Appeal No. 96-3011
Application No. 08/165,313
Appendix
1. An oil cooler for motor vehicles, having an outer
tube and an inner tube which is disposed within the outer tube
and whose outer surface, together with the inner surface of
the outer tube are spaced form each other to establish a gap
therebetween and thus to form and annular channel, sealed in
both ends, for feeding oil to be cooled, from an inlet at a
first end of the tubes to an outlet at a second end of said
tubes, a means provided in the annular channel for ensuring
heat transfer from the passing oil to the surrounding tube
walls, and a turbulence-generating means provided on the outer
surface of the outer tube for a coolant, in which the oil
cooler is submerged, characterized in that the turbulence-
generating means consists of cup-shaped dimples formed on the
outer surface of the outer tube, said cup shaped dimples also
being spaced from said outer surface of said inner tube.
8. An oil cooler for motor vehicles, having an outer
tube and an inner tube which is disposed within the outer tube
and whose outer surface, together with the inner surface of
the outer tube are spaced from each other to establish a gap
therebetween and thus to form an annular channel, sealed in
both ends, for feeding oil to be cooled, from an inlet at a
first end of said tubes to an outlet at a second end of the
tubes, a means provided in the annular channel for ensuring
heat transfer from the passing oil to the surrounding tue
walls, and a turbulence-generating means provided on the outer
surface of the outer tube for a coolant, in which the oil
cooler is submerged, characterized in that the turbulence-
generating means consists of bump-like projections formed on
the outer surface of the outer tube, said bump-like
projections also being spaced from said outer surface of said
inner tube.
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Last modified: November 3, 2007