Adjustable self-releasing hook
US4537434A · kind A · utility
5Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 1984 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | May 2, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C1/38
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A load lowering hook is equipped with a spring biased load holding member ich ejects and disengages the load rigging when the load touches down and the majority of the weight is released. The spring loaded member can be adjusted to disengage the load at a preset weight depending upon the weight of the rigging that will still be pulling on the hook after the load touches down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.