OrthoCor Medical, the Minneapolis-maker of a knee brace that provides relief from arthritis and joint pains, said it has secured $2.4 million in angel investment.

The company said it will use the money to market its products.

"…We are excited to meet the huge demand for our Active Knee System by expanding our sales efforts," CEO John Dinusson said in a statement.

OrthoCor sells a knee brace that provides heat and electromagnetic therapy to patients. The device is strapped around the knee and two small disposable "pods" snap into docking stations, delivering heat and activating the therapy.

The company has raised a total of $5 million in angel investment since it was founded in 2007.

The firm named Patrick Carroll as its national sales director. Carroll was eastern regional sales manager at medical device business Exos Corp.