GB2428649A - Wheelchair movable on a staircase - Google Patents

Wheelchair movable on a staircase Download PDF

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Publication number
GB2428649A
GB2428649A GB0607879A GB0607879A GB2428649A GB 2428649 A GB2428649 A GB 2428649A GB 0607879 A GB0607879 A GB 0607879A GB 0607879 A GB0607879 A GB 0607879A GB 2428649 A GB2428649 A GB 2428649A
Authority
GB
United Kingdom
Prior art keywords
wheelchair
support post
pin
legs
pivotally mounted
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
GB0607879A
Other versions
GB2428649B (en
GB0607879D0 (en
Inventor
Lung-Ho Hsu
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.)
TOP LONGMAX PRODUCTS CO Ltd
Original Assignee
TOP LONGMAX PRODUCTS CO Ltd
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 TOP LONGMAX PRODUCTS CO Ltd filed Critical TOP LONGMAX PRODUCTS CO Ltd
Publication of GB0607879D0 publication Critical patent/GB0607879D0/en
Publication of GB2428649A publication Critical patent/GB2428649A/en
Application granted granted Critical
Publication of GB2428649B publication Critical patent/GB2428649B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A61G5/06—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
    • A61G5/061—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 for climbing stairs
    • 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
    • A61G5/06—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
    • A61G5/066—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 with endless belts
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/02—Accessories or details specially adapted for children's carriages or perambulators providing for travelling up or down a flight of stairs

Abstract

A wheelchair includes a chair body (1), two opposite track units (3) each pivotally mounted on the chair body, and two opposite support units (2) each pivotally mounted between the chair body and a respective one of the track units. Thus, the wheelchair is movable on a staircase by operation of the track units, thereby facilitating a user operating the wheelchair to move on a staircase.

