This invention relates to apparatus for lifting and/or lowering persons in confined spaces. More specifically the invention relates to apparatus for lifting and lowering persons in a bath tub.
Various forms of apparatus are known for assisting persons into and out of bath tubs. For example, it is known to use hoists to lift and lower persons in a recumbent or sitting posture. These devices however are cumbersome and awkward to use in a confined space as often found in bathrooms. The applicant has invented a device for lifting and lowering persons in confined spaces which is disclosed in PCT publication No. WO/01/91690 and UK publication No. GB2358797. The device disclosed in these applications comprises an inflatable structure with a seating surface and an inflatable back support attached thereto. The device requires a rigid plate attached to its underside to ensure the stability of the inflatable structure. When the device is deflated it can be felt by the user and can be uncomfortable. Further said rigid plate makes the device awkward to fold and store. The device also has a pinched waist between the seat and back support to produce a hinge between these two elements. The waist results in a sharply concave section of the periphery weld at this point. Such a concave weld experiences enhanced stresses when the product is pressurised.
An object of the present invention is to provide a lifting and lowering device for use in confined spaces which overcomes, or obviates the problems associated with the known devices.
A further object of the invention is to provide a stable lifting and lowering device which can withstand high internal pressures.
Yet a further object of the invention is to provide a lifting and lowering device which is compactable, lightweight and easy to carry and stow.
According to the invention there is provided a device for lifting and lowering a person in a confined space, comprising an inflatable cushion with a seating surface and an inflatable back rest attached thereto and movable relative to the cushion, said back rest attached so that when the device is inflated the back rest is biased in an open position such that it extends in substantially the same plane as the seating surface of the cushion and wherein said device is provided with at least one aperture located between the back rest and cushion.
The device can thus be placed in a confined space such as a bath tub and inflated to provide a raised seating surface for the user to sit upon. When the device is inflated the back rest is biased in an open extended position. By deflating the device the person is lowered to the bottom of the bath. At the same time the back rest also deflates but since it is biased in the open position it comes into contact with the sloping back wall of the bath tub and is pushed towards an upright position relative to the seating surface. Since the back rest is biased to the open position the back rest comes into intimate contact with the back slope of the bath and conforms to the angle of the bath slope. This enhances the stability both of the device and the user; it provides a comfortable back support for the bather assisting the bather to sit in a sitting posture in the bath.
Preferably, the back rest is attached to the cushion by hinge means.
The device may be provided with at least one locating element on a lower part of the cushion to enable the device to be positioned correctly in the bath with respect to the back slope of a bath. As the device is deflated in the bath the back rest is forced into contact with the back slope of the bath. Preferably, the at least one locating element is handle shaped.
The at least one aperture is preferably located centrally along the hinge line between the cushion and the back rest. When the device is deflated the device is folded such that the aperture receives the at least one locating element to provide a handle for carrying and storing the device.
More preferably the hinge means is biased towards an open position. The cushion may comprise a plurality of air bags stacked one on top of each other. Preferably the back rest is attached to the uppermost bag.
Preferably still the device is provided with support means for engaging with a support surface upon which the device is placed. More preferably the support means comprises suction cups. More preferably still, the device comprises four suction cups.
The invention will now be described, by way of example only, with reference to the following drawings in which:
b shows a perspective view of an inside part of the inflated device according to one aspect of the invention,
c is a plan view of
Bags 2a, 2b and 2c are provided with internal webs which are attached to the internal surfaces of each of the bags to control their shape and form when inflated. The back rest 3 when inflated has convex sides. The bags 2a, 2b and 2c and back rest 3 are connected so that the fluid, for example gas which is used to inflate the device 1 can flow freely between all parts of the device. The back rest 3 is provided with an input/output to which a gas supply line 5 is fitted. The gas supply which is not shown may be provided by a pump and may be controlled by a hand control (not shown). The back rest is connected to the cushion 2 such that it is biased to the open position when the device is inflated as shown in
To use the device 1, the device is fully inflated on a support surface which may be a surface in a confined space, for example a bath tub. A locating element which is described later ensures that the device is correctly positioned within the bath with respect to the back slope of the bath. A bather can then sit on the device and as the device is deflated the person will be lowered into the bath tub in a sitting posture. Since the back rest 3 is biased in the open position it comes into contact with the sloping back wall of the bath tub as the device 1 is lowered. The back rest 3 is therefore pushed towards an upright position relative to plane of the seating surface 4 and the back rest comes into intimate contact with the back slope of the bath and conforms to the angle of the bath slope. This enhances the stability of the device 1 and provides pelvic stability and a comfortable back support for the bather allowing the bather to sit in a sitting posture in the bath. The back rest 3 may be deflated to allow the bather to lie against the back slope of the bath or only be partially deflated so that the bather has a cushion between the slope of the bath and his or her back. When the bather has finished bathing, the device 1 can simply be inflated which raises the person in a sitting posture and allows the bather to simply stand up from the device 1 and move out of the bath.
b shows an internal perspective view of the connection of the uppermost bag 2c to the back rest 3.
Rigid plates may be located on the interior of the back rest 3 and/or bag 2c to reinforce the stiffness of the weld areas 13.
In
When the device 1 has been used and is ready to be stored it may be deflated as shown in
The device is compactable, lightweight and easy to carry and quick to use. Further it may be used without requiring carers or other persons to assist the bather.
It is understood that the scope of the present invention is not limited by the embodiment shown in the drawings. In particular the device may be made in a wide range of sizes to suit different uses. Moreover, the invention includes any novel and inventive feature disclosed herein either alone or in combination with any one or more other such features.
Number | Date | Country | Kind |
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0710626.3 | Jun 2007 | GB | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/GB2008/001901 | 6/4/2008 | WO | 00 | 3/26/2010 |