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Патент USA US3026552

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March 27, 1962
P. C. TABBERT
3,026,542
HOSPITAL STRETCHER
Filed Oct. 22, 1959
2 Sheets-Sheet l
March 27, 1962
3,026,542
P. C. TABBERT
HOSPITAL STRETCHER
Filed Oct. 22, 1959
2 Sheets-Sheet 2
INVENTOR.
p00L 6'
BY
'
1“
Q
United States Fatent @ftice
2
1
3,026,542
Paul C. Tabbert, Bridgman, Mich, assignor to Tahhert
HOSPITAL STRETCHER
Manufacturing Company, Bridgman, Mich, a corpora
tion of Michigan
3,026,542
Patented Mar. 27, 1962
»
Filed Oct. 22, 1959, Ser. No. 848,063
13 Claims. (Cl. 5-86)
justing crank 23. The crank is rotatably and axially and
?xedly supported in a swivel bearing 24 carried by the
post 15 so that rotation of the crank 23 moves the block
20 along the adjusting screw and adjusts the position of
the hinged portion 17 of the platform.
Also desirably but not necessarily the platform 12 car
ries side guard rails 25 that have support arms 26 ex
tending laterally inwardly from their lower edges and
pivotally connected as at 27 to the cross members 14.
This invention relates to improvements in hospital
stretcher. The principal objects of the invention are:
10 Releasable spring catches 28 on the arms 26 are engage
First, to provide a novel form of a wheeled hospital
stretcher which facilitates movement of patients in various
angularly adjusted positions and which can be moved into
overlapping relation with a bed for transfer of patients
between the bed and the stretcher.
able with the rim 13 of the stretcher to hold the side rails
erected or to permit their collapse below the platform of
the stretcher. Due to the support of the platform 12
from its transverse center it is possible to lower one side
rail and roll the stretcher sideways until the side edge of
the platform overlies a hospital bed or other support for
easy transfer of patients between the bed and the stretcher.
Vertical adjustment of the platform 12 on the base 1
tudinal angle of the platform to be adjusted independently
and the columns 6 and 7 is effected by a pair of primary
and in which the adjustable supports are relatively narrow
to leave an unoccupied space underneath the side edges 20 support levers 29 and 30. The support levers are pivotal
Second, to provide a novel form of support for the plat
form of a stretcher which permits the elevation and longi
ly connected at their adjacent ends as at 31 and are sup
of the platform.
ported for limited longitudinal movement and vertical
swinging movement by the links 32 pivotally mounted on
a mounting plate 33 secured to the top of the longitudinal
ment, angular adjustment and hydraulic operation of the 25 base bar 1 of the chassis of the structure. The mounting
plate 33 may be added to an existing stretcher in which
vertical adjusting means.
the posts 15 and 16 had previously been ?xedly connected
Other objects and advantages of the invention will be
to the uprights 6 and 7. The mounting plate 33 carries
apparent from a consideration of the following descrip
Third, to provide a stretcher which can be made and
purchased originally as a ?xed stretcher and later con
verted as desired to add the functions of vertical adjust
tion and claims.
The drawings, of which there are two
a central guide upright 34 with a transverse slot 35 there
sheets, illustrate a highly practical form of the stretcher 30 through and the pivot 31 travels in the slot 35. As ap
pears most clearly from FIGS. 2, 3 and 4 the primary
and one modi?ed form of vertical adjusting mechanism
support levers 29 and 31!‘ each consist of two transverse
therefor.
ly spaced bars that are lapped on opposite sides of the
FIG. 1 is a fragmentary side elevational view of the
upright 34.
stretcher in one elevated and angularly tilted position of
A direct support link 36 is pivotally connected to one
adjustment.
35
primary support lever as at 37 and extends upwardly to
FIG. 2 is a fragmentary end elevational view of the
a pivot pin 38. The pin 38 passes through an arcuate
stretcher in horizontal position.
slot 39 provided therefor in the plates 8 and 9 of the up
FIG. 3 is a fragmentary cross sectional view taken
right 6 and also passes in pivotally supporting relation
along the plane of the line 3-3 of FIG. 1.
through the post 15. It will be seen that raising or lower
FIG. 4 is a fragmentary cross sectional view taken along
ing the primary support lever 29 will necessarily raise or
the plane of the line 4-4 in FIG. 1.
lower the post 15 and the right end of the platform as
FIG. 5 is an enlarged fragmentary side elevational view
appearing in FIG. 1. The other end of the platform
of the elevating mechanism for the stretcher.
is supported by a toggle link consisting of the toggle sec
FIG. 6 is a fragmentary transverse cross sectional view
tions 41} and 41 pivotally connected at their adjacent ends
taken along the plane of the line 6——6 in FIG. 1.
