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US 6,267,135 B1Granted
ABS modulator with damping foam on exhaust diaphragm
AssigneeHoneywell Commerical Vehicle Systems Co.
InventorThanh Ho
Life of this patent
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Abstract
A noise reducer for a valve having a quick release function is disclosed. The noise reducer is preferably an open-celled structure that is impervious to dirt, moisture, alcohol, and oil, and acts as both a dampener and a biasing spring to reduce the oscillations of an exhaust diaphragm in an ABS modulator and urge the diaphragm toward a closed position. The open-celled foam is preferably an annular configuration so that it does not interfere with the amplitude of displacement of the diaphragm.
Claims7
An ABS modulator valve assembly for a pneumatic brake system comprising:
- a valve body having a supply port in communication with an associated brake chamber;
- an exhaust port in communication with atmosphere;
- a diaphragm interposed between the delivery port and the exhaust port for normally precluding communication therebetween;
- and
- a dampening material operatively engaging a face of the diaphragm and urging the diaphragm toward its normally closed position, the dampening material reducing the oscillation frequency of the diaphragm.
2 more elements
Dependencies are inferred from the claim text.