US 4,214,754 · Granted 1980-07-29
The Hollow Metal Golf Driver That Changed Club Manufacturing
Before this patent, golf drivers were made from solid wood or simple designs. This invention showed how to cast a golf club head from stainless steel in two pieces, then weld them together to create a lighter, stronger hollow metal driver with better weight distribution for more accurate shots.
The plain-English version
What it protects
The claim covers a method of manufacturing a hollow metal golf driver by casting a main body from metal (like stainless steel) with an opening on one side, then fitting and welding a second cast piece into that opening to seal it. What's protected here is this specific two-piece casting-and-welding construction technique that creates the hollow interior structure.
Why it matters
This patent represents a shift in golf club manufacturing from traditional wood and forged designs toward precision casting and metal construction. By distributing weight strategically within a hollow metal head, manufacturers could reduce unwanted twisting and bending during the swing, improving accuracy and consistency. This approach became foundational to modern metal wood design and influenced how companies engineered club heads for decades.
Real-world use
When a golfer picks up a modern metal driver at a sporting goods store, the hollow head they're holding likely evolved from manufacturing techniques pioneered by patents like this one.
Original USPTO abstract
An all metal hollow golf driver is formed by casting a first main part from metal, e.g., stainless steel, in the shape of practically a complete golf driver, except for an opening in one side of the driver body, e.g, the sole side. A second cast part fits within the opening and is weldable thereto to form a complete integral hollow metal golf driver. The weight (mass) of the driver is distributed in order to reduce its torque and/or deflection.
Patent details
- Publication number
- US 4,214,754
- Filing date
- 1978-01-25
- Grant date
- 1980-07-29
- Assignee
- Pro-Patterns Inc.
- Inventor(s)
- ZEBELEAN, JOHN
- CPC class
- A63B53/04
Want to file your own patent?
Curious about what makes modern sports equipment unique? Our free patent scanner can help you explore the innovations locked inside your favorite fitness gear.
Free patentability scan