Trolling line depressor
US4951413A · kind A · utility
9Cited by
23References
6Claims
0Family size
Inventors
Key dates
| Filing date | May 24, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | May 24, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K91/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A troll line depressor includes a pair of triangular wings with a dihedral angle of about 100 degrees therebetween. A rigid bridle connected between the upper and lower ends of the depressor provides a sliding connection for a ring at the end of a towing line, so that the depressor normally develops hydrodynanmic forces to depress the end of the towing line, but can tilt backward to an inoperative position when a fish strikes, or forward to an inoperative position if the depressor engages river bottom debris.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.