U.S. patent number 3,854,152 [Application Number 05/346,839] was granted by the patent office on 1974-12-17 for apparatus for transferring patients.
This patent grant is currently assigned to Harold A. Ziskin. Invention is credited to David A. Chez.
United States Patent |
3,854,152 |
Chez |
December 17, 1974 |
APPARATUS FOR TRANSFERRING PATIENTS
Abstract
A patient transferring device includes two roller supported
endless belts disposed one above the other. The lower endless belt
drives both belts to the paitent while the upper endless belt is
rotating in the opposite direction via drive means attached to the
plurality of rollers. A slider mechanism supports both belts in the
extended position. The rollers driving the upper endless belt
include universal joints to permit a section of the endless belt to
be raised or lowered to conform the device to the patient's bed.
The end rollers of the upper endless belt can be raised to form a
barrier to prevent the patient from rollihg from the conveyor
during transport. The center of both endless belts are void of
drive rollers to permit the taking of anx-ray of the patient while
the system is in an extended position without interference of the
x-ray by any drive roller.
Inventors: |
Chez; David A. (Phoenix,
AZ) |
Assignee: |
Ziskin; Harold A. (Phoenix,
AZ)
|
Family
ID: |
23361248 |
Appl.
No.: |
05/346,839 |
Filed: |
April 2, 1973 |
Current U.S.
Class: |
5/81.1C |
Current CPC
Class: |
A61G
7/1036 (20130101); A61G 7/1032 (20130101); A61G
7/1057 (20130101); A61G 7/1046 (20130101); A61G
7/1019 (20130101); A61G 2210/50 (20130101); A61G
2200/32 (20130101) |
Current International
Class: |
A61G
7/10 (20060101); A47b 083/04 (); A61g 001/02 () |
Field of
Search: |
;5/66,81,82,84,86
;198/202 ;214/83.36 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Attorney, Agent or Firm: Lindsley; Warren F. B.
Claims
What is claimed is:
1. A self contained patient transferring device for attachment to a
transfer cart having a height-adjustable, horizontal platform
sufficient to hold a patient and wheels for ease of moving the
transfer cart from place to place, said patient transferring device
comprising:
a pair of slider mechanisms;
a plurality of parallel disposed rollers outlining an upper track
and a plurality of parallel disposed rollers outlining a lower
track, all of said rollers journaled to and between said pair of
slider mechanisms, the length of said rollers being sufficient to
support a patient in a prone position along his length and the
rollers of the upper track being displaced along the slider
mechanism sufficient to support his width;
a pair of superposed endless belts, one of said endless belts
stretched around the plurality of rollers outlining the upper track
and a second of said endless belts stretched around the plurality
of rollers outlining the lower track, both of said endless belts
being of sufficient width to cover the rollers;
said pair of slider mechanisms, the pairs of parallel disposed
rollers and the pairs of superposed endless belts forming a
rectangular frame member having a top and bottom and ends;
a common drive means mounted on said frame member connected to said
plurality of rollers outlining the upper track and said plurality
of rollers outlining the lower track to selectively rotate the
upper and lower tracks, said lower track rotating to drive both
tracks to and from an extended position via said slider mechanism
and said upper tracks rotating to place and remove the patient from
the patient transferring device,
a plurality of universal joining means, one for each of the
plurality of rollers of both tracks and all located in the same
vertical plane thereby forming two sections of the upper and lower
tracks; and
means to raise and support one section of the upper and lower
tracks while keeping the second section in the horizontal
position.
2. A patient transferring device according to claim 1 wherein the
plurality of rollers of the upper track and the plurality of
rollers of the lower track are located on the outer edge of the
upper and lower endless tracks to support the patient without
having rollers directly beneath the patient.
3. A patient transferring device for attachment to a transfer cart
having a height-adjustable platform of a length and width
sufficient to support a patient, a section of the platform being
hinged across its width, and wheels for ease of moving the transfer
cart from place to place, said patient transferring device
comprising:
a pair of slider mechanisms, each including an end plate and at
least one slider cooperating with the end plate;
means for fastening the slider of each of the pair of slider
mechanisms to each end of the platform of the transfer cart along
its width;
a plurality of parallel disposed rollers outlining an upper track
and a plurality of parallel disposed rollers outlining a lower
track, all of said rollers journaled to and between the end plate
of said slider mechanisms and each joined by universal joints at
the hinged section of the platform of the transfer cart;
a pair of superposed endless belts, one of said endless belts
stretched around the plurality of rollers outlining the upper track
and a second of said endless belts stretched around the plurality
of rollers outlining the lower track, both of said endless belts
being of sufficient width to cover the rollers and divided at the
universal joints of the rollers to form a first and second section
of the upper and lower tracks;
drive means connected to said plurality of rollers outlining the
upper track and said plurality of rollers outlining the lower track
to selectively rotate the upper and lower tracks, said lower track
rotating to drive both tracks to and from an extended position via
said slider mechanism and said upper tracks rotating to place and
remove the patient from the patient transferring device; and
means to support the hinged section of the platform in the raised
position.
