Roll changing device for rolling mill
Patent 4435970 Issued on March 13, 1984. Estimated Expiration Date: 
June 10, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 10, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3208260 3376724 3451244 3491570 3842639 InventorAssigneeApplicationNo. 06/272283 filed on 06/10/1981US Classes:72/239, By means to replace tool72/238With replacement of toolExaminersPrimary: Larson, Lowell A.Attorney, Agent or FirmInternational ClassesB21B 31/10 (20060101)B21B 31/00 (20060101) B21B 13/00 (20060101) B21B 13/02 (20060101) Foreign Application Priority Data1980-06-18 JPAbstractA roll changing device for rolling mills, in which the roll are changed through roll exchange between the work roll changing rails and intermediate roll changing rails which are mounted in a housing, and delivery rails placed in front of the rolling mill. The improvement comprises a vertically movable floor device carrying the delivery rails. The vertically movable floor device is adapted to move vertically to bring the delivery roll into alignment with the work roll changing rails and the intermediate roll changing rails to permit an easy and prompt roll change without any restriction in the space, even when the work rolls and the intermediate rolls are mounted at large depths from the floor level. | |
