Brake actuator

Claim 1

A BRAKE ACTUATOR OF THE CHARACTER REFERRED TO INCLUDING, AN ELONGATE SUBSTANTIALLY TUBULAR FRAME, AN APERTURED PARTITION INTERMEDIATE THE ENDS OF THE FRAME, SAID FRAME BEING FIXED TO THE TONGUE ON A TRAILER TO EXTEND PARALLEL THEREWITH, A HYDRAULIC MASTER BRAKE CYLINDER UNIT CARRIED BY THE FRAME AT THE REAR END THEREOF AND HAVING A FORWARDLY PROJECTING THREADED PISTON ROD, A FLANGED SLEEVE ENGAGED ON THE PISTON ROD, A BLOCK-LIKE BODY SLIDABLY ENGAGED IN THE FORWARD PORTION OF THE FRAME AND HAVING A REARWARDLY PROJECTING TUBULAR DRIVE STEM PROJECTING THROUGH THE PARTITION TO TELESCOPICALLY ENGAGE THE PISTON ROD AND ENGAGE THE SLEEVE, A COMPRESSION SPRING BETWEEN THE BODY AND THE PARTITION NORMALLY YIELDINGLY URGING THE BODY FORWARDLY IN THE FRAME AND THE STEM AWAY FROM THE SLEEVE, UNIVERSAL COUPLING MEANS SECURING THE BODY TO A TRAILER HITCH ON A DRAFT VEHICLE AND MANUAL OPERATING MEANS INCLUDING A FLANGED COLLAR SLIDABLY ENGAGED ON THE SLEEVE, A COMPRESSION SPRING BETWEEN THE PARTITION AND THE FLANGE ON THE COLLAR AND NORMALLY YIELDINGLY URGING THE COLLAR REARWARDLY INTO DRIVING ENGAGEMENT WITH THE FLANGE ON THE SLEEVE, TO ACTUATE THE CYLINDER UNIT, A LEVER ARM PIVOTALLY CARRIED BY THE FRAME TO ENGAGE THE FLANGE AND THE COLLAR AND MANUALLY OPERABLE TO SHIFT THE COLLAR FORWARDLY AGAINST THE RESISTANCE OF THE SECOND MENTIONED SPRING AND LATCH MEANS CARRIED BY THE FRAME AND ENGAGEABLE WITH THE LEVER ARM TO HOLD SAID LEVER ARM IN A LOCKED POSITION.