SE504915C2 - Drive ring arrangement for manually driven wheelchair - Google Patents

Drive ring arrangement for manually driven wheelchair

Info

Publication number
SE504915C2
SE504915C2 SE9600155A SE9600155A SE504915C2 SE 504915 C2 SE504915 C2 SE 504915C2 SE 9600155 A SE9600155 A SE 9600155A SE 9600155 A SE9600155 A SE 9600155A SE 504915 C2 SE504915 C2 SE 504915C2
Authority
SE
Sweden
Prior art keywords
drive ring
elastic material
material layer
core
ring
Prior art date
Application number
SE9600155A
Other languages
Swedish (sv)
Other versions
SE9600155L (en
SE504915C3 (en
SE9600155D0 (en
Inventor
Karl-Olof Niklasson
Original Assignee
Karl Olof Niklasson
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 Karl Olof Niklasson filed Critical Karl Olof Niklasson
Priority to SE9600155A priority Critical patent/SE504915C2/en
Publication of SE9600155D0 publication Critical patent/SE9600155D0/en
Publication of SE9600155L publication Critical patent/SE9600155L/en
Publication of SE504915C3 publication Critical patent/SE504915C3/en
Publication of SE504915C2 publication Critical patent/SE504915C2/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/02Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • A61G5/028Special adaptations or provisions on hand rim, e.g. for facilitating gripping

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Sealing Devices (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The drive ring (2) has a different lesser diameter than the wheelchair travel wheel (5) and a coating (6) of rubber or other elastic material encloses a core (8) in the interior (7) of the drive ring. The drive ring elastic material layer (9A,9B) is thicker (T,t) on the drive ring outside (U) than on its inside (I). The ring-shaped core in the drive ring is enclosed by an elastic material layer (9A) rotatably connected at least around its outside. The elastic material layer has a thickness (TE) which is greater on its upwardly turned side (0), viewed in a radial direction, than on the drive ring inside, viewed in an axial direction. The elastic material layer (9), which consists of yeast, cellular rubber, preferably natural rubber, with great friction encloses a core consisting of a tube.

Description

504 915 i Fig. 3 och 4 visar alternativa fastsättningar av drivring på hjul. 504 915 i Figs. 3 and 4 show alternative attachments of drive ring on wheels.

En anordning 1 vid en drivring 2, som är avsedd att monteras vid en manuellt driven rullstol 3 och som innefat- tar en sidledes 4 från rullstolens körhjul 5 förskjuten och med sagda körhjul 5 förbunden drivring 2, som uppvisar en från rull- stolskörhjulet 5 skild mindre diameter, har en beläggning 6 som bildas av gummi eller annat lämpligt elastiskt material, t.ex. plast, och som omsluter en i drivringens inre 7 belägen kärna 8.A device 1 at a drive ring 2, which is intended to be mounted on a manually driven wheelchair 3 and which includes takes a sideways 4 from the wheelchair 5's wheelchair 5 offset and with said drive wheel 5 connected to drive ring 2, which has a the chair drive wheel 5 different smaller diameter, has a coating 6 which formed of rubber or other suitable elastic material, e.g. plastic, and enclosing a core 8 located in the inner 7 of the drive ring.

Enligt föreliggande uppfinning är drivringens elastiska materi- alskikt 9A tjockare T pà drivringens utsida U än vad tjockleken t på det elastiska materialskiktet 9B är på drivringens insida I.According to the present invention, the elastic material of the drive ring is layer 9A thicker T on the outside U of the drive ring than the thickness t on the elastic material layer 9B is on the inside of the drive ring IN.

En ringformig kärna 8 i drivringen 2 omslutes av ett åtminstone kring dess utsida U vridbart anslutet elastiskt materialskikt 9A varigenom detta tillàtes att röra sig utmed drivringens omkrets, sett tvärs ringens omkrets i riktning av pilarna 10, 11.An annular core 8 in the drive ring 2 is enclosed by one elastically rotatably connected at least about its outside U. material layer 9A thereby allowing it to move along the circumference of the drive ring, seen across the circumference of the ring in the direction of arrows 10, 11.

Det övre elastiska materialskiktet 9C uppvisar en tjocklek TE som är större på dess uppåtvända sida O, sett i radiell riktning, än vad materialskiktets 9B tjocklek t är på drivringens insida I, sett i axiell riktning. Därigenom erhålles även ett utvändigt skikt 9A respektive 9C som medger stor slitstyrka.The upper elastic material layer 9C has a thickness TE which is greater on its upwardly facing side 0, seen in radial direction, than the thickness t of the material layer 9B is inside I of the drive ring, seen in the axial direction. Thereby is obtained also an outer layer 9A and 9C, respectively, which allows large durability.