4. A patient transferring device according to claim 3 wherein the
end plate of both slider mechanisms includes a pivotable section
supporting at least one roller of the plurality of rollers of the
upper track on each end of the end plate to form a barrier when in
an upraised position and further including a means to support the
pivotable section while in the barrier position.
5. The self contained patient transferring device set forth in
claim 1 in further combination with:
handle means fastened to the ends of said frame member for ease of
carrying a patient on the patient transferring device; and
casters fastened to the bottom of said frame member for ease of
rolling the device from place to place.
Description
BACKGROUND OF THE INVENTION
This invention relates generally to improved apparatus for moving
objects from one surface area to another and more particularly to
an apparatus for lifting and transferring invalids from a bed to a
cart and vice-versa without requiring manual exertion.
1. Field of the Invention
In hospitals and nursing homes it is required that the patients be
transferred from one surface of rest to another as from a bed to a
wheeled cart, or from a wheeled cart to an operating table or an
x-ray machine or the like. Many of the patients are invalids or
paralyzed and thus cannot assist in the transfer. The patients at
first were manually lifted and transferred. At times, determined
mainly by the weight and condition of the patient, many persons
were required to accomplish this task. It became obvious that
easier means were needed to transfer a patient.
2. Prior Art
Some present-day patient transfer devices comprise a plurality of
rollers supporting an endless belt forming a platform. Many devices
have been designed to accomplish the transfer of a patient from a
bed to a wheeled cart via the endless belts. However, each required
excessive handling of the patient or were not suitable carts for
transferring an ambulant patient without unnecessary
precautions.
Some prior art devices included a pair of superposed endless belts.
The leading edge of the upper belt is rotating in an
upwardly-oriented direction to lift the patient up onto the upper
belt of the transfer device. The lower belt, however, is rigidly
located in the cart and drives the upper belt to and from the
extended position.
SUMMARY OF THE INVENTION
The patient transferring device according to the present invention
is a conveyor type device that, when attached to a well-known
transfer cart presently used in hospitals, shifts the patient from
bed to cart without excessive manual handling. The patient
transferring devices includes two superposed endless belts or
tracks, end-supported by a slider mechanism. Journaled between the
slider mechanism of both endless belts are a plurality of rollers
supporting the endless belts. Separately actuatable drive means
rotate the endless belts in opposite directions.
The lower endless belt drives both belts to the patient. The upper
endless belt rotates in the opposite direction to gently grasp the
patient and transfer the patient to the upper endless belt. The
slider mechanism extends and supports both belts. After the patient
is transferred to the center of the upper endless belt, the drive
to the upper endless belt is disengaged and the drive is reversed
to cause the lower endless belt to drive both belts to the home
position.
In order to adapt the patient transferring device to the contour of
the bed, the upper and lower endless belts are separated into two
sections and universal joining means are employed to permit the
raising of one section of the patient transferring device.
At least one end roller of both sides of the upper endless belt is
fastened to a separate frame pivotably fastened to an end frame
comprising a portion of the slider mechanism. This is to permit
raising and lowering a portion of each end of the upper endless
belt platform. Means are provided to support the pivotably mounted
separate frame in the raised position.
The plurality of rollers of both endless belts are spaced such that
the center of the belt is void of drive rollers. This permits the
taking of x-ray films of the patient while the patient transferring
device is in its extended position.
It is, therefore, an object of the present invention to provide
enhanced apparatus for transferring patients.
It is another object of the present invention to provide an
improved means for transferring a patient to or from a wheeled cart
without manual handling of the patient.
It is another object to provide an improved driven endless belt
conveyor means for transferring patients.
Still another object is to provide an improved endless belt
conveyor means for transferring patients which includes means to
conform the conveyor means to the bed.
Yet another object is to provide an improved endless belt patient
transferring means which includes means for raising and supporting
the ends of the transferring means to prevent the patient from
rolling from the transferring means.
