U.S. patent number 3,877,089 [Application Number 05/357,681] was granted by the patent office on 1975-04-15 for invalid lift apparatus.
This patent grant is currently assigned to Mercy-Lift, Inc.. Invention is credited to Joseph F. Nemechik, David W. Peters, Joseph Wesley Spivey.
United States Patent |
3,877,089 |
Spivey , et al. |
April 15, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Invalid lift apparatus
Abstract
An invalid lift apparatus for raising an invalid or hospital
patient includes a frame having vertically extending head and foot
support assemblies and a horizontal connecting beam extending
between the head and foot assemblies. A generally rectangular
generally horizontally extending lifting frame or sheet frame is
supported adjacent each end of the connecting beam by telescoping
support tubes mounted on the connecting beam. The telescoping
support tubes are driven by power means on the frame for
selectively extending or retracting each support tube for raising
or lowering one or both ends of the lifting frame. A sheet for
supporting the patient is removably secured to the sides of the
sheet frame by downwardly extending knobs on the frame which are
inserted through slits along the sides of the sheet. The sheet may
be provided with a longitudinally extending central opening to
permit the sheet to be passed around the patient, the opening
ordinarily being closed by a zipper. Hoist means are mounted on the
central portion of the connecting beam, and a lift bar is connected
to the hoist means by a cable or strap. A pair of straps are
attached to each end of the lift bar, and the sheet can be attached
to the straps by disconnecting the sheet from the lifting frame and
attaching a pair of rods to each side of the sheet. The straps on
each end of the lift bar can be attached to the rods on each side
of the sheet, and, since one strap of each pair is shorter than the
other, raising the lift bar by the hoist means will raise the sheet
into a chair-like configuration. The patient can thereby be raised
from a supine position to a sitting position for transfer to a
chair or the like and vice versa.
Inventors: |
Spivey; Joseph Wesley (Lake
Wales, FL), Peters; David W. (Mulberry, FL), Nemechik;
Joseph F. (Mulberry, FL) |
Assignee: |
Mercy-Lift, Inc. (Lake Wales,
FL)
|
Family
ID: |
23406605 |
Appl.
No.: |
05/357,681 |
Filed: |
May 7, 1973 |
Current U.S.
Class: |
5/85.1 |
Current CPC
Class: |
A61G
7/1046 (20130101); A61G 7/1055 (20130101); A61G
7/1019 (20130101); A61G 7/1011 (20130101); A61G
2200/32 (20130101); A61G 2200/34 (20130101) |
Current International
Class: |
A61G
7/10 (20060101); A47c 003/32 (); A61g 001/02 () |
Field of
Search: |
;65/62,81,82,83,85,86-89 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Claims
We claim:
1. An invalid lifting apparatus comprising a frame having a head
end and a foot end, the frame including head support means and foot
support means and connecting means extending between the upper end
of the head and foot support means, first power lift means mounted
on the connecting means adjacent the head end of the frame and
second power lift means mounted on the connecting means adjacent
the foot end of the frame, each of the power lift means including a
generally vertically extending telescoping lift tube extending
downwardly therefrom, a generally rectangular sheet frame attached
to the telescoping lift tubes of the first and second power lift
means, and a sheet attached to the sheet frame for supporting an
invalid, each power lift means being operable to telescopingly
extend or retract the associated lift tube to lower or raise the
sheet frame.
2. The apparatus of claim 1 including reel means mounted on the
connecting means, cables connected to the reel means, a lift bar
having a pair of ends attached to the cable means, a pair of straps
attached to each end of the lift bar, one of the straps of each
pair being longer than the other strap of the pair, and hook means
on the end of each strap whereby a support sheet attached to the
hook means is maintained in a generally chair-like configuration,
and power means connected to the reel means for winding and
unwinding the cable means about the reel means whereby the lift bar
may be raised and lowered.
