EP3761936A1 - Brancard de sauvetage mobile - Google Patents

Brancard de sauvetage mobile

Info

Publication number
EP3761936A1
EP3761936A1 EP19718582.0A EP19718582A EP3761936A1 EP 3761936 A1 EP3761936 A1 EP 3761936A1 EP 19718582 A EP19718582 A EP 19718582A EP 3761936 A1 EP3761936 A1 EP 3761936A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
rescue
linear actuator
space
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
EP19718582.0A
Other languages
German (de)
English (en)
Other versions
EP3761936B1 (fr
Inventor
Peter Roider
Andreas Meyer
Christian Hart
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.)
HAWE Altenstadt Holding GmbH
Original Assignee
HAWE Altenstadt Holding GmbH
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 HAWE Altenstadt Holding GmbH filed Critical HAWE Altenstadt Holding GmbH
Publication of EP3761936A1 publication Critical patent/EP3761936A1/fr
Application granted granted Critical
Publication of EP3761936B1 publication Critical patent/EP3761936B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A61G1/00—Stretchers
    • A61G1/04—Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
    • A61G1/052—Struts, spars or legs
    • A61G1/056—Swivelling legs
    • A61G1/0565—Swivelling legs simultaneously folding, e.g. parallelogram structures
    • A61G1/0567—Swivelling legs simultaneously folding, e.g. parallelogram structures folding in x-shape
    • 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
    • A61G1/00—Stretchers
    • A61G1/013—Stretchers foldable or collapsible
    • 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
    • A61G1/00—Stretchers
    • A61G1/02—Stretchers with wheels
    • 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
    • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort
    • 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
    • A61G7/012—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame raising or lowering of the whole mattress frame

