Segway

Segway
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Name	Segway
Caption	A rider on a Segway PT i2
Manufacturer	Segway Inc.
Production	2001–2020
Class	Personal transporter
Designer	Dean Kamen

Segway. The Segway is a two-wheeled, self-balancing, battery-powered personal transporter invented by Dean Kamen. It was unveiled in 2001 after a period of intense secrecy and speculation known by the code name "Ginger" or "IT". Marketed as a revolutionary form of personal urban mobility, it utilizes a sophisticated system of gyroscopes, tilt sensors, and microprocessor-controlled electric motors to maintain balance and respond to a rider's leaning motions.

History and development

The invention was primarily the work of Dean Kamen, founder of DEKA Research & Development, who envisioned it as a solution to urban congestion. The project, initially shrouded in mystery, was famously hyped prior to its launch by speculation in the media, including a mention in Steve Jobs' biography. Early financial backing and promotion came from influential figures like John Doerr of Kleiner Perkins. The first commercial model, the Segway HT (Human Transporter), was revealed on Good Morning America in December 2001. The company, Segway Inc., was headquartered in Bedford, New Hampshire. Despite high expectations, consumer adoption was slower than anticipated, and the company faced several ownership changes, including acquisition by a consortium led by Jim Heselden of Hesco bastion in 2009, and later by the Chinese firm Ninebot in 2015, which ceased production of the original model in 2020.

Design and operation

The core technology is based on dynamic stabilization. An array of solid-state gyroscopes and accelerometers, similar to technologies used in the International Space Station, detects the rider's center of mass. This sensor data is processed by onboard microprocessors that command the electric motors in each wheel to move forward or backward to maintain balance. Steering is accomplished via a lean-steer handlebar or, on later models, a pivoting knee bar; turning the control column causes the machine to turn by differentially rotating the wheels. The system is powered by rechargeable lithium-ion batteries and includes redundant systems for safety. Key patents for its self-balancing technology were fiercely defended by the company in numerous legal battles.

Models and variants

The original series was known as the Segway PT (Personal Transporter). Key models included the i2, featuring lean-steer technology and a wireless InfoKey controller, and the x2, designed with wider, knobby tires for off-road use. Several specialized and commercial variants were produced, such as the Segway SE for security and the Segway Centaur, a four-wheeled concept vehicle. Under Ninebot, the product line evolved into consumer-oriented scooters like the Ninebot KickScooter, distancing itself from the original design. Licensed technology also appeared in other devices, including the Robotic Mobility Platform used by the United States Department of Defense and mobility aids like the iBOT wheelchair.

Impact and reception

The Segway received significant early acclaim for its innovative engineering, winning awards like the IDEA gold award from the Industrial Designers Society of America. It found niche success in specific markets: tour guides in cities like San Francisco and Washington, D.C., mall security personnel, and police forces such as the Chicago Police Department adopted it for patrols. However, it became a cultural symbol of technological over-hype and was often parodied in media like Arrested Development and Paul Blart: Mall Cop. Its high price and regulatory hurdles limited mass consumer appeal, and it was never the transformative urban device its creators predicted. The tragic death of Jim Heselden, who died in a Segway-related accident, further marred its public image.

Legal status and regulations

The legal classification of the Segway varied widely across jurisdictions, impacting its use. In the United States, it was generally not considered a motor vehicle under federal law, but state laws differed. Some cities, like Boston, banned them from sidewalks, while others permitted them. In the European Union, it was typically classified as a motor vehicle, requiring type approval, which it often could not meet, restricting its legal use on public roads. Similar regulatory challenges existed in the United Kingdom and Australia, often confining legal operation to private property. These inconsistent laws significantly hindered its adoption as a legitimate form of urban transport.

Category:Electric vehicles Category:Personal transporters Category:Vehicles introduced in 2001