EP1328231B1 - Mecanisme de verrouillage pour civiere d'ambulance - Google Patents

Mecanisme de verrouillage pour civiere d'ambulance Download PDF

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Publication number
EP1328231B1
EP1328231B1 EP00976818A EP00976818A EP1328231B1 EP 1328231 B1 EP1328231 B1 EP 1328231B1 EP 00976818 A EP00976818 A EP 00976818A EP 00976818 A EP00976818 A EP 00976818A EP 1328231 B1 EP1328231 B1 EP 1328231B1
Authority
EP
European Patent Office
Prior art keywords
lever arm
frame
elongate lever
cot frame
securing system
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.)
Expired - Lifetime
Application number
EP00976818A
Other languages
German (de)
English (en)
Other versions
EP1328231A1 (fr
Inventor
Christopher B. Way
Clifford E. Lambarth
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.)
Stryker Corp
Original Assignee
Stryker Corp
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 Stryker Corp filed Critical Stryker Corp
Publication of EP1328231A1 publication Critical patent/EP1328231A1/fr
Application granted granted Critical
Publication of EP1328231B1 publication Critical patent/EP1328231B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61G1/00—Stretchers
    • A61G1/06—Supports for stretchers, e.g. to be placed in or on vehicles
    • 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
    • A61G3/00—Ambulance aspects of vehicles; Vehicles with special provisions for transporting patients or disabled persons, or their personal conveyances, e.g. for facilitating access of, or for loading, wheelchairs
    • A61G3/08—Accommodating or securing wheelchairs or stretchers
    • A61G3/0816—Accommodating or securing stretchers
    • A61G3/0875—Securing stretchers, e.g. fastening means
    • A61G3/0891—Securing stretchers, e.g. fastening means by preventing longitudinal movement