Definitions

  • the present invention relates to a mobile
  • Ambulance vehicles comprising a wheeled chassis and a supported by this
  • Pressure supply unit and at least one actuatable by this linear actuator comprehensive hydraulic drive system is variable, which further comprises a manually operable unlocking valve unit for directly connecting a hub working space of
  • Hydraulic fluid has.
  • hinged - rescue berth retract when the latter (loaded or unloaded) in the ambulance vehicle
  • WO 2014/089180 A1 WO 2011/041170 A2, WO 2009/085332 A1 and WO 2006/036980 A1.
  • Unlocking valve unit a direct connection of a stroke working space of the linear actuator with a
  • Storage space for hydraulic fluid can be produced, serves - in the field of emergency medicine eminently important - time savings; because, for example, so the rapid retraction of the chassis the
  • Unlocking valve unit for direct connection of a stroke working space of the linear actuator with a
  • the present invention has set itself the task of a generic mobile rescue table
  • Control space which is bounded by a relative to the housing of the valve unit movably guided piston element and with the hub working space
  • Piston member is operatively connected to a valve body, which with a valve connected between the hub working space and the terminal connected to the receiving space valve seat of a
  • Relief valve cooperates, and further wherein a mechanical actuating input of the valve unit with the interposition of a spring element on the
  • Valve body acts. Accordingly, the
  • Safety functionality such that the prevailing in the stroke working space of the linear actuator of the hydraulic drive system pressure, which is an indicator of the loading of the Patenteliege is, is connected to a control room and arranged therein, with a valve body of the
  • Relief valve connected piston element acts.
  • a mechanical actuating input of the valve unit acts in such a way with the interposition of a
  • Pressure level in the control chamber leads to a displacement of the valve body under opening of the relief valve, whereas at one above the predetermined
  • a safety functionality is integrated in the smallest possible space in the unlocking valve unit, which prevents hydraulic fluid from flowing out of the stroke working space of the linear actuator into the receiving space for hydraulic fluid when the patient bed is loaded - via an opened relief valve - and
  • Invention are the piston member and the valve body part of a rigid valve body assembly.
  • the piston element by screwing, pressing or other joining technique) can be fixedly attached to the valve body.
  • Control chamber is provided, which is bounded by a an annular active surface exhibiting piston element. This embodiment favors the
  • control chamber is particularly preferably radially outwardly bounded by the housing of the valve unit and radially inward of the valve body assembly.
  • a closing spring acting on the valve body-in the sense of closing the relief valve-can also be arranged in the annular control chamber. This also contributes to a particularly compact design of the entire unlocking valve unit, including the implemented
  • Actuator input functionally downstream - spring element on the piston element. It can do that Spring element be designed in particular as a helical spring. This may particularly preferably be dimensioned so that its diameter is substantially equal to the
  • Diameter of the - opposite - effective area of the piston element corresponds. This favors the
  • the relevant stop is preferably designed in or on the housing of the valve unit.
  • Assigned actuating element which can assume a position in which it opens a check valve, which between one with the lowering workspace of the
  • Linear actuator connected terminal and the terminal connected to the receiving space is arranged.
  • such an actuating element can form a projection of the valve body, in particular directly be formed on this.
  • the actuating element is dimensioned such that the
  • Non-return valve with locking direction from the sink working space to the receiving chamber designed - slightly offset from the opening of the relief valve.
  • valve body lifts off the valve body from the valve seat of the relief valve, before-somewhat delayed-the shut-off valve is also opened. Are open at a corresponding position of the valve body, both the relief valve and the check valve, as a result, the two working spaces of the
  • Relief valve arranged a flow restrictor.
  • This flow restrictor can in particular be designed in the form of a ring or in the form of a plurality of annular sections, more preferably by an annular gap between the valve body and the valve housing or annular gap sections existing there.
  • Linear actuator has a pressure relief, which is effective in the stroke working space of the linear actuator at its maximum volume.
  • Hydraulic cylinders to be used end position reliefs (eg via relief notches) known.
  • Fig. 1 is a view of their basic structure illustrated mobile rescue berth with a change in the height of the
  • Fig. 2 is a circuit diagram to the hydraulic system of
  • FIG. 3 shows a section through the unlocking valve unit used in the hydraulic system according to FIG. 2.
  • Rescue beach 1 comprises in known as such a four wheels 2 exhibiting chassis 3 and supported by this patient bed 4. It is - for a change in the altitude H of the patient bed 4 above the wheels 2 - the geometry of a base frame B and a scissor lift structure S. comprehensive chassis 3 changeable, by means of a hydraulic
  • Hydraulic fluid Hydraulic fluid, a pressure supply unit 7 and at least one acted upon by this - between the base frame B and the scissor lift S
  • the linear actuator 8 is a double-acting differential cylinder. 9
  • Piston working space 10 forms the hub working space 11, ie that a pressurization of the piston working chamber 10 acts in the sense of lifting the patient bed 4.
  • piston rod working space 12 forms the sinking working space 13, d. H. a pressurization of the piston rod working chamber 12 acts in the sense of a
  • the hydraulic system on whose - readily removable from Fig. 2 - other, beyond the following explanations embodiment in detail it does not matter for the present invention further comprises a manually operable unlocking valve unit 14.
  • a manually operable unlocking valve unit 14 This is suitable, a direct fluidic Connection of the hub working space 11 and the sinking working space 13 of the linear actuator 8 with each other and with the receiving space 6 for
  • the unlocking valve unit 14 comprises a relief valve 16 designed as a seat valve 15, which is arranged in a flow path 17 extending from the lifting working space 11 to the receiving space 6, and a shut-off valve 19 designed as a releasable check valve 18. which in an extending from the sinking work space 13 to the receiving space 6
  • Flow path 20 is arranged.
  • the structural design of the unlocking valve unit 14 is illustrated in FIG. It comprises a housing 21 with a recording of the
  • Tank connection 25 is in the receiving bore 22 a
  • Valve seat 26 of the relief valve 16 executed. With this acts in the receiving bore 22 along the axis A displaceable valve body 27 together.
  • Huban gleich 23 opens into a - radially outwardly through the housing 21 and radially inwardly limited by the valve body 27 - annular control chamber 28. This is axially on the one hand by a collar 29 in which the valve body 27 is guided, and on the other hand by a on the
  • Valve body 27 mounted piston member 30 with a sealing bore in the receiving bore 22 annular piston
  • control chamber 28 is a closing spring
  • the unlocking valve unit 14 further includes a mechanical actuating input 35 in the form of a in the Receiving bore 22 along the axis A displaced
  • the plunger 36 is approximately cup-shaped with a projecting from the bottom 37 Betsch Trentswarze 38. On these acts a lever 39, which in turn - for example via a
  • Bowden cable with a release handle - can be coupled.
  • a spring element 40 is interposed, so that the plunger 36 can act on the valve body assembly 34 only via the spring element 40.
  • Spring element 40 is a helical spring 41
  • a running in the receiving bore 22 step 42 is a mechanical stop 43 for the plunger 36, which limits the path of movement of the plunger 36, in a position in which the
  • valve insert 45 is received in the receiving bore 22, adjacent to the closure stopper 44 inserted at the end.
  • the check valve 18 blocks the
  • valve body 27 comprises an actuating element 46 in the form of an unlocking pin 49 acting on the valve ball 47, with the position of the valve body 27 corresponding thereto. If in the control chamber 28 such - above a predetermined pressure level - pressure prevails that the force exerted on the piston member 30 hydraulic force is greater than the transferable by the coil spring 41 force causes a depression of the plunger 36 compression of the coil spring 41st Die
  • Valve body assembly 34 does not move and the relief valve 16 remains closed, as does the
  • Valve body assembly 34 and consequently an opening of the relief valve 16 and the check valve 19.
  • the fluidic connection between the Huban gleich 23 and the tank port 25 is effected via a

