Variant length pleated filter element
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United States of America Patent
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-
Jun 16, 1987
Grant Date -
N/A
app pub date -
Nov 12, 1985
filing date -
Jul 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter element adapted to be incorporated in filter devices such as air filter, oil filter and fuel filter is disclosed which includes a pair of end plates and a filter material folded so as to form a series of pleats and disposed between the end plates to define a hollow cylinder having outer and inner circumferences. The space between the circumferences is divided into at least six areas to contain the pleats with symmetrical pattern. Each of the areas includes a group of the inner ridges, through which the pleats are connected to each other, arranged substantially along the pleat in the adjacent area to thereby vary the length of the pleats connected through the inner ridges of the group.
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