Buffer device for elevator
US4515248A · kind A · utility
7Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/902
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A buffer device for an elevator employs, as a buffer member, a foamed plastic material such as polyurethane foam which undergoes very little permanent deformation upon receipt of an impact. The foamed plastic material is accommodated in a box made of a thin non-combustible material, and a heat-insulating material is disposed between the box and the buffer member in the box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.