US Patent 7322977 Spinal adjusting device and method

A spinal adjusting device having a base plate assembly with an upper plate assembly coupled thereto, the base plate assembly configured to permit the upper plate assembly to drop a predetermined distance when subjected to a predetermined force. The base plate assembly includes a coupling mechanism having a drop assembly that enables adjustment in the amount of predetermined force required to drop the upper plate assembly onto the base plate. A patient is placed with their neck supported at the vertebra adjacent to the vertebra in need of repositioning. The patient's cervical spine and skull are flexed or extended with sufficient force to cause the entire upper assembly to drop, facilitating repositioning of the target vertebrae.