Noise reduction in gear transmission

Claim 1

A lubricated gear system in a vehicle transmission comprising: first and second gear wheels including hubs rotatable about spaced, parallel axes and having gear teeth about the periphery of each of said hubs adapted for mutual meshing engagement; means forming a wall on each side of said gear teeth substantially closing the spaces between adjacent gear teeth about the periphery of said first gear wheel, said means being sufficiently radially extensive to overlie the ends of the gear teeth on both of said gear wheels in th region of their meshing engagement; a sump containing a body of fluid lubricant disposed subjacent said second gear wheel and whereby the lower peripheral region of said second gear which is immersed in said sump; a vessel separate from and elevated above said sump in subjacent relation to said first gear wheel and forming an enclosure about the lower peripheral region of said first gear wheel which enclosure extends to a point in close proximity to the region of meshing engagement between the teeth of the respective gear wheels; means for forming a lubricant supply tube penetrating said vessel and adapted to discharge lubricant directly on the teeth of said first gear wheel; and a pump operatively connected between said sump and said lubricant supply tube for supplying lubricant from said sump to said supply tube.