WO2006029341A2 - Camber tube level - Google Patents

Camber tube level Download PDF

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Publication number
WO2006029341A2
WO2006029341A2 PCT/US2005/032203 US2005032203W WO2006029341A2 WO 2006029341 A2 WO2006029341 A2 WO 2006029341A2 US 2005032203 W US2005032203 W US 2005032203W WO 2006029341 A2 WO2006029341 A2 WO 2006029341A2
Authority
WO
WIPO (PCT)
Prior art keywords
level indicator
toe
track
camber tube
indicator according
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.)
Ceased
Application number
PCT/US2005/032203
Other languages
French (fr)
Other versions
WO2006029341B1 (en
WO2006029341A3 (en
Inventor
Philip H. Schreiber
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.)
Sunrise Medical HHG Inc
Original Assignee
Sunrise Medical HHG Inc
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 Sunrise Medical HHG Inc filed Critical Sunrise Medical HHG Inc
Priority to DE602005022216T priority Critical patent/DE602005022216D1/en
Priority to EP05795517A priority patent/EP1809532B1/en
Publication of WO2006029341A2 publication Critical patent/WO2006029341A2/en
Publication of WO2006029341A3 publication Critical patent/WO2006029341A3/en
Anticipated expiration legal-status Critical
Publication of WO2006029341B1 publication Critical patent/WO2006029341B1/en
Ceased 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
    • A61G5/10—Parts, details or accessories
    • 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
    • A61G5/1097—Camber- or toe-adjusting means for the drive wheels
    • 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

