Boulder County Business Report

February 3, 2006

 

 

 

 

 

Prosthetic foot promises greater mobility, less fatigue

 

 

by S. Clayton Moore

 

 

 

 

 

 

LOUISVILLE - Entrepreneur Jerry Rifkin is putting his best foot forward. It's made out of titanium plate, aircraft aluminum and steel-fiber rope..

The University of Colorado graduate student has formed a new company, Tensegrity Prosthetics Inc. in Louisville, to market his innovative prosthetic foot, which is designed to improve the mobility of amputees

The product was inspired by a bike accident. Rifkin had already gotten a degree in biomedical engineering from the University of Florida and was living in Colorado when he broke his leg in a bike accident. While learning to walk again, he became fascinated with the concept of prosthetics.

"I realized that there were important things going on in the human foot that hadn't been taught to me in school," Rifkin said. "I took the time to start figuring out what was going on there and recreate it."

He already was working on it when he enrolled as a graduate student in mechanical engineering at CU, which gives him access to both expertise and equipment.

Last year, Rifkin managed to land a Small Business Innovation Research grant from the National Institutes of Health, securing $100,000 a year for two years for research.

"The competition is fierce," Rifkin said. "It was a real challenge to learn the proper tone to take. You can't afford to talk over their heads, but you don't know what they know. It was a real compromise."

He is already testing two working prototypes at the locomotion laboratory run by Rodger Kram, an associate professor of CU's Department of Integrative Physiology. The foot is made from a combination of high-strength materials and uses steel cables to define its range of motion and support the weight of its user.

"It's a lot stronger by weight than you could get with a traditional design," Rifkin said. "It is a universal foot appropriate for walking as well as hiking, but still light enough to use around town. It can absorb irregularities in terrain without becoming unstable, yet it provides the sensation of being firmly in contact with the ground. That's one of the most important factors to amputees."

The product is an innovative solution for active amputees, and its development is happening at an opportune time when many veterans are returning from Iraq to the U.S. in need of such prosthetic devices.

"The self-image of amputees has changed," Kram said. "It used to be that people who underwent amputation were happy just to be able to walk. Today they want to be doing exactly what they were doing before their amputation.

The goal of Jerry's device is to give people back complete mobility so that they can hike in the flatirons, climb or do anything else they did before."

The product also combats the draining effort required by traditional prosthetic feet. "What I'm working for is less fatigue so that amputees can walk as quickly and for the same distance as their friends can walk," Rifkin explained. "That's a big deal because it's a barrier between people that just shouldn't be there. There should be a better way, and I think I've found it."

Rifkin also worked rigorously to file protection for his intellectual property through the U.S. Patent Office last year. He and his colleagues plan to begin human research trials on amputees by this spring to validate his preproduction prototypes. The company will subsequently produce up to 200 production models to sell to 20 or more prosthetists around the Front Range during its initial rollout. It will sell initially for $1,300.

Rifkin also is applying to the NIH for funding of the second phase of product development, which could net him $400,000 per year for three years. To support production, he will seek around $200,000 in venture capital during the next year. Assuming he can secure a major customer in the prosthetics industry, he projects the company will earn $1.4 million by its second year in production and up to $25 million by year five.

"If I can secure the funding, I should be able to run the business well enough to be profitable by year two," he said.

The business plan for Tensegrity Prosthetics was developed at the university as part of its annual business plan competition conducted by instructor Frank Moyes. Rifkin came in fourth in the competition, but he gained the support of competition judge David Spiro, founder of the FBN Group Inc., a strategic marketing group based in Boulder.

"I was convinced the foot was real, and that he had a good plan to take it to market," said Spiro, who has been mentoring Rifkin. "It really impressed me that he was so passionate about it, and I wanted to help him succeed with the idea."

The product received further praise when it won the Best New Industrial Product Award at the Colorado Inventors Showcase in November 2005.

"A prosthetic foot doesn't sound that intriguing, but Jerry had devised a brilliant scheme for demonstrating it," recalled Tom Frey executive director of the DaVinci Institute, a Louisville-based think tank that sponsored the event. "I think if there's anyone that call pull off this business, it's Jerry Rifkin. He has unusually good insights and really has all the markings of a successful entrepreneur."