EP2269552B1 - Appareil de freinage pour dispositif de support de patient - Google Patents

Appareil de freinage pour dispositif de support de patient Download PDF

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Publication number
EP2269552B1
EP2269552B1 EP10075514.9A EP10075514A EP2269552B1 EP 2269552 B1 EP2269552 B1 EP 2269552B1 EP 10075514 A EP10075514 A EP 10075514A EP 2269552 B1 EP2269552 B1 EP 2269552B1
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EP
European Patent Office
Prior art keywords
motor
patient support
power
coupled
traction
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
EP10075514.9A
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German (de)
English (en)
Other versions
EP2269552A1 (fr
Inventor
Ronald P Kappeler
Michael M Frondorf
Joseph A Kummer
David P. Lubbers
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Hill Rom Services Inc
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Hill Rom Services Inc
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Publication of EP2269552A1 publication Critical patent/EP2269552A1/fr
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    • 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
    • A61G7/08—Apparatus for transporting beds
    • 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
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/0528—Steering or braking devices for castor 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
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/46—General characteristics of devices characterised by sensor means for temperature

Definitions

  • This invention relates to patient supports, such as beds. More particularly, the present invention relates to devices for moving a patient support to assist caregivers in moving the patient support from one location in a care facility to another location in the care facility.
  • a patient support comprising: a frame; a patient rest surface supported by the frame; a plurality of swivel-mounted casters, including rotatably supported wheels; a traction device coupled to the frame and configured to provide mobility to the frame; a motor operably coupled to the traction device; a traction engagement controller configured to move the traction device between a first position spaced apart from the floor and a second position in contact with the floor; a power source supported by the frame and configured to provide power to the motor; and a braking system coupled to the power source and configured to detect power available to drive the motor and to provide braking based upon the power detected.
  • the traction device may include a rolling support positioned to provide mobility to the bedframe and a rolling support lifter configured to move the rolling support between the storage position and the use position.
  • the rolling support lifter includes a rolling support mount, an actuator, and a biasing device, illustratively a spring.
  • the rolling support includes a rotatable member supported for rotation by the rolling support mount.
  • a motor is operably connected to the rotatable member.
  • the actuator may be configured to move between first and second actuator positions and thereby move the rolling support between first and second rolling support positions.
  • the actuator is further configured to move to a third actuator position while the rolling support remains substantially in the second position.
  • the spring is coupled to the rolling support mount and is configured to bias the rolling support toward the second position when the spring is in an active mode. The active mode occurs during movement of the actuator between the second and third actuator positions.
  • first and second user input devices 32, 34 are configured in any suitable manner to receive the first and second input forces 39 and 41, respectively, from first and second handle members 38 and 40, respectively, and to provide a first force signal 43 based on the first input force 39 and a second force signal 45 based on the second input force 41.
  • the limit switches 33 will detect the storage position of the traction device 26 and prevent operation of the motor 42 in response thereto. As such, should a switch failure occur causing a constant enable signal 52a to be produced by third user input device 35, then the traction device 26 will not lower, and the motor 42 will not propel the patient support 10. A fault condition of the third user input device 35 is therefore identified by the traction device 26 not lowering to its use position in response to unintentional receipt of enable signal 52a by traction engagement controller 28.
  • Fig. 32 illustrates casters 22 in a steer mode of operation where pedal 61 is positioned clockwise, in the direction of arrows 160, from the horizontal neutral position of Fig. 31 .
  • wheels 59 may rotate, but forks 60 are prevented from swiveling.
  • linkage 63 is moved to the right in the direction of arrow 234 in Fig. 32 .
  • tab 65 moves into engagement with switch 67 whereby caster mode signal 56 supplied to traction engagement controller 28 indicates that casters 22 are in the steer mode.
