Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1978-04-03
1979-12-25
Kazenske, Edward R.
Brakes
Wheel
Axially movable brake element or housing therefor
188196P, F16D 6554
Patent
active
041801474
ABSTRACT:
An actuator mechanism for a brake having a plurality of friction disc compressed between a pressure plate and a backing plate. The actuator mechanism has a piston located in a bore of a housing. A pin fixed to the housing extends through and locates the piston in the bore. A first tube made of an insulator material is located in the bore between the piston and the pressure plate. A second tube concentric to the first tube has an inwardly projecting flange adjacent to the piston and an outwardly projecting flange. A keeper attached to the first tube cages a spring between the outward projecting flange and the first tube. A third tube which engages the inwardly projecting flange is connected to the pin through a button fastener thereby establishing an air gap between the first tube and the pressure plate. The piston, in response to an operational input, initially moves in the bore by overcoming the spring and brings the first tube into engagement with the pressure plate to eliminate the air gap. At the same time, the piston engages the inwardly projecting flange to establish a solid linkage between the piston and the third tube. Further movement of the piston deforms the third tube and moves the third tube with respect to the pin. Upon termination of the operational input, the third tube remains stationary and the spring moves the first tube to reestablish an air gap of substantially the same initial dimension after every brake application. The air gap forms a barrier to reduce the transfer of thermal energy between the friction disc and the end of the first tube. Since the first tube is an insulator material, the transfer of thermal energy through the first tube is substantially reduced and damage to the seals in the piston which could cause a brake failure eliminated.
REFERENCES:
patent: 3095064 (1963-06-01), Tankersley et al.
patent: 3338353 (1967-08-01), Lucien
patent: 3542165 (1970-11-01), Lucien
patent: 3729072 (1973-04-01), Borkowski
patent: 3811366 (1974-05-01), Angelis et al.
patent: 3990547 (1976-11-01), Plaat
patent: 4006669 (1977-02-01), Price
Harnish Eugene E.
Keresztes Robert J.
Tjarksen Richard A.
Decker Ken C.
Kazenske Edward R.
McCormick Jr. Leo H.
The Bendix Corporation
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