Writing instrument with cushioning element
US7137751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Oct 23, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y80/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing instrument having a writing tip that responds to pressure applied during writing through the use of a cushioning element integrally formed with another part of the writing instrument. In a preferred embodiment, a writing instrument comprises a barrel, a cartridge with a writing tip, and an end plug with a cushioning element formed integrally with the end plug. The cartridge may be held in the barrel via the cushioning element, which is attached to the proximal end of the barrel. The end plug may be formed by an injection molding process. A stop element may be provided to inhibit or to prevent compression of the cushioning element after a predetermined degree of compression of cushioning element. The cushioning element may have a variable spring rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.