  • traction engagement controller 28 automatically lowers the traction device 26 from its storage position into its use position in contact with the floor 24.
  • the traction engagement controller 28 is configured to (i) activate an actuator to raise traction device 26 when casters 22 are not in a steer mode of operation as detected by caster mode detector 54; and (ii) activate an actuator to raise traction device 26 when externally generated power is received through external power input 50 as detected by external power detector 55.
  • Limit switches 33 detect the raised storage position and the lowered use position of the traction device 26 and provide a signal indicative thereof to the traction engagement controller 28.
  • the traction engagement controller 28 stops the raising or lowering of the traction device 26 once it reaches its desired storage or use position, respectively.
  • the linear actuator in the embodiment of Figs. 8-14 is normally extended (i.e., the linear actuator includes a spring (not shown) which causes it to be in the extended state when it receives no power).
  • Retraction of the linear actuator provides actuation force which moves traction device 26 into contact with floor 24, while extension of the linear actuator removes the actuation force and moves traction device 26 away from floor 24.
  • traction engagement controller 28 inhibits contact of traction device 26 with floor 24 not only when the user places casters 22 of bed 10 in brake or neutral positions, but also when charger 48 is plugged into an external power line through input 50.
  • traction engagement controller 28 prevents lowering of traction device 26 from its storage position to its use position in contact with floor 24 when third user input 35 produces an enable signal 52.
  • Charger 49 is coupled to external power input 50 to receive an externally generated power therefrom, and is coupled to power reservoir 48 to provide charging thereto. Accordingly, charger 49 is configured to use the externally generated power to charge, or replenish, power reservoir 48.
  • charger 49 is an IBEX model number L24-1.0/115AC.
  • the propulsion device 18 is configured to be manually pushed should the traction device 26 be in the lowered use position and power is no longer available to drive the motor 42 and traction engagement controller 28.
  • the motor 42 is geared to permit it to be backdriven.
  • it is preferred that the no more than 200% of manual free force is required to push the bed 10 when the traction device 76 is lowered to the use position in contact with floor 24 but not driven in motion by the motor 42, compared to when the traction device 26 is raised to the storage position.
  • an automatic braking system 103 is coupled intermediate the power reservoir 48 and the motor 42.
  • the braking system 103 is configured to provide braking to the patient support 10 should insufficient power be available to drive the motor 42 and, in turn, the traction device 26 is not capable of moving the bedframe 12. More particularly, the braking system 103 is configured to detect power available to drive the motor 42 and to provide braking of the motor 42 selectively based upon the power detected.
  • the braking system includes a braking controller 105 configured to cause the traction device 26 to operate in a driving mode when it detects power supplied to the motor 42 at least as great as a predetermined value.
  • the braking controller 105 is further configured to cause the traction device 26 to operate in a dynamic braking mode when it detects power supplied to the motor 42 below the predetermined value.
  • the controller 105 comprises a conventional relay 106 including a movable contact 107 which provides electrical communication between a pair of pins P1 and P2 when a sufficient current passes through a coil 108 ( Fig. 3A ).
  • the contact 107 is pulled toward pin P1 by the energized coil 108 against a spring bias tending to cause the contact 107 to be drawn toward pin P3.
  • the contact 107 of the relay 106 disconnects pins P1 and P2 and instead provides electrical communication between pins P2 and P3 when the current through the coil 108 drops below the predetermined value ( Figs. 3B and 3C ).
  • the spring bias causes the contact 107 to move toward the pin P3.
  • the relay 106 may comprise commercially available Tyco Model VF4-15H13-C01 having approximately a 40 amp capacity.
  • the relay 106 is configured to open, and thereby connect pins P2 and P3, when voltage applied to the motor 42 is less than approximately 21 volts and the current supplied to the motor 42 is less than approximately 5 amps.
  • the braking relay 106 functions to switch the motor 42 between a driving mode, as illustrated in Fig. 3A , and a dynamic braking mode, as illustrated in Fig. 3B .
  • the driving mode the braking relay 106 connects the power leads 109a and 109b of the motor 42 with the power reservoir 48, thereby supplying power for driving the motor 42. This, in turn, causes the traction device 26 to drive the bed frame 12 in motion.
