| 摘要 |
An improved spring brake construction is formed by a pair of concave metal housng portions having peripheral lips. Once the internal components of the spring brake are assembled within the housing portions, the lip of one housing portion is spun over the lip of the other housing portion to capture and grip it, thereby permanently sealing the housing portions together. The push rod and coil spring within the spring brake are maintained in axial alignment by a central indentation in one of the housing portions that extends coaxially within the coil spring, and by the construction of the spring diaphragm with a central axial protrusion which extends into a central opening in a spring plate on the side of the diaphragm facing the coil spring. On the opposite side of the diaphragm a push rod seat is laterally restrained from movement relative to the diaphragm.
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