发明授权
- 专利标题： Writing instrument
- 专利标题（中）： 书写工具
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申请号： US358051申请日： 1994-12-16
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公开(公告)号： US5551788A公开(公告)日： 1996-09-03
- 发明人: Martin E. Wacha , Evan K. Pennell
- 申请人： Martin E. Wacha , Evan K. Pennell
- 专利权人： Wacha; Martin E.,Pennell; Evan K.
- 当前专利权人： Wacha; Martin E.,Pennell; Evan K.
- 主分类号： B43K24/06
- IPC分类号： B43K24/06 ; B43K7/12
摘要：
A writing instrument with an advance-retract mechanism is operable by rotation of a knob opposite the writing tip. The knob rotates a shaft disposed in, and extending rearwardly from, the instrument body to advance and retract the writing tip when rotated. A retainer member has a first cylindrical portion with a plurality of inwardly extending tangs into which the shaft is received and a larger cylindrical portion having a surface directed toward the instrument body.
公开/授权文献
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