Messier Hispano

Marcel Schott

Jean Masclet

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.

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Fontenay le Fleury, France

Marcel Schott