Patent ID: 7604640
Filing Date: 2009-10-20
Classification: A61B,B25B

Abstract:
1. A device for applying rotary impact comprising: a torsion spring defined by a diameter and width and having a first end and a second end; a body comprising a shaft assembly comprising: wherein rotation of the body about the shaft when the second end is in contact with a first contact section changes the torsion spring configuration to generate potential energy in the torsion spring, and wherein further rotation of the body about the shaft causes the second end to be in a non-contact section, wherein the torsion spring is configured to convert the generated potential energy into kinetic energy when the second end is in the non-contact section, causing the second end to transition across the non-contact section and contact a second contact section, wherein the contact with the second contact section converts the kinetic energy in the torsion spring to a rotary impact on the shaft.