CA2463296A1 - Wheelchair suspension having pivotal motor mount - Google Patents

Wheelchair suspension having pivotal motor mount Download PDF

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Publication number
CA2463296A1
CA2463296A1 CA002463296A CA2463296A CA2463296A1 CA 2463296 A1 CA2463296 A1 CA 2463296A1 CA 002463296 A CA002463296 A CA 002463296A CA 2463296 A CA2463296 A CA 2463296A CA 2463296 A1 CA2463296 A1 CA 2463296A1
Authority
CA
Canada
Prior art keywords
engagement surface
suspension
frame
pivot arm
drive assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002463296A
Other languages
French (fr)
Other versions
CA2463296C (en
Inventor
Gerald E. Fought
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Invacare Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2463296A1 publication Critical patent/CA2463296A1/en
Application granted granted Critical
Publication of CA2463296C publication Critical patent/CA2463296C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/043—Mid wheel drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S180/00—Motor vehicles
    • Y10S180/907—Motorized wheelchairs

Abstract

The present invention provides a suspension for a conveyance that is capable of traversing obstacles and rough terrain. In this regard, the suspension ha s a frame member and a pivoting assembly. The pivoting assembly has a pivot ar m and a drive assembly. The pivot arm is pivotally coupled to the frame and ha s a first engagement surface. The drive assembly is pivotally coupled to the frame and has a second engagement surface configured to engage the first engagement surface. The second engagement surface is further configured to disengage from the first engagement surface upon pivotal movement of the dri ve assembly in a first direction and to re-engage the first engagement surface upon pivotal movement of the drive assembly in a second direction.

Claims (20)

1. A wheelchair suspension comprising:
a frame member;
a pivoting assembly having:
a pivot arm pivotally coupled to the frame and having a first engagement surface;
a drive assembly pivotally coupled to the frame and having a second engagement surface configured to engage the first engagement surface; and wherein the second engagement surface is configured to disengage from the first engagement surf ace upon pivotal movement of the drive assembly in a first direction.
2. The suspension of clam 1 wherein the first engagement surface comprises a shoulder.
3. The suspension of claim 1 wherein the second engagement surface comprises a cylindrical shape.
4. The suspension of claim 1 wherein the first engagement surface comprises an undulating surface.
5. The suspension of claim 3 wherein the cylindrical shape is received by the undulating surface.
6. The suspension of claim 1 wherein the pivot arm and the drive assembly are pivotally coupled to the frame at a common location on the frame.
7. The suspension of claim 1 further comprising a resilient member for regulating the second engagement surface disengage from the first engagement.
8. The suspension of claim 1 wherein the pivot arm further comprises a first and second ends and wherein the first end has a castor assembly coupled thereto and wherein the second end comprises the first engagement surface.
9. The suspension of claim 6 wherein the pivot arm further comprises a first and second ends and wherein the first end has a castor assembly coupled thereto and wherein the second end comprises the first engagement surface, and wherein the common pivot location is between the first and second ends.
10. A wheelchair suspension comprising:
a frame;
at least one pivot arm pivotally coupled to the frame and having a first engagement surface;
at least one drive assembly pivotally coupled to the frame and having a second engagement surface;
wherein the pivot arm and drive assembly are pivotally coupled to the frame at a common location on the frame; and wherein the first and second engagement surfaces are configured to engage each other upon pivotal motion of the drive assembly in a first direction and to disengage from each other upon pivotal motion of the drive assembly in a second direction.
11. The suspension of claim 10 wherein the first engagement surface comprises a shoulder.
12. The suspension of claim 10 wherein the second engagement surface comprises a cylindrical shape.
13. The suspension of claim 10 wherein the first engagement surface comprises an undulating surface.
14. The suspension of claim 10 further comprising a resilient member disposed between the pivot arm and the drive assembly to limit the relative pivotal movement therebetween.
15. The suspension of claim 10 wherein the pivot arm comprises a front portion having a at least one caster coupled thereto and a rear portion having the first engagement surface.
16. The suspension of claim 15 wherein the pivotal coupling of the pivot arm is between the front and rear portions of the pivot arm.
17. The suspension of claim 10 wherein pivotal motion of the drive assembly in a first direction causes pivotal motion of the pivot arm and pivotal motion of the drive assembly in a second direction does not cause pivotal motion of the pivot arm.
18. A wheelchair suspension comprising:

a frame having first and second sides;

first and second pivoting assemblies coupled to the first and second sides of the frame, each pivoting assembly comprising:

a pivot arm pivotally coupled to the frame and having a first engagement surface;

a drive assembly pivotally coupled to the frame and having a second engagement surface configured to engage the first engagement surface; and wherein the second engagement surface is configured to disengage from the first engagement surface upon pivotal movement of the drive assembly in a first direction.
19. The suspension of claim 18 wherein the first engagement surface comprises at least a partially undulating surface.
20. The suspension of claim 19 wherein the second engagement surface comprises a shape configured to be at least partially seated within the at least partially undulating surface.
CA2463296A 2001-10-19 2002-09-20 Wheelchair suspension having pivotal motor mount Expired - Fee Related CA2463296C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/044,826 2001-10-19
US10/044,826 US7066290B2 (en) 2001-10-19 2001-10-19 Wheelchair suspension having pivotal motor mount
PCT/US2002/029996 WO2003034969A1 (en) 2001-10-19 2002-09-20 Wheelchair suspension having pivotal motor mount

Publications (2)

Publication Number Publication Date
CA2463296A1 true CA2463296A1 (en) 2003-05-01
CA2463296C CA2463296C (en) 2010-09-14

Family

ID=21934543

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2463296A Expired - Fee Related CA2463296C (en) 2001-10-19 2002-09-20 Wheelchair suspension having pivotal motor mount

Country Status (10)

Country Link
US (3) US7066290B2 (en)
EP (2) EP1435889B1 (en)
AT (1) ATE521319T1 (en)
AU (1) AU2002341764B2 (en)
CA (1) CA2463296C (en)
DK (1) DK1435889T3 (en)
ES (1) ES2372479T3 (en)
HK (1) HK1069304A1 (en)
PT (1) PT1435889E (en)
WO (1) WO2003034969A1 (en)

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US20060249317A1 (en) 2006-11-09
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