3. The apparatus of claim 1 in which the sheet frame includes a
pair of elongated side tubes and end tubes extending laterally
inwardly from each end of each side tube, pivotal attachment means
on each of the telescoping lift tubes attached to the end tubes at
each end of the sheet frame, the pivotal attachment means
permitting pivotal movement of each end tube between generally
horizontal and generally vertical positions and pivotal movement of
the sheet frame relative to the telescoping lift tubes as one
telescoping lift tube telescopes relative to the other lift
tube.
4. The apparatus of claim 3 in which each pivotal attachment means
includes a body pivotally attached to the associated lift tube for
pivotal movement about a first axis extending perpendicular to the
axis of the lift tube, the associated end tubes being pivotally
attached to the body for pivotal movement about a second axis
extending perpendicular to the first axis.
5. The apparatus of claim 1 in which at least one of the power lift
means is pivotally mounted on the connecting means whereby said one
power lift means may pivot toward the other power lift means when
the lift tubes telescope relative to each other.
6. The apparatus of claim 1 in which the connecting means includes
a beam having top and bottom walls, at least one of the head and
foot support means including a roller support bar extending toward
the other support means and a pair of rollers rotatably mounted on
the roller support bar and spaced apart along the length of the
bar, the roller support bar and the rollers mounted thereon being
telescopingly received by the beam between the top and bottom walls
thereof.
7. The apparatus of claim 2 including a rod for each of the straps,
each of the rods having means for attaching the rod to the invalid
support sheet and means for attaching the rod to the associated
strap.
8. The apparatus of claim 7 in which the rod for each long strap is
shorter than the rods for the other straps.
Description
RELATED APPLICATION
This application is a continuation-in-part of the co-pending
application entitled "Invalid Lift Apparatus," Ser. No. 163,165,
filed July 16, 1971 now U.S. Pat. No. 3,750,199.
BACKGROUND
This invention relates to a lift apparatus, and, more particularly,
to a lift apparatus particularly suitable for use with invalids or
patients confined to bed.
There is often a need to move or lift an invalid or patient to or
from bed. For example, it may be desirable to elevate the head or
foot of the patient, or both, for examination or other purposes, to
raise the patient into a sitting position, to lift the patient so
that the beddings can be changed, to rotate the patient from back
to stomach or vice versa, to lift the patient completely out of bed
to a wheelchair or the like, or to lift a fallen or injured patient
from the floor to bed. All of the foregoing operations and others
should be performed gradually and smoothly so that the patient is
not discomforted in any way, and the apparatus should perform the
operation automatically so that a nurse, the patient's wife, or any
other non-technical person can safely lift the patient without
physical effort or danger to the patient.
SUMMARY
The invention permits a single person to move an immobilized
patient into a variety of positions without exertion or strain and
without danger to the patient. The lift apparatus moves the patient
safely and smoothly so that the patient is hardly aware of
movement. The head and foot ends of the rectangular sheet frame can
be raised or lowered individually or simultaneously to move the
patient into almost any desired position, and this supporting sheet
may be provided with an elongated central opening which is
releasably closed by a zipper or the like to permit the patient to
be transferred to a bed through the opening. If the patient is to
be raised to a sitting position, the sheet is disconnected from the
rectangular sheet frame, and a pair of rods are attached to each
side of the sheet. The straps at each end of the lift bar are
attached to the rods, and raising the lift bar will gradually and
smoothly raise the patient into a sitting position. As the lift bar
is continued to be raised, the patient will be lifted from the bed
and supported by the sheet, which assumes a hammock-like
configuration from which the patient cannot fall. The patient can
then be lowered into a chair, tub, or the like. The lifting bar can
also be used to raise a fallen patient from the floor.
