Disposable instrument pen with integral spring member
US4307410A · kind A · utility
1Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 8, 1979 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Nov 8, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D15/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disposable instrument pen with integrally-formed spring member simplifies installation and provides its own biasing means for urging the pen nib into engagement with a writing surface and/or for retaining the pen in a pen mounting carriage. In various alternative embodiments, the spring member may consist of a cantilever arm, a torsion bar with end mount fixtures, a helical spring, flared wings, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.