Description

WHEELCHAIR MOVABLE ON A STAIRCASE
The present invention relates to a wheelchair and, more particularly, to a wheelchair that is movable on a staircase.
A conventional wheelchair comprises a chair body having a front portion provided with two front wheels and a rear portion provided with two rear wheels. Thus, the wheelchair is movable on the ground by the front wheels and the rear wheels. However, the wheelchair is not movable on a staircase, thereby limiting the versatility of the wheelchair.
The primary objective of the present invention is to provide a wheelchair that is movable on a staircase.
Another objective of the present invention is to provide a wheelchair, wherein the wheelchair is movable on a staircase by operation of the track units, thereby facilitating a user operating the wheelchair to move on a staircase, and thereby enhancing the versatility of the wheelchair.
A further objective of the present invention is to provide a wheelchair, wherein each of the armrests and each of the connecting members is pivotable about the respective first pin, and each of the front legs is pivotable about the respective second pin to fold the front legs and the rear legs to reduce the volume of the chair body of the wheelchair.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings: Fig. 1 is a perspective view of a wheelchair in accordance with the preferred embodiment of the present invention.
Fig. 2 is a locally enlarged plan cross-sectional view of the wheelchair as shown in Fig. 1.
Fig. 3 is a schematic operational view of the wheelchair as shown in Fig. 2.
Fig. 4 is a top plan cross-sectional view of the wheelchair in accordance with the preferred embodiment of the present invention.
Fig. 5 is a schematic operational view of the wheelchair as shown in Fig. 4.
Fig. 6 is a schematic operational view of the wheelchair as shown in Fig. 1.
Referring to the drawings and initially to Fig. 1, a wheelchair in accordance with the preferred embodiment of the present invention comprises a chair body 1, two opposite track units 3 each pivotally mounted on the chair body 1, and two opposite support units 2 each pivotally mounted between the chair body I and a respective one of the track units 3.
Referring to Figs. 1-3, the chair body 1 includes two opposite rear legs 13, two opposite front legs 12 pivotally connected with the rear legs 13, two opposite armrests 11 pivotally connected with the rear legs 13, and a seat frame 14 pivotally mounted between the front legs 12 and the rear legs 13.
Each of the armrests 11 has an end portion provided with a U-shaped connecting portion 110 pivotally mounted on a respective one of the rear legs 13 by a first pin 111, and the chair body 1 further includes two inverted U-shaped connecting members 113 each having a closed first end 1131 pivotally connected with the connecting portion 110 of a respective one of the armrests 11 by the first pin 111 and an open second end 1132 pivotally mounted on a respective one of the front legs 12 by a second pin 112.
Thus, as shown in Fig. 3, each of the armrests 11 and each of the connecting members 113 is pivotable about the respective first pin 111, and each of the front legs 12 is pivotable about the respective second pin 112 to fold the front legs 12 and the rear legs 13 to reduce the volume of the chair body 1.
As shown in Fig. 2, each of the front legs 12 has an upper end having a bottom side rested on the respective first pin 111 and a top side rested on the connecting portion 110 of a respective one of the armrests 11 so as to limit each of the front legs 12. Each of the front legs 12 has a lower end provided with a front wheel 121.
The chair body 1 further includes two extension bars 131 each adjustably mounted on the upper end of a respective one of the rear legs 13 by an adjusting member 137 to extend the length of each of the rear legs 13. Each of the rear legs 13 has a mediate portion provided with a pivot ear 133 pivotally mounted on a rear end of the seat frame 14 by a third pin 141, and the seat frame 14 has a mediate portion pivotally mounted on a respective one of the front legs 12 by a fourth pin 142. Each of the rear legs 13 has a lower provided with a rear shaft 135 for mounting a rear wheel 136. The chair body I further includes a transverse rod 134 mounted between the pivot ears 133 of the rear legs 13, and two connecting plates 15 each having a first end formed with a first hole 151 mounted on the rear shaft 135 of a respective one of the rear legs 13 and a second end formed with a second hole 152.
