Mechanical pencil
US6705789B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2001 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Oct 3, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K21/027
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A mechanical pencil has a tubular member having a front end and a rear end. A slide member is disposed at the front end of the tubular member for axial sliding movement therein. The slide member has a lead passageway for receiving a pencil lead. A lead advancement mechanism undergoes axial movement within the tubular member and has a chuck body for undergoing advancing movement to advance the pencil lead through the lead passageway of the slide member and toward the front end of the tubular member and for undergoing retracting movement toward the rear end of the tubular member. The slide member is disposed in frictional engagement with the chuck body for retracting movement therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.