[특허]Tracked mobility device

Freedom One Mobility LLC

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특허 상세정보

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Tracked mobility device

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B62D-055/104 A61G-005/06
미국특허분류(USC)	180/009.52; 180/006.5; 180/006.54
출원번호	US-0765182 (2013-02-12)
등록번호	US-8783392 (2014-07-22)
발명자 / 주소	Underwood, Travis
출원인 / 주소	Freedom One Mobility LLC
대리인 / 주소	Woodard, Emhardt, Moriarty, McNett & Henry LLP
인용정보	피인용 횟수 : 1 인용 특허 : 22

초록
▼

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% la...

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청구항
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1. 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; andd) a controller effective for controlling the speed and direction of rotation of each of the track drives. 2. The tracked mobility device of claim 1 wherein each track drive consists essentially of the powered center drive wheel, the front roller, the rear roller, and the flexible track. 3. The tracked mobility device of claim 2 wherein said center drive wheel diameter is at least 80% greater than either said front roller diameter or said rear roller diameter. 4. The tracked mobility device of claim 2 wherein said center drive wheel has a diameter of between 8 inches and 12 inches, said front roller has a diameter between 4 inches and 8 inches, and said rear roller has a diameter between 4 inches and 8 inches. 5. The tracked mobility device of claim 4 wherein said center drive wheel has a diameter of about 10 inches, said front roller has a diameter of about 5 inches, and said rear roller has a diameter of about 5 inches. 6. The tracked mobility device of claim 1 wherein said inner wheel has a diameter of between 8 inches and 12 inches, said first outer wheel has a diameter of between 6 inches and 10 inches, and said second outer wheel has a diameter of between 6 inches and 10 inches. 7. The tracked mobility device of claim 1 wherein said inner wheel has a diameter of about 10 inches, said first outer wheel has a diameter of about 8 inches, and said second outer wheel has a diameter of about 8 inches. 8. The tracked mobility device of claim 1, wherein said center drive wheel comprises a plurality of outwardly extending ridges defining grooves therebetween, and wherein said track comprises a plurality of inwardly extending ridges defining grooves therebetween, and wherein said outwardly extending ridges and said inwardly extending ridges are sized and spaced such that said inwardly extending ridges fit in the grooves formed by said outwardly extending ridges to allow the center drive wheel ridges to mate with the track ridges as the center drive wheel pulls the track. 9. 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 drive wheel, a first roller, a second roller, and a flexible track; wherein said drive wheel has a first diameter, said first roller has a second diameter, and said second roller has a third diameter,wherein said drive wheel diameter is at least 20% greater than either said first roller diameter or said second roller diameter;c) a rear wheel assembly connected to said frame and comprising three wheels sharing a common axle, with said three wheels 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; andd) a controller effective for controlling the speed and direction of rotation of each of the track drives. 10. The tracked mobility device of claim 1, wherein a bottom portion of each of said track drives forms a shallow “V” shape that contacts a flat, level ground surface only at an area that is less than the diameter of the center wheel or roller. 11. The tracked mobility device of claim 9 wherein each track drive consists essentially of the powered drive wheel, the front roller, the rear roller, and the flexible track. 12. The tracked mobility device of claim 11 wherein said powered drive wheel has a diameter that is at least 80% greater than either said first roller diameter or said second roller diameter. 13. The tracked mobility device of claim 11 wherein said powered drive wheel has a diameter of between 8 inches and 12 inches, said first roller has a diameter between 4 inches and 8 inches, and said second roller has a diameter between 4 inches and 8 inches. 14. The tracked mobility device of claim 13 wherein said powered drive wheel has a diameter of about 10 inches, said first roller has a diameter of about 5 inches, and said second roller has a diameter of about 5 inches. 15. The tracked mobility device of claim 9 wherein said center wheel has a diameter of between 8 inches and 12 inches, said first outer wheel has a diameter of between 6 inches and 10 inches, and said second outer wheel has a diameter of between 6 inches and 10 inches. 16. The tracked mobility device of claim 9 wherein said center wheel has a diameter of about 10 inches, said first outer wheel has a diameter of about 8 inches, and said second outer wheel has a diameter of about 8 inches. 17. The tracked mobility device of claim 9, wherein said powered drive wheel comprises a plurality of outwardly extending ridges defining grooves therebetween, and wherein said track comprises a plurality of inwardly extending ridges defining grooves therebetween, and wherein said outwardly extending ridges and said inwardly extending ridges are sized and spaced such that said inwardly extending ridges fit in the grooves formed by said outwardly extending ridges to allow the center drive wheel ridges to mate with the track ridges as the drive wheel pulls the track. 18. The tracked mobility device of claim 9, wherein the bottom portion of each of said track drives forms a shallow “V” shape that contacts a flat, level ground surface only at an area that is less than the diameter of the center wheel or roller.

이 특허에 인용된 특허 (22)

이 특허를 인용한 특허 피인용횟수: 1

Howe, Michael David; Howe, Geoffrey Scott. Versatile off-road chair. USP2018019873468.

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상세정보
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특허 상세정보

Tracked mobility device

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이 특허에 인용된 특허 (22)

이 특허를 인용한 특허 피인용횟수: 1

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Tracked mobility device

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이 특허에 인용된 특허 (22)

이 특허를 인용한 특허 피인용횟수: 1

IPC 상위 출원인

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IPC 상세정보(version : 201201)

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