4. Internal-combustion engines
  5. Lubricators
  6. Crankcase, pressure control

Richard P. Riefel

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Engine driven vacuum pump

Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent

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Rotary hydraulic vane pump with undervane passages for priming

Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Annular groove or recess completely encircles rotation axis
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Profile ID: LFUS-PAI-P-409253

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