Windsurfer rig training aid and protective support for the rig universal joint
US5030099A · kind A · utility
Inventors
Key dates
| Filing date | Nov 30, 1989 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Nov 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B9/066
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
There is disclosed a new teaching aid and support device for use with a windsurfer rig, which rig usually includes a mast, a boom, a sail, and a universal joint. The teaching aid and support device comprises a stationary base member for supporting the windsurfer rig. The stationary base member is in the form of a shallow, inverted receptacle having a top planar surface and depending side walls which are arranged and constructed so that when the bottom edges of the sidewalls of the base member are placed on the ground the base member is securely and non-rotatably supported from the ground. The top planar surface of the base member has a suitable mast receiver opening whose vertical center line is near the geometrical center of the base member. The device also includes an arrangement for securing the mast to the base member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.