Patent ID: 9209661
Filing Date: 2015-12-08
Classification: H02K

Abstract:
1. An electric machine housing comprising: a housing body including an outer surface having a plurality of materially integrally formed ribs defining a plurality of coolant channels, each of the plurality of materially integrally formed ribs having an outer surface portion; an annular seal provided on the outer surface portion of each of the plurality of ribs, the annular seal comprising a yield concentration ridge configured and disposed to yield into the sleeve upon thermal expansion of the housing to establish a seal between adjacent ones of the plurality of coolant channels; and a sleeve provided on the housing body extending about the outer surface, the sleeve having an inner surface section that is matingly engaged with the outer surface portion of each of the materially integrally formed ribs, wherein the housing body is formed from a first material having a first coefficient of thermal expansion and the sleeve is formed from a second material having a second coefficient of thermal expansion that is lower than the first coefficient of thermal expansion.