Patent ID: 7900535

Claim:
A transmission comprising: a rotatably supported shaft rotatable about a longitudinal axis and having an interior longitudinal oil passage, said shaft adapted to partly lift and stir lubricant in response to rotation of the shaft; and a lubricating mechanism including a lubricant containment structure having an upper end placed at a position higher than the shaft, the upper end opening in an upward direction so as to collect and store the lifted lubricant, the lubricant containment structure including a partition wall having an upper end lower than the upper end of the lubricant containment structure, and extending from a bottom portion of the lubricant containment structure to divide an inside of the lubricant containment structure into plural portions, a lower end of the partition wall disposed above the axis, one of the plural portions possessing an oil supply port through which the lubricant is guided to the oil passage through an end of the shaft, and an other of the plural portions possessing an auxiliary oil supply port through which the lubricant is guided to a region distinct from the oil passage of the shaft, one side of the partition wall arranged to contact lubricant in the one of the plural portions and an other side of the partition wall arranged to contact lubricant in the other of the plural portions to thereby prevent fluid communication between the one portion and the other portion except over the upper end of the partition wall, wherein the oil supply port and the auxiliary oil supply port are non-serially arranged so that the lubricant flows through the oil supply port to the oil passage of the shaft independent of whether lubricant flows through the auxiliary oil supply port to the region distinct from the oil passage of the shaft.