Seat supporting assembly and wheelchair including same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61G-005/14
A61G-005/04
출원번호
US-0083698
(2006-10-17)
등록번호
US-8297641
(2012-10-30)
국제출원번호
PCT/CA2006/001702
(2006-10-17)
§371/§102 date
20080417
(20080417)
국제공개번호
WO2007/045083
(2007-04-26)
발명자
/ 주소
Landry, Carmon
Dugas, Eric
출원인 / 주소
Landry, Carmon
인용정보
피인용 횟수 :
5인용 특허 :
3
초록▼
A seat supporting assembly (24) for supporting a seat (18), the assembly comprising a base (25) including a substantially elongated guiding rod (58), a seat support (36), a seat support-to-base linking member (56) pivotally coupled to the seat support (36) and sliding on the base guiding rod (58), a
A seat supporting assembly (24) for supporting a seat (18), the assembly comprising a base (25) including a substantially elongated guiding rod (58), a seat support (36), a seat support-to-base linking member (56) pivotally coupled to the seat support (36) and sliding on the base guiding rod (58), a substantially elongated tilting member (60) having a guiding groove (66) and being pivotally attached to the seat support (36) and to the base (25). An actuating assembly (44) is coupled to the base (25) and includes a motion transmitting member (68) mounted within the guiding groove (60). The force from the actuating assembly moves the tilting member (60) according to the geometry of the guiding groove (66), which causes the seat supporting assembly (24) to move between tilted and upright configurations by pivoting the tilting member (60) relative to the seat support (36) and the base (25) and substantially simultaneously moving the seat support-to-base linking member (56) longitudinally relative to the guiding rod (58). The assembly is designed to maintain the location of the center of gravity of a user as the seat tilts rearwardly by automatically moving the seat forwardly during tilting. The guiding groove (66) in the tilting member (60) may be curved such that the tilting motion occurs with a constant angular velocity The seat assembly is particularly useful for wheelchairs.
대표청구항▼
1. A seat supporting assembly for supporting a seat, said seat supporting assembly comprising: a base, said base including a substantially elongated base guiding member;a seat support for supporting the seat;a seat support-to-base linking member, said seat support-to-base linking member being operat
1. A seat supporting assembly for supporting a seat, said seat supporting assembly comprising: a base, said base including a substantially elongated base guiding member;a seat support for supporting the seat;a seat support-to-base linking member, said seat support-to-base linking member being operatively coupled to said seat support and to said base guiding member with said seat support being tiltable relative to said base and said seat support-to-base linking member being substantially longitudinally movable relative to said base guiding member;a substantially elongated tilting member defining a tilting member first end section, a substantially longitudinally opposed tilting member second end section and a tilting member intermediate section extending therebetween, said tilting member intermediate section defining a guiding groove extending generally longitudinally relative to said tilting member, said tilting member first end section being pivotally attached to said seat support in a substantially spaced apart relationship relative to seat support-to-base linking member, said tilting member second end section being pivotally attached to said base; andan actuating assembly operatively coupled to said base and to said tilting member for moving said seat supporting assembly between an upright configuration and a tilted configuration, a seat support-to-base angle between said seat support and said base being larger in said tilted configuration than in said upright configuration, said actuating assembly including a motion transmitting member mounted to said guiding groove so as to be substantially slidably movable relative thereto, said motion transmitting member being movable relative to said base along a predetermined path;wherein moving said motion transmitting member along said predetermined path slides said motion transmitting member relative to said guiding groove, which causes said seat supporting assembly to move between said tilted and upright configurations by pivoting said tilting member relative to said seat support and said base and substantially simultaneously moving said seat support-to-base linking member substantially longitudinally relative to said base guiding member. 2. A seat supporting assembly as defined in claim 1, wherein said guiding groove is, at least in part, curved. 3. A seat supporting assembly as defined in claim 2, wherein said guiding groove is configured, sized and located so that said seat support-to-base angle varies at a substantially constant angular speed as said seat supporting assembly moves between said upright and tilted configurations in response to said motion transmitting member moving at a substantially constant speed along said predetermined path. 4. A seat supporting assembly as defined in claim 2, wherein said guiding groove includes a substantially arc segment shaped portion. 