Mechanical pencil
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 8, 1988
Grant Date -
N/A
app pub date -
May 7, 1986
filing date -
Jul 18, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Mechanical pencil in which a chuck assembly for gripping a lead is formed with plural chuck elements mutually combined with each other. The chuck assembly has an internal longitudinal hole to insert a lead through and a lead gripping portion to grip the lead, while a lead guide tube is movably inserted within the lead inserting hole. The lead guide tube pushes on acting portions of the chuck to open the gripping portions of the chuck elements in the direction of parting them from each other when the lead guide tube is advanced, and the lead gripping portion opens to release the lead. The chuck is designed to enable releasing and gripping the lead securely so that it can be suitably used as a chuck mechanism for extending the lead automatically.
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Family
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Cited Art Landscape
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