Invention Grant
- Patent Title: Vacuum pump assembly with built-in shutoff valve
- Patent Title (中): 带内置截止阀的真空泵总成
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Application No.: US883792Application Date: 1978-03-06
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Publication No.: US4193742APublication Date: 1980-03-18
- Inventor: Klaus Fischer , Helmut Flauger , Kurt Balzer , Roland Fischer
- Applicant: Klaus Fischer , Helmut Flauger , Kurt Balzer , Roland Fischer
- Applicant Address: DEX Asslar
- Assignee: Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
- Current Assignee: Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
- Current Assignee Address: DEX Asslar
- Priority: DEX2451685 19741031
- Main IPC: F04B49/06
- IPC: F04B49/06 ; F04C28/24
Abstract:
A vacuum pump assembly is provided which includes a built-in pneumatic valve for closing the suction port of a vacuum pump of the assembly with an auxiliary valve being provided for controlling operation of the pneumatic valve. An electromagnetic valve is utilized as the auxiliary valve and a generator coupled with the shaft of the vacuum pump generates electric current in accordance with the operating stages of the pump in order to control the auxiliary valve.
Public/Granted literature
- US5337496A Sludge treatment process Public/Granted day:1994-08-16
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