Patent No. EP4264050 (titled "Compressor, Disc Body And Seal") was filed by Neuman & Esser on Dec 14, 2021. The application was issued on Jan 29, 2025.
A compressor comprises a stationary part and a part oscillating along a main axis, defining an axial leakage path. Multiple annular chambers are arranged axially in succession between these parts, with at least one chamber containing a seal to close or reduce the leakage path. A plurality of bypasses fluidically interconnect pairs of chambers. To distribute pressure differences more homogeneously across seals and reduce wear at high-pressure and low-pressure extremes, the compressor is characterized by a graduated bypass design: any bypass located closer to the high-pressure side possesses a minimum cross-section smaller than that of a bypass located closer to the low-pressure side. This configuration is applicable to both piston rings and piston rod packings.

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