Patent ID: 7484613
Filing Date: 2009-02-03
Classification: F16H,Y10T

Abstract:
1. A parking brake apparatus for an automatic transmission vehicle, the apparatus comprising: a parking shaft connected to a shift lever; a cam plate secured to the parking shaft; a parking rod assembly operated when the cam plate secured to the parking shaft rotates through manipulation of the shift lever; a parking gear meshed with a sprag which is actuated by the parking rod assembly, the sprag movable into and out of engagement with the parking gear; and a driving section having a driving motor assembly that drives the parking shaft such that the sprag can be engaged with or disengaged from the parking gear when the shift lever is manipulated between a parking mode and a reverse mode, wherein the driving motor generates a rotational force that is added to a disengaging force created by the parking rod assembly for disengaging the sprag from the parking gear when the disengaging force is insufficient to disengage the sprag from the parking gear.