Definitions

  • This invention relates in general to land vehicles and more particularly, to personal mobility vehicles. Most particularly, the invention relates to wheelchairs having camber tubes for supporting manually driven wheels.
  • Manual, or non-powered, wheelchairs typically comprise a seating surface, a backrest, and a wheelchair frame that is supported by rear wheels, and front casters. Wheelchairs often incorporate a number of adjustments that allow the wheelchair to be customized to fit a particular user size.
  • manual wheelchairs provide a height adjustment in the rear wheels and/or the front casters.
  • the rear wheels of the wheelchair may be cambered, or angled, with respect to a vertical plane.
  • a wheelchair with a large camber angle has more responsive turning, which is beneficial in sports applications.
  • a wheelchair with little to no camber angle has a smaller overall width and thus greater maneuverability in tight confines.
  • a horizontal or vertical reference plane is provided on the camber tube to indicate when the camber angle is aligned horizontally.
  • a horizontal reference plane is provided, a user would hold a bubble level on this surface and rotate the camber tube until the plane is level.
  • a vertical reference plane is provided, a user would hold a 90-degree angle between the reference plane and the ground and rotate the camber tube until the plane is vertical.
  • US Patent 4,852,899 discloses the use of a spirit or bubble level that is permanently mounted to the top of a camber tube. This invention facilitates toe-in and toe-out adjustment, wherein the user rotates the camber tube until the bubble level is centered.
  • the seating surface blocks the user's view of the bubble level. This makes the invention awkward to use, particularly when the camber tube is situated very close to the seating surface.
  • camber tube level indicator that can be viewed easily from the side of the wheelchair or from below.
  • the present invention is directed towards a level that meets the foregoing needs.
  • the level on a wheelchair comprises a ball encased in a curved track.
  • the curve track is formed in a clear housing that mounts to the underside of a wheelchair camber tube or wheel axle.
  • the camber tube or wheel axle is rotated until the ball aligns with an indicator mark indicating that toe-in/out has been eliminated from the cambered wheels.
  • FIG. 1 is a front perspective view of a portion of a wheelchair having a camber tube, and a camber tube level according to the invention.
  • Fig. 2A is a side elevational view of the camber tube and the camber tube level shown in Fig. 1.
  • Fig. 2B is a front elevational view of the camber tube and the camber tube level shown in Fig. 2A.
  • FIG. 3 A is a side elevational view of a camber tube and a camber tube level according to another embodiment of the invention.
  • Fig. 3B is a front elevational view of the camber tube and the camber tube level shown in Fig. 3 A.
  • Fig. 4A is a side elevational view of a camber tube and a camber tube level according to still another embodiment of the invention.
  • Fig. 4B is a front elevational view of the camber tube and the camber tube level shown in Fig. 4A.
  • Fig. 5A is a side elevational view of a camber tube and a camber tube level according to yet another embodiment of the invention.
  • Fig. 5B is a front elevational view of the camber tube and the camber tube level shown in Fig. 5A.
  • a camber tube level indicator or level 10 comprising a housing 12 that is adapted to be mounted to a rear wheel axle or camber tube 14 of a wheelchair.
  • the housing 12 is preferably a clear plastic housing, which is adapted to be mounted to an underside 14a of the camber tube 14.
  • the camber tube 14 can be mounted to the wheelchair in any suitable manner; such as by iising one or more clamps, such as the clamps 16 shown. The clamps 16 shown, when loosened, permit the camber tube 14 to be rotated about the axis Al of the camber tube 14.
  • the housing 12 of the illustrated embodiment has an internal curved or curved shaped track 12a, as shown in Fig. 2A.
  • a material or object such as cylindrical or spherical ball 18 or other rolling device, is adapted to rest upon the track 12a, and may freely roll or travel to the lowest position on the track 12a due to gravity.
  • the track 12a is of preferably a substantially constant radius R, with the axis A2 of the radius R being parallel with the axis Al of the camber tube 14.
  • the housing 12 preferably has a center mark 12b that is adapted to align with the location of the ball 18 along the track 12a when the camber tube 14 is oriented horizontally.
  • the curved track 12a preferably has a radius R that is sufficiently large to provide the level 10 with accuracy when making this adjustment.
  • the housing 12 is preferably designed so that the housing 12 can be easily installed on a camber tube 14.
  • the track 12a is preferably opened at a top of the track 12a so that the ball 18 may be captured between the housing 12 and the camber tube 14 when installed.
  • the track 12a and the camber tube 14 preferably cooperate to form a closed cavity 12d, where the ball 18 may reside inside the track 12a and not be easily contaminated by dust, fluids, or other contaminants.
  • the housing 12 may be mounted to the camber tube 14 using screws, bolts, pop rivets, adhesives, or other suitable fasteners or means.
  • the camber tube level 10 facilitates toe-in and toe-out adjustment by providing an easily viewable reference to indicate when the camber tube 14 has been rotated to a level position. No additional tools are required, and the level 10 may be easily viewed from the side or from below the wheelchair. This is particularly advantageous, considering that a wheelchair is most frequently set on a level workbench or table when adjustments are made.
  • the camber tube level 10 can be provided with the wheelchair, pre-installed on the camber tube 14, or it can be sold as an after market add-on feature that can be sized for standard camber tube diameters.
  • FIGs. 3A and 3B Another embodiment of the invention is shown in Figs. 3A and 3B, wherein a housing 20 is provided with a slot 20a.
  • the housing 20 may be made from an opaque plastic.
  • the slot 20a may serve as a window through which to view the ball 18.
  • FIGs. 4A and 4B Still another embodiment of the invention is shown in Figs. 4A and 4B, wherein a curved glass vial 22 may be installed into a housing 24.
  • the housing 24 is preferably a plastic housing having a viewing window 24a.
  • the vial 22 may have a material, such as a ball 18 and/or a liquid 26 therein.
  • the liquid 26 may serve to dampen the motion of the ball 18 and allow the ball 18 to settle more quickly to the lowest position within the vial 22.
  • An indicator mark 24b may be provided on the housing 24 to show when the camber tube 14 is oriented horizontally or substantially horizontally.
  • the vial 28 preferably contains a material, such as two liquids 32, 34 that have different densities and thus do not intermix.
  • the less dense liquid 32 is preferably clear.
  • the more dense liquid 34 is preferably opaque.
  • the more dense liquid 34 is adapted to settle to a lowest point along the curved glass vial 28.
  • An indicator mark 28a is preferably on the vial 28 to show when the camber tube 14 is oriented horizontally or substantially horizontally.

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)

Abstract

A level on a wheelchair allows the cambered rear wheels to be easily adjusted to eliminate toe-in/toe-out. The level comprises a ball encased in a curved track. The curve track is formed in a clear housing that mounts to the underside of a wheelchair camber tube or wheel axle. The camber tube or wheel axle is rotated until the ball aligns with an indicator mark indicating that toe-in/out has been eliminated from the cambered wheels.