Another object is to provide a patient transferring means that
permits leaving the patient on the transferring means during the
taking of x-ray films.
These and other objects of the present invention will become
apparent to those skilled in the art as the description
proceeds.
BRIEF DESCRIPTION OF THE DRAWING
The various novel features of this invention, along with the
foregoing and other objects, as well as the invention itself both
as to its organization and method of operating, may be more fully
understood from the following description of an illustrated
embodiment when read in conjunction with the accompanying drawing,
wherein:
FIG. 1 is a perspective view of one embodiment of the patient
transferring device adapted to a roll-about cart;
FIG. 2 is a sectional view taken along the lines 2--2 of FIG. 1 and
shows the drive mechanism;
FIG. 3 is a detailed view of the drive gears of FIG. 1 with the
gear cover removed showing the gear arrangement for driving the
drive mechanism of FIG. 2;
FIG. 4 is another view of the drive gears of FIG. 3 with one driven
gear removed from engaging the driving gear;
FIG. 5 is a detailed view of the folding member support as shown in
FIG. 1;
FIG. 6 is a detailed view of a universal joint mechanism usable in
the device according to the present invention as shown in FIG.
1;
FIG. 7 is a detailed view of a clamping mechanism for fastening the
device according to the present invention to the table of a
cart;
FIG. 8 is an end view of a cart containing the device according to
FIG. 1, positioned next to a bed with the device extended over the
bed;
FIG. 9 is a detailed perspective view of the slider mechanism
according to the device shown in FIG. 1;
FIG. 10 is a sectional side view taken along lines 10--10 of FIG.
9; and
FIG. 11 is a perspective view of a second embodiment of the present
invention adapted for use as a stretcher.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1, a typical embodiment of a transporter device
10 in accordance with the present invention is illustrated. This
form of transporter device is especially useful for transferring
and carrying patients or nonambulatory individuals from place to
place. The illustrated device includes a patient transferring
device 12 mounted on a transfer cart 14. The transfer cart 14
includes a platform 16 (see FIG. 7) mounted on wheels or casters 18
so that it may be easily rolled and moved from one location to
another. The transfer cart 14 includes a vertical lifting section
(not shown). The lifting section provides vertical or height
adjustments for the patient transferring device and permits an
adjustment of the patient transferring device to match the height
of an adjoining surface to or from which a patient is to be moved.
The transfer cart 14 does not form a portion of the present
invention and is described here only briefly merely to set the
stage for a later description of the operation of the present
invention.
The patient transferring device 12 according to FIGS. 1 and 2
comprises two tracks or conveyors, an upper track 20 and a lower
track 22, preferably covered by an endless belt of heavy material
such as canvas or rubberized fabric. The tracks encircle a
plurality of rollers 24 extending the length of the patient
transferring device. The rollers 24 therefore should be of a length
sufficient to fully support a patient over his entire length. The
upper track 20 encompasses a plurality of the rollers 24, ten in
number shown in FIG. 1. Five rollers are located to the right and
five to the left of a driving gear 26. An endless chain 28
interconnects the driving gear 26 with a gear 30 fastened to an end
of each of the plurality of rollers 24 in the upper track. The
lower track 22 includes a plurality of rollers 24, four in number
shown in FIG. 2, encircled by a second endless belt. Again this
endless belt can be made from a heavy material such as canvas or
rubberized fabric.
The lower track 22 drive comprises a driving gear 31 driving a
second endless chain 29. The endless chain drives the rollers 24
and the endless belt of the lower track 22 via gears for the upper
track 20. The driving gear 31 is journaled to a shaft 33 which in
turn is fastened to an end frame 36 of a sliding mechanism 34 shown
in FIG. 5. The number of rollers 24 shown supporting the upper and
lower track should not be taken as limiting the present invention.
More or less rollers could be used. The rollers must drive the
tracks and support the patient.
Referring again to FIG. 1, the patient transferring device 12
includes a gearbox 32 for driving the endless chain 28 and 29 and
rollers 24 as shown in FIG. 2. The arrangement of the gears for
driving both the upper and lower track is shown in FIG. 3, while
the gear configuration for driving the bottom track only is shown
in FIG. 4. The rollers 24 are journaled to the end frame 36 of the
sliding mechanism 34 shown only generally in FIG. 1. The
interconnections of the slider mechanism 34 is shown in FIGS. 9 and
10. The interconnection of the rollers 24 with the end frame 36 of
the slider mechanism 34 is shown in FIG. 7.
