EP0404574B1 - Rollstuhl - Google Patents

Rollstuhl Download PDF

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Publication number
EP0404574B1
EP0404574B1 EP90306802A EP90306802A EP0404574B1 EP 0404574 B1 EP0404574 B1 EP 0404574B1 EP 90306802 A EP90306802 A EP 90306802A EP 90306802 A EP90306802 A EP 90306802A EP 0404574 B1 EP0404574 B1 EP 0404574B1
Authority
EP
European Patent Office
Prior art keywords
engaging
frame member
strut
link
wheelchair
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.)
Expired - Lifetime
Application number
EP90306802A
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English (en)
French (fr)
Other versions
EP0404574A2 (de
EP0404574A3 (de
Inventor
Mark J. Quintile
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
Invacare Corp
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 Invacare Corp filed Critical Invacare Corp
Priority to EP94200726A priority Critical patent/EP0608964B1/de
Publication of EP0404574A2 publication Critical patent/EP0404574A2/de
Publication of EP0404574A3 publication Critical patent/EP0404574A3/de
Application granted granted Critical
Publication of EP0404574B1 publication Critical patent/EP0404574B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
    • 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
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • 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
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • 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
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/125—Rests specially adapted therefor, e.g. for the head or the feet for arms

Definitions

  • the present invention relates to wheelchairs.
  • the present invention relates to wheelchairs having reclinable seat backs.
  • the seat back panel is supported by a pair of side posts pivotally connected to the wheelchair chassis proximate to the rear edge of the seat bottom.
  • a telescoping strut is connected between the upper end of each side post and a point on the chassis. The struts elongate as the seat back is moved towards an upright position and contract as the seat back is reclined.
  • each strut comprises a tubular lower member pivotally connected to the chassis below and behind the seat bottom and a rod-shaped upper member pivotally connected to one of the side posts and received in the lower member.
  • the handles for the wheelchair are fixed to the upper ends of the upper strut members, which are rotatable about the strut axes.
  • the outer surface of the upper strut member received in the lower strut member has a longitudinally extending flat formed therein and includes threads formed over the remainder of its circumference. These threads mesh with a threaded engagement member brazed on the lower strut member to lock the seat back in a desired angular position relative to the seat bottom.
  • One object of the present invention is to provide a wheelchair with a reclining seat back that can be adjusted easily while the wheelchair is occupied.
  • the present invention also is intended to provide a reclining seat back with a release mechanism actuated in a manner that will naturally resist sudden downward movement of the seat back.
  • FR-A-2454800 discloses a wheelchair having a chassis supporting a substantially horizontal seat bottom and a reclining seat back assembly which comprises:
  • the wheelchair according to the present invention is characterised in that the said one end of said inner strut member is within said outer strut member and in that the first engaging surface on the inner strut member is adjacent the said one end thereof and has a toothed profile and the second engaging surface on the engaging member has a profile complementary to the first engaging surface.
  • the wheelchair may include means for urging the frame member to pivot towards the upright position.
  • the urging means preferably includes a lever arm fixed to the frame member at the proximal end thereof, an extendable link assembly including a first link member having a first end pivotally connected to the lever arm and a second link member having a second end pivotally connected to the chassis, and a spring connected between the first and second link members.
