Prosthetic elbow with adjustable counterbalance mechanism
US11246720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2019 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Mar 30, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/6836
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An adjustable counterbalance mechanism for a prosthetic elbow includes a torsional spring disposed in a housing structure coaxially to an axis of rotation of a forearm portion and a cord and pulley arrangement which includes a first pulley, a second pulley and a link member attached to a fixed member structure. The first pulley is attached to a second portion of the spring and connected to the second pulley by a first cord. The second pulley is pivotally attached to the housing structure and connected to the link member by a second cord. The cord and pulley arrangement is configured to transfer a moment of force due to spring force to the forearm portion to counteract the torque of a forearm due to gravity as the angle of the forearm portion changes relative to the upper arm portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.