Beds – With means for relocating an invalid – With a hoisting – lifting – elevating – or raising device
Patent
1992-05-18
1993-02-23
Trettel, Michael F.
Beds
With means for relocating an invalid
With a hoisting, lifting, elevating, or raising device
5 861, 5 871, A61C 710
Patent
active
051878216
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The present invention relates to a hospital bed.
PRIOR ART
Swedish published patent application no. 406037 discloses an apparatus for lifting a patient confined to bed in which a pulley and a yoke extending over the bed in transverse direction are provided to serve as transfer means and are secured to a supporting frame extending above the bed. An underlay for transferring the patient is connected to bars beside the bed and the patient which bars again are connected to the yoke. By means of the pulley and the yoke, the patient can be lifted and transferred lying on the transfer underlay.
Swedish patent specification no. 341787 discloses a device for lifting a patient in which device a vertical bar serving as the support frame is connected to an edge of a bed. A transverse bar extending above the bed is connected to the support frame. The structure of the transfer underlay is rigid and it is placed under the patient in the bed. Means for transferring a patient comprise a lifting device connected close to the end of the transverse bar. The lifting device includes an electric motor and a drum provided with a lifting rope. The transfer means further comprise a curved frame which is to be placed across over the patient and to which the rigid transfer underlay is connected. The top end of the frame is connected to the lifting rope.
A problem with these devices is for example that the transfer means are located above the bed and the patient in connection with the support frame. This increases the stress on the support frame, requires space above the bed and generally encumbers the use of the device.
To overcome these and other drawbacks of this kind of apparatus, a device disclosed in Finnish patent application no. 892374 has been developed which comprises an elongated support frame connected to the bed, a transfer underlay for the patient and transfer means for transferring a patient on the transfer underlay supported by the support frame. According to the prior application, the transfer means comprise lifting means disposed between the support frame and the lying plane of the bed in such a way that the support frame and the lying plane of the bed are transferable relative to each other substantially in the vertical direction.
In one embodiment of the prior art apparatus, the support frame is connected directly to the body of the bed in which bed the lying plane can be transferred in vertical direction relative to the body and as the lifting means serves the lifting means of the lying plane.
The support frame can be turned from the initial position to deviate from the direction of the longitudinal axis of the bed to a desired angle beside the bed in order to transfer a patient to a transport underlay.
Another application of the prior apparatus further comprises an additional support for supporting the support frame during the turning movement. The additional support is employed to prevent the apparatus and the bed from falling when the support frame is turned from above the bed to a position deviating from the longitudinal axis of the bed.
DISCLOSURE OF INVENTION
The object of the invention is to provide a hospital bed which dispences with any additional supporting structures during transfer of a patient and which still is stable.
Another object of the invention is to provide a structurally simple hospital bed.
The hospital bed of the invention is characterized in that bearer means comprise two bearer rods pivotable about their vertical axes and disposed side by side at a distance from each other in an end of the body, the bearer rods having upper arms and lower arms, which upper arms in their initial position substantially parallel with the longitudinal axis of the bed extend to a distance over lying underlay part and the lower arms to a distance under the body; in that the upper arms and the lower arms are interconnected through articulated joints by a transverse support so as to ensure a parallel turn of the arms aside; in that a bearer beam for a transfer underlay part is secured to
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Nieminen Matti O.
Olkkonen Kari
A. Ahlstrom Corporation
Trettel Michael F.
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