The patient transferring device 12 is shown in FIG. 1 clamped to
the transfer cart 14. The details of the clamping device are shown
in FIGS. 7, 9 and 10. Referring now to FIG. 7, the clamping device
is adjustable to various lengths and thicknesses of platforms 16 of
different transfer carts. The clamping device includes a bracket 38
fastened to the slider mechanism and an L-shaped channel bracket
40. The L-shaped channel bracket 40 is fastened to the bottom side
of the platform 16 by screws 41 for instance. Bracket 38 fits
within the channel of the L-shaped channel bracket, see FIG. 9. A
plurality of wing nuts 42 hold the bracket 32 firmly within the
channel. The enclosure gear/chain mechanism and slider details are
not shown in FIG. 7 for clarity in showing the fastening of the
patient transferring device to the cart. A similar clamping device
comprising brackets 38 and 40 and wing nuts 42 hold the patient
transferring device to the transfer cart at the opposite end to
that shown in FIG. 1.
Referring again to FIGS. 1 and 2, a folding member support feature
43 of the present embodiment is shown. The end rollers on both
sides of the patient transferring device can be pivoted to raise
both ends of the upper track to form a barrier. A portion 44 of the
end frame 36 to which the rollers 24 are journaled is pivoted at a
pivot point 46 to raise and lower the end rollers. The placement of
the rollers are shown in FIG. 2 in solid lines in its lower or
patient transferring position and in dotted lines on the left side
raised to its upper or barrier position. The lower position is used
while transferring a patient to or from the patient transferring
device and the upper position is used while the patient is being
transported in the transfer cart. The upper position will prevent a
patient from accidentally rolling off the transfer cart. This is
especially important if the patient is agitated and moving about
uncontrollably. The sides of the patient transferring device are
held in an upright position by a spring-loaded bent rod 48 shown in
FIG. 5. A similar spring-loaded bent rod 48 is located at all four
corners of the patient transferring device in order to hold the end
rollers of the upper track on both sides in the barrier
position.
In FIG. 5, the details of one of the folding member supports are
shown. The spring-loaded bent rod 48 is pulled from its home
position 50, dropped to a semi-vertical position, and engages any
one of the small slots 52 to fold the edge of the upper track in an
upper direction to a desired angle. FIG. 5 shows the rod 48
positioned in the barrier position to prevent a patient from
falling from the cart.
Referring again to FIG. 1, the patient transferring device
according to the preferred embodiment is divided into two sections
54 and 56. The first section 54 shown raised in FIG. 1 is used
preferably for the upper portion of the patient to be transferred.
The first section 54 can be raised or lowered to a flat position,
depending upon the position of the bed that the patient is to be
transferred to or from. The section 56 of the patient transferring
device 12 remains in a horizontal position. The sections can be
activated independently through the use of universal coupling means
at the separation point dividing the first section from the second
section. Each of the rollers 24 in both the upper and lower tracks
are fastened together by a universal joint 58. This permits the
raising of the first section 54 while providing a common drive for
the entire track. A detail of one of the universal joints 58 usable
in the present embodiment is shown in FIG. 6. The universal joint
58 of FIG. 6 includes a ball-bearing race 60 which permits smoother
rotation of the rollers. The first section 54 can be held in a
raised position by any number of means including a spring-loaded
bent rod as detailed in FIG. 5 for the folding member support, or
the transfer cart 14 can be built to provide a platform hinged at
the separation, with the platform supporting the first section of
the patient transferring device in both the raised and lowered
positions. The details of the support to hold the first section in
the raised position are believed to be obvious and are not shown
here.
Referring again to FIG. 1, the plurality of rollers 24 included in
the upper track 20 and lower track 22 of the patient transferring
device 12 are journaled to the end frame 36 of the slider mechanism
34 and rotated by the driving system shown generally in FIG. 1. The
driving system includes a fold-away crank 62 and an enclosed gear
and chain system (shown in FIGS. 2, 3 and 4). The details of the
slider mechanism 34 are shown in FIGS. 9 and 10. Referring to FIG.
9, the slider mechanism 34 includes the end frame 36 to which the
rollers 24 are journaled and a plurality of sliders 64 having
support slider wheels 66 snugly fitted into each channel member 70
of the sliders 64. Two sliders are shown in FIGS. 9 and 10, but it
is obvious that perhaps one or many more than two could be used.
The two sliders 64 shown should not be taken as limiting the number
of sliders in the present application.
