EP0095538A1 - Lits - Google Patents

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Publication number
EP0095538A1
EP0095538A1 EP82303732A EP82303732A EP0095538A1 EP 0095538 A1 EP0095538 A1 EP 0095538A1 EP 82303732 A EP82303732 A EP 82303732A EP 82303732 A EP82303732 A EP 82303732A EP 0095538 A1 EP0095538 A1 EP 0095538A1
Authority
EP
European Patent Office
Prior art keywords
platform
pedal
plate
rod
radius arms
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
EP82303732A
Other languages
English (en)
French (fr)
Inventor
John Mervyn Croxton
Stephen Hayes
Robert Hugh Jones
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.)
Huntleigh Nesbit Evans Ltd
Original Assignee
J Nesbit Evans and 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 J Nesbit Evans and Co Ltd filed Critical J Nesbit Evans and Co Ltd
Publication of EP0095538A1 publication Critical patent/EP0095538A1/de
Ceased 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
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
    • A61G7/005—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame tiltable around transverse horizontal axis, e.g. for Trendelenburg position

Definitions

  • This invention relates tc hospital beds and trolleys of the kind in which the platform to support the patient is mounted on a linkage from a base frame or chassis with a jack for extending the linkage so as to raise the platform.
  • the jack provides for elevation of the platform, and the platform is allowed to descend to a lower position under its own weight.
  • a gas strut is used as a damper to restrict the rate of descent.
  • elaborate provision is made for transferring the weight of the platform (and hence cf the patient) from one part of the linkage to the other at the end of a period of elevation, cr at the commencement of a period of descent, with the object of avoiding jerkiness and shocks which are transmitted to the patient.
  • the object of the invention is to provide an improved structure.
  • a hospital bed or trolley has a platform carried on a pair of radius arms forming a generally parallellograrn linkage, a tic rod connected between the radius arms, the rod (or a ram connected to the radius arms) passing through a pair of canting plates of a mechanical jack, an elevating pedal on the end of one limb of a lever which extends generally parallel to said tie rod, a second limb of the lever extending transversely of the tie rod and being fixed tc a rocking crank, the crank being coupled tc an operating member connected tc one of said plates whereby pedal displacement cants the plate tc wedge on the rod (or rar) and axially displaces the same to elevate the platform, and the second of the plates being springloaded to a normal canting position in which it wedge-locks the rod (or ram) but allows the same to be drawn therethrough in the platform elevating direction, and a second like pedal for displacing the second plate to the non-canting non-wedge
  • the platform is pivotally connected to one of the radius arms and is connected to the other of the radius arms by an adjustable length strut whereby the platform may be tilted relative to the base frame (known per se) and the base franc terminates as close as possible to the mechanism at the feet end of the latter so that maximum tilting of the platform in a foot down position is possible even at minimum elevations of the platform.
  • the bed comprises a base frame 10 provided with a castor 12 at each corner and mounting a pair of radius arms 14 16 which are duplicated on opposite sides of the base frame and are journalled on the base frame.
  • the radius arms have crank extensions 18 20 which are coupled by tie rods 22 only one of which is seen in these drawings. This may be effected by providing parallel shafts 24 26 each of which is coupled to the free ends of the corresponding cranks 18 or 20, these shafts 24 26 being interconnected by a single tie rod 22 which may be laterally offset from the centre line of the arrangement, as best seen in Figure 2.
  • the tie rod may be connected to a gas strut or damper 28 and the opposite end of the same is fixed to the front of the base frame, as also seen in figure 2.
  • the jack which is particularly shown in Figures 3 and 4, comprises a ram 30 which is connected to the shaft 24 so that the action of the jack is to swing the shaft 24 anticlockwise during elevation of the bed platform 32.
  • the platform 32 is connected to the radius arms 14 and 16 by a pair of links 34 towards the foot end of the bed and by a pair of adjustable links 36 towards the head end of the bed.
  • the former are connected tc the radius arms 14 and the latter to the radius arms 16.
  • the adjustment by extending the effective length of the links 36 tilts the foot end of the platform 32 downwardly (or vice versa), and it will be noted (particularly from Figure 2) that the base frame extends forwardly of the radius arms 18 by relatively small dimension so that maximum foot down tilt can be achieved even when the bed platform is at minimum elevation, and without the platform contacting the base frane in the area indicated by the arrow A of Figure 1.
  • the radius arms are journalled by diametrically split shell bearings clamped to the base frame by "U" bolts.
  • this comprises a pair of side plates 40 which are connected together by transversely extending plates 42-46 which also form abutments as will be hereinafter explained. Additionally, the side plates 40 are connected by a carrier member 48 which is used to mount the jack in the base frame.
  • a first canting plate 50 abuts the jack member 42 and is urged by compression spring 52 trapped between it and the jack body member 44.
  • This plate 50 is the one used to displace the ram 30 in the direction of the arrow B of Figure 3 and elevate the platform. Displacement is effected by tie rod 54 which is urged by spring 56 trapped between an abutment on the rod and a loose abutment plate 58, and the rod 54 is connected to crank 60 which is fast with the limb 62 cf the first pedal shaft.
  • the pedal shaft is generally L-shaped with its second limb extending forwardly and approximately parallel to the ram 30, and the shaft is journalled in the plates 40 of the jack body.
  • the ram 30 passes through a second and locking plate 70 which rocks on the abutment 46 and is urged to the illustrated position by spring 72 which is a compression spring abutting against the opposite side of the plate 42 to that abutted by the first plate 50.
  • the spring 72 cants the second plate 70 into the locking position, but movement of the ram 30 in the direction of the arrow B is accompanied by slight movement of the plate against the spring 72 to allow the ram to be drawn through the plate. Any tendency towards reverse movement permits the spring to wedge the plate 70 on the ram and prevent reverse movement of the ram 30.
  • the second pedal 76 is connecteci to a corresponding pedal shaft likewise journalled and crank connected, but this time connected to rod 78 which is urged generally in the direction of arrow B by compression spring 80 trapped between abutment on the rod and the floating abutment 58.
  • the free end of rod 78 carries a striker 82, here shown as an adjustable member, which, on depression of pedal 76 is generally axially displaced against the plate 7U to counter-cant the sar.e and overcome the spring 72 to allow the ram 30 to move in the direction opposite to that of arrow P.
EP82303732A 1982-05-27 1982-07-15 Lits Ceased EP0095538A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8215517 1982-05-27
GB8215517 1982-05-27

