U.S. patent number 3,739,406 [Application Number 05/147,734] was granted by the patent office on 1973-06-19 for adjustable bed.
This patent grant is currently assigned to Joh. Stiegelmeyer & Co. GmbH. Invention is credited to Helmut Koetter.
United States Patent |
3,739,406 |
Koetter |
June 19, 1973 |
ADJUSTABLE BED
Abstract
An adjustable bed particularly for use in hospitals and nursing
homes in which a chassis is provided with at least one
telescopically extendable span, a bed frame tiltable relative to
the chassis includes a middle portion and two end portions hinged
to the middle portion, with at least one lifting assembly being
disposed on the chassis at each end of the middle portion of the
bed frame for adjusting the bed frame to various elevated and
inclined positions, and at least one foot for each extendable part
of the span.
Inventors: |
Koetter; Helmut
(Schweicheln-Barmbeck/Westphalia, DT) |
Assignee: |
Joh. Stiegelmeyer & Co.
GmbH (Herford, DT)
|
Family
ID: |
3605019 |
Appl.
No.: |
05/147,734 |
Filed: |
May 28, 1971 |
Foreign Application Priority Data
Current U.S.
Class: |
5/608; D6/383;
5/610; 5/618; 5/149; 5/611 |
Current CPC
Class: |
A61G
7/005 (20130101); A61G 7/002 (20130101) |
Current International
Class: |
A61G
7/005 (20060101); A61G 7/002 (20060101); A47c
003/32 (); A61g 007/10 (); A61g 007/06 () |
Field of
Search: |
;5/61,62,66-69,149 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Claims
I claim:
1. An adjustable bed comprising a chassis provided with at least
one telescopically extendable span defined by a stationary part and
an extendable part, a bed frame tiltable relative to the chassis,
said bed frame including a middle portion and two end portions
hinged to the middle portion, at least one lifting assembly
disposed on the chassis at each end of the middle portion of the
bed frame for adjusting the bed frame to various elevated and
inclined positions, and at least one foot provided on each
extendable part of the span, the chassis including two
telescopically extendable spans, cross-beams carrying feet at their
free ends, said cross-beams being secured to the extendable parts
of the chassis, and the lifting assemblies being arranged between
the stationary parts of the spans.
2. The adjustable bed as claimed in claim 1, in which the lifting
assemblies are provided with outer tubes and the stationary spans
including outer tubes, the outer tubes of the lifting assemblies
being directly connected to the outer tubes of the spans.
3. An adjustable bed comprising a chassis provided with at least
one telescopically extendable span defined by a stationary part and
an extendable part, a bed frame tiltable relative to the chassis,
said bed frame including a middle portion and two end portions
hinged to the middle portion, at least one lifting assembly
disposed on the chassis at each end of the middle portion of the
bed frame for adjusting the bed frame to various elevated and
inclined positions, and at least one foot provided on each
extendable part of the span, said at least one telescopically
extendable including a stationary part and two extendable parts
arranged to be withdrawn from opposite ends of the stationary part.
Description
BACKGROUND OF THE INVENTION
The invention relates to an adjustable bed comprising a chassis a
bed frame tiltable relative to the chassis, at least one linear
actuator disposed on the chassis at each end of the bed, and means
articulatedly connecting the linear actuators to the bed frame so
that the bed frame may be moved to various elevated positions.
PRIOR ART
In known adjustable beds, single or combined control over the
driving assemblies is exercised by means of separately arranged
and/or effective actuating elements. The manipulation of the
setting devices thus becomes too onerous and not quite exempt from
failures. Also complex composite systems, for example
electro-hydraulic assemblies, which contribute to a substantial
increase in the production costs of the sick bed, are employed in a
centrally arranged switching or control system.
The devices employed merely allow vertical adjustment and
ambilateral oblique position setting of the bed frame in the
direction of the longitudinal axis of the bed. A device appropriate
for oblique position setting of the bed frame in its transverse
direction, was lacking.
The adjustable beds known until now form a unit invariable in scope
in their configuration as a whole. The space requirements for the
beds have a highly disadvantageous effect in cases of
non-utilization, storage or standby, and also of cartage.
Accordingly, hospitals and nursing homes strive to keep unoccupied
adjustable sick beds of small bulk on standby or in storage. Beyond
this, there is an incentive to keep the dimensions of unoccupied
sick beds small in order to ensure compact stowage in
transportation means, and in particular in disinfecting
chambers.
Finally, the despatch and storage costs of intermediate storage are
disproportionately high for the known bulky sick beds, in view of
the great space requirement.
