Vacuum pump with ventilating means

a vacuum pump and ventilating technology, applied in the field of vacuum pumps, can solve problems such as negative consequences, and achieve the effect of more operational stability of vacuum pumps
US20120060683A1Inactive Publication Date: 2012-03-15SCHWABISCHE HUTTENWERKE AUTOMOTIVE CMBH
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
SCHWABISCHE HUTTENWERKE AUTOMOTIVE CMBH
Publication Date
2012-03-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

A vacuum pump for supplying a machine assembly with a negative pressure includes a housing and a housing cover surrounding a delivery chamber. The delivery chamber includes a low-pressure region having a working inlet connected to the assembly, and a high-pressure region having a working outlet. A delivery member moveable within the delivery chamber, which, when moved, suctions air into the delivery chamber through the working inlet and expel it at an increased pressure through the working outlet. An outlet valve is arranged at or downstream or the working outlet and at least makes it difficult for air to flow back into the delivery chamber. The delivery chamber is connected to the external environment of the vacuum pump via a ventilating connection in order to establish at least partial pressure equalization with the external environment when the delivery member is stopped and a negative pressure prevails in the delivery chamber.
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Description

RELATED APPLICATION DATA

[0001] This application claims the priority of German patent application No. 10 2010 044 898.2-15, filed on Sep. 9, 2010, which is hereby incorporated in its entirety by reference.FIELD OF THE INVENTION

[0002] The invention relates to a vacuum pump for supplying a machine assembly with a negative pressure. The assembly is assigned to a machine, preferably an engine and particularly preferably an internal combustion engine. It can be arranged directly on the machine or even within the machine or also retracted from it and can be operated together with the machine, preferably in accordance with the machine. The vacuum pump, when installed, is preferably driven by the machine, for example by a crankshaft or valve control shaft of an internal combustion engine. The invention relates in particular to a vacuum pump which is installed in a motor vehicle or is designed to be installed in a motor vehicle.BACKGROUND OF THE INVENTION

[0003] Vacuum pumps in motor vehicles, fo...

Claims

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