Counterweight for an elevator, ballast weights for this counterweight and elevator equipped therewith
US7387192B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2004 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Jun 11, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B17/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The counterweight according to the invention for an elevator with a frame (1) comprising two vertical U-shaped posts (3) parallel and opposed to each other and connected to each other by at least one upper cross-beam (5) and one lower cross-beam (7), wherein the wings of the vertical posts accommodate flat ballast weights forming a mass and piled up on each other in the frame (1), is characterized in that the upper ballast weights (11′a, 11′b), at least those located at a higher height than that of the conventional tilted assembly of the lower one-piece ballast weights (11′), comprise at least two parts interlocked with each other so that they can be successively assembled by interlocking them in a plane and in rows between the two posts (3), said interlocking providing a good lateral stiffness to avoid the lateral escape of said two interlocked ballast weight parts (11′a and 11′b) out of said frame (1) during counterweight displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.