U.S. patent application number 11/651662 was filed with the patent office on 2007-08-02 for system for exercising the lower extremities in seated persons.
Invention is credited to Jose Luis Galvez Campos.
Application Number | 20070179411 11/651662 |
Document ID | / |
Family ID | 27240814 |
Filed Date | 2007-08-02 |
United States Patent
Application |
20070179411 |
Kind Code |
A1 |
Galvez Campos; Jose Luis |
August 2, 2007 |
System for exercising the lower extremities in seated persons
Abstract
A system is provided for persons who must remain seated for
extended periods of time, such as persons working in offices and
the like. The system includes one or two support surfaces for the
feet of the user, which are moved by a motor driven base. The
support surfaces perform an alternating longitudinal movement, a
lifting and lowering movement or a movement combining the two
movements. The support surfaces are moved by, in one example,
support rods hingedly connected to a central point of the support
surfaces and at the other end to eccentric pivots allocated to
respective toothed wheels which are mounted so at to rotate about
their respective axis. An intermediate motor-driven pinion conveys
rotational movement in the opposite direction to the wheels and are
placed between the wheels. The support surfaces may be a bar that
is transverse relative to the motor-driven base, which is
preferably used in mass transit vehicles such as motor coaches,
airplanes, etc.
Inventors: |
Galvez Campos; Jose Luis;
(Zaragoza, ES) |
Correspondence
Address: |
SCHIFF HARDIN, LLP;PATENT DEPARTMENT
6600 SEARS TOWER
CHICAGO
IL
60606-6473
US
|
Family ID: |
27240814 |
Appl. No.: |
11/651662 |
Filed: |
January 10, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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10433927 |
Oct 9, 2003 |
7179236 |
|
|
PCT/ES01/00235 |
Jun 7, 2001 |
|
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11651662 |
Jan 10, 2007 |
|
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Current U.S.
Class: |
601/29 ; 482/70;
601/35 |
Current CPC
Class: |
A61H 2201/1215 20130101;
A61H 1/0255 20130101; A63B 22/0058 20130101; A61H 2201/164
20130101; A61H 2201/1676 20130101; A61H 2203/0431 20130101; A61H
2209/00 20130101 |
Class at
Publication: |
601/029 ;
601/035; 482/070 |
International
Class: |
A63B 69/18 20060101
A63B069/18 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 7, 2000 |
ES |
P200002939 |
Jan 26, 2001 |
ES |
P200100182 |
Feb 27, 2001 |
ES |
P200100462 |
Claims
1-9. (canceled)
10. A system for exercising lower extremities of a seated person,
comprising: a motorized base having a housing; a wheel mounted to
be driven by said motorized base; an eccentric pivot mounted on
said wheel; a connecting rod connected to said eccentric pivot; a
radial arm connected to said connecting rod; two supports on said
housing in a longitudinal and median alignment; a freely rotatable
axle held in said two supports; a transverse support firmly joined
to said freely rotatable axle; and said support surfaces firmly
joined to ends of said transverse support to that said support
surfaces rock laterally and jointly with said axle.
11. A system for exercising lower extremities of a seated person,
comprising: a motorized base having a housing; two supports
extending from said motorized base in longitudinal and median
alignment; a longitudinal axle on said two supports; a connecting
rod connected at one end of said longitudinal axle; a drive wheel
connected to drive said connecting rod; a first transverse am
firmly connected to said longitudinal axle a second axle on said
two supports under said first transverse arm; a second transverse
arm firmly connected to said second axle, said second transverse
arm being parallel to said first transverse arm; and vertical arms
joining respective ends of said first transverse am to said second
transverse arm; said support surfaces having said respective
vertical arms emerging from lower faces of said support surfaces,
said first and second transverse arms and said vertical arms
forming a deformable parallelogram in which said vertical arms
retain verticality during rocking of said first and second
transverse arms delivered by rocking of said longitudinal axle.
12. A system for exercising lower extremities of a seated person,
comprising: a motorized base; a support surface for a user's feet
including a support bar with an external jacket which turns freely
with respect to said support bar; two arms connected by a common
turning axle and having said support bar mounted between respective
ends of said two arms; a joining connecting rod connected to an
opposite end of one of said two arms; a rotating wheel connected to
said joining connecting rod by an eccentric; and a drive driven by
said motorized base and connected to said rotating wheel so that
movement is transmitted so that a user's feet rested on said
support surface are subject to movement, said movement being at
least one of vertical movement and horizontal movement and rocking
movement.
