Project TitleHybrid Prosthetic Vacuum Pump for Transfemoral Amputees
Track Code2011-089
Short Description

Novel hybrid vacuum pump technology with benefits of mechanical and electrical pumps.

#medicaldevice #prosthetics #rehabilitation


A group of Northwestern researchers have designed and developed a novel hybrid vacuum pump technology to be used with transfemoral amputees. To date, there are mechanical and electrical pumps which help increase comfort by distributing weight more evenly and relieving pressure points on the residual limb. However, they have a number of disadvantages associated with them. For example, mechanical pumps require more time to evacuate and are uncomfortable on some users, and electrical pumps require charging on a wall outlet. This new design combines the benefits of both pumps while minimizing the disadvantages of the individual pump. The resulting system is not only quiet and compact but meets the standards of the military user who would like to return to active duty. The new pump lasts longer, and the design is unobtrusive.

TagsMEDICAL DEVICE: prosthetics/rehabilitation
Posted DateMar 8, 2013 11:44 AM


Andrew Nelson
Bennett Kuhar
Regan Radcliffe
Kevin Yngve
Sean Wood
Ryan Caldwell
Andrew Hanson
Wei Chen*
Stephania Fatone*


  • Vacuum pump system for transfemoral amputees


  • Quiet and compact
  • Unobtrusive vacuum pump
  • Long-lasting--Minimal recharging needs
  • Combination of electrical and mechanical pumps


IP Status

US patent issued No. 9,066,822; Pending 14/730,806; 14/730,816 

Contact Information

Dimitra Georganopoulou, PhD 

Invention Manager

(p) 847-467-3095