Hydraulic transmission for a SMA engine used in an energy recovery device
US11162478B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2018 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Sep 18, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03G7/0636
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention provides an energy recovery method and system comprising a first Shape-Memory Alloy (SMA) or Negative Thermal Expansion (NTE) core and adapted to convert movement of the core into energy in response to a change in temperature, and a fluid provides a temperature change to activate the first core, to generate a power stroke; and a back load is applied to the SMA core with a force higher than a maximum relaxation force of the SMA core. The advantage of the invention is to be able to allow a multistage variable loading regime on an SMA engine to increase the system efficiency. The invention provides a method of transferring large reciprocating forces into a steady rotary motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.