JP-2026514235-A - Actively checked multi-display assembly

Abstract

A multi-displacer assembly includes multiple fluid displacers driven in phase with respect to each other. The assembly includes multiple pumps, each pumping fluid downstream from the multi-displacer assembly. The fluid displacers of the pumps reciprocate to pump fluid while checking the flow of fluid to the other pumps among the multiple pumps. [Selection Diagram] Figure 5A

Inventors

• クラファーク， アンドリュー， ジェイ

Assignees

• グラコ ミネソタ インコーポレーテッド

Dates

Publication Date

20260507

Application Date

20240430

Priority Date

20230503

Claims (20)

1. A multi-display support pumping assembly, A first pump comprising a first fluid displacer configured to reciprocate along a first pump shaft within a first displacer cavity for pumping fluid through a first pumping chamber, A second pump comprising a second fluid displacer configured to reciprocate along a second pump shaft within a second displacer cavity for pumping fluid through a second pumping chamber, Equipped with, A multi-displacer pumping assembly wherein the first pumping chamber is fluidly connected to the second displacer cavity to receive fluid from the second displacer cavity and to output fluid to the second displacer cavity.
2. The multi-displacer pumping assembly according to claim 1, wherein the second fluid displacer is configured to fluidly connect the first pumping chamber alternately to the inflow passage so that the first pumping chamber receives the fluid from the inflow passage, and to the outflow passage so that the first pumping chamber outputs the fluid to the outflow passage.
3. The multidisplacer pumping assembly according to claim 2, wherein the second pumping chamber is alternately fluidically connected to the inlet passage for receiving the fluid from the inlet passage and to the fluid passage for outputting the fluid to the outlet passage.
4. The second displacer cavity includes the second pumping chamber, a first flow chamber fluidly connected to the inflow passage, a second flow chamber fluidly connected to the outflow passage, and a common chamber. The first pumping chamber is fluidly connected to the common chamber. The second fluid displacer fluidly connects the first flow chamber and the common chamber in order to connect the first pumping chamber to the inflow passage. The second fluid displacer fluidly connects the second flow chamber and the common chamber in order to connect the first pumping chamber to the outflow passage. The multi-display pumping assembly according to claim 1.
5. The multi-display pumping assembly according to claim 4, wherein the common chamber is positioned axially between the first flow chamber and the second flow chamber.
6. The multi-displacer pumping assembly according to claim 4 or 5, wherein the second fluid displacer is configured to fluidly isolate the first flow chamber from the common chamber before fluidly connecting the second flow chamber to the common chamber.
7. The multi-displacer pumping assembly according to claim 4 or 5, wherein the second fluid displacer is configured to fluidly isolate the second flow chamber from the common chamber before fluidly connecting the first flow chamber to the common chamber.
8. The multi-displacer pumping assembly according to claim 4 or 5, wherein a common passage extends between the first pumping chamber and the common chamber to fluidly connect the first pumping chamber and the common chamber.
9. The multi-display pumping assembly according to claim 8, wherein the common passage comprises a first branching path and a second branching path.
10. A first check valve is arranged in the first branch path, A second check valve is located in the second branch path, The multi-display pumping assembly according to claim 9, further comprising:
11. The multi-displacer pumping assembly according to any one of claims 1 to 5, wherein the second fluid displacer is elongated along the second reciprocating axis.
12. The multi-displacer pumping assembly according to claim 1, wherein the second fluid displacer includes a chamber connector formed on or within the second fluid displacer, the chamber connector being configured to alternately connect the first pumping chamber to an inlet path and an outlet path.
13. The multi-displacer pumping assembly according to claim 12, wherein the chamber connector is formed as an undercut on the outside of the second fluid displacer.
14. The multi-displacer pumping assembly according to claim 13, wherein the undercut extends completely circumferentially around the second fluid displacer.
15. The second pump described above is A first routing seal that defines at least partially the first fluid chamber within the second displacement cavity, A second routing seal that defines at least partially a second fluid chamber within the second displacement cavity, Furthermore, The second fluid displacer engages with the first routing seal and, apart from the second routing seal, fluidly connects the second routing chamber and the first pumping chamber. The second fluid displacer engages with the second routing seal and fluidly connects the first routing chamber and the first pumping chamber, away from the first routing seal. A multi-display pumping assembly according to any one of claims 12 to 14.
16. The multi-displacer pumping assembly according to claim 15, wherein a common chamber is formed between the first routing seal and the second routing seal, and the common chamber is fluidly connected to the first pumping chamber, with the second fluid displacer engaged with the first routing seal and the second fluid displacer engaged with the second routing seal.
17. The third pump further comprises a third fluid displacer configured to reciprocate along a third pump shaft within a third displacer cavity for pumping fluid through a third pumping chamber. The second pumping chamber is fluidly connected to the third displacement cavity in order to receive fluid from the third displacement cavity and output fluid to the third displacement cavity. A multi-display pumping assembly according to any one of claims 1 to 5.
18. The fourth pump further comprises a fourth fluid displacer configured to reciprocate along a fourth pump shaft within a fourth displacer cavity for pumping fluid through a fourth pumping chamber. The third pumping chamber is fluidly connected to the fourth displacement cavity in order to receive fluid from the fourth displacement cavity and output fluid to the fourth displacement cavity. The multi-display pumping assembly according to claim 17.
19. The multi-displacer pumping assembly according to claim 18, wherein the fourth pumping chamber is fluidly connected to the first displacer cavity to receive fluid from the first displacer cavity and to output fluid to the first displacer cavity.
20. The multi-displacer pumping assembly according to any one of claims 1 to 5, wherein the first displacer cavity is formed within the first pump body, the second displacer cavity is formed within the second pump body, and the first pump body is fixed to the second pump body.