As the patient transferring device is actuated by turning the crank
handle, the upper track and lower track move to an extended
position from the transfer cart to which the patient transferring
device is clamped as previously described. In the extended position
the upper and lower tracks are supported by the bed or other table
form to which the patient is being transferred, and the slider
mechanism. The slider wheels 66 are journaled to shafts 68 fastened
to the sliders 64 and roll within channels 70 of the slider
mechanism. The slider wheels 66 are held into place within the
channel 70. A slot 72 is formed in the channel 70 to permit the
movement of the wheel 66 within the channel. The two sliders are
fastened together to provide a longer extension of the tracks of
the patient transferring device. A portion of the crank and gear
enclosure 36 serves as part of the inner slider. This portion
includes a slot 74 to receive only one wheel of the inner slider
since at this point of operation, extended over a bed or table, the
weight of the patient transferring device and the patient is
supported by the bed or the table.
The turning of the upper track 20 and lower track 22 via the
rollers 24 is accomplished by the gear and endless chain mechanism
driven by the fold-away crank 62. Although a hand crank is shown in
the figures presently being described, it is obvious that any other
type of driving mechanism can be used such as an electrical motor.
The electrical motor requirements would be that it must be
reversible and be geared down to provide a low number of
revolutions per minute combined with sufficient power to drive all
of the rollers and the tracks with a patient being conveyed by the
tracks.
The gears driving the mechanism of the patient transferring device
are shown in FIGS. 3 and 4 without the gearbox cover 32 shown in
FIG. 1. The gear drive mechanism comprises a large driving gear 76
journaled in the gearbox and fastened to the driving handle 62. Two
intermediate pinion gears 78 and 80 are shown, along with a first
driven gear 82 driven by the second intermediate pinion gear 80.
The first driven gear 82 is fastened to the shaft 33 journaled to
the end frame 36 of the slider mechanism 34. The shaft 33 drives
the gear 31 shown in FIG. 2, and thereby drives the rollers of the
lower track and the track itself via the endless chain 29 and gears
30. A second driven gear 86 of the gear mechanism shown in FIGS. 3
and 4 is shown fastened to a handle 88 which controls the meshing
of the second driven gear 86 with the first pinion gear 78. As
shown in FIG. 4, the second driven gear 86 is fastened to the
handle 88 and to a square rod 90. The square rod 90 couples with
the driving gear 26 of the upper track 20 as shown in FIG. 2. Thus,
if the second driven gear 86 of the gearbox is meshed with the
first pinion gear 78 as shown in FIG. 3, the upper track 20 is
driven in one direction while the lower track 22 is driven in the
opposite direction. If the second driven gear 86 is removed out of
engagement with the first pinion gear 78 by pulling the handle 88,
only the lower track 22 is rotated when the driving handle 62 is
turned.
Referring now to FIG. 8, in employing the patient transferring
device 12 for its intended purpose, as for the transfer of a
patient from a bed 92 to the cart 14 having the patient
transferring device clamped thereto, the cart 14 is rolled to a
position alongside the patient's bed 92. The height of the cart is
adjusted so that the top of the cart is level with the top of the
bed. The first section 54 of the upper track (see FIG. 1) is
adjusted to conform to the position of the bed, that is, if the
upper torso of the patient is elevated by the bed, the first
section of the upper track is elevated to match. An operator then
rotates drive handle 62, or activates the electric motor if an
electric drive is used, to advance the patient transferring device
toward the bed. Thus looking at the patient transferring device as
shown in FIG. 8 and the gear mechanism as shown in FIG. 3 with the
upper track drive gear engaged, the drive handle 62 would be
rotated in the direction of the arrow shown in FIG. 3. The rotation
of the lower track in a counterclockwise direction would cause the
patient transferring device to transfer from the cart to the bed.
The upper track in the meantime is rotating in the oposite or
clockwise direction as viewed from the direction of FIG. 8. As the
drive handle 62 is continually rotated, the upper and lower tracks
are moved in the direction of the patient. When the upper track 20
contacts the patient, the upper track will lift the patient because
the leading edge of the upper track is rotating in an upward
direction. The upper track is continually rotated by the driving
handle and the patient will be gently lifted onto the upper track
while at the same time the lower track is causing the upper track
to be moved in the direction toward the patient.
At this time the slider mechanism 34 of FIGS. 9 and 10 is being
extended away from the cart. The slider mechanism permits the upper
and lower track to be easily conveyed from the table top of the
cart out across the patient's bed. The clamping means shown in
FIGS. 1, 9 and 10 in the meantime holds the channel of one slider,
and thus the patient transferring device, firmly to the table top
of the cart.
