Before becoming a must-have in workplaces around the world, the first thumbnail was born out of a simple need: to move manure faster. It may look humble, but this little three-wheeled machine, built by two inventive brothers in a Minnesota workshop, it would go on to reshape the future of construction, landscaping and agriculture.
Whether you lead a crew or to operate same, the history of the first mini loader it’s a reminder that some of the biggest innovations start small, and sometimes on a turkey farm.

Who invented the miniature?
The story of the first thumbnail begins in 1957 with two brothers from Minnesota: Louis and Cyril Keller. Known for their mechanical ingenuity, the Kellers were approached by a local turkey farmer who needed a solution to a frustrating problem: cleaning manure from the inside of their cramped barns. Traditional tractors were too big and clumsy for the job.
The Keller brothers responded with a custom-built three-wheeled machine that was compact, maneuverable and capable of turning within its own footprint. this it wasn’t only effective, it was revolutionary. This self-produced machine would later be recognized as the first mini loader.
His invention quickly attracted attention Melroe Manufacturing Company, a company based in North Dakota that saw the potential of this small but powerful machine.
With the Kellers on board, Melroe refined and renamed the design, resulting in the M-400 in 1960, an evolution on four wheels that became the first Bobcat minicar. Agile, resistant and versatile, laid the foundation for the miniature as we know it today.
From Keller’s Barn to Bobcat: The Evolution
After the Keller brothers became partners Melroe Manufacturing, his handcrafted machine started a transformation that would change the world of construction. The original three-wheel design was powerful in tight spaces, but lacked the stability and traction needed for the toughest jobsites. This led to the development of a new version, one with four wheels that could “skate” to steer.
This redesign became the first Bobcat minicarofficially launched in 1960 as the M-400. It was the first true mini loader with independent wheel control, which allows you to turn sharply and to operate in places larger teams couldn’t arrive The term “minicar” comes directly from how the machine spins, causing its wheels to spin in opposite directions instead of using a traditional steering mechanism.
Bobcat’s branding captured the spirit of the machine: small but fierce, fast and tough. Operators immediately he recognized its value, especially in construction, agriculture and landscaping, where space is often at a premium limited and versatility is key.
The success of the first mini loader setting the stage for a full line of compact equipment. What started with a turkey barn problem became the basis for one of the most recognized equipment brands in the world and it all started with the original invention of the Keller brothers.
How the minicar changed the industry
The arrival of the first thumbnail he didn’t it only solves that of a farmer problem, it opened up a whole new way of working. What started as a nimble barn-clearing machine quickly proved useful in dozens of industries, from construction and demolition to snow removal and landscaping.
With its compact size, tight turning radius and ability to handle a wide range of attachments, the first mini loader introduced a level of versatility that heavy equipment had never seen before. Do you need to dig, lift, rake, rake or sweep? One machine could now do everything and in larger equipment spaces couldn’t access.
Contractors began to realize that they did not need a separate machine for each task. A skid steer loader with a quick-connect system and a few key accessories could replace several pieces of equipment, saving space, time and money.
As technology advanced, so did the machines: better hydraulics, stronger lift arms, improved operator comfort and even compact track options for softer terrain. But the DNA of every modern drive still comes from that first innovative design.
Why is it called a miniature?
the name “mini-street” it may seem unusual at first, but it describes exactly how the machine works operate. Unlike a traditional car or tractor that uses front-wheel steering, a ministeer turns by locking or slowing one side of its wheels while driving the other., making the machine to skate or swing sharply into place.
This turning method allows for an incredibly tight turning radius, making the first thumbnail a game changer for working in small spaces such as barns, alleys and urban workplaces. The design remove the need for a steering shaft entirely, replacing it with independent hydraulic control on each side.
The first mini loaderdesigned by the Keller brothers, it was already ahead of its time in terms of maneuverability. But when Melroe presented the M-400 with four wheels and a true “anti-slip steering”, defined a new category of compact equipment.

Farm repair to workplace icon
The first thumbnail it wasn’t built in a factory. It was created in a small shop by two brothers solving a real world problem and that is exactly what makes him legendary. From its humble beginnings on a turkey farm to becoming the backbone of modern construction sites, the minicar’s journey is a testament to practical innovation.
The legacy of first thumbnail alive in every job you tackle, and the right attachment makes all the difference. At Skid Steers Direct, we specialize in high quality skid steers and accessories that help you achieve more donefaster
whether you are excavating, leveling, transporting or clearing, we have you have the tools to turn your machine into a work center. Browse our full collection of accessories for mini carts or contact our team.
