| 摘要 |
<p>An apparatus and system for venting a transmission (10) is disclosed which provides a transmission breather (12) which allows pressure equalization between the interior and exterior of the transmission while reducing or eliminating fluid expulsion from the transmission. The breather comprises a standpipe (18), a bowl (20) having a first end (70) secured to the standpipe and at least one aperture (80), a shroud (22) secured to the standpipe, and a filter (90) disposed between the bowl and the standpipe. The standpipe has a first end (30), a second end (32) and an intermediate portion (34) extending axially between the first and second ends. The second end of the standpipe has at least one surface (46) for transmitting torque to the standpipe to enable the breather to be top drivable to facilitate installation and removal of the breather with the transmission. The intermediate portion has an axially extending central passage (60) and at least one radially extending passage (64). The shroud restricts the entry of external contaminants into the transmission through the breather. Air, transmission fluid, mist, and vapor flow through the passages of the standpipe and through the filter which captures the fluid, mist and vapor while allowing filtered air to be vented to the environment through the at least one aperture. The filter facilitates coalescence of the transmission fluid which is returned to the transmission via the passages in the standpipe. <IMAGE></p> |
