Adjustable roller furling spar
US4449468A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1983 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | May 19, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H9/1042
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An adjustable roller furling spar includes an elongated base member which is securable on a sailboat and an adjustable periphery assembly which is attached to the base member and coextends a distance therewith. The periphery assembly is adjustable to define an effective winding cross-section of the spar which is variable along the longitudinal extent thereof and which is operable for windingly receiving a sail on the spar. By properly adjusting the periphery assembly, it is operable to compensate for irregular stretch in older sails when the spar is used for reefing so that even a badly stretched sail can be maintained in a substantially flat disposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.