| 摘要 |
<p>Air-actuated brake servo comprising a pneumatic piston (5) sliding in a casing and housed in a tubular protective bellows (15) with a first end (15a) being connected to the casing (3). The piston carries a valve (7) and a purifying filter (14) placed between the valve and a pressure source (A). According to the invention, the bellows (15) is at least partially made of a porous and deformable material so that it forms the purifying filter.</p> |
