F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
188/152, 188/159
F16D 65/14 (2006.01) F16J 1/01 (2006.01) F16D 65/20 (2006.01)
Patent
CA 1187424
IMPROVED PISTON FOR DISC BRAKES ABSTRACT An improved disc brake plastic piston is described which has a metallic cap or face which provides a means of attaching a brake shoe or a brake shoe assembly, or provides a dust boot groove, or, in a most preferred mode, the metallic cap component provides both a brake shoe retaining means and a dust boot groove. The piston is comprised of a cylindrical plastic body having an open end and a closed end. At least one ring bead can extend from the wall of the piston body contiguous to, or near, the open end. The bead or beads are suitably ejector beads utilized in the molding operation. A metallic cap extends over the end wall of the open end of the cylindrical body and is secured to the body by being snap fit or clamped over the ring bead. The cap is adapted to receive and hold a brake shoe clip, or provide a dust boot groove, and, in a most preferred embodiment, provides both a brake shoe retaining means and a dust boot groove. Alternative means for anchoring the metallic cap are provided, such as by crimping the interior lip of the metallic cap or by pro- viding threads on the internal or external walls of the piston adja- cent to the open end of the piston, and corresponding or matching threads on the metallic cap.
386688
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Occidental Chemical Corporation
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