US Patent 7588426 Oil rotary vacuum pump and manufacturing method thereof
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Patent Inventor Names
Giuseppe De Palma0
Roberto Carboneri0
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Patent abstract
An oil rotary vacuum pump of mechanical type (100) is filled with a requested amount of oil at the end of the manufacturing process, then it is stored and then shipped to the user, letting the user to avoid an operation of introducing the proper amount of oil into the pump. The oil leakage is prevented by securing the suction and/or exhaust ports (3, 17) of the pump, which are sealed by means of a removable sealing member, for instance by means of a membrane (21, 23).
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US Patent 07588426 Oil rotary vacuum pump and manufacturing method thereof US Patent 7588426 Oil rotary vacuum pump and manufacturing method thereof
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Patent Number
075884260
Patent Number
75884260
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Patent Jurisdiction
Patent Number
075884260
Date of Patent
September 15, 2009
0Patent Application Number
111188630
Date Filed
April 29, 2005
0Official Website
Patent Primary Examiner
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US Patent 07588426 Oil rotary vacuum pump and manufacturing method thereof
Infobox
Is a
Patent jurisdiction
Patent number
07588426
Date of patent
September 15, 2009
Patent application number
11118863
Date Filed
April 29, 2005
Patent primary examiner
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