5. A seat supporting assembly as defined in claim 2, wherein said guiding groove includes a guiding groove first section located substantially adjacent said tilting member first end section and a guiding groove second section located substantially adjacent said tilting member second end section, said guiding groove first and second sections being each substantially arc segment shaped and having respectively a first radius of curvature and a second radius of curvature, said second radius of curvature being substantially smaller than said first radius of curvature, said guiding groove first and second sections being configured and sized such that continuous movement of said motion transmitting member therealong is uninterrupted as said motion transmitting member moves from one of said guiding groove first and second sections to the other one of said guiding groove first and second sections. 6. A seat supporting assembly as defined in claim 1, wherein said predetermined path is substantially rectilinear. 7. A seat supporting assembly as defined in claim 6, wherein said predetermined path is substantially parallel to said base guiding member. 8. A seat supporting assembly as defined in claim 1, wherein said actuating assembly includes an actuating assembly frame mounted to said base so as to be movable relative thereto over a substantially rectilinear path, said motion transmitting member being mechanically coupled to said actuating assembly frame. 9. A seat supporting assembly as defined in claim 8, wherein said actuating assembly includes a linear-type actuator having substantially opposed actuator first and second end portions, said actuator first and second end portions being attached respectively to said base and to said actuating assembly frame, said linear-type actuator being selectively movable between a retracted configuration and an extended configuration, said actuator first and second end portions being closer to each other in said retracted configuration than in said extended configuration. 10. A seat supporting assembly as defined in claim 1, wherein said motion transmitting member includes a transmitting pin substantially fittingly and substantially slidably mounted into said guiding groove. 11. A seat supporting assembly as defined in claim 1, wherein said base guiding member includes a rod and said seat support-to-base linking member includes a collar defining a collar aperture, said base guiding member being slidably mounted into said collar aperture. 12. A wheelchair for supporting an intended user, said wheelchair comprising: a wheelchair frame;at least three wheels rotatably mounted to said wheelchair frame;a seat supporting assembly attached to said wheelchair frame, said seat supporting assembly including a base, said base including a substantially elongated base guiding member;a seat support;a seat support-to-base linking member, said seat support-to-base linking member being operatively coupled to said seat support and to said base guiding member with said seat support being tiltable relative to said base and said seat support-to-base linking member being substantially longitudinally movable relative to said base guiding member;a substantially elongated tilting member defining a tilting member first end section, a substantially longitudinally opposed tilting member second end section and a tilting member intermediate section extending therebetween, said tilting member intermediate section defining a guiding groove extending generally longitudinally relative to said tilting member, said tilting member first end section being pivotally attached to said seat support in a substantially spaced apart relationship relative to seat support-to-base linking member, said tilting member second end section being pivotally attached to said base; and an actuating assembly operatively coupled to said base and to said tilting member for moving said seat supporting assembly between an upright configuration and a tilted configuration, a seat support-to-base angle between said seat support and said base being larger in said tilted configuration than in said upright configuration, said actuating assembly including a motion transmitting member mounted to said guiding groove so as to be substantially slidably movable relative thereto, said motion transmitting member being movable relative to said base along a predetermined path;wherein moving said motion transmitting member along said predetermined path slides said motion transmitting member relative to said guiding groove, which causes said seat supporting assembly to move between said tilted and upright configurations by pivoting said tilting member relative to said seat support and said base and substantially simultaneously moving said seat support-to-base linking member substantially longitudinally relative to said base guiding member, anda seat mounted to said seat support. 13. A wheelchair as defined in claim 12, wherein said at least three wheels define a sustentation polygon and said seat supporting assembly is located, configured and sized so that a combined center of gravity of said seat supporting assembly, said seat and the intended user remains substantially within said sustentation polygon with the intended user sitting in said seat and said seat supporting assembly being moved between said upright and tilted configurations. 