BOX FOR PNEUMATIC BOOSTER AND METHOD OF ITS PRODUCTION

摘要

PCT No. PCT/EP90/01616 Sec. 371 Date Aug. 28, 1992 Sec. 102(e) Date Aug. 28, 1992 PCT Filed Sep. 24, 1990 PCT Pub. No. WO91/09761 PCT Pub. Date Jul. 11, 1991.A construction and fabrication process for a two piece vacuum brake power booster housing is described which eliminates the surface tensions which are caused by forming during assembly to prevent damage to a protective surface finish. Localized radially weakened zones are each formed by two opposing tongues created by circumferential and axial slots which tongues in the assembled condition of the housing engage behind an outwardly and reversely formed rim (3) of the other housing half (1).