The invalid lifting device comprises a first mast upstanding from a first elongate chassis member and a second mast upstanding from a second elongate chassis member which is parallel or substantially parallel to the first chassis member. The lifting device also comprises a lifting arm supported by and extending between the first and second masts, the lifting arm comprising two parts pivotable relative to one another so that the distance between the masts can be varied. One part is supported by the first mast and the other part is supported by the second mast. Power operated means are provided for moving the two chassis members towards and away from one another. Each part of the lifting arm comprises a parallelogram linkage to maintain the chassis members in parallel or substantially parallel relationship as the two chassis members are moved towards and away from one another. Each mast may be telescopically extendible/retractable and power operated means may be provided for extending and retracting the two masts in synchronism with one another.
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18. An invalid lifting device comprising a first telescopically extendible/retractable mast upstanding from a first elongate chassis member, a second telescopically extendible/retractable mast upstanding from a second elongate chassis member, each mast having an upper part and a lower part, a lifting arm supported by and extending between the first and second masts, wherein the lifting arm is telescopically extendible and retractable so that the distance between the chassis members can be varied.
15. An invalid lifting device comprising a first telescopically extendible/retractable mast upstanding from a first elongate chassis member, a second telescopically extendible/retractable mast upstanding from a second elongate chassis member, each mast having an upper part and a lower part, a lifting arm supported by and extendible between the first and second masts, wherein the lifting arm comprises two parts pivotable relative to one another about a vertical or substantially vertical axis, one part being supported by the first mast and the other part being supported by the second mast.
1. An invalid lifting device comprising a first mast upstanding from a first elongate chassis member, a second mast upstanding from a second elongate chassis member which is parallel or substantially parallel to the first chassis member, a lifting arm supported by and extending between the first and second masts, the lifting arm comprising two parts pivotable relative to one another so that the distance between the masts can be varied, one part being supported by the first mast and the other part being supported by the second mast, and power operated means for moving the two chassis members towards and away from one another, wherein each part of the lifting arm comprises a parallelogram linkage to maintain the chassis members in parallel or substantially parallel relationship as the two chassis members are moved towards and away from one another.
2. An invalid lifting device as claimed in
3. An invalid lifting device as claimed in
4. An invalid lifting device as claimed in
5. An invalid lifting device as claimed in
6. An invalid lifting device as claimed in
0. 7. An invalid lifting device comprising a first telescopically extendible/retractable mast upstanding from a first elongate chassis member, a second telescopically extendible/retractable mast upstanding from a second elongate chassis member, each mast having an upper part and a lower part, a lifting arm supported by and extending between the first and second masts, wherein the lifting arm is the sole means connecting the first mast and chassis member to the second mast and chassis member.
0. 8. An invalid lifting device as claimed in
0. 9. An invalid lifting device as claimed in
0. 10. An invalid lifting device as claimed in
0. 11. An invalid lifting device as claimed in
0. 12. An invalid lifting device as claimed in
0. 13. An invalid lifting device as claimed in
0. 14. An invalid lifting device as claimed in
16. The invalid lifting device of
17. The invalid lifting device of
19. The invalid lifting device of
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According to a first aspect of the invention there is provided an invalid lifting device comprising a first mast upstanding from a first elongate chassis member, a second mast upstanding from a second elongate chassis member which is parallel or substantially parallel to the first chassis member, a lifting arm supported by and extending between the first and second masts, the lifting arm comprising two parts pivotable relative to one another so that the distance between the masts can be varied, one part being supported by the first mast and the other part being supported by the second mast, and power operated means for moving the two chassis members towards and away from one another, wherein each part of the lifting arm comprises a parallelogram linkage to maintain the chassis members in parallel or substantially parallel relationship as the two chassis members are moved towards and away from one another.
According to a second aspect of the invention there is provided an invalid lifting device comprising a first telescopically extendible/extractable mast upstanding from a first elongate chassis member, a second telescopically extendible/retractable mast upstanding from a second elongate chassis member, each mast having an upper part and a lower part, a lifting arm supported by and extending between the first and second masts, and power operated means for extending and retracting the first and second masts in synchronism with one another.
The invention will now be more particularly described, by way of example, with reference to the accompanying drawings.
Referring firstly to
A lifting arm 16 is supported by and extends between the upper parts 14 of the first and second masts 10 and 12, respectively. The lifting arm 16 comprises two parts 17 and 18 pivotable relative to one another in a horizontal plane. The part 17 is supported by the upper part 14 of the first mast 10 and the part 18 is supported by the upper part 14 of the second mast 12. The lifting arm 16 is the sole means connecting the first mast 10 and chassis member 11 to the second mast 12 and chassis member 13.
Each part 17 and 18 of the lifting arm comprises a parallelogram linkage 19, to maintain the chassis members 11 and 12 in parallel spaced relationship as the two parts 17 and 18 of the arm 16 pivot relative to one another, and a carriage 20 which is mounted on the upper part 14 of the mast.
As shown in
The upper part 14 of each mast 10, 12 can be raised or lowered relative to the lower part 15 of each mast 10, 12 and the carriages 20 can be raised or lowered relative to the upper mast parts 14 by a mechanism such as is described in EP-A-0424344.
Each chassis member 11, 13 is provided with two castors 21.
The end of one arm of each parallelogram linkage 19 remote from the mast 10, 12 has a worm wheel gear 22. The two worm gears 22 are rotated in synchronism by a worm 23 rotated by a motor 24.
The worm gears 22, worm 23 and motor 24 are all accommodated within a housing 25. It is possible by rotating the worm gears 22 to move the chassis members 11 and 13 towards or away from one another in order to widen or narrow the chassis. When in its widest condition (FIG. 2), the lifting device will straddle obstacles such as a single bed and each part 17, 18 of the lifting arm 16 is typically at an angle of or about 85° to a line extending fore and aft of the lifting device, although the angle could be 90°.
Instead of driving the worm wheel, the chassis members 11 and 13 could be moved towards or away from one another by a chassis drive arrangement as described in our co-pending British Patent Application No. 9806469.4, now published UK Application, GB 2,337,030A, published on Oct. 11, 1999. In this case, the end of one arm of each parallelogram linkage 19 remote from the mast may have a gear which co-operate with one another to ensure that the two parts 17 and 18 of the lifting arm are displaced angularly by equal amounts as the two parts pivot relative to one another. A brake may co-operate with the other arm of each parallelogram linkage 19 to releasably lock the two parts 17 and 18 in a fixed angular position relative to one another.
A sling hanger 26 for supporting a full body sling is suspended from the lifting arm 16 by a sling hanger support 27. The sling hanger 26 is pivotable relative to the sling hanger support 27 about a horizontal axis. The sling hanger 26 and sling hanger support 27 may be of the type described in GB 2184706 or may be a motorised version such as is described in GB 2327931.
The sling hanger 26 and sling hanger support 27 may be replaced by a stretcher support, or by a walking harness, or by a winch.
Referring now to
The embodiments described above are given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention. For example the masts need not be extendible and retractable. Each mast could be a single part mast with a carriage movable up and down the mast.
Greaves, John, Von Schroeter, Philip
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Jul 15 2003 | Arjo. Med. Aktiebolag Limited | (assignment on the face of the patent) | / |
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