Spring brake assembly having tamper-resistant welded housing and

Details Spring brake assembly having tamper-resistant welded housing and Spring brake assembly having tamper-resistant welded housing and

1992-09-22

1994-02-15

Denion, Thomas E.

Expansible chamber devices

Relatively movable working members

First working member moves second coaxial working member...

92 98R, 92 96, 921691, 228184, 29454, F01B 700

Patent

active

052857166

ABSTRACT:
Disclosed is an improved spring brake assembly, and a method for making same, which is particularly resistant to unauthorized disassembly and its consequent hazards. A diaphragm is locked between two opposing portions of a housing. The two opposing portions of the housing are both made of steel and are welded rather than clamped to one another. The weld is performed in such a way that the diaphragm is not burnt or otherwise damaged by the welding process. The opposing portions are configured as a cylindrical coupling between a male member having an inwardly extending lip, and a female member preferably having an inner circumferential ledge, which cooperate to trap the periphery of the diaphragm at an end of the coupling remote from the weld.

REFERENCES:
patent: 3675308 (1972-07-01), Ziegler
patent: 4850263 (1989-07-01), Rumsey et al.
patent: 4925698 (1989-01-01), Petrie
patent: 4960036 (1990-10-01), Gummer et al.
patent: 5002164 (1991-03-01), Bowyer
patent: 5062455 (1991-11-01), Schurter et al.
patent: 5067391 (1991-11-01), Choinski et al.
patent: 5105727 (1992-04-01), Bowyer
patent: 5193432 (1993-03-01), Smith

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