Tension detecting device
US7252307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2004 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Jun 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/103
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An end portion of a webbing belt is attached to a metal base plate, in which a hole is formed. A projecting portion is formed at an inner edge of the hole which inner edge is at a side opposite a belt attachment portion. When tension is applied to the webbing belt, due to a fixed plate engaging with the projecting portion, a tensed portion of the metal base plate between the belt attachment portion and the hole extends and the projecting portion contracts in the direction of the tension. As a result, first strain gauges mounted to the tensed portion output a signal corresponding to extension, and second strain gauges mounted to the projecting portion output a signal corresponding to contraction. A tension detecting device detects the tension on the basis of a large difference in outputs of the first strain gauges and the second strain gauges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.