Combination adjuster and reset mechanism

Claim 1

IN A BRAKE, THE COMBINATION OF: A FLUID MOTOR CARRIER, A CYLINDER BORE FORMED IN SAID CARRIER WHEREIN A FLUID PRESSURE IS DEVELOPED TO CAUSE ACTUATION OF SAID BRAKE, A PISTON RESPONSIVE TO SAID FLUID PRESSURE SLIDABLY RECEIVED IN SAID CYLINDER BORE, SAID PISTON BEING CENTRALLY APERTURED TO RECEIVE A POSITIONING DEVICE, SAID POSITIONING DEVICE INCLUDING A STEM THREADEDLY SECURED AT ONE END TO SAID CARRIER AND HAVING A FIXED ABUTMENT AT THE OTHER END THEREOF, A SLEEVE MEMBER RECEIVED IN THE PISTON APERTURE, A FRICTION RING ENCIRCLING SAID SLEEVE, A THREADED MEMBER SCREWED ONTO SAID PISTON TO BEAR AGAINST SAID FRICTION RING TO DEVELOP FRICTION WHICH IMPEDES RELATIVE MOVEMENT BETWEEN SAID PISTON AND SLEEVE, A TUBULAR MEMBER LOCATED WITHIN SAID SLEEVE AND OPERATIVELY SECURED AT ONE END THEREOF TO SAID SLEEVE AND ENGAGEABLE AT THE OTHER END THEREOF WITH THE FIXED ABUTMENT ON SAID STEM TO PREVENT FURTHER MOVEMENT OF SAID SLEEVE, AND A SPRING MEMBER WHICH IS COMPRESSED BETWEEN THE FIXED ABUTMENT ON SAID STEM AND A TRANSVERSE PORTION OF SAID SLEEVE, SAID TUBULAR MEMBER BEING CONSTRUCTED WITH A LENGTH PERMITTING MOVEMENT OF SAID SLEEVE TOGETHER WITH SAID PISTON, SAID SLEEVE MOVEMENT SERVING TO COMPRESS SAID SPRING WHICH THEN EXERTS A RETRACTIVE FORCE ON SAID PISTON WHEN SAID FLUID PRESSURE IS RELIEVED.