Composite handrails with reduced density carcass
US11975943B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2018 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Aug 23, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/732
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a handrail including a carcass, a stretch inhibitor within the carcass, and a sliding layer bonded to the carcass, at least a portion of the carcass has a gas phase dispersed in a solid polymer matrix. The gas phase can reduce a density of the carcass by at least 5% or 10%, or about 15%, as compared to a density of the polymer matrix. The carcass can have a generally uniform distribution of gas bubbles in the polymer matrix, which can define a generally closed cell structure in the polymer matrix. The gas phase can be formed of particles of a syntactic foam dispersed in the polymer matrix. The handrail can further include a cover. The carcass and the cover can be formed of thermoplastic materials, and the cover can represent between 10 and 30% of the overall TPU required for the handrail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.