IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0736439
(1985-05-21)
|
우선권정보 |
CH-0002494 (1984-05-21) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Valutec AG (Dottikon CHX 03)
|
인용정보 |
피인용 횟수 :
22 인용 특허 :
4 |
초록
▼
To reduce the weight of the collapsible wheelchair, and the depth of the wheelchair, when collapsed, only three spreader braces (25,49,51) are used to connect, respectively, the back and side frame elements, (45,47) of the collapsible wheelchair together, the remaining interconnection being formed b
To reduce the weight of the collapsible wheelchair, and the depth of the wheelchair, when collapsed, only three spreader braces (25,49,51) are used to connect, respectively, the back and side frame elements, (45,47) of the collapsible wheelchair together, the remaining interconnection being formed by tension cables (53;57′,57″,59″), which tend to counteract the spreading effect of the collapsible spreader braces, and are located, with respect to the spreader braces, in triangular position, one (53) of the tensioning cable extending parallel to two spreader braces (49,51) located in triangular configuration with respect to the frame elements (45,47), and other tensioning cables extending diagonally, in pairs (57,59) between the frame elements (45,47), located at the rear portion of the chair to hold the rear portion towards each other when the weight (24) of the user tends to pull together the forward portions (45d,47d) of the frame elements (45,47). The spreader braces are preferably formed with over-center toggle, or knee joints and lockable in position by a safety connecting sleeve (61).
대표청구항
▼
Collapsible mobile wheelchair structure, comprising a support frame or chassis (11) including two substantially rigid side frame elements (45, 47) each having two support wheels coupled thereto; collapsible spreader braces (24, 49, 51) movably connected to said side frame elements and, when in a str
Collapsible mobile wheelchair structure, comprising a support frame or chassis (11) including two substantially rigid side frame elements (45, 47) each having two support wheels coupled thereto; collapsible spreader braces (24, 49, 51) movably connected to said side frame elements and, when in a straight condition, maintaining the side frame elements at a predetermined distance from each other to define a use condition, while permitting, upon collapse of the spreader braces, folding of the side frame elements towards and close to each other, said collapsible spreader braces including means for permitting a limited amount of twisting movement of said side frame elements relative to each other substantially in the planes of said side frame elements when said collapsible spreader braces are in said straight condition to define said use condition, and said collapsible spreader braces (24, 49, 51) including brace elements (48, 52) and a collapsing joint (50, 61) connecting and attaching said brace elements together, said collapsing joint maintaining said brace elements, selectively, in essentially aligned position, while permitting collapsing of the brace elements towards each other; a collapsible seat (22) secured to each of the side frame elements; and at least one tension cable means (53; 57′, 57″, 59, 59″) connecting the side frame elements (45, 47) together, said at least one tension cable means comprising at least one pair (57, 59) of flexible elongated tension cables each being diagonally connected between opposite side frame elements (45, 57) to apply compressive forces to said spreader braces when said spreader braces are in said straight condition, said tension cable means permitting said twisting movement of one of said side frame elements relative to the other side frame element even when said support wheels are on an uneven support surface, thereby providing solid support on an uneven support surface.
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