发明公开
- 专利标题: SERVOMOTEUR PNEUMATIQUE
- 专利标题(英): Pneumatic servomotor.
- 专利标题(中): 气动增压。
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申请号: EP93919404.0申请日: 1993-08-27
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公开(公告)号: EP0659134A1公开(公告)日: 1995-06-28
- 发明人: GAUTIER, Jean-Pierre , VERBO, Ulysse , PEREZ REVILLA, Miguel
- 申请人: ALLIEDSIGNAL EUROPE SERVICES TECHNIQUES
- 申请人地址: 126 rue de Stalingrad F-93700 Drancy FR
- 专利权人: ALLIEDSIGNAL EUROPE SERVICES TECHNIQUES
- 当前专利权人: ALLIEDSIGNAL EUROPE SERVICES TECHNIQUES
- 当前专利权人地址: 126 rue de Stalingrad F-93700 Drancy FR
- 代理机构: Bentz, Jean-Paul
- 优先权: FR19920011224 19920921
- 国际公布: WO1994006660 19940331
- 主分类号: B60T13
- IPC分类号: B60T13
摘要:
A pneumatic brake servo comprises a casing (10) enclosing a piston (20) composed of a boss (34) and skirt (32). The casing (10) defines a front chamber (16) permanently connected to a vacuum source and a rear chamber (18) selectively connected to the front chamber (16) or to the atmosphere by means of a valve member (60, 62) actuated by a control rod (54) capable of coming to rest, through the front face of a plunger (44), on the rear surface of a reaction disc (48) integral with a thrust rod (52). A return spring (84) for the control rod (54) is disposed between the piston (34) and the plunger (44), the valve member (60, 62) including a shutter co-operating with a first circular valve seat (44a) on the piston (20), the shutter (60, 62) including a flexible membrane (60) of a generally truncated cone shape, sealingly fitted by its outer peripheral edge to the piston (20). According to the invention, the flexible membrane (60) is sealingly connected by its inner peripheral edge to a rigid tubular part (62) sealingly sliding in a rear tubular part (22) of the piston (20).
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