Tamper-resistant brake actuator

Details Tamper-resistant brake actuator Tamper-resistant brake actuator

1994-03-22

1995-07-18

Denion, Thomas E.

Expansible chamber devices

With assembly or disassembly facilitating means

92 63, 24 20EE, 24 20CW, 29509, 403338, F01B 2900

Patent

active

054331382

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.

REFERENCES:
patent: 3295176 (1967-01-01), Bright
patent: 3909919 (1975-10-01), Miyabayashi et al.
patent: 4106799 (1978-08-01), Oetiker
patent: 4222155 (1980-09-01), Oetiker
patent: 4430775 (1984-02-01), Arthur
patent: 4451955 (1984-06-01), Kern et al.
patent: 4695080 (1987-09-01), Oetiker
patent: 4832380 (1989-05-01), Oetiker

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