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US 6,297,448 B1Granted
Inner and outer pressure equalization structure for an airtight case
AssigneeTokai Kogyo Kabushiki Kaisha
InventorKouichi Hara
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AssigneeTokai Kogyo Kabushiki Kaisha
InventorKouichi Hara
Estimating the term…
An inner and outer pressure difference alleviating device for an air tight case (10) is provided including a housing (20) and a cover (30). The cover is adapted to close an opening in housing (20). A diaphragm portion (34) that is made from a flexible material is formed integrally with cover (30) or a side wall of the housing (20). When a pressure difference between the inside and outside of the airtight case (10) is produced by heat generated by electric and electronic components contained in housing (10) diaphragm portion (34) elastically deforms to change the inner volume of airtight case (10) and eliminate the pressure difference between the inside and outside of airtight case (10) automatically, while retaining the air-tightness of the airtight case (10).
An inner and outer pressure equalizing structure for an airtight case containing electric and electronic components and including a housing having an opening closed by a cover, in which structure:
An inner and outer pressure difference alleviating structure for an airtight case containing electric and electronic components and including a housing having an opening closed by a cover, in which structure a diaphragm portion made from a flexible material integrated with the cover or the housing, wherein the diaphragm portion is covered with a protective cover having through holes.
An inner and outer pressure difference alleviating structure for an airtight case containing electric and electronic components and including a housing having an opening closed by a cover, in which structure a diaphragm portion made from a rubber material and having a projecting portion integrated with at least one of the cover and the housing, wherein the diaphragm portion covered with a protective cover having through holes.
An inner and outer pressure difference alleviating structure for an airtight case containing electric and electronic components and including a housing having an opening closed by a cover, in which structure:
Dependencies are inferred from the claim text.