Hydraulic elevator system and method
US10017358B2 · kind B2 · utility
0Cited by
15References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2014 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Oct 4, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B50/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hydraulic elevator system is operable to selectively raise and lower an elevator car. The system raises and lowers the elevator car by actuating a hydraulic jack. The system retracts a hydraulic jack that is fixed to an upper portion of the hoistway by pressurizing hydraulic fluid within the hydraulic jack via a hydraulic fluid pump. When retracting the hydraulic jack the elevator car travels upward. An accumulator usable with the system is operable to store energy during the downward travel of the elevator car for later use during the upward travel of the elevator car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.