US 12,078,171 B2
Screw assembly for a triple screw pump and triple screw pump comprising said assembly
Manuele Rossi, Ponte dell'Olio (IT)
Assigned to Settima Meccanica S.r.l., Milan (IT)
Appl. No. 18/278,352
Filed by Settima Meccanica S.r.l., Milan (IT)
PCT Filed Dec. 28, 2021, PCT No. PCT/EP2021/087714
§ 371(c)(1), (2) Date Aug. 22, 2023,
PCT Pub. No. WO2022/179746, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 102021000004148 (IT), filed on Feb. 23, 2021.
Prior Publication US 2024/0125322 A1, Apr. 18, 2024
Int. Cl. F04C 2/16 (2006.01); F04C 2/08 (2006.01); F04C 18/16 (2006.01)
CPC F04C 2/165 (2013.01) [F04C 2/084 (2013.01); F04C 18/16 (2013.01); F04C 18/165 (2013.01); F04C 2240/20 (2013.01); F05B 2240/30 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A screw assembly for a triple screw pump, comprising:
a central screw and two lateral screws, all of the screws being provided with one or more helicoidal threads, each lateral screw being arranged to mesh with said central screw, and a lateral screw axis of at least one of the two lateral screws being parallel to a central screw axis,
wherein a distance between the central screw axis and the lateral screw axis is greater than 1/2 and lower than 3/5 of a central screw external diameter, the distance being transverse to the respective central screw axis and the lateral screw axis.