  • the first and second link members move relative to each other along a common link axis as the frame member is pivoted relative to the seat bottom, with the distance between the first end of the first link member and the second end of the second link member decreasing as the frame member is pivoted towards the upright position and increasing as the frame member is pivoted towards the reclined position.
  • the spring urges the first and second ends towards each other to urge the frame member towards the upright position.
  • a wheelchair 10 incorporates an embodiment of reclining seat back assembly.
  • Wheelchair 10 includes chassis 12, which, as shown in FIG. 2, includes left and right chassis halves 12A and 12B. Chassis halves 12A and 12B are interconnected in a parallel, spaced-apart relationship by a pair of cross braces (not shown). Wheelchair 10 is supported by a pair of driving wheels 14 and a pair of swivelable caster wheels 16. FIG. 1 shows only the left-side driving wheel 14 and caster wheel 16.
  • Each chassis half 12A, 12B includes lower chassis bar 18, which is substantially horizontal, and L-shaped upper chassis bar 20. Chassis bars 18 and 20 are connected together by vertical connecting bar 22. Lower chassis bar 18, upper chassis bar 20, and connecting bar 22 preferably are connected by welding to provide rigid chassis halves 12A and 12B.
  • Wheelchair 10 further includes a pair of seat support bars 24, each of which is mounted on the horizontal portion of upper chassis bar 20 of a respective chassis half 12A, 12B. Only one seat support bar 24 is shown in FIG. 1.
  • Wheelchair 10 also includes substantially horizontal seat bottom panel 26 connected between support bars 24.
  • Seat bottom panel 26 preferably is connected to seat support bars 24 by threaded fasteners 27.
  • Wheelchair 10 also includes a pair of C-shaped armrests 28, one of which is shown with phantom lines in FIG. 1.
  • Each chassis half 12A, 12B includes forward armrest socket 30 mounted on upper chassis bar 20 and rearward armrest socket 32 mounted on connecting bar 22. The ends of armrest 28 fit into and are supported by sockets 30 and 32.
  • Wheelchair 10 is provided with a reclining seat back assembly 34.
  • the reclining seat back assembly 34 includes frame member 36 having a proximal end 38 and a distal end 40. Proximal end 38 of frame member 36 is pivotally connected to chassis 12 proximate to seat bottom panel 26. With reference to FIG. 3, which shows the inside-facing portion of the right side of wheelchair 10, frame member 36 is pivotable relative to the horizontal seat bottom through a range of angles, from an upright position shown with solid lines to a reclined position shown with phantom lines.
  • frame member 36 preferably includes a pair of parallel, spaced-apart side posts 42, each of which includes a proximal end 44 and a distal end 46. Each proximal end 44 is pivotally connected to upper clevis 48 mounted atop connecting bar 22 of its respective chassis half 12A, 12B. Each side post 42 pivots about pivot pin 50 passing through upper clevis 48 and proximal end 44.
  • Frame member 36 also includes a handle 52 fixed to each side post 42 at distal end 46.
  • a handgrip 53 preferably formed of resilient foam rubber, is fitted over each handle 52 to provide greater comfort for the wheelchair attendant.
  • seat back panel 54 is connected between side posts 42. Seat back panel 54 preferably is fastened to side posts 42 by threaded fasteners 55.
  • wheelchair 10 preferably includes connecting bar 56 linking side posts 42 together.
  • Each side post 42 includes connector bracket 58 proximate handle 52.
  • Connector bar 56 is connected to connector brackets 58 by threaded knobs 60, only one of which is shown in FIG. 2.
  • Seat back assembly 34 includes at least one extendable strut 62 including a hollow outer strut member 64 and an inner strut member 66.
  • the lower end of outer strut member 64 is pivotally connected to chassis 12, and the upper end of inner strut member 66 is pivotally connected to frame member 36 proximate to distal end 40.
  • strut 62 contracts as frame member 36 is pivoted toward the reclined position and elongates as frame member 36 is pivoted toward the upright position.
  • seat back assembly 34 preferably includes a pair of struts 62.
  • Each outer strut member 64 has a lower end 68 pivotally connected to lower clevis 70 mounted on the rearward end of lower chassis bar 18.