Referring to Figs. 1-5, each of the support units 2 includes a first support post 21 having a first end pivotally mounted on the transverse rod 134 so that the first support post 21 is pivotable about the transverse rod 134 and having a second end formed with a through hole 1324, a second support post 22 having a first end pivotally connected with the second end of the first support post 21 by a fifth pin 23 and formed with a first positioning hole 221, a protruding ear 220 mounted on a side of the second support post 22 and formed with a second positioning hole 222, a housing 132 mounted on the second end of the first support post 21 and having a bottom wall formed with a passage 1325, a positioning rod 1322 movably mounted in the housing 132 and having a first end extended through the through hole 1324 of the first support post 21 and detachably inserted into either one of the first positioning hole 221 of the second support post 22 and the second positioning hole 222 of the protruding ear 220, a mediate portion provided with a stop portion 1323 rested on the first support post 21 and a second end protruded outwardly from the passage 1325 of the housing 132, an elastic member 1321 mounted on the positioning rod 1322 and biased between the stop portion 1323 of the positioning rod 1322 and the bottom wall of the housing 132, and a pull bar 1327 rotatably mounted on the housing 132 and pivotally connected with the second end of the positioning rod l322byasixthpjn 1326.
Thus, when the second support post 22 is in line with the first support post 21 as shown in Fig. 6, the first positioning hole 221 of the second support post 22 is aligned with the through hole 1324 of the first support post 21 as shown in Fig. 4 to allow insertion of the first end of the positioning rod 1322.
On the contrary, when the second support post 22 is angled relative to the first support post 21 as shown in Fig. 1, the second positioning hole 222 of the protruding ear 220 is aligned with the through hole 1324 of the first support post 21 to allow insertion of the first end of the positioning rod 1322.
As shown in Fig. 5, the pull bar 1327 is pulled outwardly from the housing 132 and pivotable relative to the positioning rod 1322 about the sixth pin 1326 until an end portion 1328 of the pull bar 1327 is rested on the bottom wall of the housing 132, so that the positioning rod 1322 is pulled outwardly to detach the first end of the positioning rod 1322 from the first positioning hole 221 of the second support post 22.
Referring to Figs. 1 and 6, each of the track units 3 includes a front roller 31 pivotally mounted on the second hole 152 of a respective one of the connecting plates 15, a transverse bar 33 pivotally mounted on a second end of the second support post 22 of a respective one of the support units 2 so that the second support post 22 is pivotable about the respective transverse bar 33, a U-shaped main post 311 having a first end pivotally mounted on the transverse bar 33 and a second end mounted on the front roller 31, a U-shaped secondary post 321 adjustably mounted on the main post 311 by a threaded nut 34, a rear roller 32 mounted on the secondary post 321, and a track 35 mounted between the front roller 31 and the rear roller 32. The threaded nut 34 is used to adjust the tension of the track 35.
In operation, referring to Figs. 1-6, when each of the track units 3 is folded as shown in Fig. 1, the wheelchair is movable on the ground by the front wheels 121 and the rear wheels 136 of the chair body 1. At this time, the second support post 22 is angled relative to the first support post 21, and the second positioning hole 222 of the protruding ear 220 is aligned with the through hole 1324 of the first support post 21 to allow insertion of the first end of the positioning rod 1322, so that the first support post 21 and the second support post 22 are fixed by the positioning rod 1322.
On the contrary, when each of the track units 3 is expanded as shown in Fig. 6, the second support post 22 is in line with the first support post 21 as shown in Fig. 6, and the first positioning hole 221 of the second support post 22 is aligned with the through hole 1324 of the first support post 21 as shown in Fig. 4 to allow insertion of the first end of the positioning rod 1322, so that the first support post 21 and the second support post 22 are fixed by the positioning rod 1322. Thus, each of the track units 3 is expanded fully as shown in Fig. 6, so that the wheelchair is movable on a staircase by operation of the track units 3.
Accordingly, the wheelchair is movable on a staircase by operation of the track units 3, thereby facilitating a user operating the wheelchair to move on a staircase, and thereby enhancing the versatility of the wheelchair. In addition, each of the armrests 11 and each of the connecting members 113 is pivotable about the respective first pin 111, and each of the front legs 12 is pivotable about the respective second pin 112 to fold the front legs 12 and the rear legs 13 to reduce the volume of the chair body I of the wheelchair.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims (3)

