Closed loop granular jamming apparatus
US10881763B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2019 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Apr 30, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0817
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A closed loop granular jamming apparatus is disclosed including a three-dimensional membrane structure filled with granular material. Fluid is evacuated from the structure which induces a jamming effect, whereas the viscosity of the granular media increases with increasing particle density. The thin membrane conforms to the shape of the granular material. Decreasing enclosed volume and increasing packing density prevents particles from distributing within the confined space, inducing the aggregate to behave as a solid. In the jammed state, the apparatus is resistive to force and change of shape. The apparatus is returned to the unjammed state by releasing the vacuum. The size and shape of the apparatus may be repeatedly adjusted by alternating between the jammed and unjammed states. The closed loop granular jamming apparatus may include toroidal and cylindrical shapes with articulating inserts and compliant spines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.