Patent ID: 6264389
Filing Date: 2001-07-24
Classification: B43K

Abstract:
A writing instrument, comprising:a front tubular member having a first threaded end and a second end;a rear tubular member defining an open end adapted to removably receive said first threaded end of said front tubular member;an inner front tubular member disposed in said front tubular member in a friction fit relationship;a tubular actuator member coupled to said inner front tubular member and rotatable relative thereto, said actuator member having a first threaded end;a writing refill inserted in said actuator member and said inner front tubular member, said refill having a writing element disposed at one end and a knob fixedly attached to an opposed end thereof, said knob having threads adapted to engage said first threaded end of said actuator member;said inner front tubular member defining an inclined path extending at an oblique angle relative to the axis of said inner front tubular member, said inclined path having a first end and a second end; anda hub extending from a second end of said actuator member and engaging said inclined path, said hub being slidable in said inclined path between said first and second ends thereof upon a rotation of said actuator member, whereby said writing element of said refill is selectively extended or retracted from said inner front tubular member upon a rotation of said knob by a user.