20140216901 | CONVEYING CHAIN - A conveying chain comprises a plurality of chain sets connected together, each chain set comprises a chain bush, inner plates and outer plates respectively disposed on both sides of the chain bush, and a pin member penetrating the chain bush and connecting the inner and the outer plates, wherein a plurality of openings are defined at intervals on a circumference of the chain bush. A through hole is communicated with an outside via the openings, so that dust or exterior impurities accumulated between the chain bush and the pin member can be outwardly discharged through the openings to prevent the accumulation of the dust or impurities from having an adverse influence on the transmission of the chain and to increase the smoothness of the chain operation and the use duration efficiently. | 08-07-2014 |