Description

CAMBER TUBE LEVEL
BACKGROUND OF INVENTION
[0001] This invention relates in general to land vehicles and more particularly, to personal mobility vehicles. Most particularly, the invention relates to wheelchairs having camber tubes for supporting manually driven wheels.
[0002] Manual, or non-powered, wheelchairs typically comprise a seating surface, a backrest, and a wheelchair frame that is supported by rear wheels, and front casters. Wheelchairs often incorporate a number of adjustments that allow the wheelchair to be customized to fit a particular user size. Typically, manual wheelchairs provide a height adjustment in the rear wheels and/or the front casters. The rear wheels of the wheelchair may be cambered, or angled, with respect to a vertical plane. A wheelchair with a large camber angle has more responsive turning, which is beneficial in sports applications. A wheelchair with little to no camber angle has a smaller overall width and thus greater maneuverability in tight confines.
[0003] When an adjustment is made to the rear wheel height or front caster height on a wheelchair with cambered wheels, the rear wheels will toe-in or toe-out. That is to say, the rear wheels become misaligned with respect to horizontal. This misalignment is undesirable because it increases rolling friction. If the rear wheels are raised or the front casters are lowered, the rear wheels will toe-in. Conversely, if the rear wheels are lowered or the front casters are raised, the rear wheels will toe-out. This occurs because the axis of the camber is no longer aligned horizontally. To correct this misalignment the camber tube must be rotated about its axis in order to re-align the camber angle with respect to horizontal. Typically, a horizontal or vertical reference plane is provided on the camber tube to indicate when the camber angle is aligned horizontally. When a horizontal reference plane is provided, a user would hold a bubble level on this surface and rotate the camber tube until the plane is level. When a vertical reference plane is provided, a user would hold a 90-degree angle between the reference plane and the ground and rotate the camber tube until the plane is vertical. Such an adjustment is difficult because it requires additional tools and several hands to perform the operation. US Patent 4,852,899 discloses the use of a spirit or bubble level that is permanently mounted to the top of a camber tube. This invention facilitates toe-in and toe-out adjustment, wherein the user rotates the camber tube until the bubble level is centered. However, because the bubble level is on top of the camber tube, the seating surface blocks the user's view of the bubble level. This makes the invention awkward to use, particularly when the camber tube is situated very close to the seating surface.
[0004] What is needed is a camber tube level indicator that can be viewed easily from the side of the wheelchair or from below.
SUMMARY OF INVENTION
[0005] The present invention is directed towards a level that meets the foregoing needs. The level on a wheelchair comprises a ball encased in a curved track. The curve track is formed in a clear housing that mounts to the underside of a wheelchair camber tube or wheel axle. The camber tube or wheel axle is rotated until the ball aligns with an indicator mark indicating that toe-in/out has been eliminated from the cambered wheels.
[0006] Various objects and advantages of this invention will become apparent to those skilled in the art from the following detailed description of the preferred embodiment, when read in light of the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
[0007] Fig. 1 is a front perspective view of a portion of a wheelchair having a camber tube, and a camber tube level according to the invention.
[0008] Fig. 2A is a side elevational view of the camber tube and the camber tube level shown in Fig. 1. [0009] Fig. 2B is a front elevational view of the camber tube and the camber tube level shown in Fig. 2A.
[0010] Fig. 3 A is a side elevational view of a camber tube and a camber tube level according to another embodiment of the invention.
[0011] Fig. 3B is a front elevational view of the camber tube and the camber tube level shown in Fig. 3 A.
[0012] Fig. 4A is a side elevational view of a camber tube and a camber tube level according to still another embodiment of the invention.
[0013] Fig. 4B is a front elevational view of the camber tube and the camber tube level shown in Fig. 4A.
[0014] Fig. 5A is a side elevational view of a camber tube and a camber tube level according to yet another embodiment of the invention.
[0015] Fig. 5B is a front elevational view of the camber tube and the camber tube level shown in Fig. 5A.
DETAILED DESCRIPTION
[0016] Referring now to the drawings, there is illustrated in Figs. 1, 2A and 2B there is illustrated a camber tube level indicator or level 10 comprising a housing 12 that is adapted to be mounted to a rear wheel axle or camber tube 14 of a wheelchair. The housing 12 is preferably a clear plastic housing, which is adapted to be mounted to an underside 14a of the camber tube 14. The camber tube 14 can be mounted to the wheelchair in any suitable manner; such as by iising one or more clamps, such as the clamps 16 shown. The clamps 16 shown, when loosened, permit the camber tube 14 to be rotated about the axis Al of the camber tube 14. The housing 12 of the illustrated embodiment has an internal curved or curved shaped track 12a, as shown in Fig. 2A. A material or object, such as cylindrical or spherical ball 18 or other rolling device, is adapted to rest upon the track 12a, and may freely roll or travel to the lowest position on the track 12a due to gravity. The track 12a is of preferably a substantially constant radius R, with the axis A2 of the radius R being parallel with the axis Al of the camber tube 14. The housing 12 preferably has a center mark 12b that is adapted to align with the location of the ball 18 along the track 12a when the camber tube 14 is oriented horizontally. To make toe-in and toe-out adjustments, a user could rotate the camber tube 14 within the clamps 16 until the ball 18 rolls or travels and settles in a position coincident with the center mark 12b. The curved track 12a preferably has a radius R that is sufficiently large to provide the level 10 with accuracy when making this adjustment.
[0017] The housing 12 is preferably designed so that the housing 12 can be easily installed on a camber tube 14. The track 12a is preferably opened at a top of the track 12a so that the ball 18 may be captured between the housing 12 and the camber tube 14 when installed. The track 12a and the camber tube 14 preferably cooperate to form a closed cavity 12d, where the ball 18 may reside inside the track 12a and not be easily contaminated by dust, fluids, or other contaminants. The housing 12 may be mounted to the camber tube 14 using screws, bolts, pop rivets, adhesives, or other suitable fasteners or means.
[0018] The camber tube level 10 facilitates toe-in and toe-out adjustment by providing an easily viewable reference to indicate when the camber tube 14 has been rotated to a level position. No additional tools are required, and the level 10 may be easily viewed from the side or from below the wheelchair. This is particularly advantageous, considering that a wheelchair is most frequently set on a level workbench or table when adjustments are made. The camber tube level 10 can be provided with the wheelchair, pre-installed on the camber tube 14, or it can be sold as an after market add-on feature that can be sized for standard camber tube diameters. [0019] Another embodiment of the invention is shown in Figs. 3A and 3B, wherein a housing 20 is provided with a slot 20a. The housing 20 may be made from an opaque plastic. The slot 20a may serve as a window through which to view the ball 18.
[0020] Still another embodiment of the invention is shown in Figs. 4A and 4B, wherein a curved glass vial 22 may be installed into a housing 24. The housing 24 is preferably a plastic housing having a viewing window 24a. The vial 22 may have a material, such as a ball 18 and/or a liquid 26 therein. The liquid 26 may serve to dampen the motion of the ball 18 and allow the ball 18 to settle more quickly to the lowest position within the vial 22. An indicator mark 24b may be provided on the housing 24 to show when the camber tube 14 is oriented horizontally or substantially horizontally.
[0021] Yet another embodiment of the invention is shown in Figs. 5 A and 5B, wherein a vial 28, which is preferably a curved glass vial, is installed into a housing 30, which is preferably a plastic housing with a viewing window 30a. The vial 28 preferably contains a material, such as two liquids 32, 34 that have different densities and thus do not intermix. The less dense liquid 32 is preferably clear. The more dense liquid 34 is preferably opaque. The more dense liquid 34 is adapted to settle to a lowest point along the curved glass vial 28. An indicator mark 28a is preferably on the vial 28 to show when the camber tube 14 is oriented horizontally or substantially horizontally.
[0022] The principle and mode of operation of this invention have been explained and illustrated in its preferred embodiment. However, it must be understood that this invention may be practiced otherwise than as specifically explained and illustrated without departing from its spirit or scope.