Kärnan 8 kan antingen bildas av ett ringformigt rör av t.ex. aluminium, plast, stål etc. eller kan utgöras av en homogen ring av lämpligt material och det elastiska material- skiktet 9 utgöres lämpligen av just cellgummi, företrädesvis naturgummi som uppvisar stor friktion. Drivringen 2 fastsättes på rullstolshjulet 5 på känt sätt, antingen i hjulets ekrar 12 med hjälp av distanshållare 13, såsom visas i Fig. 2, eller med hjälp av bleck 14 som skruvas fast i hjulfälgen 15 och därtill anslutna distanshållare 13 såsom visas i Fig. 3, eller med skruv 19 som iskurvas ett på fälgen 15 fästat öra 20, som är ansluten till en till drivringens 2 inre kärna 8 ansluten nit 21 eller annan förbindning, såsom visas i Fig. 4. * ¿2so4 915 Drivringens 2 funktion är till för att brukaren ej skall behöva ta på däcket 5A, som kan vara smutsigt, utan endast på respektive till vardera rullstolshjulet 5 ansluten drivring. Sagda drivring har en diameter som är mindre än däck- ets diameter så att brukaren med respektive hand skall kunna greppa om eller slå på drivringen 2 och driva fram rullstolen.The core 8 can either be formed by an annular pipes of e.g. aluminum, plastic, steel, etc. or may consist of a homogeneous ring of suitable material and the elastic material the layer 9 is suitably made of cellular rubber, preferably natural rubber that exhibits great friction. The drive ring 2 is fixed on the wheelchair wheel 5 in a known manner, either in the spokes 12 of the wheel by means of spacer 13, as shown in Fig. 2, or by by means of plate 14 which is screwed into the wheel rim 15 and in addition connected spacers 13 as shown in Fig. 3, or with screw 19 which is curved into ice an ear 20 attached to the rim 15, which is connected to a rivet 21 or connected to the inner core 8 of the drive ring 2 other connection, as shown in Fig. 4. * ¿2so4 915 The function of the drive ring 2 is for the user should not have to touch the tire 5A, which can be dirty, but only on each to each wheelchair wheel 5 connected drive ring. Said drive ring has a diameter which is smaller than the tire diameter so that the user with each hand can grasp or turn on the drive ring 2 and propel the wheelchair forward.

Drivringen 2 har en konstruktion som gör det lättare för användaren att driva fram rullstolen, främst för de personer som uppvisar svagare handfunktion. För den skull är drivringens 2 utsida U, d.v.s. den sida där användaren placerar handen 21 för att påverka drivringen 2 och därigenom driva fram rullstolen, försedd med ett betydligt tjockare T materialskikt 9A än vad skiktet 9B hos drivringens 2 insida I uppvisar, d.v.s. den sidan I av drivringen 2 som är vänd in mot hjulet 5 och där fastsättningsmedel 13 för anslutning av sagda ring 2 till hjulet 5 befinner sig. Detta tunnare skikt 9B av drivringen är ej utsatt för speciellt slitage, varför tunnare tjocklek t är till- räcklig där.The drive ring 2 has a construction that does this easier for the user to propel the wheelchair, mainly for those people who show weaker hand function. For that reason is the outside U of the drive ring 2, i.e. the page where the user places hand 21 to actuate the drive ring 2 and thereby propel it forward the wheelchair, provided with a significantly thicker T material layer 9A than what the layer 9B of the inside I of the drive ring 2 shows, i.e. the side I of the drive ring 2 facing the wheel 5 and there fastening means 13 for connecting said ring 2 to the wheel 5 is located. This thinner layer 9B of the drive ring is not subjected to special wear, so thinner thickness t is enough there.

Anledning till att man nu anordnar betydligt tjockare materialskikt på drivringens 2 utsida U än insida I beror på att utsidan U utsättes för yttre åverkan samt slitage beroende på handflatans 21A friktion vid framdrivningen. Man kan nästan slå på drivringen 2 med handen uppifrån och ned och detta medför stor friktion av handen 21.Reason why you now organize significantly thicker material layer on the outside U of the drive ring 2 than inside I is due to the outside U being exposed to external damage and wear depending on the friction of the palm 21A during propulsion. You can almost turn on the drive ring 2 with your hand from top to bottom and this causes great friction of the hand 21.

