Automatic brake adjuster

Claim 1

A SELF ADJUSTING DRUM TYPE BRAKE FOR COACTION WITH A ROTATABLE BRAKE DRUM, SAID BRAKE COMPRISING A FIXED TORQUE RESISTING MEANS, A BRAKE SHOE CARRYING A LINING AND SUPPORTED WITHIN THE DRUM FOR MOVEMENT OF SAID LINING FROM A RETRACTED POSITION INTO ENGAGEMENT WITH THE DRUM, AN AUTOMATIC ADJUSTING DEVICE CARRIED BY SAID BRAKE SHOE AND INTERPOSED BETWEEN SAID BRAKE SHOE AND SAID TORQUE RESISTING MEANS FOR PRECLUDING ROTATION OF SAID BRAKE SHOE IN AT LEAST ONE DIRECTION AND FOR AUTOMATICALLY COMPENSATING FOR WEARING OF SAID LINING, SAID AUTOMATIC ADJUSTING DEVICE COMPRISING A FIRST MEMBER ABUTTINGLY ENGAGED WITH SAID BRAKE SHOE, A SECONE MEMBER ADAPTED TO ABUTTINGLY ENGAGE SAID FIXED TORQUE RESISTING MEANS, SAID FIRST AND SAID SECOND MEMBERS BEING EXTENSIBLE FOR COMPENSATING FOR WEAR OF SAID LINING, AUTOMATIC ADJUSTING MEANS CARRIED BY ONE OF SAID MEMBERS FOR MOVEMENT BETWEEN FIRST AND SECOND POSITIONS, SAID AUTOMATIC ADJUSTING MEANS HAVING A FIRST PORTION ADAPTED TO ENGAGE SAID TORQUE RESISTING MEANS AND A SECOND PORTION FOR INCREMENTALLY EXTENDING SAID FIRST AND SAID SECOND MEMBERS RELATIVE TO EACH OTHER UPON MOVEMENT OF SAID AUTOMATIC ADJUSTINE MEANS FROM ITS FIRST POSITION TO ITS SECOND POSITION, AND BIASING MEANS ENGAGING SAID AUTOMATIV ADJUSTING MEANS FOR URGING SAID FIRST PORTION INTO ENGAGEMENT WITH SAID TORQUE RESISTING MEANS FOR MOVING SAID AUTOMATIC ADJUSTING MEANS FROM ITS SECOND POSITION TO ITS FIRST POSITION UPON MOVEMENT OF SAID SECOND MEMBER RELATIVE TO SAID TORQUE RESISTING MEANS A DISTANCE GREATER THAN A PREDETERMINED DISTANCE AND UPON PREDETERMINED WEAR OF SAID LINING, AND RETRACTION SPRING MEANS ENGAGING SAID BRAKE SHOE FOR RETURNING SAID BRAKE SHOE TO A DISENGAGED POSITION FOR URGING SAID SECOND MEMBER INTO ENGAGEMENT WITH SAID FIXED TORQUE RESISTING MEANS, AND FOR MOVING SAID AUTOMATIC ADJUSTING MEANS FROM ITS FIRST POSITION TO ITS SECOND POSITION AFTER SAID BIASING MEANS HAS MOVED SAID AUTOMATIC ADJUSTING MEANS FROM ITS SECOND POSITION TO ITS FIRST POSITION WHEREBY ADJUSTMENT OF SAID AUTOMATIC ADJUSTING DEVICE IS EFFECTED UPON RETRACTION OF SAID BRAKE SHOE.