Bearing systems for sailcraft gooseneck units
US4557212A · kind A · utility
Inventor
Key dates
| Filing date | May 7, 1984 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | May 7, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H9/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Bearing systems for gooseneck units used to hold booms onto the masts of sailcraft comprise a pair of substantially identical bearing members, except that the central longitudinal bore of one member is smaller than such bore of the other member. Each of the members comprise a small portion that can fit into the longitudinal channel of the slide member of the gooseneck unit and a large, integral portion that will not fit into the channel, but is contoured to slide within a vertical track in the aft side of the mast of the sailcraft. The pair of bearing members is fastened into the channel of the slide member by a screw long enough to span the channel, which screw has a diameter smaller than the larger bore of the bearing members, but larger than the smaller bore of the bearing members permitting the screw to be threaded into the smaller bore. Preferably, the bearing members are made of low friction, plastic material so the large portions of such members will slide easily, vertically in the mast vertical track enabling the boom to be readily raised or lower along the mast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.