DESCRIPTION OF THE DRAWING
The invention will be explained in conjunction with an illustrative
embodiment shown in the accompanying drawing, in which
FIG. 1 is a perspective view of an invalid lift apparatus formed in
accordance with the invention;
FIG. 2 is a sectional perspective view of the apparatus taken
generally along the lines 2--2 of FIG. 1;
FIG. 3 is a side elevational view of the apparatus and a hospital
bed showing one end of the sheet frame raised;
Fig. 4 is an elevational view similar to FIG. 3 showing the other
end of the sheet frame raised and the sheet positioned to permit
the use of a bed pan;
FIG. 5 is an end elevational view of one of the end support
assemblies;
FIG. 6 is a fragmentary side elevational view taken along the lines
6--6 of FIG. 5;
FIG. 7 is a top plan view, partially broken away, of the end
support assembly of FIG. 5;
FIG. 8 is a top plan view, partially broken away, of the top
connecting beam;
FIG. 9 is an exploded side elevational view of the top connecting
beam and the three linear actuator assemblies;
FIG. 10 is an enlarged plan view taken along the line 10--10 of
FIG. 9;
FIG. 11 is a sectional view taken along the line 11--11 of FIG.
9;
FIG. 12 is a sectional view taken along the line 12--12 of FIG. 9
showing one of the linear actuator assemblies connected to the top
connecting beams;
FIG. 13 is a fragmentary perspective view of one of the end support
assemblies and the top connecting beam showing the telescoping
relationship therebetween;
FIG. 14 is a fragmentary side elevational view of the sheet
frame;
FIG. 15 is a view similar to FIG. 2 taken through the sheet frame
and showing one end of the sheet frame and its connection to the
telescoping support tube;
FIG. 16 is an enlarged fragmentary view of a portion of the sheet
frame and one of the sheet attaching knobs;
FIG. 17 is an enlarged fragmentary view of a portion of FIG. 15
showing the manner of attaching the sheet;
FIG. 18 is an enlarged fragmentary sectional view taken along the
line 18--18 of FIG. 15;
FIG. 19 is an elevational view of the lift bar and the connecting
straps;
FIG. 20 is a plan view of one of the bars that is attached to the
straps of the lift bar for raising a patient to a sitting
position;
FIG. 21 is a fragmentary view taken along the line 21--21 of FIG.
20;
FIG. 22 is a plan view of the other lift bar which is connected to
the straps of the lift bar;
FIG. 23 is a perspective view, partially broken away, showing the
lift bar raising a patient from a fallen position;
FIG. 24 is a perspective view showing a patient lifted to a sitting
position by the lift bar;
FIG. 25 is a perspective view, partially broken away, showing one
side of the sheet frame pivoted to permit opening of the central
opening in the sheet; and
FIG. 26 is a view of the opposite side of the sheet of FIG. 25
showing the zipper being opened to permit the patient to pass
through the central opening of the sheet onto the bed.
DESCRIPTION OF SPECIFIC EMBODIMENT
Referring first to FIGS. 1--3, the numeral 30 designates generally
a lift apparatus for invalids, immobilized or unconscious patients,
accident victims, etc. For convenience the lift apparatus will be
designated herein as an invalid lift apparatus, but it will be
understood that the lift apparatus has many uses for people other
than invalids. Accordingly, the word "invalid" or "patient" is
meant to include any person whom it is desired to lift with a
minimum amount of movement and discomfort to the patient.
The lift apparatus includes a frame having head and foot end
support assemblies 31 and 32 and a top connecting beam 33 which
extends between the head end and foot end supports, and a lifting
frame or sheet frame 34 which is suspended from the connecting
beam. The sheet frame is generally rectangular, and a support sheet
35 is detachably secured to the sides of the sheet frame for
supporting the patient. The sheet frame is supported by head end
and foot end telescoping support assemblies 36 and 37 which include
electric motors within the connecting beam for extending or
retracting telescoping support tubes. The motors are controlled by
a switch 38 which is connected to the motors by an electric cord
39, and the switch can control each of the motors associated with
the telescoping support tubes so that each support tube can be
extended or retracted individually. FIG. 1 illustrates the sheet
frame in a horizontal position in which both of the support tubes
have been extended equally, and FIG. 3 illustrates the sheet frame
in an inclined position in which the foot end support tube 37 has
been retracted to provide a downward inclination of the patient
from foot to head. If desired, the foot end support tube can remain
extended while the head end tube is retracted as shown in FIG. 4 to
place the patient in an upwardly inclined foot to head position, or
both telescoping supports can be extended or retracted
simultaneously.
