Filter material for motor vehicles
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United States of America Patent
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-
Mar 7, 1995
Issued Date -
N/A
app pub date -
Aug 10, 1993
filing date -
Jan 23, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An adsorption filter to prevent the emission of hydrocarbons from the tanks of motor vehicles comprises a highly air-permeable, substantially stable, three-dimensional bearer structure of wires, monofilaments or webs to which is secured a layer of granular, especially bead-structured adsorbent particles with a diameter of 0.1 to 1 mm, whereby the size of the micropores of the adsorbent is reduced in the direction of flow of the hydrocarbons emitted.
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