Servomotor for a parking brake

摘要

#CMT# #/CMT# The booster has an enclosure (2) containing a moving wall (22) dividing an inside of the enclosure into a working chamber (21) and a vacuum chamber (20). A piston (5) moves axially and is secured to the moving wall of the enclosure, and a three-way valve (4) is controlled by a plunger (3) that allows the working chamber to be connected to the vacuum chamber or to atmospheric air. An output rod (6) and a control rod (1) are passed through center of a reaction disk (7). #CMT# : #/CMT# An independent claim is also included for a vehicle handbrake comprising a transmission cable or rod. #CMT#USE : #/CMT# Brake booster for transmitting hand brake cable commands in a vehicle hand brake system. #CMT#ADVANTAGE : #/CMT# The booster is easily utilized by any driver while retaining the features of the conventional hand brake system. The booster does not occupy a great deal of space. The booster reduces the boost effort without an increase in the force that has to be applied via the hand brake lever. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a brake booster for use in a hand brake system. 1 : Control rod 2 : Enclosure 3 : Plunger 4 : Three-way valve 5 : Piston 6 : Output rod 7 : Reaction disk 20 : Vacuum chamber 21 : Working chamber 22 : Moving wall.