Patent ID: 6390266
Filing Date: 2002-05-21
Classification: F16D

Abstract:
A multispeed transmission having a synchronizer comprising:first and second cones in spaced relationship from one another and rotatable about a common axis; a shift collar interposed between said first and second cones and rotatable about and slidable along said axis to and from a neutral position, said shift collar having first and second sets of apertures therethrough with engaging surfaces; a first set of pins extending from said first cone through said first set of apertures, said first set of pins having first large diameter surfaces adjacent said first cone and first small diameter surfaces opposite said first large diameter surfaces with first blocking surfaces disposed therebetween; a second set of pins extending from said second cone through said second set of apertures, said second set of pins having second large diameter surfaces adjacent said second cone and second small diameter surfaces opposite said second large diameter surfaces with second blocking surfaces disposed therebetween; and neutral surfaces on said first and second sets of pins engageable with said engaging surfaces when said shift collar is in said neutral position, said pins being designed such that said engaging surfaces do not engage with said first and second small diameter surfaces when said engaging surfaces engage said neutral surfaces.