FIG. 7 is a fragmentary side elevational view of a
by the pivot 42. The lower toggle section 49 is pivotally
connected at 43 to the primary support lever 31) and the
upper toggle section 41 is pivotally connected at 44 to the
The stretcher is supported upon a base or chassis con
underside of the platform. The toggle sections 40 and 41
sisting of a longitudinal bar 1 of rectangular cross sec
tion and transverse cross bars 2. The ends of the cross 50 are adjustably secured against collapse by a second ad
modi?ed form of elevating mechanism for the stretcher.
bars support vertical bearings 3 for the yokes 4 of castor
wheels 5. At one end of the base is an upright column 6
and at the other end there is an upright column 7. The
column 6 consists of laterally spaced side plates 8 and 9
while the column 7 consists of laterally spaced side plates
10 and 11. (See FIGS. 3 and 4.)
The platform 12 of the stretcher is supported by a
suitable rim 13 and cross members 14, one of which ap
pears in FIG. 6. Depending from the cross members
14 are a ?rst post 15 cooperative with the upright 6 and
a second post 16 cooperative with the upright 7. As ap
pears most clearly from FIGS. 2, 3 and 4 the posts 15
and 16 are positioned between and laterally retained by
the side plates 8, 9, 10 and 11 of the uprights.
Desirably but not necessarily the platform 12 has
justing crank 45 having a threaded section 46 engaged
transversely through the pivot 42 and having its other end
rotatably and axially ?xed in the post 15 as at 47. (See
FIG. 2.) It will thus be seen that elevation of the toggle
sections 40 and 41 by the primary support lever 31} will
elevate the left end of the platform appearing in FIG. 1.
A guide link 48 connected to the primary support lever
30 at the pivot 43 extends upwardly to a pivot 54} passed
through an arcuate slot 51 that is provided therefor in
the side plates 10 and 11 of the upright 7. The pivot
50 also passes through an arcuate slot 52 in the post 16
and so does not perform any supporting function for the
platform 12.
For ease in elevating the platform 12 as a unit a hy
draulic power unit 53 may be mounted on the longi
tudinal base bar 1. The hydraulic unit includes a power
a hinged section 17 connected to the remainder of the
cylinder 54 and piston rod 55 connected by the yoke 56
platform by a transverse hinge indicated at 18 in FIG. 1.
to the primary support lever 29. The pump cylinder 57
The underside of the hinged section 17 carries the tri
of the hydraulic unit has its piston connected by the
angular framework 19 with a bearing block 2i) at its
lower corner. The block 20 rotatably supports a trans 70 yoke 58 to a pump lever 59‘ pivotally supported from
the bottom of the base bar 1. An operating pedal 60 on
verse rod 21 and the rod is in turn transversely bored
the end of the lever 59' is exposed at the end of the
and tapped to receive the threaded portion 22 of an ad
3,026,642
4
3
stretcher for easily building up pressure in the cylinder
2. A hospital stretcher comprising a central longitudinal
54 to in turn elevate the platform. The hydraulic power
unit further includes a valve illustrated conventionally at
61 for regulating the escape of ?uid from the power
bar with cross bars on each end constituting a base, wheels
cylinder 54 to permit lowering of the stretcher platform.
The valve 61 is controlled by the lever ‘62 having an
supporting the ends of said cross bars, part of said wheels
being castor mounted, ?xed upright columns on the ends
operating button or toe pad 63 exposed near the end of
the stretcher.
of said ?rst bar and consisting of laterally spaced side
plates with slots in their upper ends, a platform having
longitudinally spaced posts depending from its underside
intermediate of its side edges and laterally retained be
The hydraulic elevating and regulating mechanism may
tween said side plates, a tiltable section in said platform
be added as an improvement to a stretcher having the 10 hinged to the remainder of the platform, means for tilt
elevating mechanism described. A less expensive mecha
nism for elevating the platform of the stretcher is illus
trated in FIG. 7 in which the upright 34A is provided
with a ?xed nut 64 at its top engageable with the threaded
portion of an elevating crank 65. The lower end of the
crank 65 is rotatably but axially ?xedly connected to the
pivot 31A that connects the primary support levers 29 and
3t). Rotation of the crank 65 raises and lowers the pri
mary supporting levers for vertical adjustment of the
ing said tiltable section including an adjusting screw and
crank rotatably supported on one of said posts, elevating
mechanism including a mounting plate connected to said
?rst bar between said columns and having an upright
with a transverse guide slot therein, links pivoted on said
mounting plate at each end thereof, primary support
levers pivotally connected at their adjacent ends by a pivot
guided in said guide slot and swingably supported inter
The stretcher can thus
mediate of their ends on said links, a direct support link
connected bet-ween the end of one of said primary sup—
be sold initially with the posts 15 and 16 ?xedly bolted
to the uprights 6 and 7. Later the mounting plate 33
port levers and one of said posts by a pivot passed through
the slot in one of said columns, a toggle link including
with the primary support levers 25! and 30 and the crank
65 can be added for screw adjustment of the platform of
the stretcher. If still greater ease and power operation
of the platform is desired, the hydraulic unit 53 can be
added to perform the function of the screw crank 65.