14. A tiltable seat assembly, said tiltable seat assembly comprising: a seat supporting assembly, said seat supporting assembly including a base, said base including a substantially elongated base guiding member;a seat support;a seat support-to-base linking member, said seat support-to-base linking member being operatively coupled to said seat support and to said base guiding member with said seat support being tiltable relative to said base and said seat support-to-base linking member being substantially longitudinally movable relative to said base guiding member;a substantially elongated tilting member defining a tilting member first end section, a substantially longitudinally opposed tilting member second end section and a tilting member intermediate section extending therebetween, said tilting member intermediate section defining a guiding groove extending generally longitudinally relative to said tilting member, said tilting member first end section being pivotally attached to said seat support in a substantially spaced apart relationship relative to seat support-to-base linking member, said tilting member second end section being pivotally attached to said base; andan actuating assembly operatively coupled to said base and to said tilting member for moving said seat supporting assembly between an upright configuration and a tilted configuration, a seat support-to-base angle between said seat support and said base being larger in said tilted configuration than in said upright configuration, said actuating assembly including a motion transmitting member mounted to said guiding groove so as to be substantially slidably movable relative thereto, said motion transmitting member being movable relative to said base along a predetermined path;wherein moving said motion transmitting member along said predetermined path slides said motion transmitting member relative to said guiding groove, which causes said seat supporting assembly to move between said tilted and upright configurations by pivoting said tilting member relative to said seat support and said base and substantially simultaneously moving said seat support-to-base linking member substantially longitudinally relative to said base guiding member, anda seat mounted to said seat support. 15. A wheelchair as defined in claim 12, wherein said seat includes a seat frame defining a bench section and a backrest section, said seat support and said bench section being substantially adjacent and substantially parallel to each other. 16. A tiltable seat assembly as defined in claim 14, wherein said seat includes a seat frame defining a bench section and a backrest section, said seat support and said bench section being substantially adjacent and substantially parallel to each other. 17. A tiltable seat assembly, said tillable seat assembly comprising: a seat including a seat frame defining a bench section and a backrest section, a seat supporting assembly, said seat supporting assembly including a base, said base including a substantially elongated base guiding member;a seat support for supporting said seat, said seat support and said bench section being substantially adjacent and substantially parallel to each other;a seat support-to-base linking member slidable along said base guiding member and pivotally supporting said seat support so that said seat support is pivotable relative to said base and movable therealong;a substantially elongated tilting member defining a tilting member first end section, a substantially longitudinally opposed tilting member second end section and a tilting member intermediate section extending therebetween, said tilting member intermediate section defining a guiding groove extending generally longitudinally relative to said tilting member, said tilting member first end section being pivotally attached to said seat support in a substantially spaced apart relationship relative to seat support-to-base linking member, said tilting member second end section being pivotally attached to said base and fixed relative thereto; andan actuating assembly operatively coupled to said base and to said tilting member for moving said seat supporting assembly between an upright configuration and a tilted configuration, a seat support-to-base angle between said seat support and said base being larger in said tilted configuration than in said upright configuration, said actuating assembly including a motion transmitting member mounted to said guiding groove so as to be substantially slidably movable relative thereto, said motion transmitting member being movable relative to said base along a predetermined path;wherein moving said motion transmitting member along said predetermined path slides said motion transmitting member relative to said guiding groove, which causes said seat supporting assembly to move between said tilted and upright configurations by pivoting said tilting member relative to said seat support and said base and substantially simultaneously moving said seat support-to-base linking member substantially longitudinally relative to said base guiding member, said seat being pivoted by using said actuating assembly to exert a pivoting force on said seat support at a location spaced apart from said seat support-to-base linking member.
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이 특허에 인용된 특허 (3)
Gerold G Goertzen ; Adrian J. Setacci CA; George Cockram ; Todd M. Dinner ; Hymie Pogir, Constant center of gravity tiltable chair of a wheelchair.
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