| 摘要 |
<p>In order to reduce the distortion of a servo booster housing in use the booster is provided with one or more ties which extend through the movable wall for transmitting reaction forces directly from the master cylinder housing to the vehicle bulkhead between which the booster is mounted. This enables a housing of lighter weight, such as a plastics housing, to be employed, and an overall saving in weight may be achieved. The front or rear housing wall, or both, is provided with a sleeve which encases part of the tie within the housing. The sleeve may perform various functions: it may be keyed to the tie to resist turning of the tie, it may be arranged to support a rolling diaphragm sealing the tie to the movable wall, and its free end may locate a peripheral bead on the rolling diaphragm.</p> |
