Overload indicator for hoist
US9791357B2 · kind B2 · utility
1Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2015 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Nov 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/047
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An overload indicator for a hoist includes first and second blocks that connect to the lifting medium (a chain for a chain hoist) at spaced locations. The first and second blocks are held at a spacing by indicator bands so that the lifting medium is slack between the blocks. The indicator bands have weakened portions to deform, stretch or break when subject to a load over a threshold, such as over a lifting capacity of the hoist. Covers are provided over the indicator bands that are closely spaced to define an indicator gap. If the indicator bands stretch, the indicator gap increases to indicate an overload condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.