13. A system as claimed in claim 12, wherein said one of said two
arms is substantially straight.
14. A system as claimed in claim 12, wherein said one of said two
arms is angled.
15. A system for exercising lower extremities of a seated person,
comprising: a motorized base having a housing; a wheel mounted to
be driven by said motorized base; an eccentric pivot mounted on
said wheel; a connecting rod connected to said eccentric pivot at a
first end and having a second end with a pivot; and a support
surface mounted on said housing for sliding movement and connected
to said pivot at said second end of said connecting rod so that a
user's feet rested on said support surfaces are subject to
movement, said movement being at least one of vertical movement and
horizontal movement and rocking movement.
16. A system for exercising lower extremities of a seated person,
comprising: a motorized base having a housing; a transverse axle
connected to be driven by said motorized base; two wheels coupled
to said transverse axle for rotation; two eccentric pivots mounted
on respective ones of said two wheels; and two support surfaces
connected to respective ones of said two eccentric pivots, said two
support surfaces providing surfaces on which feet of a user are
rested to provide movements of the user's feet, said movements
being at least one of vertical movement and horizontal movement and
rocking movement.
17. A system for exercising lower extremities of a seated person,
comprising: a motorized base having a housing; a wheel mounted to
be driven by said motorized base; an eccentric pivot mounted on
said wheel; a connecting rod connected to said eccentric pivot; a
radial arm connected to said connecting rod; two supports on said
housing in a transverse alignment; a freely rotatable axle held in
said two supports, said radial arm being connected to said freely
rotatable axle; and a support surface for a user's feet fixed to
said freely rotatable axle so that a user's feet rested on said
support surface are subject to movement, said movement being at
least one of vertical movement and horizontal movement and rocking
movement.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a Divisional Application of application
Ser. No. 10/433,927, filed Oct. 9, 2003, which is incorporated
herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates generally to a system that has
been specially designed so that a user who has to remain in the
seated position on account of the nature of the user's work may
exercise the user's lower extremities in the course of the working
day with the resultant beneficial effect that this has on the
user's general state of health and without impairing job
performance.
[0004] 2. Description of the Related Art
[0005] As is common knowledge, physical exercise is absolutely
fundamental for maintaining a good state of health. Although
certain working activities entail the necessary practice of
physical exercise, there are however an increasing number of people
who have to remain seated behind a computer, an office desk, etc.
during practically the whole working day, performing wholly
intellectual tasks with practically no physical exercise,
especially at lower limb level.
[0006] This physical inactivity has a negative impact on health in
the course of time creating situations of discomfort, fatigue, leg
pains, etc.
[0007] The obvious solution to this problem is to carry out
physical exercises outside working hours and in this respect there
are people who devote a certain time every day to walking or
performing different types of physical exercises, but obviously
such person make up a minority group, as the vast majority do not
have the time or means to perform such exercises.
[0008] There are numerous kinds of gymnastic apparatus, but none of
them allows a person to carry out a certain physical exercise while
working.
SUMMARY OF THE INVENTION
[0009] The system proposed by the invention provides a fully
satisfactory solution to the afore-mentioned problem inasmuch as it
permits the lower limbs to be exercised on the job during working
hours. As pointed out above, the system does not interfere with the
normal performance of the job to be done insofar as it is designed
for persons who remain seated, i.e. for people whose legs are not
involved in the work being done and which may therefore be
mobilized, within certain limits, without affecting body stability
and, therefore, without affecting the individual work rate.
[0010] For this purpose and more specifically the system consists
of a motor-driven base for positioning under the desk, a
motor-driven base which moves at least one support surface for the
user.sup.ts feet, which are thus subjected to a mobilization that
extends to the whole of the lower extremities.
[0011] This mobilization may be simultaneous for both feet, i.e.
they move together, specifically when they are resting on a single
support surface, or their movements may be independent, alternating
for instance, when two support surface, one for each foot, play a
part in the system.
[0012] At the same time, the movement may also be of different
types, specifically a longitudinal sliding movement of the feet, a
lifting movement, a rocking movement or a mixed movement resulting
from the combination of the foregoing.
