BEARING STRUCTURE
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United States of America Patent
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N/A
Issued Date -
Aug 20, 2009
app pub date -
Feb 12, 2009
filing date -
Feb 15, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A bearing structure includes a housing having a bore that penetrates the housing, a rotation shaft inserted into the bore, an annular first metal bearing and an annular second metal bearing, which are provided apart from each other in an axial direction in the bore and rotatably support the rotation shaft, and a ventilation passage provided in the housing. The ventilation passage is formed on the housing-side contact surfaces which are formed on an inner surface of the housing, and bypasses at least one of the first metal bearing and the second metal bearing. Through ventilation passage, a closed area sandwiched between the both first metal bearing and second metal bearing inside the bore communicates with an outside area.
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