Referring now to FIGS. 5.7, the foot end support assembly 32
includes a bottom tube 41 which is supported by a pair of casters
42, a vertically extending upright tube 43, and a pair of braces 44
which extend upwardly from the bottom tubular member 41 parallel
with the upright tube 43 until just below the upper end of the
upright member where they extend inwardly and are connected to the
upright member. A plate 45 is attached to the upper end of the
upright 43 and supports a pair of horizontally extending
spaced-apart parallel bars 46 and 47. The ends of the bars are
joined and reinforced by a cross bar 48. A pair of rollers 49 and
50 are rotatably attached to the bar 46, and a pair of rollers 51
and 52 are rotatably attached to the bar 47. The head end support
assembly 31 is similarly formed.
Referring now to FIGS. 8-12, the connecting beam 33 is seen to be
generally channel-shaped in cross section and includes a top wall
55, a pair of side walls 56 and 57, roller-supporting walls 58 and
59 which extend laterally inwardly from the side walls 56 and 57,
and roller-retaining walls 60 and 61 which extend upwardly
therefrom to provide roller-receiving troughs or guides.
The distance between the roller-supporting walls 58 and 59 and the
top wall 55 is only slightly greater than the diameter of the
rollers 49-52 which are carried by the end support assemblies 31
and 32, and the rollers 49 and 50 are spaced from the rollers 51
and 52 by the support bars 46 and 47 a distance corresponding to
the distance between the roller-receiving troughs. The bars 46 and
47 can thereby be telescopingly received by the connecting beam 33
by inserting the rollers into the roller-receiving troughs and
pushing the upright 43 toward the end of the connecting beam as
shown in FIG. 13. The head end support assembly is similarly
telescopingly connected to the other end of the connecting beam.
The rollers facilitate extension and retraction of the roller
support bars 46 and 47 with respect to the connecting beam, but the
spaced-apart rollers on each support bar serve to securely support
the connecting beam against vertical forces.
A bumper 62 (FIGS. 9 and 13) depends from the top wall 55 of the
connecting beam outwardly of the cross bar 48 and is engageable
with the cross bar to prevent excessive retraction of the roller
support bars from the connecting beam. As will be explained more
fully hereinafter, the telescoping connections between the head and
foot support assemblies and the connecting beam permit the lift
apparatus to be used with beds of varying lengths. A similar bumper
63 is attached to the top wall 55 adjacent the other end of the
connecting beam to prevent excessive withdrawal of the head support
assembly.
The head and foot telescoping support assemblies 36 and 37 are
illustrated in FIG. 9 disconnected from the connecting beam 33. The
particular telescoping support assemblies in the embodiment
illustrated are commercially available linear actuators available
from the Saginaw Steering Gear Division of General Motors
Corporation, Saginaw, Michigan, and a detailed description thereof
is believed unnecessary. Each of the telescoping assembles includes
an outer tubular housing 66 and an inner rod 67 which is
telescopingly mounted within the housing 66. The housing is
attached to a base 68, and the housing encloses means for extending
and retracting the rod 67. In the specific linear actuators
illustrated, the rod is extended and retracted by means of ball
bearing a screw actuator, rotation of the screw causing extension
or retraction of the rod. An electric motor 69 is also mounted on
the base 68 for rotating the screw actuator in either direction.
Each of the motors 69 are connected to the switch 38 through the
cable 39 (FIG. 3).
The telescoping support assembiles 36 and 37 are connected to the
head and foot ends of the connecting beam by attaching brackets 71
and 72, respectively. Referring to FIG. 12, the attaching bracket
72 comprises a pair of bars 72a and 72b which extend downwardly
from the top wall 55 of the connecting beam and which are provided
with bolt openings 72c (FIG. 9) therethrough. A pair of rectangular
plates 73 are welded to opposite sides of the housing 66, and each
plate is provided with a pair of drilled and tapped holes 73a. The
linear actuator 37 is pivotally connected to the brackets by a pair
of bolts 74 (FIG. 12), each of which extends through one of the
bracket bars into one of the plates 73.
