Toroidal winch
US4911373A · kind A · utility
1Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1989 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Apr 24, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S242/917
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A winch having a torodially-shaped drum with an axis of rotation and at least one cable wound on the drum having a cable length extending from the drum parallel to and substantially equally spaced from said axis at all times during rotation of the winch. The drum has negatively-curved and positively-curved surfaces joined at a common edge, the cable being wound on the negatively-curved surface and directed therefrom over the positively-curved surface in a direction parallel to the drum axis. This drum is used advantageously with the mast system described in application Ser. No. 246,112.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.