Writing implement with simultaneous retractable ends
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 16, 2014
Grant Date -
Jan 19, 2012
app pub date -
Mar 23, 2010
filing date -
Mar 24, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A writing implement, with retractable ends, an upper shaft and lower shaft coupled together and rotatable relative to each other, a cartridge and an eraser holder in an intermediate connection member are simultaneously movable in upward and downward directions. The cartridge having a writing nib; the connection member having a slit; the lower shaft coupled to the connection member, a nib hole for extending/retracting the nib therethrough; the upper shaft having a thread enabling the cartridge to move with the integrated rotation of the connection member and lower shaft; a cam coupled to the upper shaft, having an inner wall with a protrusion; an eraser holder engages the protrusion and slit and rotates in upward and downward directions with the rotation of the connection member and lower shaft; and a ball shutter in the lower shaft to open/shut the nib hole by means of the vertical sliding of the cartridge.
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