Publications (1)

Publication Number Publication Date
EP0095538A1 true EP0095538A1 (de) 1983-12-07

Family

ID=10530674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82303732A Ceased EP0095538A1 (de) 1982-05-27 1982-07-15 Lits

Country Status (4)

Country Link
EP (1) EP0095538A1 (de)
JP (1) JPS58212441A (de)
DK (1) DK326982A (de)
NO (1) NO822523L (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488552A2 (de) * 1990-11-28 1992-06-03 Huntleigh Technology Plc Betten

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2713690B2 (ja) * 1994-05-31 1998-02-16 パラマウントベッド株式会社 床部昇降機構を備えたベッド

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2018221A (en) * 1978-04-01 1979-10-17 Nesbit Evans & Co Ltd Adjustable hospital beds
GB2073140A (en) * 1980-04-05 1981-10-14 Kimura Bed Mfg Driving Device for Lifting and Lowering the Platform of a Bed or Couch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2018221A (en) * 1978-04-01 1979-10-17 Nesbit Evans & Co Ltd Adjustable hospital beds
GB2073140A (en) * 1980-04-05 1981-10-14 Kimura Bed Mfg Driving Device for Lifting and Lowering the Platform of a Bed or Couch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488552A2 (de) * 1990-11-28 1992-06-03 Huntleigh Technology Plc Betten
EP0488552A3 (en) * 1990-11-28 1992-09-09 J. Nesbit Evans & Company Limited Beds

Also Published As

Publication number Publication date
JPS58212441A (ja) 1983-12-10
NO822523L (no) 1983-11-28
DK326982A (da) 1983-11-28

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): FR GB SE

17P Request for examination filed

Effective date: 19840206

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19861019

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CROXTON, JOHN MERVYN

Inventor name: JONES, ROBERT HUGH

Inventor name: HAYES, STEPHEN