U.S. patent number 3,757,788 [Application Number 05/229,775] was granted by the patent office on 1973-09-11 for prying and/or frictionless probing device.
Invention is credited to Hiram H. Renfroe.
United States Patent |
3,757,788 |
Renfroe |
September 11, 1973 |
PRYING AND/OR FRICTIONLESS PROBING DEVICE
Abstract
A device having an unlimited number of uses. Certain of these
uses depend upon the physical size of the device, etc. For example,
one such size enables the device to be used as a catheter for
unblocking clogged arteries of the human body, another size enables
the device to be used to insert exploratory sensing elements such
as a microminiaturized television camera into certain cavities or
ducts of the human body. Additionally, larger sizes might include a
plurality of such devices grouped into a battery arrangement to
lift and/or separate surfaces or objects having considerable
weight, such as lifting a non-ambulatory patient from his bed or
the like. Further, still larger sizes might be so arranged as to be
capable of lifting an airplane which may have landed wheels up or
for many other well known reasons conventional jacking apparatus
may be unfeasible. The principle of operation can easily be
understood by comparing it to inflating a long balloon which was
disposed inside out while in the deflated state, and the inflating
or elongation process thereof proceeeds along the length thereof
having the outside surface reversed gradually and only at the
extreme end thereof until the balloon is fully extended. The device
includes an elongated flexible tubular member which resembles a
balloon in that it is controllably inflated but which is not
resilient as is a balloon. The device optionally includes
telescoping rigid tubular sections which are pulled within the
flexible tubular member to aid in supporting the expanded flexible
tubular member. A second embodiment includes structure particularly
adapted for lifting a patient from his bed or the like. The concept
of this embodiment is to counteract the tendency of certain prior
devices to curl upwardly after having worked under one leg of the
patient, i. e., extend between his legs rather than beneath both
legs, as desired. A third embodiment includes ties for causing the
flexible tubular member to be elongated in cross section rather
than round when inflated.
Inventors: |
Renfroe; Hiram H. (West
Memphis, AR) |
Family
ID: |
22862619 |
Appl.
No.: |
05/229,775 |
Filed: |
February 28, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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94664 |
Dec 3, 1970 |
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Current U.S.
Class: |
604/271; 604/27;
606/106; 604/151 |
Current CPC
Class: |
A61G
7/1032 (20130101); A61B 17/22 (20130101); A61M
25/0119 (20130101); A61M 25/00 (20130101); A61G
7/103 (20130101); A61G 2200/32 (20130101) |
Current International
Class: |
A61B
17/22 (20060101); A61G 7/10 (20060101); A61M
25/00 (20060101); A61M 25/01 (20060101); A61m
025/00 () |
Field of
Search: |
;128/2R,2M,262,348,356
;156/286,287,294 ;5/81R,81A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Truluck; Dalton L.
Parent Case Text
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of my co-pending
application Ser. No. 94,664, filed Dec. 3, 1970, entitled "Prying
and/or Frictionless Probing Device, " now abandoned.
Claims
I claim:
1. A device for prying or probing comprising chamber means having
inlet and outlet openings, elongated flexible tubular means having
proximal and distal ends, said distal end of said flexible tubular
means including closure means for sealing the interior of said
tubular means from without, said proximal end of said flexible
tubular means being sealably attached to said chamber means
adjacent said outlet opening thereof, said flexible tubular means
being communicated with said inlet opening of said chamber means,
fluid pump means, means for selectively activating said pump means
to deliver fluid under pressure to said inlet opening of said
chamber means to selectively stiffen said flexible tubular means as
said fluid under pressure causes the flexible walls of said
flexible tubular means to expand outwardly, said flexible tubular
means having at least an outrolled position in which said flexible
tubular means is extended longitudinally protruding outwardly from
said outlet opening of said chamber means and an inrolled position
in which said flexible tubular means is foldably collapsed and is
withdrawn inwardly through said outlet opening of said chamber
means, rigid tubular means having at least a normal position in
which said rigid tubular means is enclosed within said chamber
means and an extended position in which said rigid tubular means
protrudes outwardly through said outlet opening of said chamber
means, means for inserting a portion of said rigid tubular means
within said flexible tubular means when said flexible tubular means
is in said outrolled position and said rigid tubular means is in
said extended position, lanyard means for inserting a portion of
said flexible tubular means within said rigid tubular means when
said flexible tubular means is in said inrolled position and said
rigid tubular means is in said normal position, roller means
disposed internally of said chamber means and rotatably attached to
said chamber means, a prime mover, means for selectively activating
said prime mover so as to selectively rotatably drive said roller
means, said lanyard means having one of the ends thereof fixedly
attached to said closure means of said flexible tubular means
internally thereof and the other end of said lanyard means being
fixedly attached to said roller means, deactivating said fluid
pressurizing means and sequentially activating said prime mover
being effective to cause said flexible tubular means to be
retreivably reeled from said outrolled position to said inrolled
position, said rigid tubular means including a plurality of
telescoping tubular members, and means for interlocking said
telescoping tubular members one with the other.
