Crane hook
US4763943A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Nov 14, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C1/34
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for retrieval and launching of lifeboats, buoys or the like includes a lifeboat provided at a point centrally above the hull, with a rigid, inverted V-shaped suspension member adapted to be engaged by a suspension hook the structure of which allows that it can be engaged with the lifting member or eye without assistance from the lifeboat itself. The hook is also provided with means for preventing inadvertent release thereof, including a downwardly directed nose portion. The engagement of the hook with the suspension member without assistance from the lifeboat is made possible by rolling bars which cause the hook to turn into engagement with the rigid lifting eye of the boat as the hook is lowered into contact therewith. When launching lifeboats or the like, a loosely suspended secondary hook, held by the main hook, holds the boat. The secondary hook is provided with a tag line which, when pulled, results in swinging the secondary hook relative to the main hook thus moving the hook away from the lifting eye of the lifeboat. In another embodiment of the hook, a scissors arrangement is provided which facilitates the release of the hook on launching the boat, while providing, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.