US 12,392,340 B2
Single-entry screw pump
David Johannes Blatt, Obernkirchen (DE)
Assigned to ITT Bornemann GmbH, Obernkirchen (DE)
Filed by ITT Bornemann GmbH, Obernkirchen (DE)
Filed on Apr. 30, 2024, as Appl. No. 18/651,519.
Claims priority of application No. 102023111408.5 (DE), filed on May 3, 2023.
Prior Publication US 2024/0369058 A1, Nov. 7, 2024
Int. Cl. F04C 2/16 (2006.01); F04C 2/08 (2006.01); F04C 15/00 (2006.01); F04C 15/06 (2006.01)
CPC F04C 2/16 (2013.01) [F04C 2/086 (2013.01); F04C 15/0088 (2013.01); F04C 15/06 (2013.01); F04C 2240/30 (2013.01); F04C 2240/50 (2013.01); F04C 2240/52 (2013.01); F04C 2250/10 (2013.01); F04C 2250/101 (2013.01); F04C 2250/102 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A single-entry screw pump comprising:
a housing comprising:
an inlet;
an outlet; and
a sleeve section comprising an inlet opening and an outlet opening; and
two or more spindles, wherein the two or more spindles are rotatably mounted in the housing between a first slide bearing and a second slide bearing, wherein the two or more spindles comprise screw threads on their outer circumference, wherein the screw threads are positioned within the sleeve section and engage with one another and convey a medium from the inlet to the outlet and along the first slide bearing and the second slide bearing to provide hydraulic equalization, wherein an end face of the first slide bearing is proximate to the inlet and an opposite end face of the first slide bearing is proximate to the outlet opening.
 
11. A single-entry screw pump comprising:
a housing comprising:
an inlet;
an outlet; and
a sleeve section comprising an inlet opening and an outlet opening; and
two or more spindles, wherein the two or more spindles are rotatably mounted in the housing between a first slide bearing and a second slide bearing, wherein the two or more spindles comprise screw threads on their outer circumference, wherein the screw threads are positioned within the sleeve section and engage with one another and convey a medium from the inlet to the outlet and along the first slide bearing and the second slide bearing to provide hydraulic equalization, wherein an end face of the second slide bearing is proximate to the inlet opening and an opposite end face of the second slide bearing is proximate to the outlet.