Abstract: A differential gear assembly, in particular for a motor vehicle, includes a gearwheel, driven by a pinion and arranged on a differential case that is rotatably mounted in a gearbox case via rolling-contact bearings on both sides. Planet gears are supported in the differential case on at least one driving pin and meshing with axis-parallel output gears on output half-shafts. The gearwheel is attached to the differential case without form fit in circumferential direction and has recesses into which the at least one driving pin formfittingly projects in circumferential direction.

Abstract: A connecting rod bearing fort supporting a crankpin of an internal combustion engine is provided. The crankpin has a discharge port on its surface for supplying lubrication oil to a gap between the crankpin and the connecting rod bearing constituted by a pair of half bearings. The half bearing includes a main cylindrical portion, crush reliefs and transitional regions. A plurality of crush relief grooves are formed in the crush relief to continuously extend in a circumferential direction, and an axial groove is formed at an inner side end edge of the half bearing in the circumferential direction to continuously extend in an axial direction so that the crush relief grooves communicate with the axial groove.

Abstract: A bearing lubrication (oil circulation) system having a check valve configuration for preventing overflow of an oil reservoir or tank. The pressurized oil circulation system may comprise a pump that pressurizes oil from the tank and circulates the oil through a supply conduit to a bearing, and returns the oil to the tank through a return conduit. The system may include a check valve disposed in the supply conduit and a pilot-operated check valve disposed in the return conduit. The pilot may be taken from the supply conduit upstream of the check valve disposed on the supply conduit. When pressure is discharged from the oil circulation, such as with shutdown of a circulation pump, the check valves automatically close and thus prevent oil contained in the supply and return conduits from draining (i.e., by gravity) to the oil tank. Therefore, flooding of the oil tank with excessive oil is prevented. Furthermore, loss of oil from the bearing sump is also prevented.

Abstract: Oil retention recesses are formed in an outer periphery of the slider block of a scroll compressor. The recesses insure that a quantity of oil is captured and maintained during operation and after shutdown of the scroll compressor. If the scroll compressor is operated or started back up during a “starved” lubricant condition, the captured oil insures the scroll compressor can operate without damage for a period of time such that lubricant can be returned to the sealed compressor.

Abstract: The rotor of a shaded pole motor includes a central housing supported on a stationary shaft by two axially spaced sleeve bearings which are pressed tightly into the housing and which rotate on the shaft. The opposing inboard faces of the bearings are formed with enlarged diameter and circumferentially continuous throats located adjacent the shaft. During rotation of the bearings, oil is pumped continuously though a closed system and forms a pressurized film between the bearings and the shaft so as to reduce friction and wear.

Abstract: The improved rotor bearing lubricating system for the rotor bearing of a Wankel type rotary internal combustion engine comprises an arcuate distribution channel in the surface of the eccentric portion of the mainshaft adjacent the inner bearing surface of at least 180.degree. in length and extending on both sides of an imaginary radial line passing through the point of the maximum throw of the eccentric portion.