Multiple drum winches
AssigneeHicks Transmissions Limited
InventorRaymond J. Hicks
Life of this patent
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Abstract
A multiple drum winch is driven by epicyclic differential gearing. One drum (1) rotates with the planet carrier (29, 55) and another drum (2) rotates with the annulus (35, 59) to which it is directly geared, the input being to the sun (27, 53), possibly via reduction gearing (50, 51). The epicyclic can be housed within one of the drums (1). The gear ratios are selectable to achieve a balance between the power requirements of the drums. The drums are journalled only at intermediate zones (22, 23) spanning the centroid of the expected load.
Claims7
A multiple drum winch comprising a base, two parallel drums carried side by side on the base for entrainment by a common cable, an input shaft, a sun gear on the input shaft co-axial with the first drum, planet pinions carried by the first drum meshing with the sun gear, an internally toothed annulus mounted co-axially with the first drum and meshing with the planet pinions, and a positive transmission between the second drum and said annulus.
Dependencies are inferred from the claim text.