Slide-type writing instrument with a dry prevention unit
US7220073B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2004 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Jun 27, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K23/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A slide-type writing instrument with a dry prevention unit which allows a nib to be extended and exposed to an outside through a non-contact extension operation while sealing a portion around the nib, prevents ink of the nib from being dried up without using any cap, and safely protects the nib. A slide-type writing instrument with a dry prevention unit comprises a shaft to provide a body of the writing instrument, with a nib hole provided at a lower end of the shaft; a knock part inserted into an insert hole provided at an upper end of the shaft; a cartridge inserted into the shaft while being coupled at opposite ends thereof to the knock part and a nib, respectively; first and second springs coupled to the cartridge to elastically bias the cartridge in an axial direction of the cartridge; a link holder provided in the shaft and supported by the first spring; a link slidably inserted into the link holder and supported by the second spring, the link including a link projeciion to engage with a guide groove provided on a predetermined portion of the cartridge; and a spherical door having a pin slit to engage with a parallel pin of the link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.