Agilent Technologies has patented a magnetic coupling assembly for a pump, utilizing repulsive and attractive forces between magnets to drive rotation. The design includes a hermetically sealed casing with an insulating boundary to prevent gas permeation. This innovation allows for contactless coupling of a motor shaft to a pump shaft. GlobalData’s report on Agilent Technologies gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Agilent Technologies, Microfluidics automation was a key innovation area identified from patents. Agilent Technologies's grant share as of May 2024 was 41%. Grant share is based on the ratio of number of grants to total number of patents.
Contactless magnetic coupling pump assembly
A newly granted patent (Publication Number: US12015320B2) discloses a pump assembly featuring a magnetic coupling assembly that includes a drive shaft, a driven shaft, and a drive magnet assembly with balancing magnets. The assembly is designed to generate an axial attractive force between the drive and driven magnets, while the balancing magnets counterbalance this force. The pump head includes a pumping stage driven by the rotation of the pump rotor, which is connected to the driven shaft via the magnetic coupling assembly. A structural boundary made of an electrically insulating material prevents gas permeation through the assembly, ensuring efficient fluid pumping. The casing enclosing the driven magnet assembly forms a hermetic barrier, isolating the components from the external environment.
Furthermore, the patent details various configurations of the drive and driven magnets, including arrangements with alternating polarities and Halbach arrays. The pump rotor can consist of different components such as rotary vanes, cranks, cams, gears, screws, Roots rotors, or claws. In a specific embodiment, the pumping stage features an orbiting scroll blade that moves relative to a stationary scroll blade to create pockets for fluid pumping. The method for operating the pump assembly involves rotating the drive magnet assembly to drive the driven magnet assembly and counterbalancing the axial forces between the balancing magnets. The method also includes different configurations of drive and driven magnet assemblies, emphasizing the versatility and adaptability of the pump assembly design.
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