Single lock external fixation clamp arrangement and method

摘要

A clamping device for an external fixation system includes a post component having a yaw axis, a first clamp secured to the post component and rotatable about the yaw axis, and a second clamp secured to the post component and rotatable about the yaw axis relative to the first clamp. The device includes a tightening component configured in a manner that an action of tightening the tightening component simultaneously locks both the first and second clamps in a gripping arrangement and substantially eliminates their relative rotation about the yaw axis. Interdigitating components can be spaced apart by high spring rate biasing elements that so as to allow for smooth adjustment of the clamping device components relative to each other until the appropriate position is achieved and until after a sufficiently high clamping load has been applied.

主权项

1. A clamping device for an external fixation system, comprising:
a post component having a yaw axis; a first clamp secured adjacent to a first end of the post component and rotatable about the yaw axis; a second clamp secured adjacent to a second end of the post component and rotatable about the yaw axis relative to the first clamp; an intervening member secured to the post component and disposed between and separating the first clamp and the second clamp; and a tightening assembly associated with the first clamp, wherein the tightening assembly comprises:
a spherical washer received in a depression in an outer surface of the first clamp;a tightening component threadably engaging the first end of the post component adjacent the first clamp;a biasing element disposed between the spherical washer and the tightening component,wherein an action of tightening the tightening component simultaneously locks both the first and second clamps and locks their rotation about the yaw axis.