Brakes – Wheel – Axially movable brake element or housing therefor
Reexamination Certificate
1999-11-01
2001-10-09
Oberleitner, Robert J. (Department: 3613)
Brakes
Wheel
Axially movable brake element or housing therefor
C188S073360, C188S073350
Reexamination Certificate
active
06298956
ABSTRACT:
The present invention relates to a brake lining for a spot-type disc brake which is provided with additional components to reduce and eliminate noises caused during braking.
In brake technology of spot-type disc brakes for automotive vehicles, brake linings are known which, beside the classical parts such as lining support member and friction lining, comprise additional components to prevent, reduce and eliminate noises which develop during braking in the caliper due to occurring vibrations, tensions and friction. A thin damping plate which is made of plastics or a metal coated with caoutchouc is applied to the back side of the lining support member. A first objective of the plastic plate is to absorb the vibrations provoked on the brake lining during braking and, thus, to prevent their propagation to the brake caliper and any resultant noises. A second objective is to attenuate noises which are produced by friction due to a relative movement between the brake lining and its abutment surfaces. The extensions of the brake lining shown in the art satisfy only in part the desired requirements of complete noise elimination.
Therefore, an object of the present invention includes designing a brake lining so that full noise elimination is ensured.
According to the present invention, this object is achieved by the characterizing part of claim
1
. Fitted to the back side of the lining support plate is a thin damping plate made of plastic material with bores which serve as grease-receiving pockets. The grease out of the pockets spreads over the damping plate and is covered with a sliding metal sheet. Noises which are produced by vibrations of the lining support plate are uncoupled by the grease from the structure of the brake caliper and thereby dampened directly and eliminated, and not transmitted via the lining abutment surfaces to the structure of the brake caliper on which they produce noises. Noises which are caused by friction and produced due to the relative movement between the damping plate and the lining abutment surfaces of the brake caliper are dampened by way of the sliding metal sheet and the grease between the sliding metal sheet and the damping plate. The rotational relative movements which occur in the moment of braking are shifted from the abutment surfaces of the brake caliper and the lining support member into the plane between the damping plate and the sliding metal sheet. The outside of the sliding metal sheet adheres to the end surface of the brake piston due to the frictional force, and the damping plate slides on the back side of the sliding metal sheet. The friction is greatly reduced or eliminated in full due to the grease which is spread out of the grease pockets inbetween the sliding metal sheet and the damping plate so that vibrations or noises are not produced by friction between the sliding metal sheet and the damping plate.
An embodiment of the present invention will be explained in detail hereinbelow, making reference to the accompanying drawing.
REFERENCES:
patent: 4155430 (1979-05-01), Kawamura
patent: 4995482 (1991-02-01), Kobayashi et al.
patent: 20 58 045 (1971-07-01), None
patent: 34 02 866 (1984-09-01), None
patent: 41 42 196 (1993-04-01), None
patent: 01 38 081 (1985-04-01), None
patent: 6-129451 (1994-10-01), None
Bernhard Klaus
Gerhardt Winfried
Leidecker Hans-Dieter
Reuter Manfred
Burch Melody M
Continental Teves AG & Co. oHG
Oberleitner Robert J.
Rader & Fishman & Grauer, PLLC
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