US 8,783,392 B2Granted

Tracked mobility device

AssigneeFreedom One Mobility LLC

InventorTravis Underwood

Life of this patent

Estimating the term…

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Abstract

A tracked mobility device includes: a) a frame supporting a seat; b) a pair of track drives connected to the frame, with each track drive including a powered center drive wheel, a front roller, a rear roller, and a flexible track, with the center drive wheel having a diameter that is at least 50% greater than the diameter of either the front roller or the rear roller, and c) a rear wheel assembly connected to the frame, with the rear wheel assembly having three wheels sharing a common axle, with the diameter of the center rear wheel being at least 10% larger than the diameter of the two outer rear wheels; d) a source of power to power said center drive wheels; and e) a controller effective for controlling the speed and direction of rotation of each of the track drives.

Claims18

Dependent claims

A tracked mobility device, comprising:

a) a frame supporting a seat;
b) a pair of track drives connected to said frame, with each track drive comprising a powered center drive wheel, a front roller, a rear roller, and a flexible track;
wherein said center drive wheel has a first diameter, said front roller has a second diameter, and said rear roller has a third diameter,
wherein said center drive wheel diameter is at least 20% greater than either said front roller diameter or said rear roller diameter;
c) a rear wheel assembly connected to said frame and comprising three wheels sharing a common axle, said rear wheel assembly comprising a center wheel having a center wheel diameter, a first outer wheel having a diameter at least 10% smaller than said center wheel diameter, and a second outer wheel having a diameter at least 10% smaller than said center wheel diameter;
and
d) a controller effective for controlling the speed and direction of rotation of each of the track drives.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/765,182Filed 12 Feb 2013 · continuation in part
Priority: 4 Aug 2009
Published: US 2013/0153308 A120 Jun 2013
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61G 5/065
With eccentrically mounted wheels: with three or more wheels mounted on a rotary cross member, e.g. spiders or spoked wheels with small wheels at…
A61G 5/066
With obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps: with endless belts
A61G 5/125
Rests specially adapted therefor, e.g. for the head or the feet: for arms
A61G 5/128
Rests specially adapted therefor, e.g. for the head or the feet: for feet

Family

Application61/231,160Us provisional application · filed 4 Aug 2009
Application12/849,897Parent of this continuation-in-part · filed 4 Aug 2010
US 2013/0153308 A1Pre-grant publication · published 20 Jun 2013
US 8,371,403 B2Parent of this continuation-in-part
US 2011/0031045 A1Published application
US 8,783,392 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

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