Scroll-type compressor having improved pressure equalizing passage configuration
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United States of America Patent
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Nov 10, 1998
Grant Date -
N/A
app pub date -
Nov 15, 1996
filing date -
Nov 18, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A scroll-type compressor has a scroll plate with at least first and second pressure equalizing passages formed in its end plate such that the first and second pressure equalizing passages will be in the same crescent shaped pocket during at least a portion of a crescent shaped pocket's radially inward movement. The minimum pressure in a back pressure pocket will be adequate to maintain a good seal, any pressure increases will increase in accordance with the increased pressure in the crescent shaped pockets. At no point are both of the pressure equalizing passages blocked and, therefore, the pressure in the interior space does not overwhelm the effective functioning of the back pressure pocket.
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