Patent ID: 9464681
Filing Date: 2016-10-11
CPC Classification: F16D

Claim Text:
1. A parking brake apparatus comprising: a housing; a motor-driven gear installed in the housing; a nut screw connected to the motor-driven gear and configured to rotate about an axis in accordance with rotation of the motor-driven gear; a bolt screw coupled with the nut screw and configured to move along the axis in connection with rotation of the nut screw; a cable connected to the bolt screw; a piston installed in the housing and configured to slide relative to the housing; and an elastic member arranged between an inner wall of the housing and the piston, the elastic member configured to elastically deform as the piston slides relative to the housing, wherein the housing comprises a nut screw space in which the nut screw can move in a direction opposite to the bolt screw's movement along the axis.