Heat shield for a brake piston and brake actuator incorporating same

摘要

A heat shield (10) for a brake piston (12) comprises a ring (14) made of a thermal insulating material. The ring (14) includes a radially inner circumferential wall (20), a radially outer circumferential wall (22), and at one axial end (24), a planar annular shield surface (26) that extends between the inner wall (20) and outer wall (22). A bead (28) extends radially inward from an inside surface of wall (20). The bead (28) sits within a groove (30) formed about the outer circumferential wall (16) of the piston (12) to effectively couple the ring (14) to the piston (12). When so coupled, the planar annular shield surface (26) is co-planar with an annular piston surface (52) formed at an open end (18) of the piston (12).