Cylindrical magnetic coupling with alternating polarity | Available Intellectual Property | Rensselaer Polytechnic Institute

Cylindrical magnetic coupling with alternating polarity

RPI ID: 2018-065-201

Innovation Summary:
This invention, developed by RPI creator Ethan Craig Brown, introduces a cylindrical magnetic coupling system that uses alternating magnetic polarity to enhance torque transfer and alignment stability. The design features a piston and drive assembly, each embedded with magnets arranged along a longitudinal axis. Critically, the polarity of each magnet alternates relative to its neighbors, creating a balanced and efficient magnetic field. This configuration improves coupling strength and reduces axial misalignment, making it ideal for applications in fluid pumps, sealed actuators, and precision motion systems.

Challenges / Opportunities:
Traditional magnetic couplings often suffer from torque limitations, axial instability, or complex assembly requirements. This invention addresses those issues by leveraging a simple yet powerful alternating polarity configuration that enhances magnetic interaction without increasing system complexity. It opens opportunities in industries requiring non-contact torque transmission, especially where mechanical seals are undesirable or infeasible.

Key Benefits / Advantages:
✔ Enhanced torque transfer through alternating polarity alignment
✔ Improved axial and radial stability
✔ Non-contact operation reduces wear and maintenance
✔ Compact and scalable cylindrical design
✔ Suitable for sealed or sterile environments

Applications:
• Magnetically coupled piston pumps
• Sealed actuators and valves
• Biomedical and pharmaceutical fluid systems
• Robotics and automation
• Hazardous or sterile process environments

Keywords:
#Magneticcoupling #alternatingpolarity #pistonpump #noncontacttorquetransfer #cylindricalmagnetarray #sealedactuator

Intellectual Property:
US Issued Patent 11,499,536 B2
Patent Information:
Inventors:
Ethan Brown
Keywords:
magnetically-coupled
piston
For Information, Contact:
Natasha Sanford
Licensing Associate
Rensselaer Polytechnic Institute
sanfon@rpi.edu