  • Lower end 68 preferably is angled rearwardly from the remaining portion of outer strut member 68.
  • Upper end 72 of each inner strut member 66 is pivotally connected to distal end 46 of a side post 42. Specifically, each upper end 72 is pivotally connected via pin 76 to strut bracket 74 mounted on side post 42.
  • Lower end 78 of inner strut member 66 is received within outer strut member 64 through the open upper end 80 of outer strut member 64.
  • each inner strut member 66 has adjacent its lower end 78 a first engaging surface 82 with a toothed profile.
  • the toothed profile of first engaging surface 82 preferably comprises helical threads.
  • Each outer strut member 64 includes means for rotatably supporting a wheelchair driving wheel.
  • the wheel supporting means includes driving wheel bearings 83, one of which is fixed to each outer strut member 64 proximate its lower end 68, as shown in FIG. 1.
  • Bearings 83 rotatably support driving wheels 14 on outer strut members 64. Consequently, as frame member 36 is pivoted toward its reclined position, as shown in FIG. 3, driving wheels 14 move rearwardly to provide more secure support for the patient sitting in wheelchair 10.
  • Reclining seat back assembly 34 includes means for releasably locking frame member 36 at a desired angle relative to the seat bottom.
  • the locking means includes engaging member 84 movably mounted on each outer strut member 64.
  • Engaging member 84 includes second engaging surface 86 having a profile complementary to first engaging surface 82 of inner strut member 66.
  • Engaging member 84 preferably is a half nut with second engaging surface 86 comprising helical threads that mate with first engaging surface 82.
  • first and second engaging surfaces 82 and 86 can comprise a variety of complementary profiles other than helical threaded profiles.
  • Engaging member 84 is disposed within aperture 88 formed in the inwardly facing surface of each outer strut member 64 to permit engagement between engaging surfaces 82 and 86.
  • the locking means also includes means for biasing second engaging surface 86 of each engaging member 84 into engagement with first engaging surface 82 of its respective inner strut member 66 to prevent movement of inner strut members 66 relative to outer strut members 64, thereby locking frame member 36 at a desired angle.
  • the biasing means includes a pair of coil springs 90, each of which is contained within a spring housing 92 mounted on each outer strut member 64 and covering aperture 88. Spring housing 92 is secured to outer strut member 64 by mounting strap 94, bolts 96, and nuts 98. As shown in FIGS. 5 and 6, coil spring 90 is disposed between spring seat 100 of spring housing 92 and spring face 102 of engaging member 84.
  • the locking means of reclining seat back assembly 34 further includes a pair of actuating levers 104 pivotally mounted on frame member 36 at the distal end thereof. Specifically, each actuating lever 104 is pivotally connected to a lever bracket 106 fixed to distal end 46 of each side post 42 immediately beneath handle 52.
  • the locking means also includes means for linking actuating lever 104 to engaging member 84 so that pivoting actuating lever 104 in a preselected direction moves engaging member 84 against the biasing means of coil spring 90 to disengage first and second engaging surfaces 82, 86 and permit movement of inner strut members 66 relative to outer strut members 64.
  • the linking means includes a pair of Bowden cable assemblies 108.
  • Each Bowden cable assembly 108 includes a sheathed wire 110 having engaging lugs 112 and 113 at its upper and lower ends, respectively.
  • Each Bowden wire assembly 108 is connected to a respective side post 42 by straps 114.
  • Engaging lug 112 at the upper end of each Bowden cable assembly is connected to actuating lever 104, and the lower engaging lug 113 is connected to engaging member 84.
  • Actuating levers 104 and engaging members 84 are provided with slots to accommodate engaging lugs 112, 113.
  • Bowden cable assembly 108 also includes upper and lower ferrules 116 and 117, which are threaded into strut bracket 74 and spring housing 92, respectively. Ferrules 116, 117 preferably are secured in place by nuts 118.
