Patent ID: 6190149
Filing Date: 2001-02-20
Classification: F04C

Abstract:
An oil distribution system for distributing lubricating oil to a bearing mounted within a vacuum pump comprising a cylinder and at least one rotating piston arranged within the cylinder, the cylinder being arranged adjacent to one side of the bearing, the bearing being in fluid communication with the cylinder, said oil distribution system comprising:a shaft supported on the bearing for rotational motion of said shaft, the piston being mounted on said shaft, said shaft having a longitudinal passage extending from one end to at least a point adjacent to the other side of the bearing;a port extending from said passage and exiting said shaft at about said point adjacent to the other side of said bearing;a pump positioned adjacent to said one end of said shaft, means operatively connecting said pump to said shaft for driving said pump when said shaft rotates, said pump having an inlet for admitting the lubricating oil to said pump and an outlet connected to said passage for discharging the lubricating oil into said passage, the lubricating oil exiting said passage through said port and passing through and lubricating the bearing, the lubricating oil entering said cylinder after passing through the bearing and providing an oil seal between the piston and the cylinder.