Patent ID: 7465092
Filing Date: 2008-12-16
Classification: F16C

Abstract:
1. A ball chain, comprising: a longitudinal elongated spacing chain and a row of balls; said spacing chain further comprising a pair of parallel thin flexible strips longitudinally extended along with said spacing chain and a multitude of transverse flexible connecting beam linked to said thin flexible strips; the spacing chain being provided with a row of holes for receiving a corresponding one of the balls; a row of spacers interposed between each two adjacent balls for isolating said balls, said spacers having a connection with said flexible connecting beam, wherein the connection is constrict and at least smaller than the cross sectional area of said spacers; and wherein a joint area between the spacers and the transverse flexible connecting beam is formed with an elastic member for the joint of the said spacers and said connecting beam; the joint area is at least smaller than a diameter of the spacers so that the flexible deflection between the spacers and the transverse flexible connecting beam will be increased.