Descent control device
US9016432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2012 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jul 11, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/586
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A descent control device for controlling rotational motion of an object includes: at least one drive assembly for rotationally engaging the rotating object; a first substantially planar ferromagnetic moving element in rotationally locked engagement with at least one drive assembly and comprising at least one recess formed in a surface thereof having at least one magnet fixedly disposed therein; a second substantially planar ferromagnetic moving element in rotationally locked engagement with at least one drive assembly, and comprising at least one recess formed in a surface thereof having at least one magnet fixedly disposed therein; and at least one conducting plate disposed proximate the first and second moving elements. A magnetic field may be induced by rotational movement of the first or second moving element relative to at least one conducting plate in a direction to oppose acceleration of at least one drive assembly as it rotationally engages the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.