Beds – With means for relocating an invalid – With a hoisting – lifting – elevating – or raising device
Patent
1996-11-25
1998-07-28
Grosz, Alexander
Beds
With means for relocating an invalid
With a hoisting, lifting, elevating, or raising device
5 831, A61G 710
Patent
active
057847290
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to an invalid hoist and more particularly to an invalid hoist which is intended primarily, but not exclusively, for domestic use.
SUMMARY OF THE INVENTION
According to a first aspect of the invention there is provided an invalid hoist comprising a mobile chassis, a lifting column upstanding from the chassis and a lifting arm supported by the lifting column, wherein the chassis comprises a main portion extending transversely of the hoist and two side members which are movable between a first in use position in which they project forwardly from the main portion and a second storage position in which they extend parallel or substantially parallel to the lifting column.
Preferably, the rear ends of the side members and two wheels or castors provided on the main chassis portion support the hoist in a stable upright position when the side members are in said second storage position.
Preferably, the hoist includes four wheels or castors, two on the main chassis portion and one on each of the side members.
Preferably, the lifting arm is pivotably connected to the lifting column. In this case, releasable means may be provided for holding the lifting arm in an operative position and for releasing the lifting arm to allow it to pivot into a storage position alongside the lifting column. Alternatively, an extendible/retractable stay could be connected between the lifting arm and the lifting column at positions remote from the pivot axis between the lifting arm and the lifting column so that the lifting arm can be moved between an operative position and a storage position alongside the lifting column. In this latter case, the stay may include two threaded members which are rotatable relative to one another to extend and retract the stay.
Preferably, the lifting column is in the form of a telescopic mast having a lower part fixed to the main chassis portion and an upper part which can be raised or lowered relative to the lower part. In this case, the lifting arm is, preferably, pivotably connected to the upper part of the mast and has a first limb extending forwardly of the mast and a second limb extending rearwardly of the mast, the second limb being connected by a tie rod to the lower mast part so that as the mast is extended and retracted the lifting arm pivots upwards and downwards, respectively. In this case, the aforesaid releasable means could be provided between the tie rod and the lower mast part or the lifting arm or the tie rod could be in the form of an extendible/retractable stay as aforesaid. Also, in this case, the mast may be in the form of a telescopic actuator powered by a rechargeable battery.
Preferably, a sling hanger is supported by the free end of the lifting arm. In this case, the sling hanger is, preferably, pivotable about a horizontal axis and has two spaced sling attachment points one side of the axis and at least one sling attachment point on the other side of the horizontal axis.
Preferably, the side members are pivotably connected to the main chassis portion for movement between said first in use position and said second storage position. The side members may also be pivotable, when in said first in use position, between a position in which they extend parallel to one another and a position in which they diverge towards their forward ends.
Preferably, a handle is provided on the lifting arm for allowing an operator to move the hoist along a floor surface. In this case, preferably, the handle extends at least part way along each of two opposite sides of the lifting arm and has a transverse portion adjacent to the rear end of the lifting arm.
According to a second aspect of the invention there is provided an invalid hoist comprising a mobile chassis, a lifting column upstanding from the chassis and a lifting arm supported by the lifting column, wherein the lifting arm is pivotably connected to the lifting column and wherein an extendible/retractable device is connected between the lifting arm and the lifting column at positions remote fr
REFERENCES:
patent: 3203009 (1965-08-01), Lundberg
patent: 3711877 (1973-01-01), Averill
patent: 4682377 (1987-07-01), Reich
patent: 4987976 (1991-01-01), Daugherty
patent: 5082127 (1992-01-01), Huang
patent: 5261640 (1993-11-01), Yuan
patent: 5412820 (1995-05-01), Richards
Dunn Robert
Gill Michael George
Greaves John
Lees Richard Ian
Somerton Bruce Edward
Arjo Limited
Grosz Alexander
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