发明名称 Stroke indicator for an air-operated combination diaphragm spring brake
摘要 An air-operated combination diaphragm spring brake has a service chamber in tandem with a spring chamber. The service chamber being separated into an upper and lower section by a first elastomeric diaphragm. The spring chamber is separated into upper and lower sections by a second elastomeric diaphragm. A lever type stroke indicator is positioned within either or both the lower sections of the service chamber and the spring chamber. The stroke indicator in the service chamber pivots about a pin when contacted by a plate associated with the service push rod when the brakes are applied, resulting in a portion of the stroke indicator to extend beyond the periphery of the service chamber housing and provide a visual indication of the need to inspect the brake system. The stroke indicator in the lower section of the spring chamber also pivots about a pin when contacted by the pressure plate of the spring chamber resulting in a portion of the lever striking a pin which will then extend beyond the periphery of the service chamber housing, to provide a visual indication of the need to inspect the brake system. Simultaneously, another portion of the lever uncovers an opening to a passage between the lower section of the spring chamber and the atmosphere, which is sealed by a cap. The pressurized air within the lower section is great enough to blow away the cap to provide a second visual indication and the pressurized air exiting through the opening creates a high pitched whistle to provide an audible stroke indicator.
申请公布号 US5649469(A) 申请公布日期 1997.07.22
申请号 US19930057988 申请日期 1993.05.05
申请人 NAI ANCHORLOK, INC. 发明人 PIERCE, WILLIAM C.
分类号 B60T17/08;F16D66/00;(IPC1-7):F01B25/26 主分类号 B60T17/08
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