[0013] In any case, the motor-driven base will conveniently support
the bearing surfaces with freedom of movement for these and the
driving element of the base will be connected to the support
surface or surfaces by conventional type driving means which enable
the desired movement to be performed.
[0014] In the various embodiments it is possible to achieve new
movements or movement which may already be known by new means.
[0015] More specifically, one of the new possibilities envisaged
consists of establishing on the motor-driven base a pair of
longitudinally aligned vertical axles on each of which transverse
and parallel rocking arms are mounted, which in turn are linked
hingedly to the underside of the support surfaces, forming with
these a deformable quadrilateral, while linked hingedly to one of
these arms there is a connecting rod that links this quadrilateral
to the motor-driven wheel eccentric to operate the assembly,
thereby achieving an alternating longitudinal movement of the
aforesaid support surfaces or, in other words, of the user's
feet.
[0016] Another alternative provides a lifting and lowering movement
for the feet, accompanied by a lateral rocking movement of same, in
which case the support surfaces are fixed to a transverse support
integral with a longitudinal axle mounted with freedom of movement,
by way of a pair of bearings, on the motor-driven base, the
aforesaid axle, by way of an eccentric piece, a connecting rod and
another eccentric mounted on the driving wheel, an alternating
rotational movement which is translated into a lateral rocking
movement for the assembly made up of the two support surfaces,
which may optionally be embodied in just one.
[0017] If the aim is for the movement of the bearing surfaces to be
alternating and vertical only, i.e. without lateral rocking for
such surfaces, a similar solution to that just described here may
be used, with the exception that instead of using a rigid
transverse connection support between the two bearing surfaces, two
parallel arms should be used, hinged at their mid-point, one to the
drive shaft and the other to a mere support shaft and linked in
turn hingedly at their ends to lower vertical arms of the bearing
surfaces, the latter forming a deformable parallelogram which
permits the raising and lowering of the bearing surfaces without
their losing, in turn, their horizontally.
[0018] Lastly, the bearing surface or surfaces may be provided
solely with a longitudinal rocking movement, i.e. a raising and
lowering movement of the area corresponding to the anterior
extremity of the feet, in which ease the bearing surface will be
provided with a traverse shaft, offset to the rear, mounted with
rotational freedom on the motor-driven base
[0019] and integral with which there is a descending intermediate
connecting rod, linked hingedly at its free end to another
longitudinal connecting rod linked to the driving wheel
eccentric.
[0020] In the event of the system being applied on collective
transport vehicles, instead of there being a single support
platform for the feet or else separate platforms, the supports are
composed of a single transverse bar, which is driven back and forth
or else rocked, or in other words, is raised and lowered with a
rocking movement.
[0021] More specifically, in this alternative embodiment or
application the principle of the system is that two separate
parallel supports are mounted on the motor-driven base, preferably
matching end parts of the base, and between the supports of which a
traverse rotational shaft is mounted so that on this rotational
shaft two side arms are mounted in turn, provided on the inside
with supports, one of which is linked to a connecting rod, which is
hinged eccentrically at its other end to a drive wheel, so that the
alternating movement of this connecting rod entails the alternating
movement of the arm to which the former is associated and thereby
the rotation of the shaft between the base supports, at the same
time bringing about the movement of the other arm, so that between
both arms a bar is mounted which will form the support element for
the feet, the bar being supplemented with an encasing tube turning
freely on them, so that when rocking back or forth takes place it
causes the casing to turn and thereby provides pennanent support
for the user's feet without varying their position, i.e. moving
back and forth in unison with their support on the bar.
[0022] In another embodiment version, besides turning back and
forth, the arms may carry out an upward and downward rocking
movement as these arms are made up of two parts both connected to
the transverse rotational shaft mounted between the supports.
[0023] In the former case of the two solutions just referred to,
the bar ad therefore the feet resting on it undergo a back and
forth movement with a slight arching in that forward and backward
longitudinal movement, while in the latter case the bar undergoes a
raising and lowering movement, or in other words, rocking up and
down, naturally in a slightly arched movement as in the previous
case.The present invention provides an apparatus for.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] To supplement the description being given and in order to
assist a clearer appreciation of the features of the invention, in
accordance with a preferential specimen of practical embodiment of
same, a set of drawings is attached wherein, for illustrative and
not restrictive purposes, the following is represented:
[0025] FIGS. 1A and 1B show a side elevational view and top plan
view of a first practical embodiment of the system for exercising
the lower extremities at static work stations which represents the
object of the present invention, in which tow support surfaces take
part and where the movement of the surfaces is longitudinal and
alternating.