Definitions

  • This invention relates to securing systems and, more particularly, to an ambulance cot frame securing system for an ambulance or other type of patient transport vehicle.
  • Ambulance cot frame securing systems are known, examples of which are U.S. Patent Nos. 1 477 815, 5 092 722, 5 205 601 and 5 913 559.
  • the cot frame securing systems are basically either floor mounted systems or wall mounted systems- A combination of floor and wall mounted systems are also known.
  • US5,779,296 shows an apparatus which is given at least two patient supports within a vehicle during transport.
  • the support is secured to trays that are telescopically removable from bases on the floor of a vehicle. They also pivotally attached to a base with pivotable movement about an axis perpendicular to the floor.
  • the ambulance cot securement mechanism must be able to hold the ambulance cot in place during acceleration forces of 20 G's in the forward direction, 10 G's in the vertical direction, 10 G's in the lateral direction and 10 G's in the rearward direction, to meet the nationally recognized crash/impact standards.
  • the mechanism for facilitating the aforesaid securement of the ambulance cot frame to the ambulance or other type of patient transport vehicle is expensive and requires operable mechanisms to facilitate the securement mechanism in place during travel of the vehicle. It has been experienced that these mechanisms, over time, operate hesitatingly which is unacceptable in emergency situations.
  • an ambulance cot frame securing system that will accommodate cot frame distortions during periods of time where there occurs a sudden acceleration or deceleration by the patient transport vehicle. Furthermore, it is desirable to provide an ambulance cot frame securing system for a patient transport vehicle which facilitates only during instances where G forces in at least one of several specific directions, caused by a rapid change in velocity of the patient transport vehicle, exceeds a predetermined value to cause a self-activating, inertia responsive, locking mechanism to be deployed to lock the cot frame at the other end, thus at both ends, to the vehicle. Otherwise, and under normal driving conditions, the cot frame is secured only at one end for preventing movement of the cot frame relative to the floor along a direction parallel to a longitudinal axis of the cot frame.
  • an ambulance cot frame securing system for a patient transport vehicle which includes a floor frame adapted to be secured to a floor of the patient transport vehicle.
  • the floor frame has at a first end thereof a fixed angled restraint inclined upwardly and in a direction toward a second end of the floor frame to define an overhang spaced upwardly from the floor frame so as to provide a gap into which is adapted to be received a first part of the cot frame.
  • the floor frame additionally has a releasable latch mechanism adapted to be releasably coupled to a second part of the cot frame so as to hold the cot frame in a fixed lengthwise location relative to the floor frame.
  • the securement system additionally has a self-activating, inertia responsive, locking mechanism activatable in response only to acceleration or deceleration G forces on the patient transport vehicle which exceed a predetermined value to additionally securely lock the first part of the cot frame relative to the patient transport vehicle.
  • An ambulance cot frame securing system 10 is illustrated in Figure 1 and includes a pair of parallel elongate frame members 11 interconnected at a first end 12 by a plate-like member 13 and at a second rear (right) front (left) end 14 by a releasable latch mechanism 16.
  • the ambulance cot frame securing mechanism 10 illustrated in Figure 1 is adapted to be secured to the floor of a patient transport vehicle utilizing a plurality of bolts (not illustrated) received in a plurality of holes schematically indicated at various locations by center lines 17.
  • the releasable latch mechanism 16 is oriented adjacent a rear access opening into the cargo area of the patient transport vehicle and can be of any conventional type adapted to be releasably securable to a downwardly depending pin or post provided as standard equipment on ambulance cot frames.
  • the downwardly depending pin is generally circular in cross-section and is indicated at 18 in Figures 2, 4 and 5.
  • the releasable latch mechanism 16 includes a latch frame 19 secured to the frame members 11 by fasteners 21.
  • the latch frame 19 includes a pair of opposing surfaces 22 which serve to guide the pin 18 into the pin receiving area 23 whereat is located a releasable latch 24.
  • the latch 24, which is illustrated in more detail in Figure 3, includes a pair of rotatably supported locking members 26 and 27 each supported on respective axles 28 and 29.
  • the locking member 26 is urged in a clockwise direction by a torsion spring 31 whereas the locking member 27 is urged in a counter-clockwise direction by a torsion spring 32.
  • the locking members 26 and 27 have, respectively, mutually opposing surfaces 33 and 34, when in the closed position thereof illustrated in Figure 3, to close off the opening 36 in the latch frame 19 when the pin 18 on the cot is received therein as illustrated in Figure 2.
  • the locking members 26 and 27 are prevented from moving in their respective opposite rotative directions by a cam member 37 rotatably supported on an axle 38 and urged in a counter-clockwise direction about the axle 38 by a torsion spring 39.
  • the locking member 26 has a recess 41 in a peripheral edge thereof into which is received a tongue 42 on the cam member 37.
  • the latch frame 19 also has a push button 43 reciprocally mounted thereon which is operatively connected by a link 44, schematically illustrated in Figures 2, 4 and 5, to an extension 46 on the cam member 37.
  • a push button 43 reciprocally mounted thereon which is operatively connected by a link 44, schematically illustrated in Figures 2, 4 and 5, to an extension 46 on the cam member 37.
  • a force is transmitted through the link 44 to the extension 46 to urge the cam member 37 clockwise against the urging of the torsion spring 39 to release the locking member 26.
  • locking members 26 and 27 will spring open to the Figure 5 position so that the pin 18 on the cot can be urged toward the access opening into the cargo area of a patient transport vehicle as depicted by a movement of the cot pin from the Figure 4 position to the Figure 5 position.
  • releasable latch mechanism 16 is only one exemplary embodiment for securing the pin 18 on the cot to the ambulance cot frame securing system 10.