2. The device of claim 1 in which said interlocking means includes
ever decreasing cross section tapered walls for said plurality of
telescoping members.
3. The device of claim 1 in which said means for inserting said
rigid tubular means within said flexible tubular means includes
stopper means, said stopper means having passageways therein
positioned adjacent said closure means, and being fixedly attached
to said lanyard means for plug-like engaging a portion of said
rigid telescoping tubular means.
4. The device of claim 1 in which said rigid tubular means consist
of high density plastic.
5. A device for prying or probing comprising chamber means having
inlet and outlet openings, elongated flexible non-resilient tubular
means having proximal and distal ends, said distal end of said
flexible tubular means including closure means integral said
flexible tubular means for sealing the interior of said flexible
tubular means from without, said proximal end of said flexible
tubular means being sealably attached to said chamber means
adjacent said outlet opening thereof, said flexible tubular means
being communicated with said inlet opening of said chamber means
and having at least an outrolled position and an inrolled position
thereto, means for selectively delivering fluid under pressure to
said inlet opening of said chamber means to expand outwardly the
flexible walls of said flexible tubing means and to fully extend
said flexible tubular means longitudinally when said flexible
tubular means is in said outrolled position, roller means disposed
within said chamber means, a prime mover, means for selectively
activating said prime mover so as to selectively rotatably drive
said roller means, lanyard means having one of the ends thereof
fixedly attached to said flexible tubular means adjacent the lower
part of said closure means and internally thereof, the other end of
said lanyard means being fixedly attached to said roller means,
deactivating said fluid pressurizing means and sequentially
activating said prime mover being effective to cause said flexible
tubular means to invert itself along the length thereof while going
from said outrolled position to said inrolled position and to
simultaneously be retreivably reeled onto said roller means, and
tie means for holding certain opposite portions of the wall of said
flexible tubular means closer together than are certain other
opposite portions thereof, said tie means being arranged in two
rows extending along the length of said flexible tubular means
establishing an inner channel and a pair of outer channels, moving
said flexible tubular means from said inrolled position towards
said outrolled position being effective to pass said lanyard
through said inner channel, and returning said flexible tubular
means to said inrolled position being effective to cause, said
lanyard to pull the portions of said flexible tubular means
defining in part said outer channels into said inner channel.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to prying, separating and/or probing
devices.
2. Description of the Prior Art
Numerous prying devices are well known and range from the simple
bar-like lever and fulcrum to some of the more elaborate devices,
e. g., hydraulic and/or pneumatic jacks. One particular method and
apparatus for moving objects is disclosed in the Koll et al. U.S.
Pat. No. 3,493,979.
Other devices known by the applicant include the Sjodin U.S. Pat.
No. 2,513,527; the Harper et al. U.S. Pat. No. 2,794,758; the
Silverman U.S. Pat. No. 3,168,092; the Stibitz U.S. Pat. No.
3,178,732; and the Zeimer U.S. Pat. No. 3,525,329. Certain of the
above references incorporate a retracting cord or lanyard, e. g.,
the '732 patent wherein the retracting cord 7 is attached centrally
of the end or closure of the flexible sleeve or tubular member 1.
The remaining ones of the above references are void of a retracting
cord or lanyard. A particular problem prevails when attempting to
direct a probe, i. e., after having worked its way under one of the
patient's legs the weight of this leg causes the protruding end of
the device to curl upwardly resulting in the device extending
between the legs of the patient rather than beneath both legs, as
desired.
SUMMARY OF THE INVENTION
The concept of the present invention is to provide a prying,
separating and/or frictionless probing device for unlimited uses.
Certain of these uses are definitely related to a particular
physical size, etc. For example, one such size enables the device
to be used as a catheter in unblocking clogged arteries of the
human body, another size enables the device to be used to insert
exploratory sensing elements, i. e., a microminiaturized television
camera, a fiber optic system, or a sigmoidoscope, into certain
cavities or ducts of the human body. Additionally, larger sized
devices might include a plurality of such devices grouped into a
battery arrangement to lift and/or separate surfaces or objects
having considerable weight, i. e., lifting a non-ambulatory patient
from his bed or the like. Further, still larger sized devices might
be so arranged as to be capable of lifting an airplane which may
have landed wheels up or for many other well known reasons
conventional jacking apparatus may be unfeasible.
An important feature of the present invention is the unique manner
in which it crawls between surfaces substantially without
generating friction, i. e., lubricant is not required when using
the device as a catheter. Likewise, when used to lift a patient
from his bed, the bed linen and/or the clothing of the patient are
scarcely disturbed and the patient is not pinched, rubbed or
annoyed in the slightest by the lifting process.