[0026] FIGS. 2A and 2B show a side elevational view and a top plan
view, according to a representation similar to that of FIGS. 1A and
1B, an alternative embodiment version in which a single bearing
surface participates, provided also with an alternating
longitudinal movement.
[0027] FIGS. 3A and 3B show a side elevational view and a top plan
view of an embodiment version, according to a representation
similar to that of the previous figures, in which two bearing
surfaces participate, which in this case are subjected both to a
longitudinal movement and to a raising and lowering movement.
[0028] FIGS. 4A, 4B and 4C show two side elevational views and a
top plan view of another embodiment version in which two bearing
surfaces also participate, but in this case affected by a combined
longitudinal and rocking movement.
[0029] FIGS. 5A, 5B and 5C show two side elevational views and a
top plan view of a representation similar to that of FIG. 4A, 4B
and 4C but corresponding to another way of obtaining movements
similar to those of the last case.
[0030] FIGS. 6A and 6B show a side elevational view and a top plan
view of a representation similar to that of FIG. 3A and 3B but
corresponding to another way of obtaing movements similar to those
of the aforesaid FIGS. 3A and 3B
[0031] FIGS. 7A and 7B shows a side elevational view and a top plan
view of an alternative embodiment of the system.
[0032] FIGS. 8A, 8B and 8C show two side elevational views and a
top plan view of another alternative embodiment of the system.
[0033] FIGS. 9A, 9B, 9C, 10A, 10B and 10C in turn show two side
elevational views and a top plan view similar to that of FIGS. 8A,
8B and 8C, referring to respective versions of practical
embodiments of the system.
[0034] FIGS. 11A and 11B shows a side elevational view and a top
plan view of a practical alternative embodiment of the lower
extremity exercising system, applicable primarily to transport
vehicles, without ruling out its use or application anywhere else.
In these figures we may see the direction of longitudinal forward
movement of the bar forming the support for the feet.
[0035] FIGS. 12A and 12B shows the same side elevational and plan
views as the embodiment represented in the previous figure,
indicating the direction of backward movement of the foot support
bar.
[0036] FIGS. 13A, 13B, 14A and 14B show respective pairs of
elevational and lateral views, respectively, of another alternative
embodiment in which instead of moving forward and backward the foot
support bar rocks in an ascending and descending direction.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0037] If we refer in the first place to FIGS. 1A and 1B, we see
that the practical embodiment of the system for exercising the
lower limbs advocated here consists of a housing or motor-driven
base 1, on which are mounted, with the option of longitudinal
sliding, a pair of support surfaces 2, suitable in shape and size
to take the users feet, moving longitudinally and in opposing
directions in accordance with the arrows referenced with 4, for
which purpose and by way of the respective connecting rods 5,
linked hingedly at 6 to the mid-point of the support surfaces 2 are
connected by respective toothed wheels 7, mounted with rotational
freedom by way of their shafts 8 on the actual base or housing 1,
toothed wheels 7 to which the connecting rods 5 are linked by way
of an eccentric pivot 9, the two toothed wheels 7 corresponding to
the two support surfaces 2 being furthermore joined together by
means of an intermediate pinion 10, which is what receives the
movement of the corresponding motor, not represented in the drawing
and which supplies rotational movements to the wheels 7 in the
opposite direction in order to achieve alternating movements at the
support surfaces 2 of an extent close to the diameter of the wheels
7 and in opposite directions.
[0038] The layout described is basically repeated in the practical
embodiment represented in FIGS. 2A and 2B, in which there is a
single support surface 3 for both feet, with the evident difference
that in this case there will be a single connecting rod 5 and a
single wheel 7 as well, which in this case will not be toothed and
which will receive the movement directly from the motor by way of
its own shaft 8.