  • the braking relay 106 disconnects one of the power leads 109b from the motor 42 and instead shorts the power leads 109a and 109b through contact 107.
  • the motor 42 includes a permanent magnet
  • shorting the power leads 109a and 109b causes the motor 42 to act as an electronic brake, in a manner known in the art.
  • shorting the power leads 109a and 109b causes the motor 42 to function as a brake resulting in the traction device 26 resisting movement of the patient support 10.
  • the override switch 111 is provided in order to remove the short from the motor leads 109a and 109b and thereby prevent the motor 42 from functioning as an electronic brake.
  • the shut down relay 77 may respond to the enable/disable signal 52 from the third user input device 35, thereby causing the braking relay 106 to short the leads to the motor 42 resulting in the motor 42 operating in the braking mode.
  • This condition may be desirable in certain circumstances where braking is desired in response to either (i) the failure of the user to provide an enable command 51a to the third user input device 35 or (ii) the user providing a disable command 51b to the third user input device 35.
  • a user selectively applies a desired amount of motor horsepower 47 to traction device 26 by imparting a selected amount of force on handle 30. It should be readily appreciated that in this manner, the user causes patient support 10 of Fig. 1 to "self-propel" to the extent that the user applies force to handle 30.
  • first force signal 43 from first user input device 32 and second force signal 45 from second user input device 34 are each correspondingly positive or negative with respect to a suitable neutral reference, which allows speed controller 36 to provide a correspondingly positive or negative speed control signal to motor drive 44.
  • Motor drive 44 then in turn provides a correspondingly positive or negative drive power to motor 42.
  • a positive drive power causes motor 42 to move traction device 26 in a forward direction
  • the negative drive power causes motor 42 to move traction device 26 in an opposite reverse direction.
  • the illustrative embodiment provides motor horsepower 47 to traction device 26 proportional to the sum of the first and second input forces from first and second ends 38, 40, respectively, of handle 30.
  • the illustrative embodiment generally increases the motor horsepower 47 when a user increases the sum of the first input force 39 and the second input force 41, and generally decreases the motor horsepower 47 when a user decreases the sum of the first and second input forces 39 and 41.
  • handle 30 and the remainder of input system 20 and the resulting propulsion of patient support 10 propelled by traction device 26 provide inherent feedback (not shown) to propulsion system 16 which allows the user to easily cause patient support 10 to move at the pace of the user so that propulsion system 16 tends not to "outrun" the user.
  • propulsion system 16 tends not to "outrun" the user.
  • handle 30 and the remainder of input system 20 and the resulting propulsion of patient support 10 propelled by traction device 26 provide inherent feedback (not shown) to propulsion system 16 which allows the user to easily cause patient support 10 to move at the pace of the user so that propulsion system 16 tends not to "outrun" the user.
  • propulsion system 16 tends not to "outrun" the user.
  • patient support 10 moves faster than the user which, in turn, tends to reduce the pushing force applied on handle 30 by the user.
  • patient support 10 tends to automatically match the pace of the user.
  • First buffer stage 76 includes an operational amplifier 88, a resistor 90, a resistor 92, and a potentiometer 94 which are electrically connected to form a high input impedance, noninverting amplifier with offset adjustability as shown.
  • the noninverting input of operational amplifier 88 is electrically connected to node C of first load cell 62.
  • Resistor 90 is very small relative to resistor 92 so as to yield practically unity gain through buffer stage 76. Accordingly, resistor 90 is 1k ohm, and resistor 92 is 100k ohm.
  • Potentiometer 94 allows for calibration of summing control circuit 66 as discussed below. Accordingly, potentiometer 94 is a 20k ohm linear potentiometer.
  • second buffer stage 78 is configured in identical fashion to first buffer stage 76; however, the noninverting input of the operational amplifier in the second buffer stage 78 is electrically connected to node H of second load cell 64 as shown.
  • second pre-summer stage 82 is configured in identical fashion to first pre-summer stage 80; however, the noninverting input of the operational amplifier in second pre-summer stage 82 is electrically connected to node G of second load cell 64 as shown.
  • the components shown in Fig. 4A provide the speed control signal 46 to motor drive 44 generally in the following manner.
  • the user calibrates speed controller 36 ( Fig. 2 ) to provide the speed control signal 46 within limits that are consistent with the configuration of motor drive 44.
