Heat shield for a brake piston and brake actuator...

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 65/18 (2006.01) F16D 65/14 (2006.01) F16D 65/22 (2006.01) F16D 65/78 (2006.01)

Patent

CA 2459093

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).

L'invention concerne un écran thermique (10) pour piston de frein (12) qui comprend un anneau (14) en matériau d'isolation thermique. Cet anneau (14) présente une paroi circulaire radiale interne (20), une paroi circulaire radiale externe (22) et, au niveau d'une extrémité axiale (24), une surface écran annulaire plane (26) qui s'étend entre la paroi interne (20) et la paroi externe (22). Un bourrelet (28) s'étend radialement vers l'intérieur depuis une surface interne de la paroi interne (20). Ce bourrelet (28) est placé dans une rainure (30) formée autour de la paroi circulaire externe (16) du piston (12) pour assurer un couplage efficace entre l'anneau (14) et le piston (12). Une fois le couplage assuré, la surface écran annulaire plane (26) se trouve dans le même plan qu'une surface de piston annulaire (52) formée à l'extrémité ouverte (18) du piston (12).

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