| 摘要 |
<p>A brake actuator, preferably for a rail vehicle, has a piston (10) movable under the influence of belleville springs (16), counteracted by fluid pressure at the opposite side of the piston for releasing the brakes. In order to obtain a compact design with high and even force output each belleville spring (16), having a degressive spring characteristic curve, is made to work only in the part of said curve where the force is at its maximum and is comparatively constant during a comparatively large deflection of the spring.</p> |