The device includes a chamber leading into an elongated flexible
non-resilient tubular member which is closed at the outer end
thereof, a fluid pump for selectively delivering fluid under
pressure to the chamber to expand outwardly the flexible walls of
the tubular member and to fully extend it longitudinally as the
pressure within the chamber increases.
The device also includes a motor-driven roller disposed within the
chamber and a lanyard which is attached at the one end thereof to
the outermost end of the tubular member and at the other end
thereof to the roller so that rotatably driving the roller causes
the tubular member to be reversibly pulled or rolled inwardly
within itself into the chamber, i. e., pressure on the fluid is
reduced to nil, and the roller convolutely winds the lanyard so as
to pull the outermost end of the flexible tubular member from
within. This displaces the fluid and causes the flexible tubular
member to be reversed or have its outside surface pulled within
itself until it is completely within the chamber.
Extending or outrolling the flexible tubular member is accomplished
by allowing the fluid under pressure to be admitted to the chamber
and allowing the lanyard to be unwound from the roller, i. e., this
initially causes a blossoming action of the flexible tubular
member. In other words, the positive pressure within the chamber
blossoms or unfoldingly initiates a protruding portion of the
tubular member adjacent and outwardly from the chamber and as the
pressure builds up, an elongation process proceeds in a growth-like
manner longitudinally of the end thereof until the flexible tubular
member is fully extended to an outrolled position.
Another important feature of the device of the present invention is
that the elongation process substantially proceeds along a path of
least resistance, i. e., the growing end of the flexible tubular
member crawls along ever probing so as to bend itself up, down,
left or right, to the shape of the canal or duct in which it might
have been placed. Equally important is the fact that this
growth-like process can be reversed for frictionless
withdrawal.
An alternate embodiment of the device is particularly directed
towards overcoming the above-mentioned problem that prevails when
attempting to direct the probing device beneath a patient. The
tendency for the protruding end of the device to curl upwardly
between the legs of the patient is obviated by attaching the
lanyard to the flexible tubing adjacent the lower part thereof
rather than to the closure thereof or centrally as taught by the
'732 patent, i. e., the lanyard of the present invention is
attached to the flexible tubing a spaced distance inwardly from the
closure thereof and adjacent the downwardly directed portion of the
continuous wall of tubing. In this manner, the device has a
tendency to dip downwardly at the transient end thereof and to
maintain a positive engagement with the surface supporting the
patient. In other words, this downward dipping tendency prevails
regardless of the extent to which the probe may be extended, e. g.,
halfway paid out or totally paid out, etc., thus counteracting the
tendency of the weight of the patient's leg to cause the end of the
probe to curl upwardly.
The device optionally includes telescoping rigid tubular sections
which are pulled within the flexible tubular member to aid in
supporting the expanded flexible tubular member. Obviously, the
rigid telescopic tubular members would not be recommended when the
device is used as a catheter. However, a typical environment in
which the rigid telescopic tubular members might be beneficial
would be when a plurality of such devices are grouped into a
battery arrangement to lift and/or separate surfaces or objects
having considerable weight, e. g., lifting a non-ambulatory patient
from his bed or the like.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the device showing the flexible
tubular member in an expanded outstretched or outrolled
position.
FIG. 2 is a sectional view taken as on the line II--II of FIG.
1.
FIG. 3 is a sectional view taken as on the line III--III of FIG. 2,
showing a lanyard attached centrally of the closure means of the
flexible tubular member.
FIG. 4 is a sectional view taken as on the line IV--IV of FIG. 1,
schematically showing a means of energizing the fluid pump and the
roller motor.
FIG. 5 is a sectional view taken as on the line V--V of FIG. 4,
showing the same schematic as described for FIG. 4.
FIG. 6 is a view substantially identical to FIG. 5 except the
flexible tubular member is foldably collapsed and is withdrawn
inwardly to an inrolled position, the rigid tubular members are
also shown withdrawn and enclosed within the chamber.
FIG. 7 is a sectional view similar to FIG. 3 but showing a second
embodiment wherein the lanyard is attached to the continuous wall
of the flexible tubular member a spaced distance from the closure
means.
FIG. 8 is a sectional view similar to FIG. 2 but taken on the line
VIII--VIII of FIG. 7.
FIG. 9 is a sectional view similar to FIG. 7 but showing a third
embodiment wherein certain opposite portions of the continuous wall
of the flexible tubular member are tied together to hold them
closer together than are certain other opposite portions to
maintain the inflated flexible tubular member in an oval cross
section.
FIG. 10 is a top view showing the outer portion of the third
embodiment of the probing device of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The prying, separating and/or frictionless probing device of the
present invention is herein character-referenced by the numeral 11
and it is anticipated that the device 11 will have infinite uses.