  • each engaging lug 112 is displaced upwardly, which causes lower engaging lug 113 and connected engaging member 84 to be displaced away from inner strut member 66 (to the left as seen in FIGS. 5 and 6), thereby disengaging second engaging surface 86 from first engaging surface 82.
  • inner strut members 66 are released from the locking means and frame member 36 can be pivoted to the desired seat back angle.
  • springs 90 force engaging members 84 back into engagement with inner strut members 66, thereby relocking frame member 36.
  • actuating levers 104 can be located in a number of positions, it is preferred to position them immediately beneath handles 52 and to orient the Bowden cable assembly so that upward pivoting of levers 104 disengages engaging member 84.
  • the wheelchair attendant imparts an upward force on the seat back assembly when disengaging the locking means. Consequently, the attendant is better able to support the weight of the released seat back, which is particularly important when the wheelchair is occupied by a patient.
  • the reclining seat back assembly includes means for urging frame member 36 to pivot toward an upright position relative to the seat bottom.
  • the urging means includes a pair of lever arms 120, each of which is fixed to proximal end 44 of a side post 42.
  • lever arm 120 is T-shaped, with its cross arm perpendicular to side post 42. Each lever arm 120 extends beyond pivot pin 50 of its respective side post.
  • the urging means also includes an extendable link assembly 122.
  • link assembly 122 includes tubular first link member 124 and second tubular link member 126.
  • Second link member 126 has a smaller diameter than first link member 124, is received within first link member 124, and can slide axially with respect to first link member 124 along a link axis 128.
  • Affixed to the upper end of first link member 124 is connecting rod 130, which is pivotally connected to one end of the cross arm of lever arm 120 by pin 132.
  • lower end 134 of second link member 126 is pivotally connected to mounting lug 136 affixed to the underside of lower chassis bar 18 by pin 138.
  • FIG. 1 As shown in FIG.
  • first and second link members 124, 126 move relative to each other along link axis 128 as frame member 36 is pivoted between the upright position shown with solid lines and the reclined position shown with phantom lines.
  • the distance between connecting bar 130 at the upper end of first link member 124 and lower end 134 of second link member 126 decreases as frame member 36 is pivoted toward the upright position and increases as frame member 36 is pivoted toward the reclined position.
  • a spring is connected between first link member 124 and second link member 126 to urge contraction of link assembly 122 and urge frame member 36 toward the upright position.
  • the spring comprises coil tension spring 140, which has one end connected to pin 138 at lower end 134 and a second end connected to pin 142 at the upper end of first link member 124.
  • link assembly 122 includes first link member 143, which is comprised of piston rod 144 having is upper end pivotally connected to lever arm 120 by pin 146. Piston head 148 is fixed to the lower end of piston rod 144.
  • First link member 143 is slidably received within tubular second link member 150, which is pivotally connected at its lower end to mounting lug 136 by pin 152.
  • stopper member 154 Surrounding piston rod 144 at the upper end of second link member 150 is stopper member 154, which serves as a spring support for compression coil spring 156, which spirals around piston rod 144 between stopper member 154 and the underside of piston head 148. Spring 156 urges piston head 148 towards the lower end of second link member 150, which in turn urges the seat back assembly towards the upright position.
  • lever arm 120 is substantially T-shaped and is connected to the upper end of link assembly 122 at a position spaced forwardly from a plane passing through side post 42.
  • the preferred shape shown in the drawings enables use of the same lever arm on either the right or left side post.
  • L-shaped lever arms also can be used to achieve the same leverage effect as shown in the drawings.
  • a straight lever arm can be used.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (15)

