Tape measure with multiple spring retraction
US11231261B2 · kind B2 · utility
4Cited by
20References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2018 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Jan 26, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2003/103
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system includes at least two springs that drive a tape spool during tape retraction. The springs are indirectly coupled to each other via a single center post, in one embodiment, two center posts on a single spool, in another embodiment, or two center posts that are on different spools, in another embodiment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.