  • Other varieties of releasable latch mechanisms can also be employed.
  • a pair of laterally spaced cot frame hold-down members 47 and 48 there is provided on the plate 13 a pair of laterally spaced cot frame hold-down members 47 and 48.
  • the left cot frame hold-down member 47 is illustrated in an initial position whereas the right cot frame hold-down member 48 is illustrated in a tripped position, both positions of which will be explained in more detail below. It is to be understood that it generally will be the case where both cot frame hold-down members 47 and 48 will simultaneously be in the same position, namely, an initial position such as is illustrated at the left side of Figure 1 and a tripped position illustrated at the right side of Figure 1.
  • each cot frame hold-down member 47 and 48 Figures 6-9 illustrate the structure thereof. More specifically, and since each cot frame hold-down mechanism 47 and 48 are the mirror image of each other, only one such cot frame hold-down member, such as the hold-down member 47, will be described in detail.
  • the cot frame hold-down member 47 includes a base 49 configured for securement to the plate 13 using the same fasteners that effect a fastening of the securing system 10 to the floor of the patient transport vehicle through openings indicated by axes 17.
  • the forward end 51 of the base 49 corresponding to the forward portion of the cargo area of the patient transport vehicle, includes an upstanding column 52 having at the upper end thereof a cantilevered member 53 overhanging the base 49 so as to define a gap 54 between the underside of the cantilevered member 53 and the upper surface of the base 49 into which is adapted to be received a cot frame part 56 schematically illustrated in Figures 8 and 9.
  • a rubber or other elastic material bumper 57 is secured to the upstanding column 52 within the gap 54 by a fastener 58.
  • an elongate trough 59 into which is located an elongate lever arm 61 pivotally secured to the base 49 about an axle 62 which extends perpendicular to the longitudinal axis of the ambulance cot frame securing system 10.
  • the elongate lever arm 61 is configured to have a center of gravity CG initially oriented forwardly of the axis 63 of the axle 62 a distance X, and above the axis 63 a distance Y, as illustrated in Figure 8. In this particular embodiment, and when the elongate lever arm 61 is in the initial position thereof illustrated in Figure 8, the distance X 1 exceeds the distance Y 1 .
  • the distances X 1 and Y 1 serve to regulate the amount of acceleration in the direction of left to right in Figure 8 that is needed in order to deploy the elongate lever arm 61 from the position illustrated in Figure 8 to the position illustrated in Figure 9.
  • a deceleration force would exist in the reverse direction causing the elongate lever arm 61 to move from the Figure 8 position to the Figure 9 position.
  • the orientation of the center of gravity as aforesaid, and an adjustment of the spring force of a spring 76 described in more detail below, causes the G force required to deploy the elongate lever arm 61 to be preset to exceed a predetermined value in the forward and rearward directions, such as 5 G.
  • the elongate lever arm 61 is, therefore, a self-activating, inertia responsive, cot locking mechanism.
  • the rear end 64 of the elongate lever arm 61 is adapted to abut a surface 66 also adjacent the rear end 67 of the base 49.
  • the elevation of the surface 66 and the location of the rear end 64 of the elongate lever arm 61 are proportioned so as to define a limit of inclination of the elongate lever arm when in the deployed position illustrated in Figure 9 so that the front end 68 of the elongate lever arm 61 becomes oriented closely adjacent the downwardly facing surface 69 of the cantilever member 53.
  • a latch pin 71 (see Figures 10-12) reciprocally mounted in a hole 72 provided in the base 49, the axis of the hole 72 extends in a direction parallel to the axis 63.
  • the hole 72 has an internal thread 73 into which is received an externally threaded plug 74 having the latch pin 71 reciprocally supported therein and resiliently urged by a spring 76 into,engagement with a side wall 77 of the elongate lever arm 61.
  • a detent 78 is provided in the side wall 77 of the lever arm 61 and the nose 79 of the latch pin 74, which is spherical in configuration, is received into the detent 78.
  • the spring force of the spring 76 urging the spherical nose 79 into the detent 78 is adjusted in a conventional way to prevent inadvertent deployment of the lever arm 61 from the position illustrated in Figure 8 to the position illustrated in Figure 9 until the G force on the patient transport vehicle exceeds a predetermined value in the vertical direction, such as 5 G.
  • a manually engagable handle 81 is provided on the end of the latch pin 71 remote from the elongate lever arm 61. By manually pulling outwardly (leftwardly in Figure 10) on the handle 81, the spring 76 can be compressed to effect a withdrawal of the pin into the hole 72 for reset purposes described below.
  • the latch pin 71 In operation of the latch pin 71, the latch pin 71 will be urged to a fully extended position illustrated in Figure 12 wherein the nose 79 thereof is in the path of movement of the elongate lever arm 61 thereby preventing it from returning from the deployed position of Figure 9 to the initial position thereof illustrated in Figure 8.
  • the peripheral surface 82 of the latch pin 71 as depicted in Figure 9 engages an opposing surface 83 on the underside of the elongate lever arm 61.
  • the cot frame will distort due to the rear end thereof being fixedly secured to the floor of the vehicle by reason of the pin 18 being engaged in the latch 24. As a result, the cot frame part 56 will tend to move, due to flexure of the entire cot frame, rearwardly out from under the cantilever member 53.
  • the elongate lever arm 61 In instances where the patient transport vehicle becomes oriented upsidedown, it will be desirable for the elongate lever arm 61 to deploy. In this instance, the deployment will occur only in response to a rapid change in velocity of the patient transport vehicle, as aforesaid, causing the G force on the cot to exceed the predetermined value and in a direction having a component of motion that is perpendicular away from the floor to prevent the free removal of the cot frame part 59 from the gap 54 due to deflection of the cot frame as described above.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Invalid Beds And Related Equipment (AREA)

