Expansible chamber devices – Relatively movable working members – First working member moves second coaxial working member...
Patent
1987-11-06
1990-10-02
Look, Edward K.
Expansible chamber devices
Relatively movable working members
First working member moves second coaxial working member...
92 48, 92 98R, F01B 700
Patent
active
049600362
ABSTRACT:
The present invention provides a tamper-resistant fluid-operated brake actuator having a power spring housed within a head or cap which is attached to a flange case having one or more diaphragms or pistons responsive to changes of fluid pressure within the brake actuator chambers. In one embodiment, the head is attached to the flange case by a substantially continuous curvilinear annular metal retaining member which must be inelastically deformed or destroyed in order to remove the head from the flange case, thus rendering tampering more difficult. In another embodiment, the annular metal retaining member of the present invention is integral with the actuator head and which is metal-spun or the like onto the flange case.
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Brooks David W.
Choinski Graydon J.
Gummer Allen L.
Gossett Dykema
Indian Head Industries Inc.
Look Edward K.
Ryznic John E.
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