Brake assembly with active piston retraction

A brake assembly comprising:

• a caliper having a caliper cavity;
• a brake pad coupled to the caliper;
• a brake piston mounted in the caliper cavity and configured to be movable to displace the brake pad for a brake apply or release, the brake piston having an inner wall forming a piston cavity, wherein a groove is formed on the inner wall of the brake piston;
• a spindle nut positioned within the piston cavity of the brake piston, the spindle nut configured to be linearly movable within the piston cavity in response to rotation of a spindle;
• the spindle operably coupled to the spindle nut;
• and
• a resilient material, wherein at least a part of the resilient material is located within the groove formed on the inner wall of the brake piston and an other part of the resilient material is disposed on an outer surface of the spindle nut positioned within the piston cavity of the brake piston so that the resilient material is engageable with side walls of the groove formed on the inner wall of the brake piston to move the brake piston by a restoring force of the resilient material in response to linear movement of the spindle nut,
• wherein the resilient material does not contact a circumferential surface formed between the side walls of the groove of the brake piston so that the resilient material is movable between the side walls of the groove of the brake piston without contacting the side walls of the groove of the brake piston.