Patent ID: 8858204

Claim:
Dry-type vacuum pump comprising: at least one pumping stage, at least one rotary shaft supported by a lubricated support bearing, at least one lubricant deflector and one ring seal mounted on the rotary shaft, the ring seal being mounted between the lubricant deflector and the pumping stage, the lubricant deflector being mounted between the lubricated support bearing and the ring seal, a first reservoir containing a first reserve of liquid lubricant, said first reservoir being in communication with the lubricated support bearing in a first volume, a lubricant splashing unit mounted on the rotary shaft in the first reservoir, one end of the lubricant splashing unit being bathed in the first reserve of liquid lubricant, wherein the vacuum pump has a second reservoir comprising a second reserve of liquid lubricant, the second reservoir being separated from the first reservoir by a separation wall having a communication aperture that puts the first and the second reserves of liquid lubricant into communication and wherein a lubricant return channel having one inlet situated so as to be facing said lubricant deflector opens into a second volume of the second reservoir above the second reserve of liquid lubricant through an opening.