Claims

CLAIMS What is claimed is:
1. A level indicator that mounts to a wheelchair camber tube or rear wheel axle comprising a track and a ball, wherein the ball is adapted to travel along the track and settle to a given low point on the track due to gravity.
2. The level indicator according to claim 1, wherein the track has a curved shape.
3. A level indicator that mounts to a wheelchair camber tube or rear wheel axle comprising a track and a displaceable element that is adapted to travel along the track and settle to a given low point on the track due to gravity.
4. The level indicator according to claim 2, wherein the track has a curved shape.
5. The level indicator according to claim 4, wherein the housing has a center mark that is aligned with the displaceable element when the camber tube is aligned correctly to eliminate toe-in or toe-out.
6. The level indicator according to claim 4, wherein the track is contained within a clear or translucent housing that permits viewing of the position of the displaceable element within the housing.
7. The level indicator according to claim 6, wherein the housing has a center mark that is aligned with the displaceable element when the camber tube is aligned correctly to eliminate toe-in or toe-out.
8. The level indicator according to claim 4, wherein the track is contained within a housing that has an area that is provided to view the position of the displaceable element within the housing.
9. The level indicator according to claim 8, wherein the housing has a center mark that is aligned with the displaceable element when the camber tube is aligned correctly to eliminate toe-in or toe-out.
10. The level indicator according to claim 1, wherein the track has a V- shape with a bottom serving as the low point of the track.
11. A level indicator that mounts to the underside of a wheelchair camber tube or rear wheel axle comprising a clear vial containing a material that resides inside the vial, wherein the material is adapted to travel inside the vial and settle to a given low point on the vial due to gravity.
12. The level indicator according to claim 11, further comprising a center mark that is aligned with the material when the camber tube is aligned correctly to eliminate toe-in/ toe-out.
13. The level indicator according to claim 11, wherein the vial is filled with liquid that is provided to dampen the travel of the material, so as to allow the material to settle quickly to a given low point.
14. The level indicator according to claim 13, further comprising a center mark that is aligned with the material when the camber tube is aligned correctly to eliminate toe-in/ toe-out.
15. The level indicator according to claim 11, wherein the material is a ball.
16. The level indicator according to claim 11, wherein the material is a liquid.
17. A level indicator that mount to a wheelchair camber tube or rear wheel axle comprising a clear vial containing two liquids of differing density that do not intermix, one liquid being clear in appearance and the other liquid being opaque in appearance, wherein the denser liquid settles to a given low point along the vial due to gravity.
18. The level indicator according to claim 17, further comprising a center mark that is aligned with the ball or heavier liquid when the camber tube is aligned correctly to eliminate toe-in/ toe-out.
PCT/US2005/032203 2004-09-09 2005-09-08 Camber tube level Ceased WO2006029341A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE602005022216T DE602005022216D1 (en) 2004-09-09 2005-09-08 FALL PIPE WATER LEVEL
EP05795517A EP1809532B1 (en) 2004-09-09 2005-09-08 Camber tube level

