| 摘要 |
A tong arm assembly for carrying and moving a tong head arcuately between two horizontally spaced positions includes a housing having the tong head pivotally connected to one end; the other end of the housing being rotatably mounted to a fixed arm stud. A pair of levers located within the housing have their first ends pivotally connected to an extension of the stud and their second ends pivotally connected to the tong head. As the housing is arcuately moved, the levers maintain the tong head steady and in its proper orientation. |
