Abstract: An apparatus for turbocharging an internal combustion engine, and which is characterized by the ability to avoid excessive heat transfer to the bearings and any other heat sensitive components. In the preferred embodiment, the lubricating oil for the bearings in the turbocharger housing is directed through a passageway in the bearing shaft and is discharged onto the end wall of the bearing housing in a circular pattern, to thereby cool the end wall and minimize heat transfer from the turbine to the bearings in the housing. Also, the end wall of the bearing housing is spaced from the adjacent rear wall of the turbine housing to define a cooling air gap therebetween, and apertures are provided in the housing for permitting air to flow through the cooling gap to cool the opposing surfaces of the two adjacent walls and thereby minimize heat transfer therebetween.

Abstract: A thrust bearing assembly for use in an exhaust gas turbocharger or the like, and which includes a holding plate fixed to the turbocharger housing, a shaft rotatably mounted in the housing and extending through an opening in the plate, and a pair of flat, annular rings mounted on the shaft and receiving the plate therebetween to define a pair of opposing bearing surfaces on each side of the plate. A lubrication system supplies pressurized lubricant to the opposing bearing surfaces, and at least one of each pair of opposing bearing surfaces includes a plurality of generally radially directed channels, whereby a hydrodynamic load bearing pressure is developed in the lubricant between the bearing surfaces during relative rotation thereof, to thereby minimize frictional resistance and wear.

Abstract: An apparatus for calibrating synthetic-resin tubing issuing continuously from a nozzle comprises an inner relatively long tube extending downstream from the nozzle and connected to an exhaust pump. A shorter outer tube surrounds this inner tube and defines therewith an annular chamber. A plurality of axially spaced disks of like outside diameter are carried on this outer tube and the compartments defined between these disks communicate with the annular chamber through holes formed through the outer tube. These holes as well as axially throughgoing holes in the disks are of adjustable flow cross section for aerodynamically balancing the air flow within the tubing as it emerges from the extruder. Thus air injected into the tubing adjacent the nozzle can flow up around the disks, between the compartments of the disks, and from each of these compartments into the annular chamber, to be eventually sucked out through the relatively long tube at the center of the apparatus.