Hybrid spring and electric motor tape rule
US10422616B2 · kind B2 · utility
8Cited by
52References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2017 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Jul 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2003/103
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tape rule having a housing, a hub, a reel, a tape, a spring, and a motor. The hub and reel are rotatably mounted within the housing. The tape is wound around the reel. The spring is wound around the hub and is attached to at least one of the reel and the tape. The motor is disposed adjacent to the hub and is configured, when activated, to rotate the hub to adjust an amount by which the spring is wound around the hub.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.