4. Rotary expansible chamber devices
  5. Interengaging rotating members
  6. Helical or herringbone

Klaus Rofall

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Cooled screw-type vacuum pump

Rotary expansible chamber devices – Heat exchange or non-working fluid lubricating or sealing – With heat exchange means for non-working fluid
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Tempering method for a screw-type vacuum pump

Rotary expansible chamber devices – With signal – indicator or transparent inspection means
Reexamination Certificate

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Two shaft vacuum pump with cantilevered rotors

Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate

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Two-shaft vacuum pump

Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2823212

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