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F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
F04B39/042—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod sealing being provided on the piston
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FR696157D1929-06-111930-05-27
Improvements to pressurized fluid motors, pumps or compressors
ExpiredFR696157A
(en)