Convertible writing instrument

US6264389A · kind A · utility

Inventor

• Robert Ducharme · Ste. Anne, CA

Key dates

• Filing date: Oct 10, 2000
• Grant date: Jul 24, 2001
• Expiry date: Oct 10, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B43K31/00
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A writing instrument comprises a front tubular member having a threaded end and a conically configured end. The writing instrument further includes a rear tubular member having a threaded open end adapted to selectively engage the threaded end of the front member in either a storage or use configuration. An inner front tubular member is disposed in the front tubular member and is not rotatable therein. The inner front tubular member defines an inclined path at an oblique angle relative to a longitudinal axis thereof. A tubular actuator member is coupled to the inner front tubular member and is rotatable relative thereto. The actuator member includes a hub adapted to engage the inclined path and move therein upon rotation of the actuator member. A writing refill is inserted in the actuator and inner front tubular members. The refill includes a writing tip at one end and a knob at an opposed end. A rotation of the knob causes a corresponding rotation of the refill and, therefore, an extension or retraction of the writing tip relative to the conical end of the front tubular member. The threaded ends of the front and rear tubular members allow these members to be threadably coupled tog…