  1. Rollstuhl mit einem Fahrgestell (12), das eine im wesentlichen horizontale Sitzfläche (26) und eine zurückneigbare Rücklehnenanordnung (34) aufweist, mit den folgenden Merkmalen:
    a. ein Rahmenteil (36), mit einem nächstgelegenen Ende (38), das schwenkbar mit dem Fahrgestell (12) nahe der Sitzfläche (26) verbunden ist, wobei das genannte Rahmenteil (36) relativ zur Sitzfläche über einem Bereich von Winkeln schwenkar ist;
    b. eine verlängerbare Strebe (62) mit einem hohlen, äußeren Strebenteil (64) und einem inneren Strebenteil (66), wobei das genannte äußere Strebenteil (64) ein offenes Ende aufweist, durch welches ein Ende des genannten inneren Strebenteils (66) aufgenommen ist, wobei das eine Ende (68) der genannten Strebe (62) schwenkbar mit dem Fahrgestell (12) und das andere Ende (72) der genannten Strebe (62) schwenkbar mit dem Rahmenteil (36) an dessen abgelegenem Ende (46) verbunden ist und wobei das genannte innere Strebenteil (66) relativ zum genannten äußeren Strebenteil (64) verschieblich ist, wenn das genannte Rahmenteil (36) relativ zur Sitzfläche (26) geschwenkt wird; und
    c. eine Einrichtung zum lösbaren Verriegeln des genannten Rahmenteils (36) bei einem gewünschten Winkel relativ zur genannten Sitzfläche (26), wobei die genannte Verriegelungseinrichtung die folgenden Merkmale aufweist:
       ein Eingriffsteil (84), das beweglich am genannten äußeren Strebenteil (64) angebracht ist und eine zweite Eingriffsfläche (86) zum Eingriff mit einer ersten Eingriffsfläche (82) am genannten inneren Strebenteil (66) aufweist,
       eine Einrichtung (90), die die genannten Eingriffsflächen (82, 86) zum gegenseitigen Eingriff hin belastet, um die Bewegung der genannten Strebenteile (64, 66) relativ zueinander zu verhindern,
       eine Betätigungseinrichtung (104), die am genannten Rahmenteil (36) an dessen abgelegenem Ende (40) angebracht ist, und
       eine Einrichtung (108), die die genannte Betätigungseinrichtung (104) mit dem genannten Eingriffsteil (84) so koppelt, daß die Bewegung der genannten Betätigungseinrichtung (104) das genannte Eingriffsteil (84) gegen die genannte Belastungseinrichtung (90) bewegt, um den Eingriff der genannten Eingriffsfläche (82, 86) zu lösen und die Bewegung der genannten Strebenteile (64, 66) relativ zueinander zuzulassen;
       dadurch gekennzeichnet, daß das genannte eine Ende des inneren Strebenteils (66) innerhalb des genannten anderen Strebenteils (64) liegt und daß die erste Eingriffsfläche (82) am inneren Strebenteil (66) neben dessen einem Ende liegt und ein gezahntes Profil aufweist, und die zweite Eingriffsfläche (86) am Eingriffsteil (84) ein zur ersten Eingriffsfläche (82) komplementäres Profil aufweist.
  2. Rollstuhl nach Anspruch 1, worin die genannte Profile der genannten ersten und zweiten Eingriffsflächen (82, 86) wendelförmige Gewindegänge aufweisen.
  3. Rollstuhl nach Anspruch 1 oder 2, worin das genannte äußere Strebenteil (64) eine zwischen seinen Enden angeordnete Öffnung (88) aufweist, und das genannte Eingriffsteil (84) innerhalb der genannten Öffnung (88) angebracht ist.
  4. Rollstuhl nach Anspruch 3, worin die genannte Verriegelungseinrichtung ferner ein Federgehäuse (92) aufweist, das die genannte Öffnung (88) abdeckt, und die genannte Belastungseinrichtung eine Schraubenfeder (90) umfaßt, die zwischen dem genannten Gehäuse (92) und dem genannten Eingriffsteil (84) angeordnet ist.
  5. Rollstuhl nach irgendeinem der Ansprüche 1 bis 4, worin die genannte Koppelungseinrichtung eine Bowdenzuganordnung (108) aufweist, die mit dem einen Ende (112) an der genannten Betätigungseinrichtung (104) und mit ihrem anderen Ende (113) am genannten Eingriffsteil (84) angesetzt ist.
  6. Rollstuhl nach irgendeinem der Ansprüche 1 bis 5, worin die genannte Rücklehnenanordnung (34) eine Rücklehnenplatte (54) aufweist, die am genannten Rahmenteil (36) angebracht ist.
