Integral casted labyrinth ring for brake drum

Details Integral casted labyrinth ring for brake drum Integral casted labyrinth ring for brake drum

F - Mech Eng,Light,Heat,Weapons

16

D

F16D 65/10 (2006.01) B22D 19/02 (2006.01) F16D 51/00 (2006.01)

Patent

CA 2089034

ABSTRACT OF THE DISCLOSURE A composite brake drum for motor vehicle applications incorporating an embedded annular ring insert. The annular ring is positioned within a casting cavity to define the surfaces of a labrynth groove at the open rim of the brake drum. The labrynth groove defines a region for a backing plate flange to define a labrynth seal to prevent entry of debris into the brake drum. By defining the labrynth groove using an annular ring inserted within the mold, the post-casting machining requirements are significantly reduced. Moreover, the presence of a steel ring in the rim of the brake drum provides structural benefits. The annular ring further preferably incorporates locating means to assure accurate positioning within the casting mold cavity. 2872-00211 -11-

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