U.S. patent number 3,807,048 [Application Number 05/214,602] was granted by the patent office on 1974-04-30 for combined irrigator, injector and evacuator.
Invention is credited to Oscar Malmin.
United States Patent |
3,807,048 |
Malmin |
April 30, 1974 |
COMBINED IRRIGATOR, INJECTOR AND EVACUATOR
Abstract
A dental irrigator and injector for utilization in root canal
therapy designed to be operated by one hand and which has a
plurality of uses, both dental and medical. The instrument includes
a handgrip portion, a body which is capable of receiving a
disposable syringe or carpule, and means for actuating the syringe
or carpule to force fluids contained therein into a bore passing
through the body. The opposed end of the body contains a barrel,
with or without an extension, and a needle, all of which have
coaxial communicating through bores so that the irrigating or
injecting material may be forced out of the medicator dental
ampule, commonly called a "carpule," or syringe through the bores,
and out through the needle. The handgrip portion also contains a
through bore, valving means and means for attachment to a vacuum
source so that by moving of the valving means, either the bore
communicating with the syringe or carpule is opened and the bore
leading to the vacuum source is closed or vice-versa depending upon
the particular operation desired.
Inventors: |
Malmin; Oscar (Akron, OH) |
Family
ID: |
22799724 |
Appl.
No.: |
05/214,602 |
Filed: |
January 3, 1972 |
Current U.S.
Class: |
433/81; 433/80;
433/91 |
Current CPC
Class: |
A61C
17/0208 (20130101) |
Current International
Class: |
A61C
17/00 (20060101); A61C 17/02 (20060101); A61c
003/00 () |
Field of
Search: |
;32/4R,60,22,57 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Peshock; Robert
Claims
What is claimed is:
1. A dental injection and evacuation instrument for use endontics
with a vacuum source and a fluid-containing ampule having a
self-contained plunger, comprising:
A. an elongate body having
1. an ampule-receiving bore in one end of said body and
2. a through central bore interconnecting said ampule-receiving
bore and the opposed end of said body;
B. a handgrip
1. secured to said body
2. and having a through bore therein that interconnects with said
through central bore of said body between said opposed end of said
body and said ampule-receiving bore
3. and adapted to be connected to said vacuum source;
C. valve means carried by said body and said handgrip and including
an elongated body received in said handgrip and a valve resealably
received on the inboard end of body and projecting into the point
of interconnection of said central bore of said body and said bore
of said handgrip for selectively closing off said bore in said
handgrip and opening said bore in said body; and
D. depressor means telescopically carried by one end of said body
for forcing fluid from said ampule into said through central bore
in said body and having contact means adapted to contact the
plunger of said ampule.
2. The instrument of claim 1 wherein
A. said sleeve has
1. an open end and
2. a substantially closed end; and
B. said contact means include
1. an axially inwardly extending projection adjacent said closed
end.
3. The instrument of claim 1 further characterized by the presence
of a needle releasably carried by said opposed end of said body and
having a through central bore in coaxial alignment with said
through central bore of said body.
4. The instrument of claim 1 further characterized by the presence
of a barrel having one end releasably attached to said opposed end
of said body and having a through bore in coaxial alignment with
said through central bore of said body.
5. The instrument of claim 4 further characterized by the presence
of a needle releasably attached to the opposed end of said barrel
and having a through bore in coaxial alignment with said through
central bore of said body.
6. The instrument of claim 4 further characterized by the presence
of an extension barrel having one end releasably attached to the
opposed end of said barrel and having a through bore in coaxial
alignment with said central bore of said barrel.
7. The instrument of claim 6 further characterized by the presence
of a needle releasably attached to the opposed end of said
extension barrel and having a through bore in coaxial alignment
with said through bore of said extension barrel.
8. A Dental injection and evacuation instrument for use with a
vacuum source and a fluid-containing ampule, comprising;
A. an elongate body having
1. an ampule-receiving bore in one end of said body and
2. a through central bore interconnecting said ampule-receiving
bore and the opposed end of said body;
B. a handgrip
1. secured to said body
2. and having a through bore therein that interconnects with said
through central bore of said body between said opposed end of said
body and said ampule-receiving bore
3. and adapted to be connected to said vacuum source;
C. valve means carried by said body and said handgrip and
projecting into the point of interconnection of said central bore
of said body and said bore of said handgrip for selectively closing
off said bore in said handgrip and opening said bore in said body;
and
D. depressor means telescopically carried by one end of said body
for forcing fluid from said ampule into said through central bore
in said body.
9. The instrument of claim 8 further characterized by;
A. said body of said valve means being rotatably received in said
handgrip;
B. an operating handle carried on the opposed projecting end of
said body.
10. The instrument of claim 9 wherein said depressor means
include
A. a hollow sleeve having
1. an open end
2. a substantially closed end with a through bore therein and
3. a plunger having
a. a cap releasably secured to said substantially closed end of
said sleeve and
b. a plunger rod projecting from said cap through said through bore
of said closed end and adapted to contact one end of said
ampule.
11. The instrument of claim 10 further characterized by the
presence of means disposed in said central bore of said body and
adapted to puncture the opposed end of said ampule.
12. The instrument of claim 10 further characterized by the
presence of locking means carried by said cap of said plunger and
said sleeve for releasably interconnecting said plunger and said
sleeve.