1. A wheelchair, comprising: a chair body; two opposite track units each pivotally mounted on the chair body; two opposite support units each pivotally mounted between the chair body and a respective one of the track units.
2. The wheelchair in accordance with claim 1, wherein: the chair body includes two opposite rear legs, two opposite front legs pivotally connected with the rear legs, two opposite armrests pivotally connected with the rear legs, and a seat frame pivotally mounted between the front legs and the rear legs; each of the armrests has an end portion provided with a connecting portion pivotally mounted on a respective one of the rear legs by a first pin; the chair body further includes two connecting members each having a closed first end pivotally connected with the connecting portion of a respective one of the armrests by the first pin and an open second end pivotally mounted on a respective one of the front legs by a second pin; each of the rear legs has a mediate portion provided with a pivot ear pivotally mounted on a rear end of the seat frame by a third pin; the seat frame has a mediate portion pivotally mounted on a respective one of the front legs by a fourth pin; each of the rear legs has a lower provided with a rear shaft for mounting a rear wheel; the chair body further includes a transverse rod mounted between the pivot ears of the rear legs, and two connecting plates each having a first end formed with a first hole mounted on the rear shaft of a respective one of the rear legs and a second end formed with a second hole; each of the support units includes a first support post having a first end pivotally mounted on the transverse rod and a second end formed with a through hole, a second support post having a first end pivotally connected with the second end of the first support post by a fifth pin; each of the track units includes a front roller pivotally mounted on the second hole of a respective one of the connecting plates, a transverse bar pivotally mounted on a second end of the second support post of a respective one of the support units, a main post having a first end pivotally mounted on the transverse bar and a second end mounted on the front roller, a secondary post mounted on the main post, a rear roller mounted on the secondary post, and a track mounted between the front roller and the rear roller.
3. A wheeichair as ciaimed in Claim 2, in which the seat frame has a mediate portion pivotally mounted on a respective one of the front legs by a fourth pin. 13'
3. The wheelchair in accordance with claim 2, wherein each of the armrests and each of the connecting members is pivotable about the respective first pin, and each of the front legs is pivotable about the respective second pin to fold the front legs and the rear legs to reduce the volume of the chair body.
4. The wheelchair in accordance with claim 2, wherein each of the front legs has an upper end having a bottom side rested on the respective first pin and a top side rested on the connecting portion of a respective one of the arrnrests so as to limit each of the front legs.
5. The wheelchair in accordance with claim 2, wherein the first end of the second support post of each of the support units is formed with a first positioning hole, and each of the support units further includes a protruding ear mounted on a side of the second support post and formed with a second positioning hole, a housing mounted on the second end of the first support post and having a bottom wall formed with a passage, a positioning rod movably mounted in the housing and having a first end extended through the through hole of the first support post and detachably inserted into either one of the first positioning hole of the second support post and the second positioning hole of the protruding ear, a mediate portion provided with a stop portion rested on the first support post and a second end protruded outwardly from the passage of the housing, an elastic member mounted on the positioning rod and biased between the stop portion of the positioning rod and the bottom wall of the housing, and a pull bar rotatably mounted on the housing and pivotally connected with the second end of the positioning rod by a sixth pin.
6. The wheelchair in accordance with claim 5, wherein when the second support post is in line with the first support post, the first positioning hole of the second support post is aligned with the through hole of the first support post to allow insertion of the first end of the positioning rod.
7. The wheelchair in accordance with claim 5, wherein when the second support post is angled relative to the first support post, the second positioning hole of the protruding ear is aligned with the through hole of the first support post to allow insertion of the first end of the positioning rod.
8. The wheelchair in accordance with claim 5, wherein the pull bar is pulled outwardly from the housing and pivotable relative to the positioning rod about the sixth pin until an end portion of the pull bar is rested on the bottom wall of the housing, so that the positioning rod is pulled outwardly to detach the first end of the positioning rod from the first positioning hole of the second support post.
9. The wheelchair in accordance with claim 2, wherein the chair body 1 further includes two extension bars each adjustably mounted on the upper end of a respective one of the rear legs by an adjusting member to extend the length of each of the rear legs.
10. The wheelchair in accordance with claim 2, wherein the first support post of each of the support units is pivotable about the transverse rod.
11. The wheelchair in accordance with claim 2, wherein the second support post of each of the support units is pivotable about the respective transverse bar.
12. The wheelchair in accordance with claim 1, wherein the secondary post of each of the track units is adjustably mounted on the main post by a threaded nut.
13. The wheelchair in accordance with claim 1, wherein each of the front legs has a lower end provided with a front wheel.
14. A wheelchair substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Amendments to the claims have been filed as follows Claims:- 1. A wheelchair comprising:- a chair body which includes two opposite rear legs, two opposite front legs pivotally connected with the rear legs, two opposite armrests pivotally connected with the rear legs, and a seat frame pivotally mounted between the front and rear legs, two opposite track units each pivotally mounted on the chair body; and two opposite support units, each pivotally mounted between the chair body and a respective one of the track units, and in which each of the armrests has an end portion provided with a connecting portion pivotally mounted on a respective one of the rear legs by a first pin, and the chair body further includes two connecting members each having a first end pivotally connected with the connecting portion of a respective one of the armrests by the first pin and a second end pivotally mounted on a respective one of the front legs by a second pin.
2. A wheelchair as claimed in Claim 1, in which each of the rear legs has a mediate portion provided with a pivot ear pivotally mounted on a rear end of the seat frame by a third pin.
GB0607879A 2005-09-19 2006-04-21 A wheelchair that is movable on a staircase Expired - Fee Related GB2428649B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW094216089U TWM286664U (en) 2005-09-19 2005-09-19 An improved wheelchair

