position to engage a first of said legs to pivot said thrower to effect opening of said knuckle, the second of said legs being in engagement with the knuckle and including surface means being configured to effectively shorten the distance from the thrower pivot to the point of engagement between said second thrower leg and said knuckle pad and lengthen the distance between said point of engagement and said knuckle pivot and limit shortening of the effective length of the moment arm generated by said second leg for rotating the knuckle during the knuckle opening movement, the surface means of said second leg remaining in spaced relation relative to said concave surface during the entire knuckle opening movement.