  • speed controller 36 Fig. 2
  • motor drive 44 responds to a voltage input range from roughly 0.3 VDC (for full reverse motor drive) to roughly 4.7 VDC (for full forward motor drive) with roughly 2.3-2.7 VDC input null reference/deadband (corresponding to zero motor speed).
  • Fig. 4B shows an alternate embodiment of aspects of input system 20 of propulsion system 17 of Fig. 2 .
  • the circuit of Fig. 4B includes first load cell 62 and second load cell 64, both of which are identical to those described above.
  • the circuit of Fig. 4B further includes a summing control circuit 66 ⁇ for generating the speed control signal described above.
  • Summing control circuit 66 ⁇ generally includes a noise filtering stage 680, an instrumentation amplifier 70 ⁇ , a voltage reference circuit 72 ⁇ , a first buffering stage 74 ⁇ , and a second buffering stage 76 ⁇ .
  • the input system of the present disclosure may be used on motorized support frames other than beds.
  • the input system may be used on carts, pallet movers, or other support frames used to transport items from one location to another.
  • User input device 35 further includes a relay switch 85 positioned adjacent a pin 97 coupled to first end 87 of bail 75 and a keyed lockout switch 93 coupled to plate 142 as shown in Fig. 15 .
  • Relay switch 85 and keyed lockout switch 93 are coupled in series to provide the enable and disable commands.
  • Keyed lockout switch 93 must be turned to an "on" position by a key 95 for an enable command and relay switch must be in a closed position for an enable command. It should be appreciated that the keyed lockout switch 93 is optional and may be eliminated if not desired.
  • Propulsion device 18 includes an illustrative embodiment traction device 26 comprising a wheel 150, an illustrative embodiment traction engagement controller 28 comprising a wheel lifter 152, and a chassis 151 coupling wheel lifter 152 to bedframe 12.
  • traction device 26 comprising a wheel 150
  • traction engagement controller 28 comprising a wheel lifter 152
  • chassis 151 coupling wheel lifter 152 to bedframe 12.
  • other traction devices or rolling supports such as multiple wheel devices, track drives, or other devices for imparting motion to a patient support are used as the traction device.
  • other configurations of traction engagement controllers are provided, such as the wheel lifter described in U.S. Patent Nos. 5,348,326 to Fullenkamp, et al. , 5,806,111 to Heimbrock, et al. , and 6,330,926 to Heimbrock, et al. , the disclosures of which are expressly incorporated by reference herein.
  • Motor 172 includes a housing 178 and an output shaft 176 and a planetary gear (not shown). Motor 172 rotates shaft 176 about an axis of rotation 180 and motorized wheel 150 is directly coupled to shaft 176 to rotate about an axis of rotation 182 that is coaxial with axis of rotation 180 of output shaft 176. Axes of rotation 180, 182 are transverse to pivot axis 158.
  • Actuator 184 is configured to move between an extended position as shown in Fig. 10 and a retracted position as shown in Fig. 12-14 . Movement of actuator 184 from the extended to retracted position moves first link 198 in a clockwise direction 222. This movement of first link 198 pulls second link 210 and shuttle 188 to the left in direction 224 as shown in Fig. 11 . Movement of shuttle 188 to the left in direction 224 pushes gas springs 192 downward and to the left in direction 228 and pushes a distal end 230 of wheel mount 154 downward in direction 232 as shown in Fig. 11 .
  • Shuttle 188 includes a first slot 340 for pivotally receiving an end of second link 210. Similarly, shuttle 188 includes second and third slots 342 for pivotally receiving ends of gas spring 292 as shown in Fig. 9 .
  • Bracket 220 is coupled to the second bracket 276 with a deflection guard 334 sandwiched therebetween. Gas springs 292 are coupled to bracket 220 as shown in Fig. 9 .
  • a plate 336 is coupled to pan 256 to provide a stop that limits forward movement of wheel mount 154.
  • second bracket 276 includes an extended portion 338 that provides a second stop for wheel mount 154 that limits backward movement of wheel mount 154.
  • a pin 440 passes through each tubular member 434 and into the sidewalls of the mounting tube 438 in order to secure the first and second handle members 431 and 433 thereto.
  • a collar 442 may be concentrically received around an upper end of the mounting tube 438 in order to shield the pin 440
  • the rolling support lifter 454 includes a rolling support mount 458 coupled to the chassis 456 and a rolling support mover 460 coupled to rolling support mount 458 and chassis 456 at various locations.
  • the rollers 450 and 452 are rotatably supported intermediate side plates 462 and spacer plates 464 forming the rolling support mount 458.
  • the rollers 450 and 452 preferably include a plurality of circumferentially disposed teeth 466 for cooperating with a plurality of teeth 468 formed on an inner surface 470 of the belt 453 to provide positive engagement therewith and to prevent slipping of the belt 453 relative to the rollers 450 and 452.
