Noise attenuated brake friction member
AssigneeAlliedSignal Inc.
InventorLi J. Zeng
Life of this patent
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Abstract
A friction material for a brake pad is disclosed which is used in a brake system to attenuate noise generated during a brake application. The friction material has double chamfers on its leading and trailing edges which extend from an engaging surface. Each of the double chamfers has a first surface area located in a first plane and a second surface area located in a second plane with respect to the engaging surface. The first surface area and the second surface area intersect to define an engagement contact edge where the friction material initially engages a rotating member such that path through which frequencies generated during a brake application are changed resulting in an acceptable noise level during a brake application.
Claims10
A brake pad having a friction member attached to a metal backing plate through a bond and engagable with a rotating member to effect a brake application, said friction member and rotating member generating a plurality of frequencies of audible sounds during such brake application, said friction member being characterized by double chamfers extending from an engagement surface toward a leading edge and a trailing edge, each of said double chamfers having a first surface that engages a second surface and said engagement surface to define a point that forms an initial contact with said rotating member and attenuates audible sounds generated during a brake application, said point of initial contact as said friction pad wears but continues to attenuate the generation of audible sounds in a same manner as prior to such wear.
A brake pad having a friction member attached to a metal backing plate through a bond and having an engagement surface which contacts a rotating member to effect a brake application, said friction member and rotating member generating a plurality of frequencies of audible sounds during such brake application, said friction member being characterized by double chamfers extending from said engagement surface toward a leading edge and a trailing edge, each of said double chamfers having a first surface that engages a second surface and said engagement surface to define a contact edge which forms an initial engagement contact with said rotating member and attenuates audible sounds generated during a brake application, said contact edge of engagement changes as said friction pad wears but continues to attenuate the generation of audible sounds in a same manner as prior to such wear.
Dependencies are inferred from the claim text.