Once the patient is located in the middle of the upper track, the
handle 88 fastened to the second driven gear 86, see FIGS. 3 and 4,
is pulled to remove the second driven gear 86 from mesh with the
first pinion gear 78. Thus the upper track drive is disengaged and
only the lower track remains engaged with the driving means, the
drive handle 62 of FIGS. 3 and 4. Drive handle 62 is then rotated
in the opposite direction, opposite to the arrows shown in FIGS. 3
and 4. Rotating the large driving gear in the counterclockwise
direction causes the first driven gear 76 to rotate in a clockwise
direction, thereby causing the rollers 24 of the lower track 22 to
rotate in a clockwise direction via the endless chain 29, see FIG.
2. Rotating the lower track 22 in a clockwise direction causes the
upper and lower track to return to the table top of the cart, all
while keeping the patient in the center of the upper track since
the upper track is no longer moving. Once the upper track
containing the patient is located back over the center of the cart,
the rotation of the driving gear is halted. The folding member
support 43 can then be engaged by lifting the ends of the rollers
and allowing the spring-loaded bent rod 48 to be placed in one of
the slots 52 as shown in FIG. 5. The patient is now ready to be
transported to another bed or to an x-ray table, for instance.
Another feature of the patient transferring device is that no
rollers are located in the center of the device to interfere with
the x-ray film. Therefore, after the patient is transferred from
the bed to the cart via the patient transferring device according
to the present invention, a patient can be transported to the x-ray
room. In the x-ray room the cart is placed directly alongside the
x-ray table, and the patient transferring device is activated as
previously stated. Except in this instance since the patient is
already located on the device, the upper track 20 is left
inactivated by leaving the second driven gear 86 out of engagement
with the first pinion gear 78. Thus as the handle or driving means
causes the large driving gear 76 to rotate in a clockwise
direction, the lower track 22 is rotated in a counterclockwise
direction causing the patient to be conveyed from the cart to the
x-ray table on the upper track 20. The drive handle 62 is turned
until the patient is positioned under the x-ray machine. In this
position, the x-ray technician can take an x-ray picture of the
patient without removing the patient from the patient transferring
device of the present invention since there are no rollers 24 in
the center of the tracks beneath the patient to interfere with the
x-ray film (see cutaway section of FIG. 1). The handling of the
patient is decreased and therefore less harm can come to the
patient. After the x-rays have been taken, the drive mechanism is
actuated in the reverse direction, again leaving the upper driving
mechanism disengaged. The patient is transferred from the x-ray
table back to the cart for transfer directly back to his bed
without requiring a multiplicity of handling of the patient and
without requiring that the patient be removed from the cart because
of possible x-ray interference by the patient transferring
device.
Referring now to FIG. 11, another embodiment of the patient
transferring device 12 is shown in a stretcher concept. Handles 94
have been added to the slider mechanism 36 of the patient
transferring device to permit the carrying of the patient on the
patient transferring device by two attendants, one at each end
holding the handles. The stretcher concept also includes caster
wheels 96 for rolling the stretcher around if possible. The caster
wheels 96 are shown on a frame member that could be similar to the
table top of the cart shown in FIG. 1. The folding member support
feature 43 of the patient transferring device has an added
advantage in the stretcher concept of the present embodiment. The
frame member of the embodiment shown in FIG. 11 could include a
quick disconnect so that the stretcher concept could be placed onto
a cart and fastened to the cart for wheeling the patient to his
room. The patient transferring device could then be activated to
transfer the patient from the cart into the bed, again without
excessive handling of the patient.
The principles of the present invention have now been made clear in
an illustrated embodiment. There will be immediately obvious to
those skilled in the art many modifications of structure,
arrangement, proportions, the elements, materials and components
used in the practice of the invention. For instance, the details of
the rollers as shown in FIGS. 6 and 7 show the rollers made of a
cloth-like material over a rubber covered metal roller. Likewise
the driving mechanism is shown as comprising a drive gear, two
driven gears, and two intermediate pinion gears. It should be
immediately obvious to those skilled in the art that many other
materials could be used for the rollers such as the soft plastics
readily available and that the drive mechanisms could be
independent drives, without interconnection for instance. The
appended claims are, therefore, intended to cover and embrace any
such modifications, within the limits only of the true spirit and
scope of the invention.
* * * * *