The brothers who invented the world’s first compact loader (later named the Bobcat skid-steer loader), have been selected as 2023 inductees for the National Inventors Hall of Fame (NIHF) in the USA.
Cyril and Louis Keller built their first three-wheeled loader with two drive wheels in front and a caster wheel in the rear – the predecessor to the modern skid-steer loader in 1957.
In the 1950s, brothers Cyril and Louis operated a small machinist-blacksmith shop in Minnesota together, building and repairing machinery for local farmers.
The idea for a new form of loader came after a farmer approached them with a need for a self-propelled loader light enough to be lifted to the second floor of a turkey barn and small enough to clean around the barn’s upright poles.
The loader came to the attention of Melroe Manufacturing Company (now Bobcat), which invited the Kellers to demonstrate their invention in their booth at the Minnesota State Fair in 1958. After a successful demonstration at the fair, the Melroe Manufacturing Company was awarded exclusive manufacturing rights to the machine on a royalty basis and hired the Keller brothers to refine the design and put the machine into production.
To improve on the design of the loader, a second set of drive wheels was added to the back of the loader in 1960. With this four-wheel drive, the M400 became the world’s first true skid-steer loader. ‘Skid-steer’ describes the unique steering system, which enables the machine to turn within its own length. Later, the Bobcat brand name was established because of the machine’s toughness, quickness and agility.
“The Bobcat loader has positively impacted the lives of thousands of employees who have worked for the company, dealers who sell the machines, and customers who use the equipment every day to build their livelihood,” said Joe Keller, son of Louis. “While we may not always realize its impact, it is an integral part of our everyday life—from supporting farm operations that result in food on our tables to hauling materials around a jobsite building our homes and offices.”
As Bobcat celebrates 65 years since the invention of the machine that created the compact equipment industry, it has continued to forge the future of the industry through innovation and forward-thinking.
Bobcat now offers more than 100 products in the compact, grounds maintenance and industrial equipment industries, and produces more than 150 families of attachments.
Acknowledging the award on behalf of his father and uncle, Joe Keller added: “This recognition is a great honour to dad and Cyril’s families, but it is not just for us. It is a recognition for all of the early and current Bobcat employees who have helped bring our little ‘Keller loader’ to be the Bobcat machine it is today. It has been a great honour to have had a front-row seat watching this invention revolutionize the way work gets done around the world.”
