One-way valve, valve unit assembly, and ink cartridge using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 13, 2009
Grant Date -
Dec 29, 2005
app pub date -
May 31, 2005
filing date -
Apr 3, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A one-way valve, a valve unit assembly and ink cartridge using this valve or valve unit assembly for controlling ink flow are disclosed. The one-way valve includes a foot support portion, a wall support portion projecting at an angle from an interior side of the foot support portion, a shoulder support portion bending towards an interior side of the wall support portion, and a head support portion projecting from a shoulder support portion with a through hole. The valve unit assembly includes a bottom cover with a through hole for holding the one-way valve, a pressing cover with a through hole, and an elastic one-way valve disposed between the bottom cover and the pressing cover. The pressing cover is maintained selectively in contact with the head support portion through hole by a pressure difference. The one-way valve and the valve unit assembly are disposed in an ink chamber to replace a porous member usually used in the ink chamber. As a result, the ink cartridge using the one-way valve can store more ink and remaining ink is handled in a more environment friendly manner.
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Family
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Cited Art Landscape
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