The bracket 71 similarly includes a pair of spaced-apart bars, but
the bars of bracket 71 extend downwardly beyond the bracket bars
72a and 72b and are each provided with a pair of volt openings 71a.
A pair of plates 73 are secured to the housing 66 of the linear
actuator 36, and the linear actuator 36 is rigidly secured to the
bracket 71 by using a pair of bolts 74 on each side of the housing,
one pair for each plate 73.
The sheet frame 34 may be seen best in FIGS. 14 and 15. The sheet
frame includes a pair of elongated side tubes 75 and 76 which are
spaced apart approximately the width of a standard hospital bed,
and a pair of somewhat L-shaped end tubes 77 which extend laterally
inwardly from the ends of the side tube 75, and a pair of somewhat
L-shaped end tubes 78 which extend inwardly from the ends of side
tube 76. The inward end of each of the end tubes 77 and 78 is
connected to a pivot assembly 79, and the pivot assembly 79 is in
turn pivotally connected to the rod 67 of the associated
telescoping support assembly.
Referring to FIGS. 15 and 18, the pivot assembly 79 includes a
generally C-shaped body 80 having a pair of laterally outwardly
extending bifurcated end portions 81 and 82. A link 83 is welded to
the end tube 77 and is pivotally secured between the spaced-apart
portions of the bifurcated end portion 81 by a pin 84. Similarly, a
link 85 is connected to the opposing end tube 78 and pivotally
connected to the end portion 82 by pivot pin 86. The rod 67 of the
linear actuator terminates in a lug 87 which is pivotally secured
within a notch 88 by a pivot pin 89.
The end tubes 77 and 78 are prevented from pivoting downwardly
beyond the horizontal positions shown in solid in FIG. 15 by
engagement of the links 83 and 85 with the downwardly extending
central portion of the T-shaped body 80. However, the end tubes can
be individually pivoted upwardly to the upright or vertically
extending positions illustrated in phantom in FIG. 15. A somewhat
U-shaped spring bar 92 is secured to the bottom of the body 80 to
maintain the end tubes in the raised position. The links 83 and 85
flex the upwardly extending ends of the spring bar outwardly
somewhat as the end tubes approach their raised positions, and when
each end tube reaches its vertical position, the associated end of
the spring bar springs back to its original position below the link
to retain the link and the end tube in the raised position. The end
tubes can be pivoted downwardly merely by pulling down on the side
tubes, which will cause the ends of the spring bar to flex
outwardly.
Each of the side tubes 75 and 76 of the sheet frame is provided
with a plurality of downwardly extending sheet-attaching lugs or
hooks 95. Referring to FIGS. 16 and 17, each lug includes a
generally spherical knob 96 and a stud 97 which is welded to the
side tube. As can be seen in FIG. 14, the spacing between the
sheet-attaching lugs in the central portion of the side tubes is
about half the spacing between the lugs in the outer one third end
portions for a purpose to be explained hereinafter.
The fabric sheet 35 is provided with a plurality of button holes or
slits 99 (FIG. 17) along each longitudinal side thereof, and each
opening may be reinforced by stitching 100. The spacing between the
button holes corresponds to the spacing between the sheet-attaching
lugs, and the sheet can be quickly and easily attached to the sheet
frame simply by extending each longitudinal side edge of the sheet
outwardly and downwardly around one of the side tubes 75 and 76 and
pressing the sheet upwardly against the bottom of the side tubes so
that the lugs are forced through the button holes. When a downward
force is exerted on the center of the sheet, as when a patient is
being supported by the sheet, the lugs firmly anchor each
longitudinal edge of the sheet. Referring to FIG. 17, laterally
inward tension on the sheet will cause the sheet to ride upwardly
on the stud 97 and prevent the sheet from becoming detached from
the lug. The enlarged knob 96 further insures against detachment of
the sheet from the lugs, particularly when no tension is being
exerted on the sheet, since the slits in the sheet will not pass
downwardly over the enlarged knob without some manipulation. When
removal of the sheet from the sheet frame is desired, however, the
sheet can be detached from the lugs quickly and easily simply by
pulling the longitudinal edges of the sheet downwardly over the
knobs.