Claims (11)

  1. Système de fixation de cadre de civière d'ambulance (10) pour un véhicule de transport de malades comprenant un cadre de plancher adapté pour être fixé au plancher du véhicule de transport de malades, ledit cadre de plancher comportant à une première extrémité une retenue à angle fixe inclinée vers le haut et dans un sens vers une seconde extrémité dudit cadre de plancher afin de définir un porte-à-faux espacé vers le haut dudit cadre de plancher de façon à aménager un espace dans lequel une première partie du cadre de civière adaptée est reçue, ledit cadre de plancher comportant de plus un mécanisme de verrou déverrouillable (16) adapté pour être couplé de façon déverrouillable à une seconde partie du cadre de civière de façon à maintenir le cadre de civière dans une position longitudinale fixe par rapport audit cadre de plancher, caractérisé par un mécanisme de fermeture, sensible à l'inertie, auto-activé (26, 27) activable en réponse à une accélération ou décélération du véhicule de transport de malades pour empêcher le retrait libre de ladite première partie du cadre de civière d'en-dessous dudit porte-à-faux.
  2. Système de fixation de cadre de civière d'ambulance selon la revendication 1, caractérisé en ce que ledit mécanisme de fermeture auto-activé comporte un bras de levier allongé (61) supporté de façon pivotante entre ledit cadre de plancher et ledit porte-à-faux destiné à se déplacer autour d'un axe pivot (62) entre des première et seconde positions, ladite première position facilitant le déplacement libre et non obstrué de ladite première partie du cadre de civière, quand elle est orientée en dessous dudit porte-à-faux et ledit mécanisme de verrou déverrouillable (16) est déverrouillé, vers ladite seconde extrémité dudit cadre de plancher, ladite seconde position obstruant le mouvement de la première partie du cadre de civière, quand elle est orientée en dessous dudit porte-à-faux, vers ladite deuxième extrémité.
  3. Système de fixation de cadre de civière d'ambulance selon la revendication 2, caractérisé en ce que ledit bras de levier allongé (61) a un centre de gravité orienté à un espacement vers l'avant et au-dessus dudit axe pivot.
  4. Système de fixation de cadre de civière d'ambulance selon la revendication 3, caractérisé en ce qu'un axe longitudinal dudit bras de levier allongé (61) est orienté parallèlement à un plan dudit cadre de plancher et a une longueur suffisante sur un côté vers l'avant dudit axe pivot (62) pour amener une extrémité distale avant dudit bras de levier allongé à s'orienter hors d'un plan dudit cadre de plancher et à une position adjacente audit porte-à-faux quand il se trouve dans sa dite seconde position.
  5. Système de fixation de cadre de civière d'ambulance selon la revendication 3, caractérisé en ce que ledit centre de gravité dudit bras de levier allongé est, quand il se trouve dans sa dite première position, espacé davantage vers l'avant d'un plan vertical contenant ledit axe pivot que l'espacement au-dessus d'un plan horizontal contenant ledit axe pivot.
  6. Système de fixation de cadre de civière d'ambulance selon la revendication 5, caractérisé en ce que ledit centre de gravité dudit bras de levier allongé est, quand il se trouve dans sa dite seconde position, espacé davantage au-dessus dudit plan horizontal contenant ledit axe pivot que l'espacement vers l'avant dudit plan vertical contenant ledit axe pivot.
  7. Système de fixation de cadre de civière d'ambulance selon la revendication 2, caractérisé en ce que ledit mécanisme de fermeture auto-activé comporte en outre une goupille de verrouillage (74) montée réciproquement sur ledit cadre de plancher pour se déplacer dans un sens parallèle audit axe pivot dudit bras de levier allongé, un élément déformable élastiquement (76) couplé opérationnellement à ladite goupille de verrouillage pour pousser continûment ladite goupille de verrouillage axialement vers une paroi latérale dudit bras de levier allongé et en engagement avec celle-ci quand ledit bras de levier allongé se trouve dans sa dite première position.
  8. Système de fixation de cadre de civière d'ambulance selon la revendication 7, caractérisé en ce que ladite goupille de verrouillage (71) est déplaçable axialement sous une influence dudit élément déformable élastiquement (76) jusqu'à une position en dessous du bras de levier allongé quand ledit bras de levier allongé se trouve dans sa dite seconde position pour empêcher un mouvement non voulu dudit bras de levier allongé depuis sa dite seconde position jusqu'à sa dite première position.
  9. Système de fixation de cadre de civière d'ambulance selon la revendication 8, caractérisé en ce que ladite goupille de verrouillage (71) comporte une poignée (81) pour faciliter l'engagement manuel de celle-ci afin d'effectuer un mouvement axial de ladite goupille de verrouillage contre une poussée dudit élément déformable élastiquement (76) pour retirer ladite goupille de verrouillage d'en dessous dudit bras de levier allongé et permettre un mouvement dudit bras de levier allongé depuis ladite seconde position jusqu'à ladite première position.
  10. Système de fixation de cadre de civière d'ambulance selon la revendication 7, caractérisé en ce que la valeur prédéterminée est pré-établie par ledit élément déformable élastiquement à 5G.
  11. Système de fixation de cadre de civière d'ambulance selon la revendication 1, dans lequel le changement rapide de vitesse est indicatif d'une collision ou d'un impact.
EP00976818A 2000-10-27 2000-10-27 Mecanisme de verrouillage pour civiere d'ambulance Expired - Lifetime EP1328231B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/030204 WO2002034192A1 (fr) 2000-10-27 2000-10-27 Mecanisme de verrouillage pour civiere d'ambulance

