Expansible chamber devices – Plural flexible wall working members
Patent
1995-03-30
1996-10-01
Nguyen, Hoang
Expansible chamber devices
Plural flexible wall working members
92128, 92130R, 403348, 029521, 02988806, F01B 1900, B21D 3900
Patent
active
055602800
ABSTRACT:
A pneumatic spring brake is improved so as to be not only tamper proof but repairable as well. Such a brake is formed of a spring chamber head and adapter head, both of which define rigid mating rims that are disposed in mutual, longitudinal alignment and in face-to-face relationship. The rims compress the periphery of a spring brake diaphragm therebetween. The rim of one of the heads is fabricated with a plurality of lugs thereon separated from each other by circumferentially spaced gaps therebetween. The rim of the other of the spring brake heads is provided with a corresponding number of radially outwardly projecting flanges having widths smaller than the gaps between the lugs. The flanges project radially outwardly from the head on which they are formed and into channels formed in the lugs on the other head. The flanges are thereby held in registration with the lugs by the compression of the periphery of the spring brake diaphragm between the mating rims of the heads. The spring brake heads can thereby be disassembled only with the aid of a heavy duty press capable of developing at least about six thousand pounds per square inch. However, with such equipment the spring brake housing components can be separated to allow repair and replacement of internal parts.
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Nguyen Hoang
Overland Brakes, Inc.
Thomas Charles H.
LandOfFree
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