Invention Grant
- Patent Title: Rotary pencil
- Patent Title (中): 旋转铅笔
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Application No.: US12876313Application Date: 2010-09-07
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Publication No.: US08696226B2Publication Date: 2014-04-15
- Inventor: Stefan Hornfeck
- Applicant: Stefan Hornfeck
- Applicant Address: DE Stein
- Assignee: Faber-Castell AG
- Current Assignee: Faber-Castell AG
- Current Assignee Address: DE Stein
- Agent Laurence A. Greenberg; Werner H. Sterner; Ralph E. Locher
- Priority: DE102009040134 20090904; DE102009055240 20091223
- Main IPC: A45D40/04
- IPC: A45D40/04

Abstract:
A rotary pencil includes a sleeve-shaped shaft having a front end and a rear end, a threaded spindle mounted to be fixed against rotation and axially movable in said shaft and having an at least single-start external thread. At least one threaded element is fixed in axial and rotating directions relative to the shaft and engages into the external thread. The front end of the external thread is adjoined by a cylindrical spindle section which extends over the entire circumference of the spindle, namely a free-running section, and has an external diameter corresponding to a core diameter of the external thread.
Public/Granted literature
- US20110058887A1 ROTARY PENCIL Public/Granted day:2011-03-10
Information query
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