Publications (2)

Publication Number Publication Date
EP1328231A1 EP1328231A1 (fr) 2003-07-23
EP1328231B1 true EP1328231B1 (fr) 2007-01-17

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EP00976818A Expired - Lifetime EP1328231B1 (fr) 2000-10-27 2000-10-27 Mecanisme de verrouillage pour civiere d'ambulance

Country Status (4)

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EP (1) EP1328231B1 (fr)
AU (2) AU1454101A (fr)
DE (1) DE60033064T2 (fr)
WO (1) WO2002034192A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013004194U1 (de) 2012-05-07 2013-08-08 Stollenwerk und Cie. GmbH Fabrik für Sanitätsausrüstungen Vorrichtung zur Fixierung einer Krankentrage und/oder eines Krankentragenfahrgeräts in einem Fahrzeug

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830437B1 (fr) * 2001-10-04 2004-09-10 Rts Chapuis Systeme d'ancrage pour brancard et/ou chariot porte-brancard sur une surface, en particulier sur le plancher d'une ambulance
GB0214812D0 (en) * 2002-06-27 2002-08-07 Ferno Uk Ltd Stretcher retention
GB2431360A (en) * 2005-10-24 2007-04-25 Vw Company Ltd Stretcher/trolley ambulance parking station arrangement
CN111374839B (zh) * 2018-12-27 2022-07-12 华创车电技术中心股份有限公司 轮型辅具的车载固定装置
FR3100712A1 (fr) * 2019-09-13 2021-03-19 Cdc Group Dispositif d’arrimage de chargement et/ou d’extraction motorises d’un chariot portant un brancard, recepteur et ambulance associes

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US1477815A (en) 1922-10-26 1923-12-18 Denning David Cot-retaining device for ambulances
GB1567751A (en) * 1975-09-16 1980-05-21 Gkn Sankey Ltd Securing wheelchairs in vehicles
US4265478A (en) * 1979-05-09 1981-05-05 Korsgaard Carl E Safety locking mechanism for wheelchairs
FR2547194B1 (fr) * 1983-06-09 1986-09-05 Baboulin Rene Crochet d'amarrage de brancard pour ambulance
US5092722A (en) 1991-05-07 1992-03-03 Ferno-Washington, Inc. Automatically adaptable fastening system for wheeled cots and similar devices
US5205601A (en) 1991-08-30 1993-04-27 Ferno-Washington, Inc. Ambulance lock
JP3265660B2 (ja) * 1992-12-16 2002-03-11 アラコ株式会社 車椅子用固定装置
US5779296A (en) * 1993-06-04 1998-07-14 Vancouver Island Helicopters, Ltd. Patient transport system
US5628595A (en) * 1995-03-22 1997-05-13 Associated Partnership Ltd. Inc. Wheelchair lock-down device
US5913559A (en) 1997-03-19 1999-06-22 Ferno-Washington, Inc. Fastening track, cot transport vehicle adapted to secure the fastening track, and cot fastening system incorporating same
DE19730189C2 (de) * 1997-07-15 2000-06-29 Ferno Transportgeraete Gmbh Vorrichtung zur lösbaren Verbindung einer Krankentrage auf einem Krankentragenfahrgestell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013004194U1 (de) 2012-05-07 2013-08-08 Stollenwerk und Cie. GmbH Fabrik für Sanitätsausrüstungen Vorrichtung zur Fixierung einer Krankentrage und/oder eines Krankentragenfahrgeräts in einem Fahrzeug

Also Published As

Publication number Publication date
EP1328231A1 (fr) 2003-07-23
AU1454101A (en) 2002-05-06
AU2001214541B2 (en) 2005-09-01
DE60033064D1 (de) 2007-03-08
DE60033064T2 (de) 2007-11-15
WO2002034192A1 (fr) 2002-05-02

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