Disposable instrument pen with integral spring member
US4233609A · kind A · utility
2Cited by
13References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1978 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jun 7, 1998 |
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.