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US 4,461,313 AGranted
Fluid pressure valve
AssigneeGirling Midland Ross Air Actuation Limited
InventorPaul Beaumont
Life of this patent
Estimating the term…
Abstract
A quick release valve for a vehicle braking system has an inlet port, an outlet port for connection to a brake actuator, and an exhaust port closed during operation of the actuator by a working area of a diaphragm. A support area of the diaphragm surrounding the area has peripheral indents with re-entrant edge portions. Reduction of the support area by formation of the indents lessens noise produced by the valve during exhausting after operation of the brake actuator.
Claims11
In a quick release valve comprised of:
- a valve body;
- an inlet port in said body;
- an exhaust port in said body;
- at least one outlet port in said body for connection to a working pressure line;
- at least one passageway in said body communicating said inlet port to each outlet port and each outlet port to said exhaust port;
- a freely floating flexible diaphragm in said valve body having a central portion seating against a port of said exhaust port to prevent flow of fluid from said inlet port therethrough when fluid under pressure is applied through said inlet port, and an outer portion extending into the passageway in said valve body so that when said fluid pressure from said inlet port is reduced below the fluid pressure in said outlet port, the fluid pressure from the outlet port lifts said central portion off of the seating portion of said exhaust port to allow the flow of fluid from the outlet port through the exhaust port;
- the improvement comprising at least one indent in said outer portion having a shape to form a cut-out peripheral section in said outer portion so that noise produced by vibration of said diaphragm during exhausting of fluid from each outlet port through said exhaust port is minimized.
4 more elements
Dependencies are inferred from the claim text.