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

Michael Froitzheim

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Mechanical kinetic vacuum pump

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Coating – specific composition or characteristic
Reexamination Certificate

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Mechanical kinetic vacuum pump with rotor and shaft

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Specific casing or vane material
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-2823213

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