Patent ID: 8973901
Filing Date: 2015-03-10
Classification: B66D

Abstract:
1. Double drum traction winch comprising a frame supporting a first and second rotatable drum such that a first wire or a second wire can be wound about the two drums, further comprising at least one drive for rotating both drums about their respective rotational axis, wherein a circumferential surface of each drum is provided with parallel circumferential grooves perpendicular to the rotational axis of the drum for engaging the first wire or the second wire which is wound about both drums, wherein the parallel circumferential grooves of each drum are subdivided in a first set of multiple parallel circumferential grooves designed for guiding the first wire and a second set of multiple parallel circumferential grooves designed for guiding the second wire, and wherein the rotational axis of the first drum is tilted relative to the rotational axis of the second drum such that a circumferential groove of the first set of multiple circumferential grooves on the second drum guides the first wire wound about both drums from a first guide groove of the first set of multiple circumferential grooves on the first drum to a second guide groove of the first set of multiple circumferential grooves on the first drum and a circumferential groove of the second set of multiple circumferential grooves on the second drum guides the second wire wound about both drums from a first guide groove of the second set of multiple circumferential grooves on the first drum to a second guide groove of the second set of multiple circumferential grooves on the first drum, wherein the grooves of the first set of multiple parallel circumferential grooves alternate with the grooves of the second set of multiple parallel circumferential grooves such that the circumferential surface of each drum is provided with multiple parallel circumferential grooves of both the first set and the second set, and wherein, for each drum, multiple parallel circumferential grooves of the first set of multiple parallel circumferential grooves are each interpositioned between two grooves of the second set of multiple parallel circumferential grooves, such that the traction winch is designed for cooperating with the first wire in the first set of multiple parallel circumferential grooves or with the second wire in the second set of multiple parallel circumferential grooves, and wherein the first wire differs from the second wire in type of material and/or cross section and/or maximum tensile strength.