The sheet 35 is comprised of a pair of halves which are releasably
joined by fastening means such as a zipper 101 which extends along
the longitudinal center line of the sheet.
A third linear actuator assembly 105 (FIGS. 9 and 10) is secured to
the midportion of the connecting beam 33 by a bracket 106. The
linear actuator assembly 105 is similar to the linear actuator
assemblies 36 and 37 and includes a base 107, an electric motor
108, and a tubular housing 109. However, rather than having a
cylindrical rod, the linear actuators 105 includes a rack 110 which
is telescopingly mounted within the housing 109 and which is
extended or retracted by the screw actuator within the housing. The
rack 110 meshes with a pinion 111, and the pinion 111 and a pulley
or reel 112 are rotatably mounted within the connecting beam 33 by
an axle 113. Although the pinion and pulley may rotate relative to
the connecting beam, they are fixed relative to each other either
by a direct connection or by being splined to the shaft 113. As the
rack 110 is extended by the screw actuator, the pinion and the
pulley rotate in one direction, and as the rack retracts, the
pinion and pulley rotate in the opposite direction. The rack and
pinion are enclosed within a housing 114 (FIG. 2) which encases the
rack and pinion in oil and which is secured to the connecting beam
33.
The pulley raises and lowers a lift bar 115 illustrated in FIGS. 19
and 24. One end of a cable or strap 116 is attached to the central
portion of the lift bar 115, and the other end of the strap is
secured to the pulley 112. The end portions of the lift bar 115
extend downwardly slightly from the central portion of the bar, and
a set 117 of attaching straps is secured to the lift bar adjacent
each end. Each set of attaching straps includes a long strap 118
and a short strap 119, and a fastener or hook 120 is secured to the
end of each strap.
As will be explained more fully hereinafter, the lift bar 115 is
used in connection with a pair of rods 122 (FIG. 20) and a pair of
rods 123 (FIG. 22) which are shorter than the rods 122. In the
specific embodiment illustrated, each of the rods 122 is 32 inches
long and includes four sheet-attaching lugs 95 identical to the
sheet-attaching lugs 95 of the sheet frame. An eye hook 125 is
secured to the center of the rod and extends perpendicularly to the
sheet-attaching lugs. In the embodiment illustrated, the rods 123
are 18 inches long and include two sheet-attaching lugs 95 and a
central eye hook 125 which extends perpendicularly to the attaching
lugs.
When the lift bar is not being used, the motor of the center linear
actuator 105 is operated by the switch 38 to wind the strap 116
about the pulley 112, and the lift bar can be stored on a storage
rack 126 (FIGS. 3 and 4) which extends downwardly from the
connecting beam 33. Although in the specific embodiment
illustrated, a linear actuator was used to rotate the pulley, other
power means for rotating the pulley can be used. We have found,
however, that the linear actuator provides safe, smooth raising and
lowering of the lift bar.
Housings 127 and 128, are attached to the connecting beam 33 for
enclosing the linear actuator assemblies 36 and 37, respectively,
and the housing 128 may be somewhat larger than the housing 127 to
provide a storage space for an extra sheet 35' (FIG. 2). Cover
plates 130 (FIG. 2) are secured to the bottom of the connecting
beam between the housings 127 and 128 to enclose the bottom of the
beam.
