Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1994-11-21
1997-03-04
Matecki, Katherine
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254316, B66D 160
Patent
active
056071426
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a lifting apparatus capable of shifting a load from one support means to another.
BACKGROUND
There are needs in many contexts for a lifting apparatus which is arranged so that, while carrying a load, it may be moved from a first suspension device to a second suspension device. There are also often needs in this art to be able to move a load from one level to another.
Examples of practical applications where this need exists are where goods are to be moved through an intake or discharge opening in a wall, when the opening is located above ground level and the wall above the opening separates an outer suspension device from a suspension on device located inside the opening. It is obvious that a corresponding need exists when a load is to be moved from one loading apparatus to another, for example from a conveyor path suspended in a ceiling to a mobile hoist or crane, transfer of a patient sitting in a harness from one conveyor path to another conveyor path, to a bed, to a wheelchair, etc.
SUMMARY OF THE INVENTION
The present invention seeks to provide an apparatus which satisfies the above-disclosed needs. According to the invention, such apparatus comprises a frame supporting a carrier for a load, two rotary drums carried by the frame to which are secured respective flexible lines each having an end for suspension from an overhead support. The drums are each rotatable in opposite directions to wind up or pay out the respective line to raise or lower the load. A switching device is supported by the frame for each respective drum to switch the drum to a first position in which the drum is interconnected with a prime mover to rotate the drum in one direction or the other. When one drum is engaged with the prime mover the other drum can be disengaged to effect a switching operation and transfer of the frame from one overhead support to the other.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described in greater detail hereinbelow, with reference to the drawings, in which:
FIG. 1a is a vertical section taken along the line 1a-1a in FIG. 1b through one embodiment of an apparatus according to the present invention in a first working position;
FIG. 1b is a horizontal section taken along the line 1b-1b in FIG. 1a of the apparatus according to FIG. 1a;
FIG. 2a is a vertical section taken along the line 2a-2a in FIG. 2b with the apparatus in a second working position;
FIG. 2b is a horizontal section of the apparatus taken along the line 2b-2b in FIG. 2a;
FIG. 3a is a vertical section taken along the line 3a-3a in FIG. 3b, but with the apparatus in a third working position;
FIG. 3b is a horizontal section of the apparatus taken along the line 3b-3b in FIG. 3a;
FIGS. 4a and 4b are vertical sections and horizontal sections, respectively, of the apparatus corresponding to those shown in FIGS. 1a-b, but with the left- and right-hand sections of the Figures separated and with the right-hand section of Figures partly cut away;
FIGS. 5a and b are vertical sections and horizontal sections, respectively, corresponding to that shown in FIGS. 4a-b but with the apparatus in the second working position; and
FIGS. 6a and b are vertical sections and horizontal sections, respectively, corresponding to those shown in FIGS. 4a-b, but with the apparatus in the third working position.
DETAILED DESCRIPTION
The Figures of the drawings show a lifting apparatus 1 carrying a load 2 and arranged to be connected to coupling devices 4a,b which, in the Figures, are shown as secured to a ceiling 3 on either side of a wall 5 located beneath the ceiling. The space located beneath the walls example, correspond to a door opening.
The lifting apparatus 1 includes a frame 30, a carrier device 12 for carrying the load 2 and two separate suspension devices 11a,11b. The suspension devices are arranged so as to be able to be interconnected with the coupling devices 4a,b. In the Figures, the coupling devices 4a,b are shown as hooks, and the suspension devices 11a,b are
REFERENCES:
patent: 353564 (1886-11-01), Kamm et al.
patent: 684872 (1901-10-01), Sarazin
patent: 1259445 (1918-03-01), Rees
patent: 1265612 (1918-05-01), Cocke
patent: 1771281 (1930-07-01), Wilsing
patent: 2221359 (1940-11-01), Nesbitt
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