  7. Rollstuhl nach irgendeinem vorangehenden Anspruch, der ein Paar drehbarer Antriebsräder (14) aufweist und bei dem das Rahmenteil (36) ein Paar im wesentlichen paralleler Seitenpfosten (42) aufweist, die schwenkbar mit dem genannten Fahrgestell (12) verbunden ist, wobei jeder der genannten Seitenpfosten (42) mit einem Griff (53) versehen ist, der sich im wesentlichen rechtwinklig hiervon an dessen abgelegenem Ende (46) erstreckt; die Rücklehnenanordnung (34) ein Paar verlängerbarer Streben (62) aufweist; die genannte Verriegelungseinrichtung ein Paar Eingriffsteile (84) umfaßt, von denen jedes am äußeren Strebenteil (64) der jeweiligen Strebe (62) angebracht ist; und die Rücklehnenanordnung (34) auch ein Paar Betätigungshebel (104) umfaßt, von denen jeder schwenkbar am jeweiligen Seitenpfosten (42) neben dessen jeweiligem Griff (53) angebracht ist.
  8. Rollstuhl nach Anspruch 7, worin die genannten Betätigungshebel (104) zu den Griffen (53) hin bewegt werden, um den Eingriff der genannten Eingriffsflächen (82, 86) zu lösen.
  9. Rollstuhl nach Anspruch 8, worin die genannten Betätigungshebel (104) an den genannten Seitenpfosten (42) unmittelbar unter den genannten Griffen (53) angebracht sind.
  10. Rollstuhl nach Anspruch 7, 8 oder 9, worin jedes der genannten äußeren Strebenteile (64) eine Einrichtung (83) umfaßt, die drehbar jeweils eines der genannten Antriebsräder (14) lagert.
  11. Rollstuhl nach Anspruch 1 bis 10, ferner mit einer Einrichtung (140 oder 156), um das genannte Rahmenteil (36) zu zwingen, in eine aufrechte Lage relativ zur Sitzfläche (26) zu schwenken.
  12. Rollstuhl nach Anspruch 11, worin die genannte Einrichtung, um das genannte Rahmenteil (36) zu zwingen, zur genannten aufrechten Lage hin zu schwenken, einen Hebelarm (120) umfaßt, der am genannten Rahmenteil (36) an dessen genanntem, nächstgelegenem Ende (38) befestigt ist, eine verlängerbare Koppelungsanordnung (122), die ein erstes Koppelglied (124 oder 143) umfaßt, das schwenkbar mit dem ersten Ende am genannten Hebelarm (120) angesetzt ist, sowie ein zweites Koppelglied (126 oder 150), das schwenkbar mit einem zweiten Ende am Fahrgestell (12) angesetzt ist, wobei das genannte erste und zweite Koppelglied (124 und 126 oder 143 und 150) sich relativ zueinander längs einer gemeinsamen Koppelungsachse bewegen, wenn das genannte Rahmenteil (36) relativ zur Sitzfläche (26) verschwenkt wird, wobei der Abstand zwischen den Enden der genannten Koppelungsanordnung (122) abnimmt, wenn das genannte Rahmenteil (36) zur genannten aufrechten Lage hin geschwenkt wird, oder zunimmt, wenn das genannte Rahmenteil (36) zur genannten geneigten Lage hin geschwenkt wird, sowie eine Feder (140 oder 156), die zwischen dem genannten ersten und zweiten Koppelglied (124 und 126 oder 143 und 150) angesetzt ist, wobei die genannte Feder die genannten Enden der genannten Koppelungsanordnung (122) aufeinander zu belastet, um das Rahmenteil (36) in seine aufrechte Lage zu drücken.
  13. Rollstuhl nach Anspruch 12, worin die genannte Feder eine Zugfeder (140) ist.
  14. Rollstuhl nach Anspruch 12, worin die genannte Feder eine Druckfeder (156) ist.
  15. Rollstuhl nach Anspruch 14, worin das genannte erste Koppelglied (143) eine Kolbenstange (144) mit einem Kolbenkopf (148) gegenüber dem genannten ersten Ende längs der genannten Koppelungsachse aufweist; das genannte zweite Koppelglied (150) einen Zylinder umfaßt, der eine Federhalterung (154) gegenüber dem genannten zweiten Ende längs der genannten Koppelungsachse aufweist; und die genannte Druckfeder (156) eine Schraubenfeder ist, die längs der genannten Koppelungsachse zwischen dem genannten Kolbenkopf (148) und der genannten Federhalterung (154) angeordnet ist.
EP90306802A 1989-06-21 1990-06-21 Rollstuhl Expired - Lifetime EP0404574B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94200726A EP0608964B1 (de) 1989-06-21 1990-06-21 Verstellbare Rückenlehne für einen Rollstuhl

