4. Rotary expansible chamber devices
  5. Methods

Hartmut Kriehn

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Apparatus and process for operating a dry-compression vacuum pum

Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent

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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
Reexamination Certificate

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Dry-running twin-shaft vacuum pump

Rotary expansible chamber devices – Multistage – Interengaging rotary members
Patent

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Method of operating a claw-type vacuum pump and a claw-type vacu

Rotary expansible chamber devices – Methods
Patent

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Muffler

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent

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Profile ID: LFUS-PAI-P-1037275

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