Description

(Cross-reference of related applications) This application claims priority to U.S. Provisional Application No. 63/463,715, “Actively Checked Multi-Piston Pump,” filed on 3 May 2023, and to U.S. Provisional Application No. 63/626,707, “Actively Checked Multi-Displacer Assembly,” filed on 30 January 2024, the disclosures of which are incorporated herein by reference in their entirety. (Technical field) This disclosure relates to pumping. More specifically, this disclosure relates to multi-displacer pumps. A multi-piston pump contains multiple pistons that cooperate to output a fluid flow from the pump. The pistons are driven in phase with respect to each other. In such a pump, a ball check is used to prevent the fluid from returning to the piston cavity. The ball check uses a spring to push (bias) the ball back onto the ball seat. The ball check functions in relation to the fluid pressure, and as the piston's downstroke generates fluid pressure, the ball disengages from the seat, allowing the fluid to pass towards the fluid outlet. At the end of the piston's downstroke, when the outflow fluid pressure becomes small compared to the force applied by the ball check spring, the ball returns to the seat so that the piston chamber can be refilled. According to one aspect of this disclosure, a multi-displacer pumping assembly includes first and second pumps. The first pump includes a first fluid displacer configured to reciprocate along a first pump axis within a first displacer cavity for pumping fluid through a first pumping chamber. The second pump includes a second fluid displacer configured to reciprocate along a second pump axis within a second displacer cavity for pumping fluid through a second pumping chamber. The first pumping chamber is fluidically connected to the second displacer cavity to receive fluid from the second displacer cavity and output fluid to the second displacer cavity. In addition to or alternative aspects of the present disclosure, a multi-displacer pumping assembly includes: a first pump having a first fluid displacer configured to reciprocate along a first pump axis within a first displacer cavity for pumping fluid through a first pumping chamber; a second pump having a second fluid displacer configured to reciprocate along a second pump axis within a second displacer cavity for pumping fluid through a second pumping chamber; a first fluid chamber formed within the second displacer cavity; a second fluid chamber formed within the second displacer cavity; a common chamber formed within the second displacer cavity; a common passage extending between the first pumping chamber and the common chamber and fluidly connecting them; an inlet passage fluidly connected to the first fluid chamber for supplying fluid to the first fluid chamber; and an outlet passage fluidly connected to the second fluid chamber for supplying fluid to the second fluid chamber. The second fluid displacer is configured to fluidically connect the first pump alternately to the first fluid chamber for receiving fluid flowing into the first pumping chamber, and to the second fluid chamber for outputting fluid. According to another additional or alternative aspect of this disclosure, a pumping method includes: reciprocating a first fluid displacer on a first pump shaft to pump fluid from an inflow passage to an outflow passage through a first pumping chamber; reciprocating a second fluid displacer on a second pump shaft to pump fluid from an inflow passage to an outflow passage through a second pumping chamber; fluidically connecting the first pumping chamber to the inflow passage by the second fluid displacer during the filling stroke of the first fluid displacer; and fluidically connecting the first pumping chamber to the outflow passage by the second fluid displacer during the discharge stroke of the first fluid displacer. According to yet another additional or alternative aspect of this disclosure, a multi-displacer pumping assembly includes: a first fluid displacer configured to reciprocate along a first axis within a first displacer cavity for pumping fluid through a first pumping chamber; and a second reciprocating body configured to reciprocate along a second axis within a second displacer cavity to alternately fluidically connect the first pumping chamber to an inflow passage so that the first pumping chamber receives fluid from an inflow passage, and to an outflow passage so that the first pumping chamber outputs fluid to an outflow passage. This is a schematic diagram showing the flow path for a multi-display pumping assembly.This is an isometric view of a multi-display pumping assembly.This is a cross-sectional view along line A-A in Figure 2.This is a cross-sectional view along line B-B in Figure 2.This is a cross-sectional view along line C-C in Figure 2, showing the pump of a multi-display pumping assembly in a filled state.This is a cross-sectional view along line C-C in Figure 2, showing the pump of a multi