Filter structure of igniter
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United States of America Patent
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Issued Date -
Aug 11, 2005
app pub date -
Nov 12, 2004
filing date -
May 21, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A filter structure for an ignitor is provided, in which a flame length is kept uniform by ensuring constant gas permeability and ease of assembly of the filter is achieved. When causing ejection and combustion of fuel gas, which is contained in a tank chamber (24), out of a discharge nozzle (3) via a filter (71) which serves to keep the gas passage rate flowing therethrough constant and a valve mechanism (4) for starting and stopping feeding of the gas, the filter (71) is made of a membrane film (71a), which has pores and serves to keep the passage rate of the gas flowing therethrough constant; and a permeable porous body (71b) placed on the membrane film. A filter component (7) for affixing the filter (71) to the holder (72) is assembled on the upstream side of the valve mechanism (4). The holder (72) has a centrally formed vent hole (72c), the filter (71) is welded to the holder along the peripheral edge of the vent hole (72c), and the membrane (71a) and porous body (71b) of the filter are not joined together within the region corresponding to the region within the vent hole (72c) of the holder.
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