Hydraulic cushionride elevator
US5195614A · kind A · utility
1Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Sep 23, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B9/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mechanism is placed between a plunger and an elevator car to damp the effects of stick-slip encountered during elevator start-up and to minimize the probability of damage to a plunger/cylinder assembly if the elevator car is stopped in an emergency. The mechanism comprises a self-leveling hydraulic shock absorber that operates independently of any stick-slip between the plunger and cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.