US 12,448,964 B2Granted

Metering distribution assembly and coating system comprising the same

AssigneeNordson Corporation

InventorsPeter Qiu, William Zheng

Life of this patent

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Abstract

A metering distribution assembly and a coating system. The metering distribution assembly includes a volumetric cavity pump that comprises a flow passage plate having flow passages, a nozzle plate with a flow passage, a gear fixing plate attached between the flow passage plate and the nozzle plate, and a gear set located in an aperture of the fixing plate. The gear set has a fluid inlet and a fluid outlet on a side of the gear set opposite to the fluid inlet. The fluid inlet is in fluid communication with the flow passages of the flow passage plate, and the fluid outlet is in fluid communication with the flow passage of the nozzle plate. A part of the flow passages of the flow passage plate, which is in direct fluid communication with the fluid inlet, extends in a direction parallel to a rotation axis of the gear set.

Claims20

Dependent claims

A metering distribution assembly composed of a volumetric cavity pump comprising:

a flow passage plate provided with flow passages for fluid flow;
a nozzle plate provided with a flow passage through the nozzle plate;
a gear fixing plate attached between the flow passage plate and the nozzle plate and having an aperture;
and
a gear set located in the aperture of the gear fixing plate, the gear set having a fluid inlet and a fluid outlet on a side of the gear set opposite to the fluid inlet, the fluid inlet being in fluid communication with the flow passages of the flow passage plate, and the fluid outlet being in fluid communication with the flow passage of the nozzle plate;
and
a nozzle coupled to the nozzle plate or coupled to a control valve assembly that is coupled to the nozzle plate,
wherein a part of the flow passages of the flow passage plate, which is in direct fluid communication with the fluid inlet, extends in a direction parallel to a rotation axis of the gear set,
wherein the flow passage plate has a first flow passage, a second flow passage and a third flow passage, the first flow passage receiving a fluid from outside, the second flow passage fluidly communicating the first flow passage and the third flow passage, and the third flow passage being in direct fluid communication with the fluid inlet, and
wherein a first end, of the third flow passage, is offset from the gear fixing plate and is configured to receive the fluid flow from the second flow passage and configured to direct the fluid flow to a second end of the third flow passage, wherein the second end is configured to direct the fluid flow directly to the fluid inlet of the gear set in the direction that is parallel to the rotation axis of the gear set.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/040,993Filed 11 Aug 2021
Priority: CN 202010806091.312 Aug 2020
Published: US 2023/0286012 A114 Sep 2023
Granted: 21 Oct 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

B05C 5/0212
For applying liquid or other fluent material to separate articles: only at particular parts of the articles
F04C 2/084
Details specially related to intermeshing engagement type machines or pumps: toothed wheels
B05C 5/0237
Characterised by flow controlling means, e.g. valves, located proximate the outlet: fluid actuated valves
F04C 2/18
With toothed rotary pistons: with similar tooth forms