pivotally connected toggle sections having the opposite
platform as has been described.
What is claimed as new is:
l. A hospital stretcher comprising a central longitudinal
bar with cross bars on each end constituting a base,
wheels supporting the ends of said cross bars, part of
said wheels being castor mounted, ?xed upright col
umns on the ends of said ?rst bar and consisting of later
ally spaced side plates with slots in their upper'ends con
ends of its said toggle sections connected to the end of
the other primary support lever and the other of said
posts at a point above the other of said columns, a guide
link connected between said other primary support lever
and said other post by a pivot passed through said slot
in said other column and through said other post, said
other post having a slot therein passing said last pivot,
a second adjusting screw and crank rotatably mounted
in said one post and threadedly engaged with said toggle
link adjacent its pivot to vary the length of the toggle
link and tilt the platform about the pivotal connection
cave towards the slots in the columns at the opposite 35 between the direct support link and the ?rst post, and
end of the stretcher, a platform having longitudinally
means for adjusting the primary support levers on said
spaced posts depending from its underside intermediate of
its side edges and laterally retained between said side
?rst bar including a hydraulic cylinder and piston mount
plates, a tiltable section in said platform hinged to the re
levers, said cylinder having a pump and valve associated
mainder of the platform, means for tilting said tiltable
section including a threaded block swivelly carried by
the tiltable section below its hinge connection and an
adjusting screw and crank rotatably supported on one of
said posts and threaded through said block, elevating
mechanism including a mounting plate connected to said
?rst bar between said columns and having an upright
with a transverse guide slot therein, links pivoted on
ed on said ?rst bar and connected to one of said primary
therewith with actuating foot pedals for the pump and
valve.
3. A hospital stretcher comprising a central longi
tudinal bar with cross bars on each end constituting a
base, wheels supporting the ends of said cross bars, part
of said wheels being castor mounted, ?xed upright
columns on the ends of said ?rst bar with slots in their
upper ends concave toward the slots in the column at
said mounting plate at each end thereof, primary support
the opposite end of the stretcher, a platform having longid
tudinally spaced posts depending from its underside inter-i
pivot guided in said guide slot and swingably supported 50 mediate of its side edges and in laterally retained rela-'
levers pivotally connected at their adjacent ends by a
intermediate of their ends on said links, a direct sup
port link connected between the end of one of said pri
mary support levers and one of said posts by a pivot
passed through the concave slot in one of said columns, a
tion to said columns, a tiltable section in said platform
hinged to the remainder of the platform, means for tilting
said tiltable section including a threaded block swivelly
carried by the tiltable section below its hinge connection
toggle link including pivotally connected toggle sections
and an adjusting screw and crank rotatably supported on
having the opposite ends of its said toggle sections con
nected to the end of the other primary support lever and
one of said posts and threaded through said block, elee
vating mechanism connected to said ?rst bar between
the other of said posts at a point above the other of said
said columns and having an upright with a transverse
guide slot therein, links pivoted on said ?rst bar at each
coluriins, a guide link connected between said other pri
mary support lever and said other post by a pivot passed 60 side of said upright, primary support levers pivotally
connected at their adjacent ends by a pivot guided in said
through said slot in said other column and through said
guide slot and swingably supported intermediate of their
other post, said other post having an arcuate slot herein
ends on said links, a direct support link connected be
passing said last pivot, a second adjusting screw and crank
rotatably mounted in said one post and threadedly en
gaged with said toggle link adjacent its pivot to vary the
length of the toggle link and tilt the platform about the
pivotal connection between the direct support link and the
?rst post, and means for adjusting the primary support
tween the end of one of said primary support levers and
one of said posts by a pivot passed through the concave
slot in one of said columns, a toggle link including pivot
ally connected toggle sections having the opposite ends
of its said toggle sections connected to the end of the
other primary support lever and the other of said posts
and piston mounted on said ?rst bar with its piston con- < 70 at a point above the other of said columns, a guide link
connected between said other primary support lever
nected to one of said primary levers, said cylinder hav
and said other post by a pivot passed through said slot
ing a pump and valve associated therewith with actuating
in said other column and through said other post, said
foot pedals for the pump and valve accessible at the end
other post having an arcuate slot therein passing said last
of the stretcher.
