Our Story

"Necessity is the Mother of Invention"

How it began

"turn your scars into stars and your trials into triumphs "

Larry Bohanan, who is the inventor of the Quadriciser, was born and raised in Knoxville, Tennessee, and worked 28 years at the Oak Ridge National Laboratory and the Y-12 National Security Complex. During his time there, he helped top scientists and engineers with their patents and inventions. Life was treating Larry well until tragedy struck his family. His father, Wallace, had several mini strokes and one massive stroke. Already a diabetic, Wallace was left immobile, in turn decreasing circulation that presented new problems. The doctor advised amputation of Wallace’s leg was necessary in seven days because of gangrene. Wallace needed movement and circulation. Larry tried physically to exercise his father, but it was impossible; his father was very spastic and stiff. This led Larry to create a motorized machine designed like a robot, to move all four limbs in a walking motion. After using the machine, Wallace opened his eyes for the first time in two days, and the new device facilitated much needed circulation. Later, Larry’s cousin Colin, who broke his neck on a motorcycle, was left paralyzed 11 years and unable to move a finger. Colin requested to use the new invention. After nine days of using this machine, the wind blew Colin’s hat off of his head, and he caught it with his hands. That was the first time he had moved like that in 11 years. These personal trials became triumphs because of the Quadriciser’s beginning in 1996.

Larry's Father

The very first Quadriciser ever invented.

Larry's Cousin

The second Quadriciser ever invented.

About Quadricisers

Our Current Product

The Quadriciser is a medical device that helps individuals with minimum to severe disabilities receive rehabilitative therapy by moving all four limbs simultaneously in a natural motion with high repetitions to help reconnect nerve pathways in the brain. The Quadriciser is a motorized machine equipped with a timer, speed control, grip assist gloves, foot cradles, adjustment bar, adjustable trapeze cords, gait wedge, and a reverse function. The bars at the top allow for multiple ranges of motion in the arms. The foot cradles are designed to give a natural walking motion while increasing flexion in the foot with specialized wedges that increase or decrease flexion. The Quadriciser is the only in home physical therapy tool that allows multiple of ranges of motion in the arms while providing mass practice. Praised for gentle therapy, the Quadriciser team has spent years working with the medical community to develop the ultimate physical therapy device. View the diagram to see an image of the Adult Quadriciser Unit to learn more about Quadriciser features offered.


Larry & Patsy Bohanan

    Larry Bohanan is a man of many talents and tricks— magician, trick water skier, industrial designer, inventor, business owner, Christian, prayer warrior, prison ministry leader, faithful husband, father, and great grandfather. At 80, Larry is still going strong and shows no signs of slowing down.

     By the world’s standards, Larry has lived a full life. Yet none of this would be possible if it were not for the Lord and one very special lady, Patsy. Larry and Patsy are the salt of the earth. Like PB&J, you can’t have one without the other. They’ve been attached at the hip since high school, married for 58 years, and in business together for 27 years. That kind of track record is a testament to God’s grace and their commitment to keep faith, hope, and love alive through the good and bad times.

     Still, in many ways, their lives are not much different than any of ours. In the early years of their marriage, Larry had a great job and a secure future by all accounts. Then, tragedy struck his family, and Larry got to work…quite literally. Motivated again by faith, hope, and love, Larry came out of early retirement at 52 and put his creative talents to use in building a robotic machine that saved his father’s life. Since then, Larry’s invention received a name, Quadriciser, and a reputation of making what seems to be impossible possible. Countless individuals with disabilities – men and women of all ages  have been moved to once unreachable capabilities by the Quadriciser.

Givng Back

Eskimo Escapades

Remember earlier when we said Larry was a trick water skier? Check out the video to see how Larry uses his talents to give back to the community.