Mechanical pencil
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 30, 2014
Issued Date -
N/A
app pub date -
Nov 15, 2010
filing date -
Nov 20, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A mechanical pencil comprises a shaft cylinder (1), a lead pipe (3) axially movably inserted into the shaft cylinder (1) and biased in a retract direction, and a chuck body (45) provided within the shaft cylinder (1) in front of the lead pipe (3) for releasably griping a writing lead (S). The lead pipe (3) and the chuck body (45) are separated, the lead pipe (3) is inserted into the shaft cylinder (1) with axial movement thereof being permitted and circumferential rotation thereof being restricted, and the chuck body (45) is positioned within the shaft cylinder (1) in front of the lead pipe (3) so as to be movable in an axial direction and circumferentially rotatable. A lead rotation mechanism (5) is provided between a back part of the chuck body (45) and a front part of the lead pipe (3). When the lead pipe (3) is advanced by a knocking operation or retracted by the release of the knocking operation, when writing pressure is applied to the writing lead (S), and when the writing pressure is released, the lead rotating mechanism (5) rotates the chuck body (45), but does not transmit the rotation force to the lead pipe (3).
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully