Spring useful for elevator safety device
US10927915B2 · kind B2 · utility
0Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2017 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Jan 18, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2234/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An illustrative example spring includes a curved shape body having a length. The body includes a cavity that extends along at least a majority of the length. The body has a cross-section across the length that is different at a plurality of locations on the body along the length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.