  • Each roller 450 and 452 likewise preferably includes a pair of annular flanges 472 disposed near a periphery thereof to assist in tracking or guiding belt 453 in its movement.
  • the rolling support mover 460 is configured to pivot the rolling support mount 458 and motorized track drive 449 about a pivot axis 474 to move the traction belt 453 between a storage position spaced apart from floor 24 and a use position in contact with floor 24 as illustrated in Figs. 22-24 .
  • Rolling support mount 458 is further configured to permit the track drive 449 to raise and lower during use of the patient support 10 ⁇ in order to compensate for changes in elevation of the patient support 10 ⁇ .
  • rolling support mount 458 and track drive 449 may pivot in a counterclockwise direction 166 about pivot axis 474 when bedframe 12 moves over a bump in floor 24.
  • the rolling support mount mover 460 further includes a linear actuator 480 connected to a motor 482 through a conventional gearbox 484.
  • a linkage system 486 is coupled to the actuator 480 through a pivot arm 488.
  • a first end 490 of the pivot arm 488 is connected to the linkage system 486 while a second end 492 of the arm 488 is connected to a shuttle 494.
  • the shuttle 494 is configured to move substantially horizontally in response to pivoting movement of the arm 488.
  • the arm 488 is operably connected to the actuator 480 through a hexagonal connecting shaft 496 and link 497.
  • the linkage system 486 includes a first link 498 and a second link 500 coupling the actuator 480 to the rolling support mount 458.
  • the first link 498 includes a first end which is pivotally coupled to the arm 488 and a second end which is pivotally coupled to a first end of the second link 500.
  • the second link 500 in turn, includes a second end which is pivotally coupled to the side plate 462 of the rolling support mount 458.
  • Extension of the actuator 480 is stopped when an engagement arm 524 supported by connecting link 497 contacts a limit switch 526 supported by the chassis 456.
  • a retracted position of actuator 480 is illustrated in Fig. 34 while an extended position of actuator 480 engaging the limit switch 526 is illustrated in Fig. 35 .
  • the actuator 480 continues to extend so that the tubular shuttle 494 continues to move to the left in direction of arrow 224.
  • This continued movement of the shuttle 494 and the contact of motorized belt 453 with floor 24 causes compression of springs 506.
  • continued movement of the shuttle 494 occurs relative to the piston 512 which remains relatively stationary due to its attachment to the rolling support mount 458 through the chain 518.
  • continued movement of the shuttle 494 causes the end wall 508 to compress the spring 506 against the disk 516 of the piston 512.
  • Such additional movement creates compression in the springs 506 such that the springs 506 are compressed while the belt 453 is in the normal use position with bedframe 12 at a normal distance from the floor 24.
  • This additional compression creates a greater normal force between the floor 24 and belt 453 so that the belt 453 has increased traction with the floor.
  • the belt 453 may include a textured outer surface.
  • the compression in springs 506 create a downward bias on rolling support mount 458 in direction 232 so that when bedframe 12 is positioned over a "recess" in floor 24, spring 506 moves rolling support mount 458 and belt 453 in clockwise direction 160 about the pivot axis 474 so that the belt 453 remains in contact with the floor 24.
  • spring 506 moves rolling support mount 458 and belt 453 in clockwise direction 160 about the pivot axis 474 so that the belt 453 remains in contact with the floor 24.
  • the weight of patient support 10 will compress springs 506 so that rolling support mount 458 and belt 453 rotate in counterclockwise direction 166 relative to chassis 456 and bedframe 12, as illustrated in Fig. 26 .
  • the actuator 480 moves to the retracted position as illustrated in Fig. 22 wherein the arm 488 is rotated counterclockwise by the connecting shaft 496. More particularly, as the actuator 480 retracts, the connecting link 497 causes the connecting shaft 496 to rotate in a counterclockwise direction, thereby imparting similar counterclockwise movement to the arm 488.
  • the tubular shuttle 494 is thereby pushed to the right in direction 234. Simultaneously, the linkage 486 is pulled to the left thereby causing the rolling support mount 458 to pivot in a counterclockwise direction about the pivot axis 474 such that the track drive 449 are raised in a substantially vertical direction.
  • the compression in springs 506 is gradually relieved until the springs 506 are again extended as illustrated in Fig. 22 .
  • Chassis 456 includes a chassis body 550 including a pair of spaced side arms 552 and 554 connected to a pair of spaced end arms 556 and 558 thereby forming a box-like structure.
  • a pair of cross supports 560 and 562 extend between the end arms 556 and 558 and provide support for the motor 172 and actuator 480.