Accordingly, a random sampling of the broad span of intended uses
for the device 11 will herein be referenced, as examples in
passing, in order to more clearly disclose the significance of the
device 11. In other words, these anticipated uses are given by way
of illustration and not limitation. The device 11 generally
comprises a sealably enclosed chamber 13, an elongated flexible
tubular member 15, and a mechanically driven fluid pump 17.
The chamber 13 is shown in the drawings to be formed by a box-like
structure 14. However, the shape of the structure 14 and/or the
chamber 13 is irrelevant, and it is anticipated that in actual
practice the structure 14 and/or the chamber 13 would have a
variety of shapes, depending upon the particular ultimate intended
use. Regardless of the ultimate intended use, the chamber 13 will
be provided with inlet and outlet openings 19, 21. The distal end
of the tubular member 15 includes a closure portion 23. The tubular
member 15 preferably is formed from conductive neoprene when the
device 11 is intended for medical uses. However, the tubular member
15 may be formed from any of the well known filament reinforced
sheet rubber materials, e. g., rubber coated nylon, when used to
lift and/or separate surfaces or objects having considerable
weight, e. g., lifting a non-ambulatory patient from his bed or the
like. In either event, the closure portion 23 preferably is
integrally formed with the tubular member 15 so that the tubular
member 15 and the closure portion 23 thereof are impervious to the
fluid emitted from the pump 17, i. e., the fluid may be air or a
substance having more density thereto such as water or the
like.
The proximal end of the tubular member 15 is sealably secured to
the structure 14 in any well known manner, e. g., a fluid
impervious bonding agent or the like. FIG. 6 of the drawings best
illustrates the preferred manner in which the tubular member 15 is
secured to the structure 14, i. e., the proximal end of the member
15 is provided with a flange portion 25. The flange 25 has an outer
perimeter slightly greater than the dimensions of the outlet 21 so
that the flange 25 may be fixedly attached to the structure 14 or
the interior surface of the chamber 13 circumjacent the outlet 21.
In other words, the chamber 13 is sealed from without, thus
communicating the interior of the tubular member 15 with the inlet
opening 19 of the chamber 13, as best viewed in FIGS. 4 and 5 of
the drawings.
The tubular member 15 has an outrolled position, as best
illustrated in FIG. 5; an inrolled position, as best illustrated in
FIG. 6; and infinite positions thereof between the outrolled and
inrolled positions. When the tubular member 15 is in the outrolled
position (FIG. 5), a surface 27 thereof contiguously engages the
surface or surfaces of the substance being worked upon, e. g., when
the device 11 is being used as a catheter, the surface 27
contiguously engages the interior walls of the vein and/or arteries
of the human body, or when used to cushion or separate freight or
the like, the lower portion of the surface 27 would engage the
surface upon which the freight is resting, and the upper portion of
the surface 27 would engage the bottom of the freight or the like.
Additionally, the fluid contiguously engages an inner surface 29,
i. e., the tubular member 15 being impervious to the fluid.
However, when the tubular member 15 is in the inrolled position
(FIG. 6), the outer surface 27 is reversed as the tubular member 15
is withdrawn into the chamber 13, i. e., the inner surface 29 is
still in contact with the fluid but the pressure on the fluid has
diminished substantially to zero lbs. per square inch. Movement of
the member 15 from the outrolled position to the inrolled position
includes structure yet to be disclosed.
FIGS. 1 and 2 of the drawings depict the cross section shape of the
member 15 as having a major and a minor axis. In actual practice,
it is anticipated that some intended uses of the device 11 would be
better served when the tubular member 15 has a circular cross
section, e. g., when the device 11 is used as a catheter or the
like.
The device 11 also includes a switch 31 which may be selectively
activated so as to deliver fluid under pressure to the inlet
opening 19 of the chamber 13 to expand outwardly the flexible walls
of the member 15 and to fully extend the member 15 longitudinally
as it ultimately reaches the outrolled position. In other words,
the pump 17, being mechanically driven by an electric motor 33 or
the like, has a typical power cord 35 having the one end thereof
attached to the motor 33 and the other end thereof terminating with
a plug 37 for insertion into a conventional electrical outlet. One
of the conductors of the power cord 35 is interposed by the switch
35 in a manner well known to those skilled in the art.
Certain environments may be such that the device 11 may preferably
be limited to the structure just disclosed, e. g., in lifting heavy
objects the collapsed tubular member 15 may manually be placed
between the surfaces to be separated. In this instance, activating
the pump 17 pressurizes the chamber 13 and causes the flexible
walls of the member 15 to expand outwardly, thus prying,
separating, and/or lifting such an object. Obviously, certain
remote or isolated locations might dictate that the pump 17 be
mechanically driven by an internal combustion engine or the like, a
feature which is anticipated to be within the scope of the present
invention.
