Apparatus for venting a transmission

Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing

Reexamination Certificate

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Details

C055S327000, C055S331000, C055S336000, C055S463000, C055S385300, C055S385400, C055SDIG017, C095S268000, C074S60600R, C220S371000, C220S373000, C220S374000

Reexamination Certificate

active

10065811

ABSTRACT:
Device for the ventilation of a transmission case (11) that is normally intended to hold liquid lubricant for transmission components and includes a residual internal volume of air inside the transmission case that is connected to the atmospheric pressure by way of a passage. With the aim of reducing the quantity of dirt particles than can get into the transmission case by way of the said passage, the passage includes a first section (27) with a certain flow area and a second section (26) with, by comparison, an at least approximately 50% larger flow area. The first section (27) is situated between the atmosphere and the second section (26). A compressed air source (18) is connected to the passage between the internal volume of the transmission case (11) and the first section (27).

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