Pneumatic braking systems for vehicles
AssigneeGirling Limited
InventorsBrian Ingram, Henry Jamieson Riddoch
Life of this patent
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Abstract
In an anti-skid pneumatic braking system for vehicles a brake is applied by air from a first reservoir and the braking effort modulated by air from a second reservoir. The brake is connected to the second reservoir through two normally closed diaphragm valves in series, the first valve opened by air supplied to the brake from the first reservoir when the brake is applied and the second valve opened by air supplied from the second reservoir in skid conditions. Additionally a third normally closed diaphragm valve can be connected across the diaphragm of the brake actuator and is opened in skid conditions.
Claims14
A pneumatic braking system for vehicles comprising a diaphragm brake actuator, a first reservoir for pressurized air connected through a brake applying valve to one side of the brake actuator for applying the brake, a second reservoir for pressurized air, a normally closed first valve having its inlet connected to said second reservoir, a normally closed second valve having its inlet connected to the outlet of said first valve and its outlet connected to the second side of said actuator, means for opening the first valve in response to opening of the brake applying valve, skid sensing means, and means for opening the second valve in response to a signal from the skid sensing means, whereby pressurized air is supplied to the second side of the brake actuator from the second reservoir when the brake has been applied and a skid signal received.
A pneumatic braking system for vehicles comprising a diaphragm brake acutator, a first reservoir for pressurized air connected through a brake applying valve to one side of the brake actuator for applying the brake, a second reservoir for pressurized air, a normally closed first valve having its inlet connected to said second reservoir, a normally closed second valve having its inlet connected to the outlet of said first valve and its outlet connected to the second side of said actuator, means for opening the first valve in response to opening of the brake applying valve, skid sensing means, and means for opening the second valve in response to a signal from the skid sensing means, whereby pressurized air is supplied to the second side of the brake actuator from the second reservoir when the brake has been applied and a skid signal received, and a normally closed third valve which is opened in response to a skid signal to connect the first and second sides of the diaphragm of the brake actuator and to cut off the supply of air from the first reservoir to the first side of the diaphragm.
Dependencies are inferred from the claim text.