Passive variable friction pen
US12030339B2 · kind B2 · utility
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20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 2021 |
| Grant date | Jul 9, 2024 |
| Priority date | — |
| Expiry date | Sep 3, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K1/086
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing instrument configured to apply a writing material or liquid to a surface, comprising a socket, and a ball arranged in the socket, characterized by at least one first component which is arranged to come into contact with the ball, wherein the at least one first component comprises a first material having surface properties such that the friction coefficient between the ball and the at least one first component decreases when the force acting from the ball on the at least one first component increases at least within a certain range of forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.