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US 4,071,284 AGranted
Method and apparatus for effecting double-acting braking
AssigneeMessier Hispano
InventorsJean Masclet, Marcel Schott
Life of this patent
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AssigneeMessier Hispano
InventorsJean Masclet, Marcel Schott
Estimating the term…
A method and apparatus for effecting double-acting braking for a wheel or a set of wheels permitting compensation of failures of at least one of the braking circuits of a double-acting braking arrangement of the type comprising at least two sets of braking members and two braking circuits for each brake. A single control action achieved by a single actuating member acts simultaneously on the two braking circuits of each of the brakes and in the case of a failure of one of the two braking circuits resulting in a drop in pressure in the failed braking circuit and consequently in a reduction of the braking torque applied by the brake, the remaining circuit has its pressure increased whereby the braking torque is automatically increased by a predetermined value. For this purpose the control action is applied simultaneously to two relays having at least two operating pressure levels, each relay acting on one of the two sets of braking members via the two braking circuits. Detectors are provided in the respective circuits for detecting failures that may occur in the circuits, the detector associated with one of the circuits controlling the power level of the relay connected to the other circuit and vice versa, whereby the pressure level of the relay associated with the braking circuit that remains in operation is increased when a failure is detected in the other circuit.
A method for effecting double-acting braking for a wheel permitting compensation of failures of at least one of the braking circuits of a double-acting braking arrangement of the type comprising at least two sets of braking members and two braking circuits for each brake, the method comprising using a single control action and acting simultaneously on the two braking circuits of each of the brakes and, in the case of a failure of one of the two braking circuits resulting in a drop in pressure in the failed braking circuit and consequently in a reduction of the braking torque applied by the brake, acting on the remaining circuit to increase the pressure in the remaining circuit and the braking torque automatically by a predetermined value, by applying the control action simultaneously to two relays having at least two operating pressure levels, each acting on one of the two sets of braking members by the two braking circuits, detecting failures that may occur in said braking circuit, increasing the pressure level of the relay associated with the braking circuit that remains in operation when a failure is detected in the other circuit, and disconnecting the failed circuit.
A double-acting braking system for a wheel comprising at least two sets of braking members and two braking circuits for each brake permitting compensation of failures in at least one of the braking circuits, a single actuating member acting simultaneously on the two braking circuits of each of the brakes and means which in the event of failure of one of the two circuits enables the remaining circuit to be acted upon for increasing the braking torque by a predetermined value, said means comprising a power relay having at least two control levels and each connected to a respective one of the sets of braking members by one of the braking circuits, each braking circuit being an independent power circuit and comprising a detector, the detectors of the two circuits being so arranged that the detector associated with one of the circuits controls the power level of the relay connected to the other circuit, and vice versa.
Dependencies are inferred from the claim text.