IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0250959
(1981-04-01)
|
발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
3 |
초록
▼
This invention relates to walking aids in general, and more specifically to a wheelchair structure, which is adapted to be used in the normal manner, but which is modified in such a way that it will serve the dual function of walking aid, by incorporation into the standard wheelchair design, of a br
This invention relates to walking aids in general, and more specifically to a wheelchair structure, which is adapted to be used in the normal manner, but which is modified in such a way that it will serve the dual function of walking aid, by incorporation into the standard wheelchair design, of a braking mechanism mounted on a support surface of the wheelchair, which is normally gripped by someone other than the occupant of the chair, and further by the provision of a weighted element which changes the normal center of gravity of the wheel chair to improve its stability in the walking aid mode.
대표청구항
▼
1. An improved wheelchair having a frame disposed on front and rear wheel assemblies, a pair of handles extending rearwardly from the frame, a seat, side panels and a back portion disposed on the frame to support a patient, and a first manually actuated rear wheel brake mechanism disposed on the fra
1. An improved wheelchair having a frame disposed on front and rear wheel assemblies, a pair of handles extending rearwardly from the frame, a seat, side panels and a back portion disposed on the frame to support a patient, and a first manually actuated rear wheel brake mechanism disposed on the frame in such a location that it is easily accessible to a patient sitting in the wheelchair; wherein, the improvement comprises the addition to the aforementioned structure of the following; a moveable mass disposed on, and extending across the width of the frame, and attached thereto intermediate the front and rear wheel assemblies, wherein, the weighted mass is disposed on the frame at a position forward and below, both the axle of the rear wheel assembly, and the normal center of gravity of said wheelchair, and is loosely supported on the frame in such a manner, that it does not inhibit the inherent flexibility of the wheelchair; a second brake member connected and pivotally disposed with respect to said weighted mass, and adapted to apply uniform braking forces across said rear wheel assembly; and a second brake member actuation mechanism operatively connected to both said weighted mass and said second brake member, and disposed on at least one of said rearwardly extending handles; wherein, said second brake member is secured to a U-shaped support bracket, which is pivotally disposed with respect to said weighted mass; and said second brake member further comprises an elongated brake element, which extends across the width of said frame, and beyond said rear wheel assembly. 2. An improved wheelchair as in claim 1; wherein, the operative connection between the second brake member and the weighted mass is in the form of a spring, which normally biases the second brake member away from the engagement with the rear wheel assembly. 3. An improved wheelchair as in claim 2; wherein, said second brake actuation mechanism further comprises a lever and flexible cable arrangement, operatively connected to the mid-point of said elongated brake element, so that the actuating forces transmitted to said element are equally distributed to said rear wheel assembly.
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