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1. 发明授权

US3811803A Diaphragm pump 失效
标题翻译： DIAPHRAGM泵
公开(公告)号：US3811803A
公开(公告)日：1974-05-21
申请号：US21576772
申请日：1972-01-06
申请人： PIERBURG A AUTO UND LUFTFAHRTG
发明人： FROHBERG G
IPC分类号： F02M1/00 , F04B43/02 , F04B53/00 , F04B53/10 , F04B21/04
CPC分类号： F04B53/1065 , F02M1/00 , F02M2700/439 , F04B43/02 , F04B53/00 , F04B53/102
摘要： A diaphragm pump, particularly for use as a fuel pump in an internal combustion engine, comprises upper and lower housing parts separated by a diaphragm which is clamped between them. The upper housing part comprises an intermediate housing and a top cover fixed on top of it. The intermediate housing has a cross wall which extends across the interior of the upper housing part and which, together with a valve plate within the intermediate housing, divides the upper housing part into three separate chambers, a suction chamber to which the pump inlet is connected, a working chamber, and a pressure chamber to which the pump outlet is connected. The working chamber is situated between the valve plate and the diaphragm. A sunken port is press formed or drawn integrally from the cross wall in an eccentric position, the lower lip of this sunken port being sealed to the valve plate around a corresponding aperture in the valve plate. In this way a passageway is formed communicating the chamber above the cross wall, preferably the suction chamber, with the working cyamber. The seal at the lower lip of the sunken port is formed either by a sealing ring or by the lip being directly fixed to the valve plate.

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