Patent ID: 6976563
Filing Date: 2005-12-20
Classification: F16D

Abstract:
1. A brake caliper comprising: a housing having a first bore with tapered walls; a primary piston having a piston rod, the piston and piston rod being mounted within the first bore and defining with the housing a first pressure chamber; a wedge element positioned between the piston rod and the tapered walls and being displaceable to a caliper locking position, wherein the wedge element engages the tapered walls and the piston rod to prevent relative movement between the piston and the tapered walls, and a caliper release position, wherein the wedge element permits relative movement between the piston and the tapered walls; a resilient element positioned to exert a force against the wedge element to displace the wedge element to the caliper release position; and an electromagnetic coil positioned to overcome the force of the resilient element and displace the wedge element to the caliper locking position when selectively energized, thereby preventing movement of the piston relative to the housing, and when not energized, to allow the resilient element to urge the wedge element to the caliper release position.