Patent ID: 6840354

Claim:
A brake actuator for a rail vehicle brake comprising: a) a service brake unit having a braking force generator for the application and/or release of the brake, b) an energy storage brake unit having a first energy accumulator for accumulating and supplying energy for the application of the brake as one or more of an operational emergency brake and a parking brake, c) a force conversion device for converting the energy supplied by one or more of the braking force generator and the first energy accumulator to a brake application movement, d) a second energy accumulator for accumulating and supplying energy for the application of the brake and including at least one accumulator-type spring mechanically and operably connected in parallel to the braking force generator and to the first energy accumulator, e) the brake force generator and the accumulator-type spring being mutually coordinated such that, during a service braking, the accumulator-type spring alone generates a defined braking force between a minimal and a maximal braking force, or the accumulator-type spring and braking force generator, in an addition of force, generate a braking force higher than the defined braking force, or the accumulator-type spring and the braking force generator, in a subtraction of force, generate a braking force lower than the defined braking force, and f) the accumulator-type spring, together with the first energy accumulator, in the event of an emergency braking and/or parking braking, being activated in the brake application direction.