  • the rolling support mount 458 is received between the cross supports 560 and 562.
  • the hex connecting shaft 496 passes through a clearance 563 in the first cross support 560 and is rotatably supported by the second cross support 562.
  • a pan 564 is secured to a lower surface of the chassis body 550 and includes an opening 566 for permitting the passage of the belt 453 therethrough.
  • the sprockets 520 are rotatably supported by the cross supports 560 and 562.
  • a third embodiment patient support 10 ⁇ is illustrated in Figs. 41-63 as including an alternative embodiment propulsion system 160 coupled to the bedframe 12 in a manner similar to that identified above with respect to the previous embodiments.
  • the alternative embodiment propulsion system 16 ⁇ includes a propulsion device 18 ⁇ and an input system 200 coupled to the propulsion device 18 ⁇ in the manner described above with respect to the previous embodiments and as disclosed in Fig. 2 .
  • each handle member 731 and 733 may be oriented approximately 180° relative to the position shown in Figs. 57 and 58 , thereby facing inwardly toward the mattress 14 such that an individual moving the bed 10" through the handle members 731 and 733 may have his or her fingers contacting the button 736.
  • lower ends 742 of the handle members 731 and 733 are supported for selective pivoting movement inwardly toward a center axis 744 of the bed 10 ⁇ .
  • the handle members 731 and 733 may be moved into a convenient and non-obtrusive position.
  • a coupling 746 is provided between proximal and distal portions 748 and 750 of the handle members 731 and 733 in order to provide for the folding or pivoting of the handle members 731 and 733 into a stored position.
  • the distal portions 750 of the handle members 731 and 733 are received within the proximal portions 748 of the handle members 731 and 733.
  • both handle members 731 and 733 comprise elongated tubular members 751 including distal portions 750 which are slidably receivable within proximal portions 748.
  • the third embodiment propulsion device 18 ⁇ is shown in greater detail in Figs. 42-50 .
  • the propulsion device 18 ⁇ includes a rolling support comprising a track drive 449 which is substantially identical to the track drive 449 disclosed above with respect to the second embodiment of propulsion device 18 ⁇ .
  • Rolling support mount 766 is further configured to permit the track drive to raise and lower during use of the patient support 10 ⁇ in order to compensate for changes in elevation of the patient support 10 ⁇ in a manner similar to that described above with respect to the previous embodiments.
  • rolling support mount 766 is configured to permit traction belt 453 to remain in contact with floor 24 during changes in elevation of floor 24 relative to patient support 10 ⁇ .
  • Rolling support mount 766 further includes a motor mount 479 supporting a motor 42 coupled to chassis 764 in order to provide power to rotate the first roller 450 and, in turn, the traction belt 453. Additional details of the motor 42 are provided above with respect to the previous embodiments of patient support 10 and 10 ⁇ .
  • the rolling support mount mover 768 further includes a linear actuator 774, preferably a 24-volt linear motor including built-in limit travel switches.
  • a linkage system 776 is coupled to the actuator 774 through a pivot bracket 778.
  • a first end 780 of pivot bracket 778 is connected to the linkage system 776 while a second end 782 of the pivot bracket 778 is connected to a shuttle 784, preferably an extension spring.
  • the spring 784 is configured to move substantially horizontally in response to pivoting movement of the bracket 778.
  • the bracket 778 is operably connected to the actuator 774 through a hexagonal connecting shaft 786 having a pivot axis 788.
  • the extension spring 784 includes opposing first and second ends 796 and 798, wherein the first end 796 is fixed to the pivot bracket 778 and the opposing second end 798 is fixed to a flexible linkage, preferably chain 518.
  • the chain 518 is guided around a sprocket 520 and includes a first end connected to the spring 784 and a second end fixed to an upwardly extending arm 800 of the side plate 770 of the rolling support mount 766.
  • actuator 774 moves to the retracted position as illustrated in Fig. 46 wherein the pivot bracket 778 is rotated counterclockwise by the hex shaft 786. More particularly, as the actuator 774 retracts, the connecting link 497 causes the hex shaft 786 to rotate in a counterclockwise direction, thereby imparting similar counterclockwise pivoting movement to the pivot bracket 778. The linkage 776 is thereby pulled to the left causing the rolling support mount 766 to pivot in a counterclockwise direction about the pivot axis 772 such that the track drive 449 is raised in a substantially vertical direction. It should be noted that initial movement of the link 790 will cause the pin 797 to slide within the elongated slot 795. However, as the pin 797 reaches its end of travel within the slot 795, the link 790 will pull the mount 766 upwardly.