Publications (3)

Publication Number Publication Date
GB0607879D0 GB0607879D0 (en) 2006-05-31
GB2428649A true GB2428649A (en) 2007-02-07
GB2428649B GB2428649B (en) 2007-08-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB0607879A Expired - Fee Related GB2428649B (en) 2005-09-19 2006-04-21 A wheelchair that is movable on a staircase

Country Status (2)

Country Link
GB (1) GB2428649B (en)
TW (1) TWM286664U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473833A (en) * 2009-09-24 2011-03-30 Evac & Chair Internat Ltd A collapsible wheelchair with means to assist in movement over stairs
GB2501597A (en) * 2010-08-02 2013-10-30 Gerald David Morrish Evacuation chair
USD735092S1 (en) 2011-02-11 2015-07-28 Gerald David Morrish Evacuation chair
USD735093S1 (en) 2013-04-15 2015-07-28 Gerald David Morrish Evacuation chair
USD738795S1 (en) 2010-08-26 2015-09-15 Gerald David Morrish Evacuation chair
US20200354963A1 (en) * 2019-05-06 2020-11-12 Richard Hoffberg Wheelchair ramp

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135255A (en) * 1982-12-28 1984-08-30 Sunwa Sharyo Mfg Co Stair vehicle
FR2574740A1 (en) * 1984-12-18 1986-06-20 3 14 Applic Multiples Equipment making it possible to negotiate objects, intended for a wheelchair for a handicapped person
DE3913079A1 (en) * 1988-02-10 1990-10-25 Meimbresse Rudolf Wheelchair with endless track - which is mounted on a frame pivoted behind the chair backrest
GB2327643A (en) * 1997-07-30 1999-02-03 Michael Trainor Pushchair track attachment for ascending & descending stairs
US20030132585A1 (en) * 2002-01-14 2003-07-17 Way Christopher B. Stair chair
EP1532954A1 (en) * 2003-11-20 2005-05-25 Raffaele Grosso Device for handicapped people mobility

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135255A (en) * 1982-12-28 1984-08-30 Sunwa Sharyo Mfg Co Stair vehicle
FR2574740A1 (en) * 1984-12-18 1986-06-20 3 14 Applic Multiples Equipment making it possible to negotiate objects, intended for a wheelchair for a handicapped person
DE3913079A1 (en) * 1988-02-10 1990-10-25 Meimbresse Rudolf Wheelchair with endless track - which is mounted on a frame pivoted behind the chair backrest
GB2327643A (en) * 1997-07-30 1999-02-03 Michael Trainor Pushchair track attachment for ascending & descending stairs
US20030132585A1 (en) * 2002-01-14 2003-07-17 Way Christopher B. Stair chair
EP1532954A1 (en) * 2003-11-20 2005-05-25 Raffaele Grosso Device for handicapped people mobility

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473833A (en) * 2009-09-24 2011-03-30 Evac & Chair Internat Ltd A collapsible wheelchair with means to assist in movement over stairs
GB2501597A (en) * 2010-08-02 2013-10-30 Gerald David Morrish Evacuation chair
GB2501597B (en) * 2010-08-02 2014-02-19 Gerald David Morrish Evacuation chair
USD738795S1 (en) 2010-08-26 2015-09-15 Gerald David Morrish Evacuation chair
USD735092S1 (en) 2011-02-11 2015-07-28 Gerald David Morrish Evacuation chair
USD735093S1 (en) 2013-04-15 2015-07-28 Gerald David Morrish Evacuation chair
US20200354963A1 (en) * 2019-05-06 2020-11-12 Richard Hoffberg Wheelchair ramp
US11834838B2 (en) * 2019-05-06 2023-12-05 Richard Hoffberg Wheelchair ramp

Also Published As

Publication number Publication date
GB2428649B (en) 2007-08-15
TWM286664U (en) 2006-02-01
GB0607879D0 (en) 2006-05-31

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110421