However, the device 11 preferably includes a roller assembly 39
disposed within the chamber 13, as best viewed in FIGS. 4, 5 and 6.
The roller assembly 39 is journaled to the box-like structure 14 of
the chamber 13. One end of the roller 39 protrudes outwardly from
the chamber 13 (FIG. 4). The roller assembly 39 preferably is
sealed to the box-like structure of the chamber 13 adjacent the
protruding end thereof in order to prevent fluid from escaping
outwardly from the chamber 13, a well known procedure obvious to
those skilled in the art.
Additionally, the device 11 preferably includes a prime mover, e.
g., an electric motor 41 for rotatably driving the roller assembly
39. An endless belt 43 frictionally engages a pulley 45 and the
roller assembly 39 in a manner obvious to those skilled in the art.
Further, the motor 41 is provided with a switch 47 for selectively
activating the motor 41 so that the roller assembly 39 may be
selectively rotatably driven, i. e., a power cord 49 has the one
end thereof attached to the motor 41 and the other end terminating
at a plug 51. The plug 51 is intended to be inserted into any
convenient electrical outlet. One of the two conductors making up
the power cord 49 is interposed by the switch 47 in a well known
manner obvious to those skilled in the art. It should be understood
that the single pole single throw switches 31, 47 as shown in the
drawing may conveniently be grouped into one single pole double
throw switch having an intermediate or off position. In which
instance, one of the plugs 37, 51 is superfluous, a well known
procedure for those skilled in the art.
Attached to the roller assembly 39 is the one end of a lanyard 53,
the other end of the lanyard 53 being fixedly attached to the
closure portion 23 of the member 15 in any well known manner, e.
g., an eyelet 55, preferably being formed integrally with the
closure portion 23, receives the lanyard 53. The lanyard 53 has a
knot or the like (not shown) adjacent the end thereof which
precludes the lanyard 53 from slipping out of the eyelet 55. It
should be understood that the roller assembly 39 preferably
includes a clamp 57 for bindingly attaching the one end of the
lanyard 53 to the roller 39, a well known procedure obvious to
those skilled in the art. Additionally, a valve 59 is included and
is positioned between the chamber 13 and the pump 17 for reasons
yet to be disclosed.
From the above disclosure, it should be obvious that we now have
unique structure for retrievably reeling the tubular member 15 from
the outrolled position to the inrolled position. Assuming the
device 11 to be in the outrolled position as previously described
and best illustrated in FIG. 5, accordingly, the object is to
withdraw the flexible member 15 from other structure, e. g., from
an artery or the like.
This is accomplished by moving the switch 31 to the off position,
thus stopping the pump 17 while the valve 59 preferably is fully
opened. The switch 47 is sequentially moved to the closed position,
which activates the motor 41, causing the roller assembly 39 to be
rotatably driven in a clockwise direction, as when viewed in FIGS.
5 and 6, thus causing the lanyard 53 to be convolutely wound about
the roller 39.
The closure portion 23 of the tubular member 15, having the lanyard
53 attached thereto, is pulled inwardly, collapsing the flexible
walls circumjacent the closure portion 23 so that the outer surface
27 is reversibly rolled inwardly and the fluid is displaced
outwardly from the chamber 13 through the valve 59. This inrolling
or longitudinally shortening process of the flexible member 15 will
continue until the member 15 reaches the inrolled position or the
switch 47 is opened. In other words, the flexible member 15 may be
maintained in a static condition at any one of infinite positions
between the inrolled and outrolled positions by placing both
switches 31, 47 in the off position and closing the valve 59.
It is anticipated that some intended uses of the device 11 may be
such that the physical length of the box-like structure 14 for the
chamber 13 is substantially equal to the length of the tubular
member 15. In this instance, the flexible member 15 is inrolled or
turned within itself so that the outer surface 27 thereof is
directed inwardly and the tubular member 15 is reversed and
completely housed within the chamber 13.
However, the preferred length of the member 15 exceeds the physical
length of the box-like structure 14 for the chamber 13. In this
regard, the tubular member 15 is withdrawn in like manner as
previously described and a portion thereof is convolutely wound
about the roller 39 as best viewed in FIG. 6 of the drawings.
It should be understood that conventional structure normally
associated with the field of hydraulics would preferably be
included with the pump 17 when warranted by the density of the
fluid substance, e. g., in the event hydraulic fluid or sterilized
distilled water were to be the fluid, a reservoir (not shown) and
other associated plumbing, i. e., bypass lines, etc., well known to
those skilled in the art preferably would be incorporated. Further,
the outer or inner surface of the closure portion 23 may be
provided with suitable structure or device for attaching various
devices or exploratory sensing elements thereto, e g., a
microminiaturized television camera, a fiber optic system, or the
like, not shown. In the case of the structure on the outer surface,
the electrical circuit required to operate any such device would be
sealably passed through the structure of the closing portion 23 and
carried internally of the tubular member 15, conceivably taking the
place of the lanyard 53.