SUMMARY OF THE INVENTION
The invention has as its objects a simplication of the method of
operation of the adjusting means and a universal positional
adjustment of the bed frame in the vertical and oblique positions
in the direction of the longitudinal and transversal axes, in
particular by application of substantially less complex actuating
devices as well as a saving of floor and storage space obtainable
in case of need, by structural or spatial shape modifications of
the sick bed when not in use or in storage.
The invention consists in an adjustable bed comprising a chassis, a
bed frame tiltable relative to the chassis, at least one linear
actuator disposed on the chassis at each end of the bed, and means
articulatedly connecting the linear actuators to the bed frame so
that the bed frame may be moved to various elevated positions,
pumping means on the chassis and arranged to actuate at least one
of said linear actuators to operate said movement of the bed frame,
said pumping means including a plurality of actuating pedals.
The invention further consists in an adjustable bed comprising a
chassis, a bed frame tiltable relative to the chassis, at least one
linear actuator disposed on the chassis at each end of the bed, and
means articulatedly connecting the linear actuators to the bed
frame so that the bed frame may be moved to various elevated
positions, and actuating means for displacing said bed frame about
the axis transverse to the longitudinal axis of the bed.
The invention further consists in an adjustable bed comprising a
chassis, a bed frame tiltable relative to the chassis, at least one
linear actuator disposed on the chassis at each end of the bed, and
means articulatedly connecting the linear actuators to the bed
frame so that the bed frame may be moved to various elevated
positions, the bed frame being foldable so as to reduce the space
occupied by the bed.
The invention still further consists in an adjustable bed
comprising a chassis, a bed frame tiltable relative to the chassis,
at least one linear actuator disposed on the chassis at each end of
the bed, and means articulatedly connecting the linear actuators to
the bed frame so that the bed frame may be moved to various
elevated positions, the length of said chassis being
adjustable.
It is thus possible to perform the vertical and oblique position
adjustment of the bed frame in the shortest possible time and
without effort from one position, by means of simple actuating
devices. The oblique position adjustment of the bed frame, at
either end thereof, now rendered possible relative to both axial
directions, in combination with the simplified vertical adjustment
up to the most varied extreme positions, offers increased and
universal applicability of the bed for all medical wards of
hospitals and nursing homes. The production costs are reduced by
the simplicity of the actuating devices.
It is accomplished moreover in advantageous manner that the bed has
a small space requirement when unoccupied.
A considerable saving in space is obtained upon keeping the beds in
store. In sickrooms equipped with two or more beds, so much
additional living space can be produced when a reduction in the
number of patients occurs, that is becomes unnecessary to remove
the bed from the room. Several beds may be treated at the same time
in disinfecting or sterilizing rooms, in thus saving space and
time. It becomes easier and substantially simpler to convey the
empty beds. The saving in costs for packaging and despatch, as well
as for simplified intermediate storage of the beds, is very
considerable.
The possibility of adapting the dimensions of the foldable and
interpenetrable bed frame components to prescribed container
cartage dimensions, is also advantageous.
The invention will be further described by way of example only,
with reference to the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of an adjustable bed with the bed frame
lowered, the elevated position after extension of the linear
actuators being shown in broken lines,
FIG. 2 is a cross-section taken along the line A-B of FIG. 1.,
FIG. 3 is a side view of an adjustable bed with the bed frame in an
oblique position with the head elevated, the opposite oblique
position of the bed frame being shown in broken lines,
FIG. 4 is a plan view of a foot pump complex comprising a multiple
action system of foot pedals,
FIG. 5 is a side view of an adjustable bed incorporating a built-in
setting element for the oblique position adjustment of the bed
frame in its transversel direction,
FIG. 6 is a section taken along the line C-D of FIG. 5 showing in
broken lines the ambilateral oblique positions of the bed
frame,
FIG. 7 is a side view of an adjustable bed with a three-piece
foldable configuration of the bed frame, headboard and with the
footboard in the outwardly folded position, said boards being flush
with the supporting surface of the middle portion in the horizontal
position,
FIG. 8 is a side view of a bed with the back support and the leg
support folded down on to the middle portion,
FIG. 9 is a partial plan view of the frame of the leg support with
a grid base fitted,
FIG. 10 is a side view of the bed structure with the foldable bed
frame and retractable chassis in the operational position,
FIG. 11 is a side view of the bed shown in FIG. 10 with the chassis
retracted and with the head and foot parts of the reclining frame
folded upwards, and
FIG. 12 is a plan view of the bed shown in FIG. 10.
