Patent ID: 9173278
Filing Date: 2015-10-27
Classification: A61B,H05G

Abstract:
1. A gravity balance device for a cross arm of X-ray equipment, the gravity balance device is mounted within the cross arm for maintaining gravity balance of the cross arm, the gravity balance device comprising: a counter weight module configured to move along in a direction opposite, with respect to a center of rotation of the cross arm, to a moving direction of a tube of the X-ray equipment; a chain configured to impel the tube and the counter weight module to move; a first sprocket engaged with the chain; and a second sprocket engaged with the chain, wherein a part of the chain which is located at a side of the first sprocket and at a side of the second sprocket is configured to impel the counter weight module to move, and another part of the chain which is located at another side of the first sprocket and at another side of the second sprocket is configured to impel the tube to move.