[특허]Wheelchair suspension

Invacare Corporation

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Wheelchair suspension

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60K-001/02 A61G-005/10 A61G-005/06 A61G-005/04
출원번호	US-0690678 (2015-04-20)
등록번호	US-9913768 (2018-03-13)
발명자 / 주소	Cuson, Robert L. Bekoscke, Robert A. Stothard, Daniel J.
출원인 / 주소	Invacare Corporation
대리인 / 주소	Calfee, Halter & Griswold LLP
인용정보	피인용 횟수 : 2 인용 특허 : 264

초록
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A wheelchair suspension assembly includes a frame, a drive assembly, an anti-tip linkage, a front anti-tip wheel, and a rear anti-tip wheel. The drive assembly includes a drive wheel. The front anti-tip wheel is positioned forward of the drive wheel by the anti-tip linkage. The rear anti-tip wheel is positioned rearward of the drive wheel the anti-tip linkage. The anti-tip linkage couples the front anti-tip wheel to the rear anti-tip wheel such that upward movement of the front anti-tip wheel relative to the frame causes upward movement of the rear anti-tip wheel relative to the frame. The anti-tip linkage includes a front anti-tip pivot arm that is pivotally coupled to the frame, a rear anti-tip pivot arm that is pivotally coupled to the frame, and a connecting link that couples the front anti-tip pivot arm and the rear anti-tip pivot arm.

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1. A wheelchair comprising: a frame;first and second drive assemblies that each include a drive wheel;first and second suspension assemblies that each include an anti-tip linkage and a shock absorber with a spring return;first and second front anti-tip wheels positioned forward of the drive wheels by the first and second anti-tip linkages;first and second rear anti-tip wheels positioned rearward of the drive wheels by the first and second anti-tip linkages;the first anti-tip linkage couples the first front anti-tip wheel to the first rear anti-tip wheel such that upward movement of the first front anti-tip wheel relative to the frame causes upward movement of the first rear anti-tip wheel relative to the frame, wherein the first anti-tip linkage includes a first rigid front anti-tip pivot arm that is pivotally coupled to the frame, a first rigid rear anti-tip pivot arm that is pivotally coupled to the frame, and a first rigid connecting link that couples the first rigid front anti-tip pivot arm and the first rigid rear anti-tip pivot arm;wherein the first shock absorber with spring return is directly coupled to the first rigid rear anti-tip pivot arm and is directly coupled to the frame to bias the first rigid rear anti-tip pivot arm downward relative to the frame;the second anti-tip linkage couples the second front anti-tip wheel to the second rear anti-tip wheel such that upward movement of the second front anti-tip wheel relative to the frame causes upward movement of the second rear anti-tip wheel relative to the frame, wherein the second anti-tip linkage includes a second rigid front anti-tip pivot arm that is pivotally coupled to the frame, a second rigid rear anti-tip pivot arm that is pivotally coupled to the frame, and a second rigid connecting link that couples the second rigid front anti-tip pivot arm and the second rigid rear anti-tip pivot arm;wherein the second shock absorber with spring return is directly coupled to the second rigid rear anti-tip pivot arm and is directly coupled to the frame to bias the second rigid rear anti-tip pivot arm downward relative to the frame;wherein the first drive assembly is pivotally coupled to the frame at a first drive assembly pivot axis that is forward of an axis of rotation of the drive wheel of the first drive assembly;wherein the first drive assembly is biased downward relative to the frame by a first drive assembly biasing spring that is coupled to the frame;wherein the second drive assembly is pivotally coupled to the frame at a second drive assembly pivot axis that is forward of an axis of rotation of the drive wheel of the second drive assembly; andwherein the second drive assembly is biased downward relative to the frame by a second drive assembly biasing spring that is coupled to the frame. 2. The wheelchair of claim 1 wherein the first rigid connecting link is pivotally connected to the first rigid front anti-tip pivot arm and the first rigid rear anti-tip pivot arm and the second rigid connecting link is pivotally connected to the second rigid front anti-tip pivot arm and the second rigid rear anti-tip pivot arm. 3. A wheelchair suspension assembly comprising: a frame;a drive assembly that includes a drive wheel;an anti-tip linkage;an anti-tip linkage spring;a front anti-tip wheel positioned forward of the drive wheel by the anti-tip linkage;a rear anti-tip wheel positioned rearward of the drive wheel the anti-tip linkage;wherein the anti-tip linkage couples the front anti-tip wheel to the rear anti-tip wheel such that upward movement of the front anti-tip wheel relative to the frame causes upward movement of the rear anti-tip wheel relative to the frame;wherein the anti-tip linkage includes a front anti-tip pivot arm that is pivotally coupled to the frame, a rear anti-tip pivot arm that is pivotally coupled to the frame, and a connecting link that couples the front anti-tip pivot arm and the rear anti-tip pivot arm;wherein the anti-tip linkage spring is directly coupled to the rear anti-tip pivot will and is directly coupled to the frame to bias the rear anti-tip pivot arm downward relative to the frame; andwherein the drive assembly is pivotally coupled to the frame at a first drive assembly pivot axis. 4. The wheelchair suspension assembly of claim 3 wherein the anti-tip linkage spring comprises a shock absorber with a spring return. 5. The wheelchair suspension assembly of claim 3 wherein the front anti-tip pivot arm is rigid. 6. The wheelchair suspension assembly of claim 3 wherein the rear anti-tip pivot arm is rigid. 7. The wheelchair suspension assembly of claim 3 wherein the connecting link is rigid. 8. The wheelchair suspension assembly of claim 3 wherein the drive assembly pivot axis is forward of the axis of rotation of the drive wheel. 9. The wheelchair suspension assembly of claim 3 wherein the drive assembly is biased downward relative to the frame by a drive assembly biasing spring. 10. The wheelchair suspension assembly of claim 3 wherein the connecting link is pivotally connected to the front anti-tip pivot arm and the rear anti-tip pivot arm.

이 특허에 인용된 특허 (264)

이 특허를 인용한 특허 피인용횟수: 2

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구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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Wheelchair suspension

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이 특허에 인용된 특허 (264)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

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IPC 상세정보(version : 201201)

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Wheelchair suspension

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이 특허에 인용된 특허 (264)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

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