[0039] In FIGS. 3A and 3B another embodiment version is represented
in which two support surfaces 2 participate, as in the case of
FIGS. 1A and 1B, although in this case the support bases 2 linked
to respective supports 13 which are moved by a pair of transverse
drive axles 11 and 12, provided at their wheel ends with eccentric
pivots 14 and 15, whereby, in addition to the same longitudinal
movement as in the case of FIGS. 1A and 1B, a vertical movement is
achieved between the end situation shown with a continuous and
dotted line in the lateral view in this FIGS. 3A and 3B.
[0040] With the participation also of two support surfaces 2, the
embodiment of FIGS. 4A, 4B and 4C envisage the existence of a
single motor-drive transverse shaft 16 terminated at each end with
a wheel provided with respective opposing lugs 17, by way of which
movement is transmitted to the support surfaces 2 relatively close
to one of their ends, while their other end rests on the actual
motor-driven base 1 by way of sliding supports 18, so that an
upward/downward rocking movement of one of the ends of each support
surface 2 is achieved, while the other end is kept at a constant
height level, in parallel to a horizontal movement of the support
surface.
[0041] In the embodiment in FIGS. 5A, 5B and 5C similar movements
are achieved to those obtained in FIGS. 4A, 4B and 4C, but more
extensive in the horizontal or longitudinal movement of the support
surfaces 2, for which purpose the structure of the embodiment in
FIGS. 1A and 1B is repeated, as regards the existence of the hinged
pivots 6, the toothed wheels 7 and the drive pinion 10, but with
the exception that in this case the swivel pivots 6 can rock
sideways, for example by means of a cardan drive or
90.degree.-hinged rocker arm, where the base or housing 1 has a
ramp 19 and each support surface 2 has a pair of longitudinally
spaced lower lugs 20 and 21, the pivot being designed to coincide
with the ramp 19 in order to make the support surface 2 rock, as
represented in the two side elevational views in the
afore-mentioned FIGS. 5A, 5B and 5C.
[0042] In the embodiment shown in FIGS. 6A and 6B, in which also
two support surfaces 2 participate, each of the support surfaces 2
is connected to the housing or base 1 by means of two pairs of
connecting rods 31, hinged at their ends 32 both to the support
surface 2 and to the housing 1, as may be seen especially in the
side view, there being linked to the mid-point of the foregoing
connecting rods 31 and also hingedly a drive rod 33, which is
linked hingedly to a cross-arm 34, rocking on the housing 1 at its
mid point 35 and extended in a short arm 36 by which both drive
rods 33 receive an opposing alternating movement from a drive wheel
37 provided with an eccentric pivot 38 for transmitting movement to
a short rod 39 linked to the arm 36. In this case the drive system
described supplies a rocking movement to the connecting rods 31,
equivalent to a longitudinal and horizontal movement of the support
surfaces 2, which is combined with a raising and lowering movement,
also generated by the actual rocking of the connecting rods 31.
[0043] In an embodiment version shown in FIGS. 7A and 7B, on the
motor-driven base 1, in respect of which the support surfaces 2
have to be mobile, a pair of vertical shafts 40-41 are established,
aligned longitudinally and centrally, on each of which an arm 42-43
is mounted, these arms 42-43 being parallel and identical and
joined hingedly at their free end 44 to respective pivots 45
integral with the under side of the support surfaces 2, forming
with the latter a deformable quadrilateral in which the rocking of
these arms 42-43 causes a longitudinal movement of the surfaces 2
in the same plane, as may be seen in any of the figures and in
accordance with the arrows represented in them.
[0044] This rocking movement of the arms 42-43 is carried out
specifically on the arm 42 to which a connecting rod 47, which
links the arm 42 to the drive wheel 49 eccentric 48, is attached
hingedly by way of a swivel pivot offset in relation to the shaft
40.
[0045] Moving on now to the practical embodiment of FIGS. 8A, 8B
and 8C, in it and on the motor-driven base there are established a
pair of supports 50 which, for instance with the aid of bearings,
form supports for a longitudinal shaft 51 with which a transverse
support 52 is integral, being integral in turn with the support
surfaces 2, so that an angular rocking movement of the shaft 51
causes a lateral rocking movement with parallel raising and
lowering of the support surfaces 2, which are shown by the two side
elevational views of the aforesaid FIGS. 8A, 8B and 8C. In order to
achieve this rocking, the shaft 51 is terminated at one of its ends
with a small radial extension 53 to which is attached hingedly the
arm 54 which connects the shaft 51 to the drive wheel 56 eccentric
55, so that the rotational movement of the wheel 56 becomes an
angular rocking movement of the shaft 51, which in turn is
converted into the aforesaid rocking movement for the support
surfaces 2.
