Arrangement for raising or lowering boats or the like
US5020463A · kind A · utility
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C3/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An adjustable davit arrangement is attachable to a pair of pier pilings for raising or lowering a vessel and comprises a first davit mounted on a first pier piling, a second davit mounted on a second pier piling, a rotatable drive pipe extending between respective distal ends of the first and second davits, pick-up flanges disposed near respective ends of the rotatable drive pipe for raising or lowering the vessel via respective cables as the drive pipe is rotated, and a winch motor mounted in proximity to one of the davits and operating with a gear reducing drive drum mounted on the drive pipe so as to cause the drive pipe to rotate, thereby raising or lowering the vessel. Simplicity in assembly and operation, and economy, are achieved by use of a single winch motor. Flexibility in raising boats of various sizes to a desired height above the pier decking, while maintaining a desired lateral distance between the edge of the pier decking and the boat, is achieved by use of adjustable davits having extension arms telescopically slidable in a support arm, in conjunction with adjustable knee braces associated with each davit. The risk of breaking pier pilings is reduced or eliminated b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.