Insidan I av drivringen 2 utsättes, som sagts, inte alls för speciellt stor förslitning och yttre påverkan utan kan lätt kommas åt med handen och dess fingrar när man önskar gripa om drivringen 2.The inside I of the drive ring 2 is exposed, as stated, not at all for particularly great wear and external influences but can be easily accessed with the hand and its fingers when desired grasp the drive ring 2.

Således uppnås stor teknisk effekt med hjälp av enkla men ändå väl fungerande tekniska medel, och uppfinningen är ej begränsad till ovan beskrivna och på ritningar visade utföringsexempel utan kan varieras inom ramen för patentkraven utan att uppfinningstanken frångàs.Thus, great technical effect is achieved with the help of simple yet well-functioning technical means, and the invention is not limited to those described above and shown in drawings embodiments but can be varied within the scope of the claims without departing from the spirit of the invention.

Claims (4)

504 9í5 P a t e n t k r a v504 9í5 P a t e n t k r a v 1. Anordning (1) vid drivring (2) för manuellt dri- ven rullstol (3) och som innefattar en sidledes (4) från rull- stolens körhjul (5) förskjuten och med detsamma förbunden driv- ring (2) som uppvisar en fràn rullstolskörhjulet (5) skild mindre diameter, och att en beläggning (6) av gummi eller annat elastiskt material omsluter en i drivringens inre (7) belägen kärna (8) kännetecknad därav, att drivringens elastiska materi- alskikt (9A respektive 9B) är tjockare (T; t) på drivringens utsida (U) än dess insida (I).Device (1) at drive ring (2) for manually driven wheelchair (3) and which comprises a side ring (2) displaced laterally (4) away from the wheelchair (5) and connected thereto which has a smaller diameter from the wheelchair driving wheel (5), and that a coating (6) of rubber or other elastic material encloses a core (8) located in the inner (7) of the drive ring, characterized in that the elastic material layers (9A and 9B) of the drive ring are thicker (T; t) on the outside (U) of the drive ring than its inside (I). 2. 4 Anordning enligt patentkrav 1, kännetecknad därav, att en ringformig kärna (8) i drivringen (2) omslutes av ett åtminstone kring dess utsida (U) vridbart anslutet elastiskt materialskikt (9A).Device according to claim 1, characterized in that an annular core (8) in the drive ring (2) is enclosed by an elastic material layer (9A) rotatably connected at least around its outside (U). 3. Anordning enligt patentkrav 2, kännetecknad därav, att det elastiska materialskiktet (9) uppvisar en tjock- lek (TE; t) som är större pà dess uppátvända sida (O), sett i radiell riktning, än på drivringens insida (I), sett i axiell riktning.Device according to claim 2, characterized in that the elastic material layer (9) has a thickness (TE; t) which is greater on its upwardly facing side (0), seen in the radial direction, than on the inside (I) of the drive ring. , seen in the axial direction. 4. Anordning enligt något av patentkraven 2-3, kännetecknad därav, att det elastiska materialskiktet (9) som utgöres av jäst, cellgummi, företrädesvis naturgummi, med stor friktion omsluter en kärna (8) som består av ett rör.Device according to one of Claims 2 to 3, characterized in that the elastic material layer (9), which consists of yeast, cellular rubber, preferably natural rubber, encloses a core (8) consisting of a tube with high friction.
SE9600155A 1996-01-16 1996-01-16 Drive ring arrangement for manually driven wheelchair SE504915C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9600155A SE504915C2 (en) 1996-01-16 1996-01-16 Drive ring arrangement for manually driven wheelchair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9600155A SE504915C2 (en) 1996-01-16 1996-01-16 Drive ring arrangement for manually driven wheelchair

Publications (4)

Publication Number Publication Date
SE9600155D0 SE9600155D0 (en) 1996-01-16
SE9600155L SE9600155L (en) 1997-05-26
SE504915C3 SE504915C3 (en) 1997-05-26
SE504915C2 true SE504915C2 (en) 1997-05-26

Family

ID=20401043

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9600155A SE504915C2 (en) 1996-01-16 1996-01-16 Drive ring arrangement for manually driven wheelchair

Country Status (1)

Country Link
SE (1) SE504915C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343662A (en) * 1996-10-07 2000-05-17 Jens Evling Dual friction wheelchair hand rim

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343662A (en) * 1996-10-07 2000-05-17 Jens Evling Dual friction wheelchair hand rim

Also Published As

Publication number Publication date
SE9600155L (en) 1997-05-26
SE9600155D0 (en) 1996-01-16

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