EP2338456A1 - Verfahren zur Sicherung des Anhebebetriebs eines Rollstuhlsitzes und Anhebevorrichtung für einen Rollstuhl - Google Patents

Verfahren zur Sicherung des Anhebebetriebs eines Rollstuhlsitzes und Anhebevorrichtung für einen Rollstuhl Download PDF

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Publication number
EP2338456A1
EP2338456A1 EP09180467A EP09180467A EP2338456A1 EP 2338456 A1 EP2338456 A1 EP 2338456A1 EP 09180467 A EP09180467 A EP 09180467A EP 09180467 A EP09180467 A EP 09180467A EP 2338456 A1 EP2338456 A1 EP 2338456A1
Authority
EP
European Patent Office
Prior art keywords
lifting
lifting means
wheelchair seat
area
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.)
Withdrawn
Application number
EP09180467A
Other languages
English (en)
French (fr)
Inventor
Thomas Strothmann
Norbert Mesch
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 International SARL
Original Assignee
Invacare International SARL
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 International SARL filed Critical Invacare International SARL
Priority to EP09180467A priority Critical patent/EP2338456A1/de
Priority to PCT/IB2010/055977 priority patent/WO2011077369A1/en
Priority to EP16161671.9A priority patent/EP3053565A1/de
Priority to EP10813125.1A priority patent/EP2515820B9/de
Publication of EP2338456A1 publication Critical patent/EP2338456A1/de
Withdrawn legal-status Critical Current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
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat
    • 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
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10—Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/1063—Safety means
    • A61G7/1065—Safety means with electronic monitoring
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/36—General characteristics of devices characterised by sensor means for motion

Definitions

  • the present invention relates to a method for securitizing the lifting operation of a wheelchair seat and to a lifting device for a wheelchair seat.
  • the existing wheelchairs include specific means for easily adjusting the position of the seat.
  • One of these means consists for instance in an hinged structure arranged between the base body of the wheelchair and the seat.
  • Such a lifting means is revealed in the European Patent Application EP 1523971 .
  • the aim of the present invention is therefore to provide a method for securitizing the lifting operation of a wheelchair seat and a lifting device for a wheelchair seat avoiding such a problem.
  • the present invention is concerned with a method for securitizing the lifting operation of a wheelchair seat as claimed in claim 1. Important features of the method are defined in the dependent claims 2 to 4.
  • the present invention also concerns a lifting device for a wheelchair seat as claimed in claims 5 to 9.
  • This lifting device 1 comprises a lifting means 2 arranged between a lower frame 3 and an upper frame 4, said frames 3 and 4 having a rectangular form.
  • the lower frame 3 is intended to be connected to a base body of the wheelchair and the upper frame 4 is intended to be connected to the underneath face of the wheelchair seat.
  • the upper frame 4 supports also a mechanical structure defining an inclining device 5.
  • Said device 5 is intended to modify the inclination of the wheelchair seat.
  • Said lifting means 2 consists in a hinged structure defining a scissors joint with swing arms 6. In order to raise or lower the seat, one needs to push or pull one of the swing arms 6. This operation is done by an actuating means 7.
  • the actuating means 7 consists in a piston acting on said swing arm 6 via a connecting rod 8.
  • the activation of said actuating means 7 is controlled by a controller 9.
  • said controller 9 receives input command signals Ci from the user via an input command device 10.
  • Such a device 10 can consist in a keyboard or a joystick for instance.
  • said controller 9 receives also output signals Si from one or more sensors 11 configured to detect the thermal infrared radiation emitted by an area surrounding the lifting means 2.
  • said sensors 11 consist in thermopiles.
  • thermopile is a sensor which use a serially-interconnected array of thermocouples, each of which consists of two dissimilar materials with a large thermoelectric power and opposite polarities.
  • the thermocouples are placed across the hot and cold regions of a structure and the hot junctions are thermally isolated from the cold junctions.
  • the cold junctions are typically placed on a silicon substrate to provide effective heat sink.
  • In the hot regions there is a black body for absorbing the infrared radiation, which raises the temperature according to the intensity of the incident infrared radiation.
  • These thermopiles employ two different thermoelectric materials which are placed on a thin diaphragm having a low thermal conductance and capacitance. The temperature difference between the hot and cold regions generates a voltage, which is proportional to said difference of temperature.
  • the controller 9 when somebody penetrates into the surrounding area of the lifting means 2 via one of his body part, the thermal infrared radiations emitted by said area increase. Therefore, the sensors 11 generate a higher difference of temperature between the hot and cold regions and the voltage S1 generated by the sensors 11 is different from the voltage S0 generated by the sensors 11 before the body part penetrates inside said area.
  • the comparison between said voltage S1 and said reference voltage S0 is done continuously by the controller 9 so that it can detect at any time the presence of a hot body inside the surveillance area of the sensors 11. Therefore, when the controller 9 detects that the voltage S1 is different from the voltage S0, it deactivates the actuating means 7 so that the lifting means 2 can no longer move.
  • Such a deactivation consists for instance in interrupting the electric power of the actuating means 7 or, in case of a piston, in interrupting the hydraulic source feeding in fluid said piston.
  • the lifting device 1 comprises at least four sensors 11 positioned at the four corners of the upper frame 4. These sensors 11 are orientated so that the lifting means 2 is at least partially covered by the sensing areas of said sensors 11. In particular, these sensing areas should be configured so as to cover the free spaces A1, A2, A3 and A4 existing between two hinged swing arms 6.
  • said sensing area consists generally in a circular conical area in which the apex of the cone corresponds to the position of the thermopile sensor.
  • thermopile sensor is O and the axis of rotation is (Ox)
  • thermopiles should be adapted to detect a presence or a motion inside an area surrounding at least partially the lifting means of the wheelchair seat.
  • sensors could be adapted to detect other physical parameters existing inside said area. For instance, microwave sensors, optical sensors, capacitive sensors and pyroelectric sensors could constitute alternative solutions for detecting a presence or a motion.

