|Publication number||USRE39254 E1|
|Application number||US 10/618,697|
|Publication date||Sep 5, 2006|
|Filing date||Jul 15, 2003|
|Priority date||May 30, 1998|
|Also published as||CA2273368A1, CA2273368C, EP0962211A1, US6161232|
|Publication number||10618697, 618697, US RE39254 E1, US RE39254E1, US-E1-RE39254, USRE39254 E1, USRE39254E1|
|Inventors||Philip Von Schroeter, John Greaves|
|Original Assignee||Arjo. Med. Aktiebolag Limited|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (18), Classifications (13), Legal Events (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
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.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2234483||Feb 16, 1938||Mar 11, 1941||Charles H Andre||Invalid carrier|
|US2498853||Nov 7, 1947||Feb 28, 1950||Victor C Hassold||Invalid lifting apparatus|
|US2666930||Sep 9, 1947||Jan 26, 1954||John E Lenahan||Apparatus for handling recumbent persons|
|US3099020||Apr 17, 1961||Jul 30, 1963||William P Davis||Patient-handling apparatus|
|US3820176||Nov 15, 1972||Jun 28, 1974||Gen Electric||Patient handling table|
|US4719655||Sep 2, 1986||Jan 19, 1988||Dean S Brooks||Invalid transfer device|
|US4939801||Dec 22, 1988||Jul 10, 1990||Schaal Gary A||Patient transporting and turning gurney|
|US5423562||Nov 5, 1993||Jun 13, 1995||Pearce, Jr.; Fredric C.||Chair lift|
|US5853015||Dec 7, 1994||Dec 29, 1998||Evans; Allan B.||Lightweight easily transportable personal lifting devices|
|US6047418||Oct 29, 1996||Apr 11, 2000||Arjo Limited||Invalid lifting device|
|EP0424344A1||Oct 17, 1990||Apr 24, 1991||Arjo Hospital Equipment Ab||Lifting appliance, especially for a patient lifting device|
|GB323921A||Title not available|
|GB1159776A||Title not available|
|GB2184706A||Title not available|
|GB2306941A||Title not available|
|GB2327931A||Title not available|
|GB2337030A||Title not available|
|WO1995012514A1||Oct 27, 1994||May 11, 1995||Pearce Fredric C Jr||Chair lift|
|U.S. Classification||5/86.1, 5/83.1|
|International Classification||A61G7/10, A61G7/14|
|Cooperative Classification||A61G7/1046, A61G7/1061, A61G7/1074, A61G7/1019, A61G7/1067|
|European Classification||A61G7/10N6, A61G7/10V4, A61G7/10Z2, A61G7/10S6|
|Jun 19, 2008||FPAY||Fee payment|
Year of fee payment: 8
|Jun 19, 2012||FPAY||Fee payment|
Year of fee payment: 12