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)
  • Invalid Beds And Related Equipment (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

Brancard de sauvetage mobile dans lequel la géométrie d'un châssis peut être modifiée au moyen d'un système d'entraînement hydraulique pour modifier la hauteur d'un brancard de patient s'appuyant sur le châssis. Celui-ci comprend un actionneur linéaire, une unité d'alimentation en pression et un espace de réception pour liquide hydraulique et comprend en outre une unité de soupape de déverrouillage (14) actionnable manuellement pour la connexion directe d'un espace de travail de levage de l'actionneur linéaire à l'espace de réception pour liquide hydraulique. L'unité de soupape de déverrouillage (14) comprend un espace de commande (28), qui est limité par un élément formant piston (30) guidé mobile par rapport au boîtier (21) de l'unité de soupape et qui communique avec le raccord de levage (23) communicant avec l'espace de travail de levage. L'élément formant piston (30) est relié fonctionnellement au corps de soupape (27), lequel interagit avec un siège de soupape (26) d'une soupape de détente (16) réalisé entre le raccord de levage (23) et un raccord de réservoir (25) communicant avec l'espace de réception (6). En outre, une entrée d'actionnement mécanique (35) de l'unité de soupape (14) agit sur le corps de soupape (27) par l'intermédiaire d'un élément de ressort (40).
EP19718582.0A 2018-04-19 2019-04-01 Brancard de sauvetage mobile Active EP3761936B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018109352.7A DE102018109352A1 (de) 2018-04-19 2018-04-19 Fahrbare Rettungsliege
PCT/EP2019/058147 WO2019201579A1 (fr) 2018-04-19 2019-04-01 Brancard de sauvetage mobile

Publications (2)

Publication Number Publication Date
EP3761936A1 true EP3761936A1 (fr) 2021-01-13
EP3761936B1 EP3761936B1 (fr) 2022-11-16

Family

ID=66240051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19718582.0A Active EP3761936B1 (fr) 2018-04-19 2019-04-01 Brancard de sauvetage mobile

Country Status (5)

Country Link
US (1) US11219562B2 (fr)
EP (1) EP3761936B1 (fr)
CN (1) CN112118819B (fr)
DE (1) DE102018109352A1 (fr)
WO (1) WO2019201579A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018109352A1 (de) * 2018-04-19 2019-10-24 HAWE Altenstadt Holding GmbH Fahrbare Rettungsliege
CN112155895B (zh) * 2020-11-25 2021-09-10 浙江肯特科技股份有限公司 一种智控微流舒适睡眠床垫
DE102021204291B3 (de) * 2021-04-29 2022-06-15 Hawe Hydraulik Se Hydrauliksystem für eine fahrbare Rettungsliege und fahrbare Rettungsliege
DE102021209014A1 (de) * 2021-08-17 2023-02-23 Hawe Hydraulik Se Hydraulische Antriebseinheit für eine Krankentrageliege und Krankentrageliege mit einer solchen hydraulischen Antriebseinheit

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FR1285438A (fr) * 1961-01-14 1962-02-23 Renault Suspension hydraulique à correcteur de niveau suivant la charge du véhicule
DE3611437A1 (de) * 1986-04-05 1987-10-08 Medical Res & Dev Ag Vorrichtung mit einem ersten und einem zweiten rahmen, wobei beide rahmen ueber scherenartig gekoppelte elemente miteinander verbunden sind
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Also Published As

Publication number Publication date
US20210369513A1 (en) 2021-12-02
US11219562B2 (en) 2022-01-11
CN112118819A (zh) 2020-12-22
DE102018109352A1 (de) 2019-10-24
WO2019201579A1 (fr) 2019-10-24
EP3761936B1 (fr) 2022-11-16
CN112118819B (zh) 2022-11-01

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