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The earliest recorded history of a wheelchair was inscribed in stone on a Chinese Sarcophagus in the 6th century A.D. [4] There have been many variations on the basic design since then but standard features always included rear wheels, front caster wheels, footrests, side frames and seating features. Until recently wheelchairs were designed for ...
An electric-powered wheelchair, commonly called a "powerchair" is a wheelchair that additionally incorporates batteries and electric motors into the frame and that is controlled by either the user or an attendant, most commonly via a small joystick mounted on the armrest, or on the upper rear of the frame.
Another common equivalent term for a walker is a Zimmer (frame), a genericised trademark from Zimmer Biomet, a major manufacturer of such devices and joint replacement parts. Walking frames have two front wheels, and there are also wheeled walkers available having three or four wheels, also known as rollators .
A motorized wheelchair, powerchair, electric wheelchair, or electric-powered wheelchair (EPW) is a wheelchair that is propelled by means of an electric motor (usually using differential steering) rather than manual power. Motorized wheelchairs are useful for those unable to propel a manual wheelchair or who may need to use a wheelchair for ...
new image based on original (removed/resized sections, added full transparency) 09:08, 13 March 2007: 39 × 42 (3 KB) The wub: Reverted to earlier revision: 17:03, 26 February 2007: 39 × 42 (3 KB) NE2: Thickened the lines. 16:55, 26 February 2007: 36 × 40 (3 KB) NE2: This is a public domain wheelchair symbol that I created from photographs of ...
Set of scales made by Avery early 20th century Set of scales made by Avery in the 1960s An Avery weighing machine, for weighing a person, now in Leominster Museum. The undocumented origin of the company goes back to 1730 when James Ford established the business in Digbeth. On Joseph Balden the then owner's death in 1813 William and Thomas Avery ...
The typical Mecanum design is a four-wheel configuration with an alternating with left- and right-handed rollers whose axles at the top of the wheel are parallel to the diagonal of the vehicle frame (and hence perpendicular to the diagonal when at where the bottom of the wheel contacts the ground).
The front-wheel drive is usually a smaller device and is best used indoors. Rider weight capacity is a minimum of 77 kg (170 pounds) generally upwards to 440 kg (980 pounds) maximum. The rear-wheel drive is used both indoors and outdoors with rider weight capacity of 160 kg (350 pounds).
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