An important feature of the present invention is the unique manner
in which it crawls between surfaces substantially without a sliding
motion so that no friction is generated. In fact, lubricant is not
required nor is it recommended when using the device 11 as a
catheter. Also, it will be understood that there is no transfer of
germs, e. g., from the opening of the urethra at the genitalia to
the bladder, with the use of the present invention. In other words,
assuming the device 11 to be in the inrolled position as best
viewed in FIG. 6 and the device 11 is miniaturized so that the
dimensions of the tubular member 15 are compatible with the duct or
canal in which the catheter is intended to be inserted, it is
anticipated that the device 11 could possibly go into the ureter to
remove kidney stones, i. e., the tubular member 15 following the
urethra and ureter passing through the bladder and being
controllably stopped when the tubular member 15 engages the kidney
stone. At this point, the tubular member 15 preferably would be
withdrawn, and the inrolling action of the outer surface 27 thereof
would retrieve the kidney stone, and it would be inrolled and
suspended between adjacent portions of the outer surface 27 and
carried outwardly from the ureter, the bladder, and the urethra. A
substantially equally important feature of the device 11 is that
the above operation can be carried out with greatly reduced pain to
the patient, as compared with previous catheters, a particularly
significant feature for a male patient.
Continuing now with disclosing the outrolling operation of the
device 11, the outlet 21 of the box-like structure 14 forming the
cavity 13 is brought into proximity with the particular duct, e.
g., the urethra, the switch 37 is moved to the closed position, and
the switch 47 and valve 59 are in the open position. The pump 17
delivers fluid under pressure to the inlet 19 which creates a
positive pressure within the chamber 13. It should be understood
that this action has the same effect as placing a suction source
adjacent the outlet opening 21, since the ambient pressure on the
outer surface 27 of the member 15 is lower than the pressure on the
inner surface 29 of the member 15. Accordingly, the portion of the
tubular member 15 circumjacent the flange portion 25 thereof is
forced out through the outlet opening 21.
In other words, the tubular member 15 commences to blossom, i. e.,
initiating a protruding portion circumjacent the flange portion 25
thereof, outwardly from the chamber 13. An elongation process of
the member 15 proceeds in a growth-like manner longitudinally
adjacent the end thereof, until the flexible member 15 is fully
extended to the outrolled position shown in FIG. 5, i. e., until
either the valve 59 is closed or the switch 31 is opened. It should
be understood that at this same time the roller assembly 39
yieldably pays out the tubular member 15 and/or the lanyard 53 as
the pressure within the chamber 13 is maintained or increased by
the pump 17, i. e., the inertia of the armature for the motor 41
keeps tension on the lanyard 53. Quite significantly, the
elongation process proceeds along a path of least resistance, i.
e., the flexible member 15 crawls along ever probing so as to bend
itself up, down, left or right, to the shape of the canal or duct
in which it might have been placed. Equally significant is that
this elongation process can be reversed when desired, the details
of which were previously disclosed.
It may be preferable in certain environments of the device 11 to
include an optional rigid tubular assembly 61, e. g., when larger
sized device 11 are grouped into a battery arrangement to lift
and/or separate surfaces or objects having considerable weight. One
such object might be a non-ambulatory patient which may easily be
lifted from his bed by simply operating the controls of the device
11. The function of the rigid tubular assembly 61 is that it aids
in supporting the expanded flexible tubular member 15. It is
anticipated that certain environments may be such that the physical
length of the box-like structure 14 forming the chamber 13 is
substantially equal to the length of the flexible member 15. In
this event, the rigid tubular assembly 61 preferably would be a
single section. However, more than likely, the physical length of
the device 11 will be relatively short. Accordingly, the rigid
tubular assembly 61 would be formed from a plurality of telescoping
tubular members 63, 65, 69 as best viewed in FIGS. 5 and 6.
Any well known method for interlocking the members 63, 65, 69 one
to the other is acceptable for the purpose herein disclosed. I
prefer to incorporate an interlocking feature which includes
ever-decreasing cross section tapered walls for the plurality of
telescoping members 63, 65, 69. It should be understood that the
taper as depicted for the members 63, 65, 69 in FIGS. 5 and 6 is
exaggerated in order to more clearly illustrate the structural
feature. The tubular members 63, 65, 69 may be formed from any well
known rigid substance, e. g., metal or a high density plastic or
the like, and have a cross sectional shape substantially identical
to that selected for the flexible member 15.
