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In 1994, Degussa sold Leybold to the Swiss Oerlikon Bührle Group, which combined Leybold with the Balzers AG, which was already in their possession, to form the Balzers and Leybold Group. The merger of these companies resulted in the world's largest vacuum and surface technology company with around 6 500 employees, generating sales of DEM 1.8 ...
A critical element in vane pump design is how the vanes are pushed into contact with the pump housing, and how the vane tips are machined at this very point. Several type of "lip" designs are used, and the main objective is to provide a tight seal between the inside of the housing and the vane, and at the same time to minimize wear and metal-to ...
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An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...
[14] [15] [1] [16] Manufacturing is predominantly handled by subsidiary businesses in the Czech Republic, South Korea, USA and China. Edwards' global research and development facilities remain in the UK. [4] Major customers in 2012 included Samsung, Hynix, Agilent and LG. [4] Edwards two stage rotary vane vacuum pump
In 1987, Leybold-Heraeus GmbH, the parent company of Inficon, was purchased by Degussa AG, and the name was changed to Leybold AG. At this point, Inficon Leybold-Heraeus became Leybold Inficon, Inc. In 1993, Oerlikon-Bührle Holding AG (OBH), which owned Balzers AG, reached a deal to buy Leybold AG from Degussa AG. Formed in 1994, Balzers and ...
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The function of a liquid-ring pump is similar to a rotary vane pump, with the difference being that the vanes are a rigid part of the rotor and churn a rotating ring of liquid to form the compression-chamber seal. They are an inherently low-friction design, with the rotor being the only moving part. Sliding friction is limited to the shaft ...