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)
  • Nursing (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
EP09180467A 2009-12-22 2009-12-22 Verfahren zur Sicherung des Anhebebetriebs eines Rollstuhlsitzes und Anhebevorrichtung für einen Rollstuhl Withdrawn EP2338456A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP09180467A EP2338456A1 (de) 2009-12-22 2009-12-22 Verfahren zur Sicherung des Anhebebetriebs eines Rollstuhlsitzes und Anhebevorrichtung für einen Rollstuhl
PCT/IB2010/055977 WO2011077369A1 (en) 2009-12-22 2010-12-21 Method for securitizing the lifting operation of a wheelchair seat and lifting device for a wheelchair seat
EP16161671.9A EP3053565A1 (de) 2009-12-22 2010-12-21 Verfahren zur sicherung des anhebebetriebs eines rollstuhlsitzes
EP10813125.1A EP2515820B9 (de) 2009-12-22 2010-12-21 Verfahren zur sicherung des anhebebetriebs eines rollstuhlsitzes und anhebevorrichtung für einen rollstuhl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09180467A EP2338456A1 (de) 2009-12-22 2009-12-22 Verfahren zur Sicherung des Anhebebetriebs eines Rollstuhlsitzes und Anhebevorrichtung für einen Rollstuhl

Publications (1)

Publication Number Publication Date
EP2338456A1 true EP2338456A1 (de) 2011-06-29

Family

ID=42124691

Family Applications (3)

Application Number Title Priority Date Filing Date
EP09180467A Withdrawn EP2338456A1 (de) 2009-12-22 2009-12-22 Verfahren zur Sicherung des Anhebebetriebs eines Rollstuhlsitzes und Anhebevorrichtung für einen Rollstuhl
EP16161671.9A Withdrawn EP3053565A1 (de) 2009-12-22 2010-12-21 Verfahren zur sicherung des anhebebetriebs eines rollstuhlsitzes
EP10813125.1A Not-in-force EP2515820B9 (de) 2009-12-22 2010-12-21 Verfahren zur sicherung des anhebebetriebs eines rollstuhlsitzes und anhebevorrichtung für einen rollstuhl

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP16161671.9A Withdrawn EP3053565A1 (de) 2009-12-22 2010-12-21 Verfahren zur sicherung des anhebebetriebs eines rollstuhlsitzes
EP10813125.1A Not-in-force EP2515820B9 (de) 2009-12-22 2010-12-21 Verfahren zur sicherung des anhebebetriebs eines rollstuhlsitzes und anhebevorrichtung für einen rollstuhl

Country Status (2)

Country Link
EP (3) EP2338456A1 (de)
WO (1) WO2011077369A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013066198A1 (en) * 2011-11-05 2013-05-10 Mbl Poland Sp. Z.O.O. Lift, preferably for changing the positioning of the seat in a wheelchair

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0273888A2 (de) * 1986-12-29 1988-07-06 Unbescheiden GmbH Hebevorrichtung für Kranke
DE19947372A1 (de) * 1999-10-01 2001-04-19 Gesler Electronic Gmbh Steuerschaltung für eine Hubvorrichtung
WO2003088885A1 (en) * 2002-04-19 2003-10-30 Hill-Rom Services, Inc. Hospital bed obstacle detection device and method
EP1523971A2 (de) 2003-10-13 2005-04-20 Invacare Deutschland GmbH Rollstuhl

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442948B (sv) * 1985-04-26 1986-02-10 Arjo Hospital Equipment Ab Anordning for att stoppa nedsenkningsrorelser hos motordrivna lyftaggregat
AU2008261121A1 (en) * 2008-01-01 2009-07-16 Robert Mckenzie Electric independent person transfer load and unload device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0273888A2 (de) * 1986-12-29 1988-07-06 Unbescheiden GmbH Hebevorrichtung für Kranke
DE19947372A1 (de) * 1999-10-01 2001-04-19 Gesler Electronic Gmbh Steuerschaltung für eine Hubvorrichtung
WO2003088885A1 (en) * 2002-04-19 2003-10-30 Hill-Rom Services, Inc. Hospital bed obstacle detection device and method
EP1523971A2 (de) 2003-10-13 2005-04-20 Invacare Deutschland GmbH Rollstuhl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013066198A1 (en) * 2011-11-05 2013-05-10 Mbl Poland Sp. Z.O.O. Lift, preferably for changing the positioning of the seat in a wheelchair

Also Published As

Publication number Publication date
EP2515820B1 (de) 2016-03-30
EP2515820B9 (de) 2016-07-13
EP3053565A1 (de) 2016-08-10
EP2515820A1 (de) 2012-10-31
WO2011077369A1 (en) 2011-06-30

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