Staplers & surgical devices

Springs, stamping, and high-precision components designed for optimal surgical performance

Surgical staplers
Feature

Various components such as compression springs, wave springs, torsion springs, constant force springs, or stamping & bending parts power staplers and surgical devices

Feature

We specialize in Minimally Invasive Surgery (MIS) devices, including medical clips and ligating devices made from special materials such as Nitinol

Surgical devices Springs
STAPLERS & SURGICAL DEVICES

Powering surgical staplers

Surgical staplers close wounds and join tissue faster and more consistently than hand suturing externally for high-tension skin wounds, internally across a wide range of procedures. Inside, the mechanism is all metal working in sequence: a driver pushes each staple through the tissue and against an anvil, which bends the legs inward into the closed B-shape that holds it securely, while a feeder spring advances the stack and a kick-off spring ejects the formed staple cleanly so the instrument never jams. Forming a B-staple correctly can take around 100 psi at the anvil, so every spring and formed part has to deliver high, repeatable force in a very small space, on every firing, along the whole staple line.

Springs for Staplers
PRECISION

Parts for Minimally Invasive Surgery (MIS)

Surgical instruments use a wider range of springs than almost any other device, because the jobs differ so much: compression springs drive staples and clips efficiently in a tight envelope, wave springs deliver the same load in a shorter length to free up space, torsion springs return triggers and jaws, and constant-force springs give steady feed or return. Alongside them we form the stamped drivers, cams, feeders, jaws, and knife carriers that make up the working end.

For minimally invasive devices, we specialize in Nitinol: this nickel-titanium alloy is superelastic so that a part can pass through a narrow trocar or catheter and spring back to shape, and it has shape memory, so it can be set to deploy into a precise geometry at the site, which is what makes it ideal for medical clips and ligating devices.

PRODUCTS

Together, we make the perfect solution for your staplers & surgical devices

All of it is manufactured to ISO 13485 with clean-room packaging, machine-vision inspection, and full traceability, and we co-engineer with OEMs and CDMOs from prototype to serial production, including reusable instruments built to survive repeated sterilization.

Products
Compression springs
Wave springs
Constant force and power springs
Assemblies & power packs
Torsion springs
Tension springs
Stamping & bending
Contact springs

Frequently Asked Questions

What does the spring actually do in a surgical stapler?
Several springs work together. The firing and driver springs supply and control the force that pushes each staple through tissue and against the anvil, where its legs bend inward into the closed B-shape that holds the tissue. A feeder spring advances the staple stack one position at a time so a fresh staple is always ready, and a kick-off spring ejects the formed staple cleanly so the instrument does not jam or re-catch it. Because a properly formed B-staple can require on the order of 100 psi at the anvil, the springs and surrounding parts must deliver high, repeatable force in a very small space, every firing, across a whole staple line.
Which spring types do you use for staplers and surgical devices, and why so many?
Surgical instruments use a wider mix than most delivery devices because the jobs are so varied. Compression springs drive staples and clips and are prized for energy efficiency in a tight envelope. Wave springs deliver a similar load in a shorter axial length, which buys space in a crowded handle or end effector. Torsion springs return triggers, jaws, and articulation joints. Constant-force springs give steady return or feed force independent of position. RPK Medical selects and combines them against the instrument's force curve, stroke, and available space.
Do you make the stamped metal parts as well as the springs?
Yes. Much of a stapler's end effector is stamped and formed metal: staple drivers, pushers, cam surfaces, feeder elements, jaws, knife carriers, and articulation components. Progressive-die stamping is the most cost-effective route for high-volume, simpler geometries. Multislide (fourslide) forming shapes slit coil or wire from several directions at once, which suits the intricate multi-bend drivers, clips, and formed springs surgical instruments depend on, with less scrap and no carrier rails, and it feeds material along its grain direction, improving fatigue resistance in parts that carry high firing loads.
How do you control staple firing force and consistent staple formation?
Consistent B-staple formation depends on the force being right at each stage of the stroke, not just at the peak. Modern staplers use camming and staged driver mechanisms so the force ramps as the staple first penetrates tissue, then buckles its legs, then closes, and reducing the peak firing force makes the instrument easier and safer for the surgeon to actuate. That is a stamped-part and spring problem together: the driver, pusher, and cam surfaces must be formed to tight, repeatable geometry, and the spring must deliver the same energy every time. RPK Medical holds those tolerances and validates the force profile across the full firing stroke.
Why do you work with Nitinol for minimally invasive devices?
Nitinol is a nickel-titanium alloy with two properties that matter in minimally invasive surgery: superelasticity, so a part can be compressed or bent to pass through a narrow trocar or catheter and then recover its shape, and shape memory, so it can be set to adopt a specific geometry. That makes it well suited to medical clips, ligating devices, and self-expanding components that must be delivered small and deploy precisely at the site. RPK Medical specializes in MIS components in Nitinol and other special materials, forming them to the tight tolerances and clean edges these applications require.
What's different about ligation and clip appliers versus staplers?
They share the DNA, a spring-driven mechanism forming or placing a metal fastener with precise, repeatable force, but a clip applier closes a single clip around a vessel or duct rather than forming a line of staples, and it often has to do so through a long, narrow shaft with articulation. The priorities shift toward compactness, low and controlled closing force, and secure retention of the clip until the moment of release. RPK Medical supplies the compression and torsion springs, the formed jaws and drivers, and the Nitinol clips these devices use, engineered as a working mechanism rather than separate parts.

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