75 pivot, a second adjusting screw and crank. rQtatably
levers on said ?rst bar including a hydraulic cylinder
3,026,542
6
mounted in said one post and threadedly engaged with
said toggle link adjacent its pivot to vary the length of
the toggle link and tilt the platform about the pivotal
connection between the direct support link and the ?rst
post, and means for adjusting the primary support levers
ing longitudinally spaced posts depending from its un
derside and laterally retained by said columns, elevating
on said ?rst bar including a screw and crank mounted
mechanism connected to said base between said columns
porting the ends of said base, part of said wheels being
castor mounted, ?xed upright columns on the ends of
said base with slots in their upper ends, a platform hav
on said upright and connected to one of said primary
and having an upright with a transverse guide slot therein,
levers.
pivot mounted on said base at each end of said upright,
4. A hospitial stretcher comprising a central longi
primary support levers pivotally connected at their ad
tudinal bar with cross bars on each end constituting a 10 jacent inner ends by a pivot guided in said guide slot and
base, wheels supporting the ends of said cross bars, part
of said wheels being castor mounted, ?xed upright
columns on the ends of said ?rst bar with slots in their
upper ends concave toward the slots in the column at
swingably supported intermediate of their ends on said
pivots on said base, a direct support link connected be
tween the outer end of one of said primary support levers
and one of said posts by a pivot passed through the slot
the opposite end of the stretcher, a platform having 15 in one of said columns, a toggle link including pivotally
longitudinally spaced posts depending from its underside
connected toggle sections having the opposite ends of
intermediate of its side edges and in laterally retained
its said toggle sections connected to the outer end of the
relation to said columns, elevating mechanism connected
other primary support lever and the other of said posts,
to said ?rst bar between said columns and having an up
a pivot passed through said slot in said other column and
right with a transverse guide slot therein, links pivoted
through said other post, an adjusting screw and crank
on said ?rst bar at each side of said upright, primary
support levers pivotally connected at their adjacent ends
rotatably mounted in said one post and threadedly en
gaged with said toggle link adjacent its pivot to vary the
by a pivot guided in said guide slot and swingably sup
length of the toggle link and tilt the platform about the
pivotal connection between the direct support link and
the ?rst post, and means for adusting the primary sup
ported intermediate of their ends on said links, a direct
support link connected between the end of one of said
primary support levers and one of said posts by a pivot
passed through the concave slot in one of said columns,
a toggle link including pivotally connected toggle sec
tions having the opposite ends of its said toggle sec
tions connected to the end of the other primary support 30
port levers on said base.
7. A hospital stretcher comprising a base, wheels sup
porting the ends of said base, part of said wheels being
castor mounted, ?xed upright columns on the ends of
said base, one of said columns having a slot in its upper
lever and the other of said posts, a pivot passed through
'end, a platform having longitudinally spaced posts de
said slot in said other column and through said other
pending from its underside and laterally retained by said
post, an adjusting screw and crank ro-tata'bly mounted in
columns, elevating mechanism connected to said base be
said one post and threadedly engaged with said toggle
tween said columns including an upright with a transverse
link adjacent its pivot to vary the length of the toggle 35 guide slot therein, spaced pivots on said base toward
link and tilt the platform about the pivotal connection
each end thereof, primary support levers pivotally con
between the direct support link and the ?rst post, and
nected at their adjacent ends by a pivot guided in said
means for adjusting the primary support levers on said
guide slot and swingably supported intermediate of their
?rst bar.
