Telescopic ball-point pen

Details Telescopic ball-point pen Telescopic ball-point pen

2005-09-13

2005-09-13

Walczak, David J. (Department: 3751)

Coating implements with material supply

Projectable and retractable tool

By screw mechanism

C401S099000

Reexamination Certificate

active

06942411

ABSTRACT:
A telescopic ball-point pen includes a tubular body, including a sliding axial tube, which in turn includes a refill tank. An interior surface of the body and an exterior surface of the sliding axial tube are threaded to form a driver screw portion, and an interior surface of the sliding axial tube and an exterior surface of the refill tank are threaded to form a follower screw portion. A pitch of the follower screw portion is greater than that of the driver screw portion so that the amount of front-and-back movement of the refill tank is greater than that of the sliding axial tube per rotation. A rear end of the sliding axial tube is fixed to a sheath. When the sheath and the body are rotated, the tip of a ball-point pen refill removably received within the refill tank is projected beyond, or received within, the pen.

REFERENCES:
patent: 3597100 (1971-08-01), Ganz
patent: 4601599 (1986-07-01), Katoh
patent: 6474889 (2002-11-01), Kato
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patent: 7-32132 (1995-07-01), None
patent: 2509549 (1996-06-01), None
patent: 10-157383 (1998-06-01), None
patent: 2003-127587 (2003-05-01), None

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