The rigid tubular assembly 61 has a normal position as best viewed
in FIG. 6 of the drawings in which the tubular assembly 61 is
enclosed within the chamber 13 and an extended position as best
viewed in FIG. 5 of the drawings in which the assembly 61 protrudes
outwardly through the outlet opening 21 of the chamber 13. It can
readily be seen from FIG. 5 of the drawings that the tubular
assembly 61 is received within the flexible member 15 when the
flexible member 15 is in the previously described outrolled
position, i. e., the tubular assembly 61 being in the
just-described extended position.
Further, it can be seen from FIG. 6 of the drawings that the
flexible member 15 is received within the tubular assembly 61 when
the flexible member 15 is in the previously described inrolled
position, i. e., the tubular assembly 61 being in the
just-described normal position.
The member 69 of the tubular assembly 61 preferably terminates at
the proximal end thereof with an outwardly directed flange portion
71, as best viewed in FIGS. 5 and 6 of the drawings. The flange
portion 71 contiguously engages the flange portion 25 when the
tubular assembly 61 is in the just-described extended position, the
flange 71 serving as a mechanical stop for limiting the outward
movement thereof. In addition, an inwardly extending flange 72 is
provided on member 69 with flange 72 serving as a mechanical stop
for limiting inward movement of members 63, 65 relative to member
69.
The device 11 also includes a stopper assembly 73 as best viewed in
FIGS. 2, 3, 5 and 6. The stopper assembly 73, formed from high
density plastic or the like, has an exterior shape substantially
complementary and conforming to the interior wall of the tubular
member 63 adjacent the distal end thereof. The assembly 73 is
positioned adjacent the closure portion 23 of the tubular member 15
and is fixedly attached to the lanyard 53. From FIG. 3 of the
drawings, it may be seen that a pair of clamps 75 bindingly engage
the lanyard 53 on either side of inwardly directed support
structure for the stopper assembly 73.
From FIG. 2 of the drawings, it may be seen that the stopper
assembly 73 includes a plurality of radial ribs 77 defining
passageways 79, thus providing said inwardly directed support
structure for the stopper assembly 73. The clamps 75 bindingly
engage the lanyard 53, i. e., one clamp 75 being positioned
outwardly from the ribs 77 and the other clamp 77 being positioned
inwardly of the ribs 77, as best viewed in FIG. 3. The stopper
assembly 73 maintains a fixed position with respect to the closure
portion 23 regardless of the position of the tubular member 15 or
the rigid tubular assembly 61.
In other words, the stopper assembly 73 will contiguously or
plug-like engage the tubular member 63 when substantially 50
percent of the length of the tubular member 15 protrudes from the
outlet 21. Further displacement of the tubular member 15 towards
the outrolled position thereof causes the stopped assembly 73 to
start extending the tubular assembly 61, i. e., the member 63 is
carried outwardly through the outlet 21 and the succeeding tubular
members 65, 69 are carried outwardly from the chamber 13 through
the outlet 21 as the tubular member 15 approaches the previously
described outrolled position (FIG. 5).
It should be understood that since the tubular member 69
contiguously engages the inner surface 29 of the tubular member 15,
the fluid contained in the tubular member 15 adjacent the distal
end thereof would be trapped and present withdrawal or collapsing
inrolling difficulties if it were not for the passageways 79
provided in the stopper assembly 73, as previously described.
Accordingly, when the tubular member 15 is in the outrolled
position (FIG. 5) and it is desired that it be placed in the
inrolled position (FIG. 6) as previously disclosed, the fluid
adjacent the distal end of the tubular member 15 between the inner
surface 29 and the outer walls of the tubular members 63, 65 is
directed through the passageways 79 of the stopper assembly 73.
This fluid is then carried within the tubular assembly 61 to the
valve 59 in a manner like that previously described. Additionally,
the closure portion 23 collapses inwardly and the wall of the
member 15 circumjacent thereto initiates the inrolling movement
toward the previously disclosed inrolled position.
In other words, the rigid tubular assembly 61 does not interfere
with the movement of the tubular member 15 in any way. The tubular
member 15 urges the outermost member 63 toward the outlet 21 as the
tubular member 15 is traveling toward the previously disclosed
inrolled position. Further, the inrolling action of the tubular
member 15 moves the succeeding tubular members 65, 69 toward and
subsequently through the outlet 21 as the tubular member travels
toward the inrolled position.
A second embodiment of the tubular member for the device is herein
disclosed and is character referenced by the numeral 215 as
depicted in FIGS. 7 and 8 of the drawings. The tubular member 215
includes a closure portion 223 for sealing the tubular member 215
from without. When the tubular member 215 is in the outrolled
position, the outer surface 227 thereof contiguously engages the
surface or surfaces being worked upon, e. g., an upper portion 227'
thereof engaging the patient to be lifted and a lower portion 227"
engaging the bed or the like supporting a patient. Additionally,
the fluid under pressure engages the inner surface 229. In other
words, the surface 227 constitutes the exterior, and the surface
229 constitutes the interior when the tubular member 215 is in an
outrolled position as previously described for the principal
embodiment thereof. It should be understood that the tubular member
215 as depicted in FIG. 7 of the drawings is in the aforementioned
outrolled position.
