Winch and winch drum
US6435480B1 · kind B1 · utility
6Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Feb 22, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D1/7494
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Rope-holding characteristics of a winch drum (2) are determined by a staggered array of pyramidal protuberances (12, 14, 17, 19) on its surface. The staggering is such that there is no true circular path round the drum within the array, and a rope wound on it in the hoop direction is deflected sinusoidally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.