[0046] Going on now to analyze the practical embodiment shown in
FIGS. 9A, 9B and 9C, relatively similar to that of the previous
figures, in it with the shaft 51 that receives the movement of the
drive wheel 56 there collaborates a second shaft 57, parallel and
below the shaft 51, mounted like the former on supports 50',
somewhat higher than those in the previous case, so that with these
shafts 51 and 57 there are associated respective transverse and
parallel arms 58 and 59, which are connected hingedly at their ends
69 to vertical arms integral with the under side of the support
surface 2, the arms 58, 59 and 61 forming a deformable
parallelogram which keeps the arms 61 vertical all the time,
permitting their vertical movement, as shown in the two side
elevational views in the above-mentioned FIGS. 9A, 9B and 9C, i.e.
a vertical alternating movement of the a support surfaces 2 is
achieved with the action of the drive wheel 56, in which these are
kept horizontal all the time.
[0047] In the embodiment in FIGS. 10A, 10B and 10C, a single
support surface 3 is established on the motor-driven base, although
obviously there could be two surfaces, specifically the surface
being provided with a transverse eccentric shaft 62, mounted on end
supports 63 , the shaft 62 with which there is integral a lower
radial arm 64, which is attached hingedly at its free end 65 to a
longitudinal connecting rod 66, which is attached hingedly at its
other end to the drive wheel 68 eccentric 67, so that in this case
the rotational movement of the drive wheel 68 is converted into a
rocking movement of the arn or extension 64 of the support surface
3 and consequently into a longitudinal rocking movement of the
former, between the limit situations shown in the two lateral views
of the afore-mentioned FIGS. 10A, 10B and 10C.
[0048] In FIGS. 11A and 11B it may be seen that on the motor-driven
base 1 in relation to which the support surfaces, composed in this
case of a transverse bar 89 and a tubular casing 90, which turns
freely in respect of the bar 89, have to be mobile, two supports 82
are established, arranged parallel to each other and adjacent to
the sides of the aforesaid base 1 and matching up with one of the
ends of same, between which supports 82 are mounted two arms 83,
one which is attached by way of one end 4 with a connecting rod 85,
which is hinged at the other end by means of an eccentric 86 on a
rotating wheel 87, as a driving element which is naturally operated
by a motor not shown. The arms 83 are mounted on a rotating shaft
88 established between the side supports 82, so that the bar 89
with its casing 90 is located between the opposite end of those
arms 83.
[0049] In this way, the rotational movement of the wheel 87
produces the rotational and sliding movement of the connecting rod
85, transmitting the movement to the arms 83 and thereby to the
shaft 88, causing the bar 89 mounted between the arms 83 to effect
and back and forth movement, as shown by the arrows represented in
the side elevational view in FIGS. 11A, 11B, 12A and 12B. This
continuous to and fro movement by the bar 89 and therefore by the
feet resting on it, will describe a small are, which will be formed
by the turning of the arms 83 on the shaft 88.
[0050] FIGS. 13A, 13B, 14A and 14B show an alternative embodiment
so that, instead of being longitudinal to and ho, the movement is
rocking up and down, so that in this case the components are the
same, with the only exception that the arms are determined by the
two sections 83' and 83'' in order to make the sections 83'' rock
up and down as shown in the side elevational views in FIGS. 13A,
13B, 14A and 14B.
[0051] Both the movements described and the means for obtaining
them are merely informative and any other kind of conventional
drive transmission means may be used without this affecting the
essence of the invention in any way at all.
[0052] The invention is primarily applicable in the sphere of
office jobs and the like, where an operator has to remain seated
during the larger part of the working day, although it may also be
used in rehabilitation tasks and in any other circumstances in
which similar performance is required, as is the case of collective
transport vehicles on long journeys during which passengers are
immobilized because of the shortage of space available.
[0053] Although other modifications and changes may be suggested by
those skilled in the art, it is the intention of the inventors to
embody within the patent warranted hereon all changes and
modifications as reasonably and properly come within the scope of
their contribution to the art.
* * * * *