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  • Health & Medical Sciences (AREA)
  • Nursing (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)
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Claims (9)

  1. Support pour patient (10) comprenant :
    un cadre (12) ;
    une surface de maintien du patient (15) supportée par le cadre (12) ;
    une pluralité de roulettes montées sur pivots, pourvues de roues rotatives ;
    un dispositif de traction (26) relié au cadre (12) et configuré pour rendre mobile le cadre (12) ;
    un moteur (42) fonctionnellement relié au dispositif de traction (26) ;
    une source de courant (48) supportée par le cadre et configurée pour alimenter en courant le moteur ; et
    un système de freinage (103) relié à la source de courant (48) et configuré pour détecter un courant disponible pour entraîner le moteur (42) et assurer un freinage en fonction du courant détecté, caractérisé en ce que le support pour patient (10) comprend en outre :
    une unité de commande d'engagement de traction (28) configurée pour déplacer le dispositif de traction (26) entre une première position espacée du sol et une seconde position en contact avec le sol ;
    un détecteur de mode de roulette (54) configuré pour transmettre un signal de mode de roulette (56) à l'unité de commande d'engagement de traction, indiquant le mode de fonctionnement des roulettes, et un détecteur de courant externe (55) configuré pour transmettre un signal de courant externe (57) à l'unité de commande d'engagement de traction (28), indiquant la connexion du courant externe au support pour patient,
    dans lequel l'unité de commande d'engagement de traction (28) est en outre configurée pour déplacer le dispositif de traction vers la première position quand le signal de mode de roulette (56) indique que les roulettes ne sont pas en mode de direction ou que le signal de courant externe (57) indique que le courant externe est connecté, et pour déplacer le dispositif de traction vers la deuxième position quand le signal de mode de roulette (56) indique que les roulettes sont en mode de direction ou que le signal de courant externe (57) indique que le courant externe est déconnecté ; et
    un commutateur d'inhibition (111) configuré pour désengager le système de freinage (103).
  2. Support pour patient selon la revendication 1, dans lequel le système de freinage (103) amène le moteur (42) à fonctionner en tant que frein électronique quand le courant détecté est inférieur à une valeur prédéterminée.
  3. Support pour patient selon la revendication 2, dans lequel le système de freinage (103) amène le moteur (42) à fonctionner en tant que frein électronique quand la tension appliquée au moteur est inférieure à approximativement 21 volts et le courant fourni au moteur est inférieur à approximativement 5 ampères.
  4. Support pour patient selon l'une des revendications précédentes, dans lequel le moteur (42) comporte une paire de câbles de puissance (109a, 109b), le système de freinage (103) étant configuré pour court-circuiter sélectivement les câbles de puissance (109a, 109b).
  5. Support pour patient selon la revendication 4, dans lequel le moteur (42) comprend un moteur à aimant permanent et l'unité de commande comprend un relais de freinage (106).
  6. Support pour patient selon l'une des revendications précédentes, comprenant en outre un relais d'arrêt (77) relié à la source de courant (48) et configuré pour déconnecter la source de courant (48) du moteur (42) quand le courant stocké dans la source de courant (48) est inférieur à une valeur prédéterminée.
  7. Support pour patient selon la revendication 6, comprenant en outre un commutateur (100) relié au relais d'arrêt (77) et configuré pour la déconnexion manuelle de la source de courant (48) du moteur (42) indépendamment de la valeur du courant stocké dans la source de courant (48).
  8. Support pour patient selon l'une des revendications précédentes, dans lequel le dispositif de traction (26) comprend un élément rotatif (449) couplé opérationnellement au moteur (42).
  9. Support pour patient selon la revendication 8, dans lequel le dispositif de traction (26) comprend en outre une courroie continue (453) supportée par l'élément rotatif (449).
EP10075514.9A 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient Expired - Lifetime EP2269552B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US34505802P 2002-01-04 2002-01-04
EP09012752A EP2135593B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient
EP03729322A EP1467692B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient

