Bal Seal Engineering’s springs, seals, and contacts help improve the performance and reliability of powered surgical tools, orthopedic implants, pumps, monitors, active implantables, and other critical medical equipment. Our custom-engineered products enable designers to achieve higher speeds, longer service life, and more functionality in less space.
Products for Medical
Bal Conn® Electrical Contact
Our Bal Conn® electrical contact is the solution of choice for designers seeking to ensure consistent connection in implantable devices used to deliver neuromodulation and cardiac therapies. Due to its redundant contact points, the Bal Conn offers very low contact resistance. Its canted coils provide excellent resistance to fatigue and more design flexibility than any other implantable device interconnect technology.
- Implantable, precision-machined metal housings
- Low-force, low-resistance spring contact elements
- Redundant contact points for reliable connectivity
- Miniature contact diameters ( .9mm and smaller)
Bal Seal® Spring Energized Seal
Our seals are precision-machined from PTFE and other premium polymers, and they’re engineered to deliver longer service life and more equipment uptime. Their spring energizers ensure even, consistent wear, and their jacket materials can be customized to meet specific temperature, pressure, speed and chemical compatibility requirements.
- Controllable friction forces
- Excellent media and temperature resistance
- Wear-regulating spring energizer
- FDA compliant
SYGNUS® Implantable Contact System
The world’s first integrated seal and contact system for active implantable devices, SYGNUS® combines reliable Bal Conn® electrical contact technology with proven implantable-grade silicone isolation seals, resulting in a connector “stack” that can accommodate lead diameters down to 0.7 mm. The system’s contact element consists of a housing made from medical-grade MP35N® and a platinum-iridium or MP35N® Bal Spring® canted coil spring.
- Integrated contact/seal design
- Multi-point conductivity
- Smallest pitch in the industry (~2mm)
- FDA compliant
Bal Spring® Canted Coil Spring
Our spring mechanically fastens, conducts electricity, and shields sensitive electronics from EMI/RFI. Its independent coils, which serve as multiple contact points for optimal current carrying capability, ensure consistent, reliable connection—even under shock and vibration.
- Superior conductivity & power density
- Compact, space-saving profile
- Multifunctional for lighter, simpler designs
- FDA compliant
Medical Active Implantable Applications
Medical Tools & Equipment Applications
Medical Industry Achievements
Shaping CHM Standards
As members of the CTF, we helped to develop the cardiac IS-4 standard. We also contributed to IS-4 requirements for non-set screw connection systems.
When makers of the implantable alfapump® needed to boost battery life and guard against leakage, a Bal Seal® made it possible. Today, the device is helping ascites patients all over the world live more comfortably.
Making More Connections
Neuromodulation devices have been shrinking as demand for functionality grows. Our Bal Conn®, with its reduced axial pitch and sizes down to .020 in., lets designers build smaller devices that do more.
Medical Customer Successes
“With the addition of a Bal Seal® to our alfapump® design, we were able to reduce power consumption by 40% and extend battery life by 20%.”
Thomas Degen, CTO
“In the Minuteman®, the Bal Spring® enabled us to precisely control force when deploying the extension plates to lock and unlock the plunger.”
Douglas Snell, Engineering Director
“We considered flexure springs, screws, O-rings, and magnets. Ultimately, the Bal Spring® canted coil spring provided the functionality we needed.”
Bo Gao, Ph.D., R&D Manager, Knees
Material Data Sheet
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