IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0160713
(2002-05-31)
|
발명자
/ 주소 |
- Redman, Don L.
- Redman, Samuel G.
- Schickling, Greggory
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
3 |
초록
▼
Ambulatory apparatus includes a framework mounted to a chassis for movement between sitting, standing and reclining conditions. Leading, trailing and intermediate wheel assemblies are attached to the chassis for supporting the chassis in a first wheeled condition including the leading and intermedia
Ambulatory apparatus includes a framework mounted to a chassis for movement between sitting, standing and reclining conditions. Leading, trailing and intermediate wheel assemblies are attached to the chassis for supporting the chassis in a first wheeled condition including the leading and intermediate wheel assemblies engaged for wheeled movement against a support surface and a second wheeled condition including the trailing and intermediate wheel assemblies engaged for wheeled movement against a support surface. The chassis and the framework define a center of gravity that is centered at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that is centered at the leading wheel assembly in the standing condition of the framework. An attached movable ballast is also provided, which is disposed in relation to the framework causing the defined center of gravity at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that adjusts so as to be disposed in relation to the framework causing the defined center of gravity at the leading wheel assembly in the standing condition of the framework.
대표청구항
▼
1. Ambulatory apparatus comprising:a framework mounted to a chassis for movement between sitting, standing and reclining conditions;leading, trailing and intermediate wheel assemblies attached to the chassis for supporting the chassis in a first wheeled condition comprising the leading and intermedi
1. Ambulatory apparatus comprising:a framework mounted to a chassis for movement between sitting, standing and reclining conditions;leading, trailing and intermediate wheel assemblies attached to the chassis for supporting the chassis in a first wheeled condition comprising the leading and intermediate wheel assemblies engaged for wheeled movement against a support surface and a second wheeled condition comprising the trailing and intermediate wheel assemblies engaged for wheeled movement against a support surface;the chassis and the framework defining a center of gravity that is centered at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that is centered at the leading wheel assembly in the standing condition of the framework; andan attached movable ballast that is disposed in relation to the framework causing the defined center of gravity at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that adjusts so as to be disposed in relation to the framework causing the defined center of gravity at the leading wheel assembly in the standing condition of the framework. 2. Ambulatory apparatus of claim 1, wherein the framework includes a backrest, a seat and a legrest. 3. Ambulatory apparatus of claim 2, wherein the legrest is movable between lowered and raised positions and between shortened and lengthened conditions in response to movement of the legrest between the lowered and raised positions. 4. Ambulatory apparatus of claim 1, further including controls and a drive assembly for driving one of the leading, trailing and intermediate wheel assemblies in response to actuation of the controls. 5. Ambulatory apparatus comprising:a framework mounted to a chassis for movement between first, second and third conditions for supporting and moving an operator between sitting, standing and reclining positions, respectively, the framework having a backrest, a seat and a legrest;leading, trailing and intermediate wheel assemblies attached to the chassis for supporting the chassis in a first wheeled condition comprising the leading and intermediate wheel assemblies engaged for wheeled movement against a support surface and a second wheeled condition comprising the trailing and intermediate wheel assemblies engaged for wheeled movement against a support surface;the chassis and the framework defining a center of gravity that is centered at the intermediate wheel assembly in each of the first and third conditions of the framework, and that is centered at the leading wheel assembly in the second condition of the framework;at least one of the backrest, the seat and the legrest mounted for reciprocal movement for permitting at least one of the backrest, the seat and the legrest to move reciprocally with the operator in response to movement of the framework between the first, second and third conditions; andan attached movable ballast that is disposed in relation to the framework causing the defined center of gravity at the intermediate wheel assembly in each of the first and third conditions of the framework, and that adjusts so as to be disposed in relation to the framework causing the defined center of gravity at the leading wheel assembly in the second condition of the framework. 6. Ambulatory apparatus of claim 5, further including controls and a drive assembly for driving one of the leading, trailing and intermediate wheel assemblies in response to actuation of the controls. 7. Ambulatory apparatus of claim 5, wherein the legrest is movable between lowered and raised positions and between shortened and lengthened conditions in response to movement of the legrest between the lowered and raised positions. 8. Ambulatory apparatus comprising:a body-supporting framework supported by a chassis for movement between first, second and third conditions for supporting and moving an operator between sitting, standing and reclining positions, respecti vely, the framework having a backrest, a seat, a legrest mounted for pivotal movement between lowered and raised positions, and a footrest portion mounted to the legrest for reciprocal movement between retracted and extended conditions;the footrest portion reciprocally moveable between the retracted and extended conditions in response to pivotal movement of the legrest between the lowered and raised positions;leading, trailing and intermediate wheel assemblies attached to the chassis for supporting the chassis in a first wheeled condition comprising the leading and intermediate wheel assemblies engaged for wheeled movement against a support surface and a second wheeled condition comprising the trailing and intermediate wheel assemblies engaged for wheeled movement against a support surface;the chassis and the framework defining a center of gravity that is centered at the intermediate wheel assembly in each of the first and third conditions of the framework, and that is centered at the leading wheel assembly in the second condition of the framework; andan attached movable ballast that is disposed in relation to the framework causing the defined center of gravity at the intermediate wheel assembly in each of the first and third conditions of the framework, and that adjusts so as to be disposed in relation to the framework causing the defined center of gravity at the leading wheel assembly in the second condition of the framework. 9. Ambulatory apparatus of claim 8, further including controls and a drive assembly for driving one of the leading, trailing and intermediate wheel assemblies in response to actuation of the controls. 10. Ambulatory apparatus of claim 9, wherein at least one of the backrest and the seat is mounted for reciprocal movement. 11. Ambulatory apparatus comprising:a chassis supporting a framework that is movable between sitting, standing and reclining conditions, the framework including at least one reciprocally movable body-supporting element;leading, trailing and intermediate wheel assemblies attached to the chassis for supporting the chassis in a first wheeled condition comprising the leading and intermediate wheel assemblies engaged for wheeled movement against a support surface and a second wheeled condition comprising the trailing and intermediate wheel assemblies engaged for wheeled movement against a support surface;the chassis and the framework defining a center of gravity that is centered at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that is centered at the leading wheel assembly in the standing condition of the framework; andan attached movable ballast that is disposed in relation to the framework causing the defined center of gravity at the intermediate wheel assembly in each of the sitting and reclining conditions of the framework, and that adjusts so as to be disposed in relation to the framework causing the defined center of gravity at the leading wheel assembly in the standing condition of the framework. 12. Ambulatory apparatus of claim 11, further including controls and a drive assembly for driving one of the leading, trailing and intermediate wheel assemblies in response to actuation of the controls. 13. Ambulatory apparatus of claim 11, wherein the at least one body-supporting element of the framework comprises one of a backrest, a legrest and a seat. 14. Ambulatory apparatus of claim 11, wherein the framework includes a legrest that is movable between lowered and raised positions and between shortened and lengthened conditions in response to movement of the legrest between the lowered and raised positions.
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