DETAILED DESCRIPTION OF THE INVENTION
The adjustable bed shown in the drawings comprises a bed frame 1
supported on a bed chassis; the bed chassis essentially comprises a
longitudinal member 8 having at each end transverse members 9, 9a.
The bed frame 1 has head and foot portions 2, 3 and is provided
with (FIGS. 1-3) supports 4 articulatedly secured to transverse
support members 5 forming part of the bed chassis. The central
portions of the support members 5 rest on supporting elements 7
which comprise the upper portions of the extensible parts 6a of
linear actuator units 6. At the head and foot ends of the bed
frame, the two actuator units 6 are fixed at their lower ends to
the transverse members 9 and 9a. Castors 10 are arranged at the
ends of the transverse members 9, 9a; a castor setting device 11
acting on single castor or on all the castors is arranged on one of
the transverse members 9, 9a. An actuator unit 6 is articulatedly
connected to the transverse member 9 by means of a ball and socket
joint 12, so that the unit may pivot along the longitudinal axis of
the bed.
On the longitudinal member 8 of the chassis is laterally fastened a
foot pump 15 for operating the hydraulic system of the actuator
units 6; the foot pump is equipped at either side with connecting
pipes 13, 14 (FIGS. 1-3). The foot pump has a multi-action system
of release or actuating pedals 16, 17, 18, 19. When the upper pair
of pedals 16, 17 are actuated at the same time, the reclining
surface or bed frame 1 is raised to the position indicated by
broken lines in FiG. 1. The lowering of the bed frame 1 to its
initial position is performed by simultaneous actuation of the
lower pair of pedals 18, 19.
Separate actuation of the upper left foot pedal 16 (FIG. 4) raises
the head portion of the bed frame, and actuation of the upper right
pedal 17 raises the foot portion. Separate actuation of the lower
left foot pedal 18 causes the lowering of the head portion, and
that of the lower right pedal 19 causes the lowering of the foot
portion of the bed frame 1. The appropriate setting displacements
of the bed frame 1 can thus be performed very rapidly and
conveniently from one position.
A displacing element 20, crank-driven by means of a hand crank 21
(FIGS. 5 and 6) and having an extendible part 23, is employed for
oblique positional adjustment of the bed frame 1 in its transversel
direction. The displacing element 20 is linked to the bed frame 1
by means of holding shackles 22. The extendible part 23 is
articulated to securing shackles 25 fastened on a further
longitudinal member 24 of the chassis.
The oblique positions of the reclining surface or bed frame 1 are
indicated by broken lines in FIG. 6, and are attained by turning
the hand crank 21 respectively clockwise or anticlockwise, to
permit special treatments of patients and facilitate maintenance
work on the bed. The displacing movements of the bed frame 1 are
performed in each case through double pivot bearings 26 arranged
between the actuator units 6 and the bed frame 1 and articulated
thereto. The tilting axis for the bed frame displacement in the
transversal direction is indicated by numeral 27 in FIG. 5.
The adjustable bed may or may not be supplied with the displacing
means for the oblique positional adjustment of the bed frame 1,
depending on the purpose of application. These displacing devices
may also be installed subsequently in existing beds.
In the embodiment according to FIGS. 7 and 8 a back support 105 and
a leg support 106 are fastened to the middle portion 103 of the bed
frame by means of hinges 104 which are situated at either side on
the longitudinal frame members and which permit pivotal movement of
at least 180.degree. or more. Head and foot bows 107 have their
lateral members fastened by means of hinges 111 to the pivotable
frame portions 105/106.
A sleeve 108, longitudinally displaceable on the lateral members or
branches of bow 107, encloses the hinge 111 in such manner that the
bow 107 is secured in rattle-proof manner in the upright
position.
At either side of the leg support frame are supporting links 113
provided with slots adapted to cooperate with clamping capstan head
bolts or screws 114 fastened on the middle portion 103; the links
113 are preferably hinged to swivel out of the way and serve to
secure the leg support 106 in the operational position. The support
106 may, however, also be supported by means of conventional
adjusting devices, to allow an oblique positional setting.
In the embodiment shown in FIGS. 7-9 the back rest is displaced and
supported by means of a known gas pressure spring system 109, 112,
the gas spring 109 being controlled by means of the actuating lever
110. Since the back rest 105, is an extension of the portion 103,
and may be tipped upwards by up to 70.degree. as well as downwards
by approximately 15.degree., a bow 107 at the head end is not
illustrated but one may be fitted if desired.
