Patent · US Active

Powered ankle-foot prosthesis

US11278433B2 · kind B2 · utility

6Cited by

319References

8Claims

0Family size

Assignee

Massachusetts Institute of Technology · US

Inventors

Hugh M. Herr · Somerville, US
Jeff Weber · San Francisco, US
Kwok Wai Samuel Au · Mountain View, US
Bruce Wayne Deffenbaugh · Honolulu, US
Lee Magnusson · San Francisco, US
Andreas Hofmann · North Bend, US
Benjamin B. Aisen · New York, US

Key dates

Filing date	Nov 6, 2018
Grant date	Mar 22, 2022
Priority date	—
Expiry date	Dec 3, 2039

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61F2002/7645
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A powered ankle-foot prosthesis, capable of providing human-like power at terminal stance that increase amputees metabolic walking economy compared to a conventional passive-elastic prosthesis. The powered prosthesis comprises a unidirectional spring, configured in parallel with a force-controllable actuator with series elasticity. The prosthesis is controlled to deliver the high mechanical power and net positive work observed in normal human walking.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.