Hydraulic elevator and control method thereof
US4775031A · kind A · utility
6Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/24
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hydraulic elevator, wherein actual speed characteristics are detected so that they can be used together with desired speed characteristics in such a manner that the speed control accuracy of the car itself is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.