OPERATION
When it is desired to lift a patient lying on a bed B (FIG. 3) the
apparatus is rolled on its casters with both halves of the sheet
frame in the raised position illustrated in phantom in FIG. 15 so
that the head support assembly 31 and the foot support assembly 32
straddle the head and foot of the bed. The length of the lifting
apparatus can be adjusted to accommodate the length of the bed by
extending or retracting the roller-supporting bars 46 and 47 of
either or both of the head and foot support assemblies. A
handle-equipped bolt 131 extends downwardly through the housing 128
and is engageable with the roller support bar 46 to releasably lock
the roller-supporting bars in the desired position relative to the
connecting beam 33. If the patient is lying on a sheet 35 equipped
with botton holes along the sides, the sheet frame can be secured
to the sheet by moving each of the pivotable halves of the sheet
frame into its horizontal position and operating the head and foot
linear actuators if necessary to position the sheet-attaching lugs
of the sheet frame adjacent the sides of the sheet. The sheet can
then be attached to the sheet frame by means of the button holes
and the lugs.
Thereafter, the head end linear actuator 36 can be powered to raise
the head end of the sheet frame and the head of the patient P, the
foot end actuator assembly 37 can be operated to raise the foot end
of the sheet frame and the foot of the patient, or both linear
actuators can be operated simultaneously to raise the patient in a
horizontal position. If the patient is to be transported, for
example to radiology, surgery, or the like, both linear actuators
are operated to raise the patient off of the bed, and the lifting
apparatus can then be wheeled away from the bed to the desired
destination. If additional safety precautions are desired,
reinforcing straps can be secured to the side tubes of the sheet
frame by means of the lugs below the sheet at longitudinally spaced
locations. The sheet 35 alone will, however, safely support a
considerable amount of weight.
If it is desired to return the patient to an ordinary bed sheet,
for example, after changing the bed linen, the sheet frame is
lowered until the patient is supported by the bed. Since the center
of the hammock-like sheet 35 is below the side tubes of the sheet
frame, the side tubes can remains slightly above the bed.
Thereafter, the patient is rolled to one side as shown in FIG. 25,
and the opposite side tube of the sheet frame is raised toward a
horizontal position. Since other side tube is slightly above the
level of the bed, the patient is maintained in a hammocklike pouch
formed by the sheet and the side tube without danger of rolling off
of the sheet or over the side tube. The zipper 101 is then pulled
as shown in FIG. 26 to separate the two halves of the sheet.
Thereafter the patient is rolled back to a supine position in which
he overlies only a portion of one of the detached sheet halves and
is then rolled on his other side to permit withdrawal of that sheet
half. Both of the side tubes of the sheet frame can then be pivoted
to their vertical positions, and the lifting apparatus can be
wheeled away.
If it is desired to lift a patient who is resting on an ordinary
bed sheet rather than a sheet 35 provided with button holes, the
reverse procedure is followed. The patient is rolled to one side,
and one of the detached sheet halves is positioned behind him. The
patient is then rolled to the other side so that he rests on that
sheet half, and the other sheet half is placed on the bed and
connected to the first half by the zipper. The patient is returned
to a supine position, and the lifting apparatus can then be wheeled
in place and the sheet frame can be lowered and connected to the
sheet.
If it is desired to position the patient for bed pan use, a sheet
35 is positioned under the patient as just described and the
lifting apparatus is wheeled in place about the bed. The buttocks
of the patient will be positioned in the middle portion of the
length of the sheet and the sheet frame, and the head end of each
side of the sheet is attached to the sheet frame down to the base
of the spine. The patient's legs are then raised slightly to pull
the foot end of the sheet forwardly so that, in the illustration
given, the first button hole at the foot end of the sheet can be
secured to the second sheet-attaching lug on each side. One or two
adjacent button holes can then be attached to the next lugs to
support the calf portion of each leg, but the portion of the sheet
between the knees and the base of the spine will remain unattached.
The head end linear actuator assembly 36 is then operated to raise
the head of the lifting frame, and the upper body of the patient is
securely supported by the upper half of the sheet. The lower half
of the body is supported by the foot end of the sheet which
supports the legs and by the bed since the patient's feet remain in
contact with the bed.
