Tamper-resistant brake actuator

Details Tamper-resistant brake actuator Tamper-resistant brake actuator

1998-02-10

1999-12-21

Lopez, F. Daniel

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

92 64, F16J 300

Patent

active

060034335

ABSTRACT:
A fluid-operated combination diaphragm spring brake has a tamper-resistant connection between a head and a flange case which together form a spring chamber housing a power spring. The head has an annular flange and an axial rim, and the flange case has an annular flange and an axial rim, The flanges of the head and the flange case and at least one of the rims of the head and the flange case define an annular recess. A diaphragm is sandwiched between the flanges and substantially fills the annular recess, removing substantially all the air within the annular recess. A welded connection radially adjacent the diaphragm secures head rim to the flange case rim.

REFERENCES:
patent: 3824903 (1974-07-01), Hahn
patent: 3994206 (1976-11-01), Dahlkvist et al.
patent: 5062455 (1991-11-01), Schurter et al.
patent: 5193432 (1993-03-01), Smith
patent: 5285716 (1994-02-01), Thompson
Marks' Standard Handbook for Mechanical Engineers, 9th Ed, New York, McGraw-Hill, 1987, p. 13-33.

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