| 摘要 |
<p>1498477 Brake boosters BENDIX CORP 25 Nov 1975 [25 Nov 1974] 48424/75 Heading F2F A brake booster comprises front and rear shells 12, 18 defining a casing 22 divided into two chambers 24, 26 by a movable wall 28 and diaphragm 30, one chamber 24 being connected in use to a reference pressure such as a vacuum source and the other being selectively connected to vacuum or atmosphere by means of a valve 42, the diaphragm 30 having a peripheral bead 34 and means for closing the shells including an annular seat 56 located in a wall section of shell 12 aligning slots 70 and tabs 72 or 74 between the slots co-operating with a ledge 64 on shell 18 provided with lugs 68 co-operating with the slots so that during assembly the bead 34 will engage the ledge 64 and engagement of the lugs and tabs will cause the head to resiliently flow toward the seat 56 and create a fluid-tight relationship between the parts, the tabs being bent into contact with a shoulder 66 on shell 18 to secure the parts together.</p> |