'
ends on said spaced pivots, a direct support link con
5. A hospital stretcher comprising a base, wheels sup
nected between the end of one of said primary support
porting the ends of said base, part of said wheels being
levers and one of said posts by a pivot passed through
castor mounted, ?xed upright columns on the ends of
the slot in said one of said columns, a toggle link in
said base and consisting of laterally spaced side plates
cluding pivotally connected toggle sections having the
with slots in their upper ends, a platform having longi
opposite ends of its said toggle sections connected to the
end of the other primary support lever and the other
tudinally spaced posts depending from its underside and
laterally retained between said side plates, elevating
mechanism connected to said base between said columns
and having an upright with a transverse guide slot there
in, pivots mounted on said base at each end of said up
right, primary support levers pivotally connected at their
adjacent inner ends by a pivot guided in said guide slot
and swingably supported intermediate of their ends on
of said posts, means including a pin and slot connection
vertically adjustably guiding said other post on said other
column, an adjusting screw and crank rotatably mounted
in said one post and threadedly engaged with said toggle
link adjacent its pivot to vary the length of the toggle
link and tilt the platform about the pivotal connection
between the direct support link and the ?rst post, and
said pivots on said base, a direct support link connected
means for adjusting the primary support levers on said
between the outer end of one of said primary support
base including a hydraulic cylinder and piston mounted
levers and one of said posts by a pivot passed through 55 on said ?rst bar and connected to one of said primary
the slot in one of said columns, a toggle link including
levers, said cylinder having a pump and valve associated
pivotally connected toggle sections having the opposite
therewith with actuating foot pedals for the pump and
ends of its said toggle sections connected to the outer
valve.
end of the other pn'mary support lever and the other of
8. A hospital stretcher comprising a base, wheels sup
said posts at a point above the other of said columns, a 60 porting the ends of said base, part of said wheels being
guide link connected between said other primary sup
castor mounted, ?xed upright columns on the ends of
port lever and said other post by a pivot passed through
said base, one of said columns having a slot in its upper
said slot in said other column and through said other
end, a platform having longitudinally spaced posts de
post, an adjusting screw and crank rotatably mounted
pending from its underside and laterally retained by said
in said said one post and threadedly engaged with said 65 columns, elevating mechanism connected to said base
toggle link adjacent its pivot to vary the length of the
between said columns including spaced pivots on said
toggle link and tilt the platform about the pivotal con
base toward each end thereof, primary support levers
nection between the direct support link and the ?rst
pivotally connected at their adjacent ends and swingably
post, and means for adjusting the primary support levers
supported intermediate of their ends on said spaced pivots,
on said base including a hydraulic cylinder and piston 70 a direct support link connected between the end of one
mounted on said base and connected to one of said pri
of said primary support levers and one of said posts by a
,mary levers, said cylinder having a pump and valve as
pivot passed through the slot in said one of said columns,
a toggle link including pivotally connected toggle sections
sociated therewith with actuating foot pedals for the
having the opposite ends of its said toggle sections con
pump and valve.
6. A hospital stretcher comprising a base, wheels sup 75 nected to the end of the other primary support lever and
3,026,542
8
the other of said posts, means including a pin and slot
crank rotatably mounted on said one post and having a
connection vertically adjustably guiding said other post
screw shaft threadedly engaged With said toggle sections
on said other column, an adjusting screw and crank ro
adjacent their pivotal connection.
tatably mounted in said one post and threadedly engaged
with said toggle link adjacent its pivot to vary the length
of the toggle link and tilt the platform about the pivotal
hydraulic cylinder and piston connected between said base
and one of said primary support levers, and a hydraulic
connection between the direct support link and the ?rst
post, and means for adjusting the primary support levers
levers on said base.
11. A stretcher as de?ned in claim 9 and including a
pump and valve connected to said cylinder to adjust said
12. A stretcher as de?ned in claim 9 in which said
9. A stretcher comprising a wheeled base, a centrally 10 primary levers and said supporting links are connected to
disposed upright at each end of said base, a platform pro
said base and posts as a unit attachable after assembly of
vided with depending longitudinally spaced posts having
said platform and posts on said base and said uprights.
sliding and tilting connections to said uprights, means for
13. A stretcher as de?ned in claim 12 in which said
vertically adjusting said platform mounted on said base
unit including said primary levers has an upright with a
and supportingly connected to said posts, and means for 15 guide slot therein receiving and guiding the pivotal con
tiltingly adjusting said posts on said supporting means and
nection between said primary levers, and a crank ro
thereby tiltingly adjusting said platform, said means for
tatably mounted on said upright and having a screw shaft
on said base.
vertically adjusting said platform and supporting said
connected to said primary levers to adjust said levers rela
posts include primary levers pivotally connected at their
tive to the upright.
adjacent ends and pivotally connected intermediate of 20
their ends to said base, a direct support link connected
References Cited in the ?le of this patent
between the swinging end of one of said levers and one
of said posts, and other link means connecting the swing
ing end of the other of said levers and the other post.
10. A stretcher as de?ned in claim 9 in which said 25
means for tiltably adjusting said posts includes pivotally
connected toggle sections for said other link means and a
UNITED STATES PATENTS
2,471,901
2,587,094
Ross ________________ __ May 31, 1949
Berg et al _____________ __ Feb. 216, 1952
2,905,952
Reichert et a1. ________ __ Sept. 29, 1959
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