Lift drive device
US7328774B2 · kind B2 · utility
3Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2004 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Apr 12, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19828
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A lift drive comprising: a spiral drive element having an axis of rotation, a rack having teeth sized and shaped to be engaged by the spiral drive element, the rack having a longitudinal axis parallel to the axis of rotation, and a motor to rotate the spiral drive element, wherein upon the spiral drive element-rotating, one of the spiral drive element and the rack moves relative to the other along the longitudinal axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.