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36964589A 1989-06-21 1989-06-21
US369645 1989-06-21

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP94200726A Division EP0608964B1 (de) 1989-06-21 1990-06-21 Verstellbare Rückenlehne für einen Rollstuhl
EP94200726.1 Division-Into 1994-03-22

Publications (3)

Publication Number Publication Date
EP0404574A2 EP0404574A2 (de) 1990-12-27
EP0404574A3 EP0404574A3 (de) 1991-10-30
EP0404574B1 true EP0404574B1 (de) 1994-10-26

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ID=23456310

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Application Number Title Priority Date Filing Date
EP90306802A Expired - Lifetime EP0404574B1 (de) 1989-06-21 1990-06-21 Rollstuhl
EP94200726A Expired - Lifetime EP0608964B1 (de) 1989-06-21 1990-06-21 Verstellbare Rückenlehne für einen Rollstuhl

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP94200726A Expired - Lifetime EP0608964B1 (de) 1989-06-21 1990-06-21 Verstellbare Rückenlehne für einen Rollstuhl

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EP (2) EP0404574B1 (de)
JP (1) JPH0337063A (de)
DE (2) DE69023251T2 (de)
FR (1) FR2648705B1 (de)
GB (2) GB2233221B (de)

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GB2295538B (en) * 1994-12-01 1998-01-14 Keymed Support apparatus
TW374017B (en) 1998-02-03 1999-11-11 Sunrise Medical Hhg Inc Seat back recliner kit for wheelchair
GB9911026D0 (en) * 1999-05-13 1999-07-14 Wilstead Ltd Wheelchair
KR100980902B1 (ko) 2002-05-16 2010-09-07 소니 주식회사 입력 방법 및 입력 장치
JP4644029B2 (ja) * 2005-04-28 2011-03-02 株式会社松永製作所 フットレストの取付け構造
CN210494426U (zh) 2019-05-08 2020-05-12 明门(中国)幼童用品有限公司 背靠调整机构及具有该机构的看护车

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US2792876A (en) * 1955-12-22 1957-05-21 Colson Corp Reclinable chair construction
SE391873B (sv) * 1974-10-15 1977-03-07 Landstingens Inkopscentral Stol med ett i olika vinkellegen lasbart ryggstod
DE2540054A1 (de) * 1975-09-09 1977-03-17 Everest & Jennings Verstellbare rueckenlehne fuer einen krankenstuhl
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DE8711762U1 (de) * 1987-08-30 1987-11-05 Kerstholt, Fritz, 5778 Meschede, De

Also Published As

Publication number Publication date
EP0404574A2 (de) 1990-12-27
GB2256132A (en) 1992-12-02
FR2648705B1 (fr) 1997-12-26
GB2256132B (en) 1993-03-10
FR2648705A1 (fr) 1990-12-28
GB2233221A (en) 1991-01-09
EP0404574A3 (de) 1991-10-30
DE69023251D1 (de) 1995-11-30
GB9215565D0 (en) 1992-09-02
EP0608964B1 (de) 1995-10-25
GB2233221B (en) 1993-03-03
JPH0337063A (ja) 1991-02-18
EP0608964A1 (de) 1994-08-03
DE69013586T2 (de) 1995-03-02
DE69023251T2 (de) 1996-04-04
GB9013865D0 (en) 1990-08-15
DE69013586D1 (de) 1994-12-01

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