Damp telescopic tube and a damp writing pen
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United States of America Patent
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Oct 9, 2012
Grant Date -
Dec 16, 2010
app pub date -
Feb 22, 2008
filing date -
Aug 20, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A damp telescopic tube and a damp writing pen are disclosed. The damp telescopic tube has at least two metallic tubes in different diameters to be fitted together, which can change the total length of the damp telescopic tube by a small tube slipped over a big tube telescopically. This can solve the questions of controlling handle feeling, quality instability and fricative bad voice between metallic tubes. The damp telescopic tube has at least two metallic tubes in different diameters. A small diameter tube is fitted in a big diameter tube in the two adjacent tubes. A limited location member is provided between the small diameter tube and the big diameter tube. A plastic piston is provided in the end of the small diameter tube which located inside of the big diameter tube and keeps in touch with the inside wall of the big diameter tube.
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