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US60831104P 2004-09-09 2004-09-09
US60/608,311 2004-09-09
US11/218,450 US7249777B2 (en) 2004-09-09 2005-09-02 Camber tube level
US11/218,450 2005-09-02

Publications (3)

Publication Number Publication Date
WO2006029341A2 true WO2006029341A2 (en) 2006-03-16
WO2006029341A3 WO2006029341A3 (en) 2007-03-01
WO2006029341B1 WO2006029341B1 (en) 2007-04-19

Family

ID=35995437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/032203 Ceased WO2006029341A2 (en) 2004-09-09 2005-09-08 Camber tube level

Country Status (4)

Country Link
US (1) US7249777B2 (en)
EP (1) EP1809532B1 (en)
DE (1) DE602005022216D1 (en)
WO (1) WO2006029341A2 (en)

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GB2434778A (en) * 2006-02-06 2007-08-08 Michael Jeffrey Spindle Wheelchair with adjustable ride height
US8042824B2 (en) * 2006-11-29 2011-10-25 Jaimie Borisoff Wheel mount assembly
USD589411S1 (en) * 2007-09-12 2009-03-31 Pdg Inc. Wheelchair member
US8002300B2 (en) * 2007-09-28 2011-08-23 Tisport, Llc Rear wheel mounting assembly for a wheelchair
US20100038880A1 (en) * 2008-08-15 2010-02-18 Bagg Christian Peter Edward Modular and/or configurable wheelchair apparatus
USD627271S1 (en) * 2009-02-03 2010-11-16 Sunrise Medical Hhg, Inc. Wheelchair frame
USD682748S1 (en) * 2009-09-28 2013-05-21 Gregor Horacek Wheelchair chassis
JP2014178273A (en) * 2013-03-15 2014-09-25 Topcon Corp Inclination angle detector
USD765565S1 (en) * 2015-04-29 2016-09-06 Royce Husted Frame tubes of a folding motorized chair
WO2017147704A1 (en) * 2016-03-01 2017-09-08 Motion Composites Inc A spacing bar of a wheelchair frame
GB2566482A (en) * 2017-09-14 2019-03-20 Poolpod Products Ltd Wheelchair
CA3168572C (en) 2022-07-13 2025-08-05 Invacare Corporation Wheelchair and suspension systems

Citations (1)

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Publication number Priority date Publication date Assignee Title
US4852899A (en) 1986-07-31 1989-08-01 Rainer Kueschall Lightweight wheelchair adjustable for a specific balance

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Publication number Priority date Publication date Assignee Title
US1730109A (en) * 1924-08-28 1929-10-01 Elbridge F Bacon Level
US2384453A (en) * 1943-02-06 1945-09-11 Ohio Thermometer Company Inclinometer
CH689177A5 (en) * 1997-12-23 1998-11-30 Kueschall Design Ag Wheelchair with a closed three-dimensional frame.

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US4852899A (en) 1986-07-31 1989-08-01 Rainer Kueschall Lightweight wheelchair adjustable for a specific balance

Also Published As

Publication number Publication date
EP1809532A4 (en) 2009-04-01
EP1809532B1 (en) 2010-07-07
WO2006029341B1 (en) 2007-04-19
WO2006029341A3 (en) 2007-03-01
DE602005022216D1 (en) 2010-08-19
EP1809532A2 (en) 2007-07-25
US20060049608A1 (en) 2006-03-09
US7249777B2 (en) 2007-07-31

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