The length of the chassis corresponds to that of the middle portion
103, whose remote ends with the hinges 104 are set back a little
relative to the castor wheel posts and castor wheels of the
chassis. This prevents the folded reclining frame 103, 105 from
impeding transport and prevents damage to the same.
When the adjustable bed is not in use, the connection between the
linking shackle 112 of the back rest 105 and the gas spring 109 is
disconnected and the back rest is pivoted on to the middle portion
103 in the direction of the arrow. After release of the leg rest
106, or of the screw joint 113, 114, the leg rest 106 is pivoted in
the direction of the arrow to rest on the middle portion 103, after
first folding the foot bow 107 on to the leg rest 106 preceded by
pushing the sleeve 108 upwards (FIG. 8).
All three portions of the reclining frame 103, 105, 106 are
equipped with a grid base 115 which is preferably joined direct to
the corresponding frame in each case. An insert-type reclining
frame corresponding in dimension to the reclining frame portions
103, 105, 106 and preferably wrought in three-piece foldable
configuration, may also be employed complementarily or separately,
without thereby delaying the inward folding of the frame
portions.
In the embodiment illustrated in FIGS. 10-12, a chassis 201 has
fastened or articulated thereto lifting assemblies 202 having
extensible parts has to a middle portion 203 of a reclining bed
frame supported by the chassis. The bed frame also includes a head
portion 205 and a foot portion 206 articulated to the middle
portion 203 preferably by means of adjustable detente or similar
hinges 204. Head and foot bows 207 are foldably connected to the
corresponding head and foot portions 205, 206 by means of hinges
which are each covered by a sleeve 208, ensuring maintenance in the
upright position. All three parts of the reclining frame have a
separate base grid 215.
The lifting assemblies 202 are fastened to middle portions 216 of
the longitudinal members of the chassis 201. The length of the
longitudinal member portions 216 is equal to or approximately equal
to the length of the middle portion 203 of the reclining frame.
Retractable longitudinal member portions 217 situated at either end
may be inserted telescopically into the middle longitudinal member
portions 216, or may be extended outwardly. An immobilizing device
of a known kind arranged on each of the member portions secures the
set position of the longitudinal member portions 216; the remote
ends of members 217 are secured to transverse members 218 equipped
with castors 219. The immobilizing device may be a clamping screw,
eccentric toggle, or the like.
The longitudinally variable configuration of the longitudinal
members, apart from determining a minimum longitudinal dimension of
the adjustable bed, also permits variation of the wheel base of the
castor wheels, so that space for instruments intended for
examination of the patient may be provided beneath the reclining
frame, according to requirements.
The embodiment shows two parallel longitudinal members 216, each
provided with retractable members 217. The chassis 201 may
alternatively comprise a single longitudinal member provided with
one or more retractable members 217.
If two longitudinal members 216 are provided, the transverse
members or crossbeams 218 may each be provided with two retractable
longitudinal member portions 217, as indicated by broken lines in
FIG. 12. An improvement in stability may thus be accomplished with
smaller dimensions of the longitudinal members 216, 217.
The reduction of the longitudinal size of the middle portion of the
reclining frame has the result that the head and foot portions can
be pivoted inwardly only to the erect position or such as to lean
against each other (see FIG. 11). Although this increases the
vertical dimension, this is immaterial since the bed is almost
always handled singly during storage, transport and sterilization,
with the castor wheels on the floor, and is not stacked. The
stacking operation which involved a considerable expenditure of
time and effort has now been eliminated by the very considerable
saving of floor space.
The inward folding of the bed and foot side reclining frame
portions down onto the middle portion, if the head and foot
portions are for example, telescopically insertable and are,
equipped with separate grid or mesh bases in the reclining
portions, or if they are equipped with complementary hinge
fittings.
In the embodiment according to FIGS. 10-12, for the purpose of
articulatedly connecting the middle portion 203 to the head portion
205 and foot portion 206 of the divided bed frame, there are
provided adjustable detent hinges 204, comprising ambilaterally
arranged disc couplings with Hirth denticulations. The adjustment
of the bed frame portions is thus possible in a more a universal
manner, a simplified adjustment to the cardiac position being
obtainable, for example. The upwardly folded position of the head
and foot portions 205, 206 may thus also be secured easily and
automatically without application of complementary immobilizing
means.
FIG. 10 shows the lowered position of the back rest 205, while the
cardiac position of the reclining frame 205, 203, 206 is indicated
by broken lines.
* * * * *