The unattached portion of the sheet drapes downwardly below the
buttocks to form a pocket, and the bed pan can be inserted in the
pocket from the side between the patient and the sheet. The
sheet-attaching knobs 95 are located relatively close together
along the central portion of the side tubes to permit the central
portion of the sheet to be adjusted as desired relative to the side
tubes depending upon the exact position of the patient.
As can be seen in FIGS. 3 and 4, when one end of the sheet frame is
raised higher than the other end, the distance between vertical
lines extending through the ends of the sheet frame will decrease.
The pivotal attachment of the linear actuator assembly 37 to the
connecting beam permits this linear actuator assembly to pivot
toward the head end to accommodate the reduced horizontal dimension
between the head and foot ends of the sheet frame. We have found
that permitting pivotal movement of only one of the linear actuator
assemblies is sufficient, and the other linear actuator is
maintained stationary by the use of four attaching bolts 74 as
previously described.
The lifting apparatus can also be used to lift a person from the
ground or the floor. This might be desired, for example, when an
invalid falls to the floor or at the scene of an accident when it
is desired to move a victim having undetermined injuries with as
little manipulation as possible. Referring to FIG. 23, the patient
P is first positioned on the sheet 35 by using the side-to-side
technique previously described, and one of each of the rods 122 and
123 of FIGS. 20 and 22 are attached along each side of the sheet.
Each of the rods are attached by placing the rod below the side
edge of the sheet with the attaching lugs thereof extending
upwardly and the eye hook extending outwardly. The lugs inserted
upwardly through the button holes of the sheet and then rotating
the rod 270.degree. to roll the sheet thereabout until the eye hook
can be inserted into a slit formed in the sheet inwardly of the
button holes for this purpose. A long rod 122 is attached to the
sheet adjacent the head end thereof on each side, so that the long
rod extends generally from the lower back of the patient to the
head. Each short rod 123 is attached along the central portion of
the side edge of the sheet adjacent the upper leg of the patient,
and the ends of the rods 122 and 123 on each side of the sheet are
spaced apart by leaving at least one button hole unused.
The lifting apparatus is then wheeled in place over the patient,
and the center linear actuator is operated to lower the strap 116
and the lift bar 115 until the straps 118 and 119 can be secured to
the rods 122 and 123. Each of the long straps 118 is attached to
the eye hook 125 of one of the short rods 123 by the hook 120, and
each of the short straps 119 is attached to eye hook 124 of one of
the long rods 122.
The center linear actuator is then operated to wind the strap 116
about the pulley 112 to raise the lift bar. As the lift bar is
raised, the long rods 122 are raised before the short bars by
virtue of the shorter connecting straps 119, and the patient is
slowly raised to a sitting position. Continued upward movement of
the lifting bar will then raise the short rods 122 which are
attached to the straps 118 and which extend adjacent the upper
legs, and the patient will be lifted from the floor in a sitting
position as shown in FIG. 24. The straps 118 and 119 hold the rods
in a V-shaped relationship to form a V-shaped hammock-like sling
which safely and securely holds the patient, with the patient's
buttocks in the bottom portion of the sling. The lower legs of the
patient extend downwardly beyond the portion of the sheet which is
supported by the rods 123, but the patient is maintained in a
perfectly relaxed, normal sitting position. The lifting apparatus
can then be wheeled to a bed and the patient can be lowered onto
the bed by lowering the lifting bar 115. The patient is returned
smoothly and comfortably in the reverse manner of the lifting
procedure. The slight downward curvature of the lift bar 115 from
the center to the ends insures that the center of the lift bar is
positioned well above the head of the patient.
If it is desired to lift the patient into a wheelchair, tub, or the
like from either a bed or the floor, the patient is first raised to
the sitting position illustrated in FIG. 24, and a chair is
positioned below the patient. The lift bar 115 can then be lowered
to lower the patient into the chair.
While in the foregoing specification a detailed description of a
specific embodiment of the invention was set forth for the purpose
of illustration, it is to be understood that many of the details
herein given may be varied considerably by those skilled in the art
without departing from the spirit and scope of the invention.
* * * * *