Andrew H Hansen

US Patent:

20040153168, Aug 5, 2004

Filed:

Nov 3, 2003

Appl. No.:

10/700358

Inventors:

Dudley Childress - Wilmette IL, US
Michel Sam - Berkeley CA, US
Andrew Hansen - Round Lake IL, US
Margrit Meier - Chicago IL, US
Erick Knox - Naperville IL, US

International Classification:

A61F002/66

US Classification:

623/055000

Abstract:

Prosthetic foot is provided having at least one flexible sole element that is deflected under load during a gait cycle of a user of the foot and a plurality of constraining elements that constrain deflection of the at least one flexible sole element such that it assumes an appropriate roll-over shape during a gait cycle of the user. The constraining elements dictate the roll-over shape assumed by the flexible sole element, while the at least one flexible sole element stores and returns energy during the gait cycle of the user to promote a natural “feel” to the foot.

US Patent:

20130096694, Apr 18, 2013

Filed:

Jun 21, 2012

Appl. No.:

13/529833

Inventors:

Ryan J. Caldwell - Long Grove IL, US
Andrew H. Hansen - Apple Valley MN, US
Sean M. Wood - Gardena CA, US
Wei Chen - Glenview IL, US
Regan A. Radcliffe - Sunnyvale CA, US
Kevin A. Yngve - Evanston IL, US
Bennett E. Kuhar - Concord Twp. OH, US
Andrew J. Nelson - Chicago IL, US
Eric Nickel - Brooklyn Park MN, US

Assignee:

NORTHWESTERN UNIVERSITY - Evanston IL

International Classification:

A61F 2/80

US Classification:

623 34

Abstract:

Pump systems for use in suspension of a prosthetic device from a residual limb and methods of suspending a prosthetic device from a residual limb are disclosed. The pump systems include a mechanically activated pump having a first compression member coupled to a second compression member, a compressible bladder disposed between the first and second compression members, and coupling elements that engage and couple together the first and second compression members. The mechanically activated pump may be connected with an electrically activated pump within a fluid circuit of a hybrid pump system to provide vacuum engagement between a prosthetic device and a residual limb.