Double-helical gear rotary positive displacement pump
AssigneeSettima Meccanica S.r.l.
InventorMario Antonio Morselli
Life of this patent
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Abstract
The invention relates to a double-helical gear rotary positive displacement pump comprising a pump housing (14) rotatably supporting at least a driving shaft (2) and at least a driven shaft (3), at least a first toothing (4) and a second toothing (5) being associated to said driving shaft (2) and at least a third toothing (6) and a fourth toothing (7) being associated to said driven shaft (2). The toothings (4, 5, 6, 7) have individually a helical profile that allows their mutual herringbone meshing. Three of toothings (4, 5, 6) are rigidly connected to their respective shafts (2, 3): the fourth toothing (7), or other suitable one, is idle on the shaft and axially constrained.
Claims10
A double-helical gear rotary positive displacement pump comprising a main pump housing rotatably supporting at least a driving shaft and at least a driven rotary element, said driving shaft being associated to at least a first double-helical toothing and said driven rotary element being associated to at least a second double-helical toothing meshing the first double-helical toothing wherein one of the four helical toothing portions constituting the two double-helical toothings, is idle with respect to the helical toothing portion to which it results side by side.
Dependencies are inferred from the claim text.