Motor vehicle vacuum pump

Abstract

A motor vehicle vacuum pump includes a pump housing which encloses a pump chamber, a pump rotor bearing, a pump rotor, a coupling unit rotationally fixed to the pump rotor which connects the pump rotor to a drive shaft, and a lubricant supply assembly which lubricates the pump chamber, the pump rotor bearing and/or the coupling unit. The pump housing has a lubricant inlet opening. The pump rotor is arranged in the pump chamber via the pump rotor bearing. The lubricant supply assembly includes a lubricant outlet opening and a lubricant supply duct which is arranged in the pump housing so that a lubricant is pumpable from the lubricant inlet opening towards the pump chamber, the pump rotor bearing and/or the coupling unit, to the lubricant outlet opening. A seal element is arranged in a region of, and a filter element is arranged in, the lubricant inlet opening, respectively.

What is claimed is: 
     
         1 - 7 . (canceled) 
     
     
         8 . A motor vehicle vacuum pump comprising:
 a pump housing configured to enclose a pump chamber, the pump housing comprising a lubricant inlet opening;   a pump rotor bearing;   a pump rotor comprising at least one movably mounted pump rotor blade, the pump rotor being arranged in the pump chamber via the pump rotor bearing;   a coupling unit which is rotationally fixed to the pump rotor and which is configured to directly or indirectly connect the pump rotor to a drive shaft;   a lubricant supply assembly configured to lubricate at least one of the pump chamber, the pump rotor bearing, and the coupling unit, the lubricant supply assembly comprising a lubricant outlet opening and at least one stationary lubricant supply duct which is arranged in the pump housing and which is configured so that a lubricant can be pumped therethrough from the lubricant inlet opening of the pump housing in a direction of at least one of the pump chamber, the pump rotor bearing, and the coupling unit, to the lubricant outlet opening;   a seal element arranged in a region of the lubricant inlet opening; and   a filter element being arranged in the lubricant inlet opening,   wherein,   the seal element the filter element are formed as a combined seal/filter unit.   
     
     
         9 . The motor vehicle vacuum pump as recited in  claim 8 , wherein,
 the filter element comprises an edge element, and   the seal element is arranged on the edge element of the filter element.   
     
     
         10 . The motor vehicle vacuum pump as recited in  claim 8 , wherein the combined seal/filter unit is formed as a single piece. 
     
     
         11 . The motor vehicle vacuum pump as recited in  claim 10 , wherein the seal element is injection-molded to the filter element. 
     
     
         12 . The motor vehicle vacuum pump as recited in  claim 8 , wherein the filter element comprises a filter nozzle. 
     
     
         13 . The motor vehicle vacuum pump as recited in  claim 8 , further comprising:
 a pump rotor outer surface; and   a lubricant duct,   wherein,   the pump housing further comprises a hollow-cylindrical surface,   the pump rotor outer surface is mounted in the hollow-cylindrical surface of the pump housing,   the lubricant duct is configured to extend in an axial direction in the hollow-cylindrical surface, and   the lubricant supply assembly is further configured so that the lubricant outlet opening is at least temporarily fluidically connected to the lubricant duct.   
     
     
         14 . The motor vehicle vacuum pump as recited in  claim 13 , wherein the lubricant duct is further configured to open towards the pump chamber so that the lubricant can be transferred into the pump chamber. 
     
     
         15 . The motor vehicle vacuum pump as recited in  claim 14 , wherein the lubricant duct is further configured to flare towards the pump chamber.