Hydraulic boat lift
US8061932B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jun 19, 2009 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Mar 6, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B27/36
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic boat lift assembly will raise and lower a boat cradle remotely, and will securely lock the cradle in an uppermost storage position. The lift as provided with a manual mechanism for unlocking the cradle from its uppermost storage position for operation when the hydraulic system is not available. The lift has a support frame that is mountable on the outside of the transom of a boat with hydraulic connections to a hydraulic system and controls within the boat. A lift mechanism connected to the support frame raises and lowers a cradle that supports a small boat or tender. The lift mechanism includes one or more hydraulic lift cylinders. In a retracted position of the lift cylinder, the cradle is elevated above the water in a storage position when the boat is under way. To ensure security of the tender, the lift mechanism employs a lock cylinder that prevents inadvertent motion of the lift cylinder from the retracted position by mechanical and hydraulic mechanisms. The lock cylinder must be deliberately unlocked by the hydraulic system before the lift cylinder will lower the cradle. A manual unlock mechanism is provided for use when the hydraulic system is unavailable and th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.