The second embodiment also includes a lanyard 253 substantially
identical to the lanyard 53 for the principal embodiment. An eyelet
255 is included and is attached to the interior surface 229 of the
tubular member 215 rather than to the closure portion. More
specifically, the eyelet 255 is attached to the inner surface 229
adjacent the lower portion 227" and a spaced distance from the
distal end or closure portion 223 adjacent the lower part thereof.
Locating the eyelet thusly will counteract the tendency of the
weight of the patient's leg to cause the transient end of certain
probes to curl upwardly, i. e., the probe of prior devices as well
as the tubular member 15 of the instant invention.
It should be understood that the end of the tubular member 215 is
not always the closure portion 223. For example, when the tubular
member 215 is almost fully inflated or paid out to the outrolled
position, a reference point 215' might constitute the end thereof.
On the other hand, when the tubular member 215 is inflated or paid
out to a lesser degree, i. e., closer to the inrolled position, a
reference point 215" would constitute the end thereof, etc.
However, regardless of the degree of inflation of the tubular
member 215, i. e., whether it is halfway paid out or totally paid
out, etc., the transient end of the tubular member 215 will have a
tendency to dip downwardly toward the lower portion 227".
Therefore, when a weight, e. g., one leg of a patient, is placed on
the upper portion 227', the lower portion 227" will not lift up
from the bed or the like. In other words, the aforementioned
problem of the probe working between the legs of the patient is
obviated by the tubular member 215.
From FIGS. 7 and 8 of the drawings, it may be seen that the second
embodiment may include the optional rigid tubular assembly 261
which is similar to the assembly 61 previously disclosed for the
principal embodiment. Therefore, only the member 263 corresponding
to the member 63 is depicted in the drawings. It should be pointed
out that the distal end of the tubular member 263 preferably is
sloped as shown in FIG. 7 as opposed to being straight like the
member 63 previously described. In other words, the tubular member
263 has an upper portion 263' and a lower portion 263" with the
upper portion 263' extending beyond the lower portion 263" as
clearly shown in FIG. 7 of the drawings.
The second embodiment also includes a stopper assembly 273 which is
substantially identical to the stopper assembly 73 previously
described for the principal embodiment. Therefore, a description of
the stopper assembly 273 would be redundant.
A third embodiment of the tubular member is herein disclosed and is
character referenced in FIGS. 9 and 10 of the drawings by the
numeral 315. The tubular member 315 has a closure portion 323
corresponding to the previously disclosed closure portions 23, 223,
an outer surface 327 corresponding to the previously described
outer surfaces 27, 227, i. e., having an upper portion 327' and a
lower portion 327", an inner surface 329 corresponding to the
previously described inner surfaces 29, 229, and other
corresponding structure, e. g., lanyard 353, eyelet 355, rigid
tubular assembly 361, and stopper assembly 373. A detailed
disclosure of the above-mentioned corresponding structure would
also be redundant. The main feature of the tubular member 315 is
that tie means 381 are included for holding the upper portion 227'
in a relationship close to the lower portion 227", thus causing the
tubular member 315 to be elongated in cross section rather than
round when inflated or when in the outrolled position. From FIG. 10
of the drawings, it may be seen that the ties 381 are arranged in
two rows, i. e., one row being the ties 381' and the other row
being ties 381". The rows 381', 381" extend along the length of the
flexible tubular member 315 establishing an inner channel 383 and a
pair of outer channels 385, 387.
It should be pointed out that when the tubular member 315 is moved
from the inrolled position towards the outrolled position, i.e., in
the same manner as previously described for the tubular member 15,
the lanyard 353, substantially identical to lanyard 253 passes
through the inner channel 383 as shown in FIG. 9 of the drawings.
Conversely, returning the tubular member 315 to the inrolled
position is effective to cause the lanyard 353 to pull the outer
portion of the tubular member 315 defining in part the outer
channels 385, 387 into the inner channel 383, i. e., in the
direction of the respective arrows 389, 391. In other words, when
the tubular member 115 is in the inrolled position, the inner
surface 329 and the ties 381 would be on the exterior thereof, and
the surface 227 would be on the interior thereof, i. e., like that
shown in FIG. 6 of the drawings for the principal embodiment. Also,
it should be pointed out that channels 383, 385 and 387 may be
formed otherwise than by individual ties 381, as for example, by
making ties 381' and 381" respectively into continuous strips,
without departing from the spirit and scope of the present
invention.
Although the invention has been described and illustrated with
respect to preferred embodiments thereof, it is to be understood
that it is not to be so limited since changes and modifications may
be made therein which are within the full intended scope of the
invention.
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