Related Parent Applications (4)

Application Number Title Priority Date Filing Date
EP09012752A Division EP2135593B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient
EP03729322A Division EP1467692B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient
EP03729322.2 Division 2003-01-03
EP09012752.3 Division 2009-10-08

Publications (2)

Publication Number Publication Date
EP2269552A1 EP2269552A1 (fr) 2011-01-05
EP2269552B1 true EP2269552B1 (fr) 2014-10-01

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EP10075514.9A Expired - Lifetime EP2269552B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient
EP03729322A Expired - Lifetime EP1467692B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient
EP09012752A Expired - Lifetime EP2135593B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP03729322A Expired - Lifetime EP1467692B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient
EP09012752A Expired - Lifetime EP2135593B1 (fr) 2002-01-04 2003-01-03 Appareil de freinage pour dispositif de support de patient

Country Status (6)

Country Link
EP (3) EP2269552B1 (fr)
AT (1) ATE445383T1 (fr)
AU (1) AU2003235735A1 (fr)
CA (1) CA2469462C (fr)
DE (1) DE60329655D1 (fr)
WO (1) WO2003057126A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003235735A1 (en) * 2002-01-04 2003-07-24 Hill-Rom Services, Inc. Braking apparatus for a patient support
EP1744716A4 (fr) 2004-05-12 2012-05-09 Surgipod Pty Ltd Support lateral pour table d'operation
US8069513B2 (en) 2006-01-19 2011-12-06 Hill-Rom Services, Inc. Patient support apparatus having auto contour
US7922183B2 (en) * 2006-01-19 2011-04-12 Hill-Rom Services, Inc. Stretcher having hand actuated wheel braking apparatus
US7810822B2 (en) 2006-01-19 2010-10-12 Hill-Rom Services, Inc. Stretcher having hand actuated caster braking apparatus
US8757308B2 (en) * 2009-09-10 2014-06-24 Hill-Rom Services Inc. Powered transport system and control methods
CZ306185B6 (cs) 2013-08-15 2016-09-14 Linet, Spol. S R. O. Lůžko
CZ306175B6 (cs) 2013-10-04 2016-09-07 Linet Spol. S R.O. Lůžko a metoda jeho ovládání

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP1467692B1 (fr) * 2002-01-04 2009-10-14 Hill-Rom Services, Inc. Appareil de freinage pour dispositif de support de patient

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US3872945A (en) * 1974-02-11 1975-03-25 Falcon Research And Dev Co Motorized walker
US4387325A (en) * 1981-04-15 1983-06-07 Invacare Corporation Electric wheelchair with speed control circuit
US5348326A (en) 1993-03-02 1994-09-20 Hill-Rom Company, Inc. Carrier with deployable center wheels
US5806111A (en) 1996-04-12 1998-09-15 Hill-Rom, Inc. Stretcher controls
US6321878B1 (en) 1999-03-05 2001-11-27 Hill-Rom Services, Inc. Caster and braking system
US6330926B1 (en) 1999-09-15 2001-12-18 Hill-Rom Services, Inc. Stretcher having a motorized wheel
JP2004515262A (ja) * 2000-05-11 2004-05-27 ヒル−ロム サービシーズ，インコーポレイティド 患者支持体用自動牽引装置

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Publication number Priority date Publication date Assignee Title
EP1467692B1 (fr) * 2002-01-04 2009-10-14 Hill-Rom Services, Inc. Appareil de freinage pour dispositif de support de patient

Also Published As

Publication number Publication date
EP2135593B1 (fr) 2013-02-27
CA2469462C (fr) 2009-12-22
DE60329655D1 (de) 2009-11-26
ATE445383T1 (de) 2009-10-15
EP2135593A2 (fr) 2009-12-23
WO2003057126A1 (fr) 2003-07-17
CA2469462A1 (fr) 2003-07-17
EP2135593A3 (fr) 2010-08-18
AU2003235735A1 (en) 2003-07-24
EP2269552A1 (fr) 2011-01-05
EP1467692A1 (fr) 2004-10-20
EP1467692B1 (fr) 2009-10-14

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