13. The instrument of claim 9 further characterized by the presence
of a needle releasably carried by said opposed end of said body and
having a through central bore in coaxial alignment with said
through central bore of said body.
14. The instrument of claim 9 further characterized by the presence
of a barrel having one end releasably attached to said opposed end
of said body and having a through bore in coaxial alignment with
said through central bore of said body.
15. The instrument of claim 14 further characterized by the
presence of a needle releasably attached to the opposed end of said
barrel and having a through bore in coaxial alignment with said
through central bore of said body.
16. The instrument of claim 14 further characterized by the
presence of an extension barrel having one end releasably attached
to the opposed end of said barrel and having a through bore in
coaxial alignment with said central bore of said barrel.
17. The instrument of claim 16 further characterized by the
presence of a needle releasably attached to the opposed end of said
extension barrel and having a through bore in coaxial alignment
with said through bore of said extension barrel.
18. The instrument of claim 1 further characterized by;
A. said body of said valve means being rotatably received in said
handgrip;
B. an operating handle carried on the opposed projecting end of
said body.
Description
RELATED APPLICATIONS
This application is an improvement on Applicant's co-pending
application, Ser. No. 147,769, filed May 28, 1971, and now Pat. No.
3,745,655 issued July 17, 1973 and entitled "Endodontic Irrigating
Instrument."
BACKGROUND OF THE INVENTION
This invention primarily deals with a combined instrument capable
of injecting, irrigating, and evacuating root canals in endodontic
work. In this regard the term "irrigating" is used herein to
describe an operation in which fluid is forced into a root canal to
lavage it to eliminate debris. The invention specifically relates
to a multi-purpose instrument capable of performing all of the
above-noted functions and is not intended to be limited to dental
applications in that the injecting function could also have utility
in a medical application as well as a practically foolproof method
of aspirating to avoid injecting into a blood vessel accidentally
and to deliver a hypodermic injection as well.
DESCRIPTION OF THE PRIOR ART
Numerous injectors and irrigators have been utilized in the past
for irrigating and chemically cleansing a root canal after it has
been mechanically opened.
There are also known means for vacuuming the chemical from the root
canal.
The present invention, however, involves an instrument which is
capable of performing all of these functions. It is capable of
being utilized in a "one-hand" operation which is an improvement
over the prior art in existence and known to Applicant which
generally require separate instruments, and is a further refinement
and an improvement upon the above-noted co-pending application of
Applicant.
SUMMARY OF THE INVENTION
It has been discovered that by providing a lightweight plastic body
having a handgrip portion and a capsule-receiving portion, with the
capsule-receiving portion being adapted to receive a disposable
syringe or an ampule as the case may be and the handle portion
being adapted to receive a tube leading to a vacuum source, both
irrigation-injection and evacuation of the root canal of a tooth
can be accomplished.
It has also been found that by providing a telescoping depressor
member which telescopes over the capsule-receiving portion of the
body and has thumb projections thereon, that the material in the
ampule or disposable syringe can be ejected by the operator
utilizing one hand while still holding the instrument in the same
hand.
It has also been found that by providing a unique valving
arrangement, either a passageway leading from the needle, which is
carried on the outboard end of the body to the ampule or disposable
syringe, or the passageway leading to the vacuum source can be
selectively opened or closed as desired, again all by the use of
one hand on the part of the operator.
It has also been found that provision of a disposable valve member
will minimize sterilization and contamination problems, and further
it has been found that the instrument, which will be described in
greater detail below, has utility in medical as well as dental
circumstances.
Accordingly, production of an improved irragating, injecting and
evacuating instrument of the character abovedescribed becomes the
principal object of this invention, with other objects thereof
becoming more apparent upon a reading of the following brief
specification and claims, considered and interpreted in view of the
accompanying drawings.
OF THE DRAWINGS
FIG. 1 is a perspective view of one form of the invention.
FIG. 2 is a sectional view taken along the line 2--2 of FIG. 1 and
showing the device assembled for utilization with a disposable
syringe showing the instrument in its extended position.
FIG. 3 is a sectional view similar to FIG. 2 showing the depressor
in its compressed condition.
FIG. 4 is a sectional view of the outboard end of the depressor
member.
FIG. 5 is a sectional view taken along the line 5--5 of FIG. 2
showing the outboard end of the syringe and its associated
depressor and the internal configuration of the depressor
member.
FIG. 6 is a sectional view taken along the line 6--6 of FIG. 2
showing the outside configuration of the valving means.
FIG. 7 is a sectional view taken along the line 7--7 of FIG. 2
showing the operating handle for the valving means.
FIG. 8 is a sectional view taken along the line 8--8 of FIG. 2
showing the actual valving configuration.
FIG. 9 is a partial sectional view similar to FIGS. 1 and 2 showing
a modified form of the invention utilized in connection with a
capsule.
FIG. 10 is a view similar to FIG. 9 showing the form of the
invention in FIG. 9 in a compressed condition.
FIG. 11 is a sectional view taken along the line 11--11 of FIG.
10.
FIG. 12 is a further sectional view taken along the line 12--12 of
FIG. 10.
FIG. 13 is an exploded perspective view showing one form of valving
means.
FIG. 14 is an exploded perspective view showing a second form of
valving means.
FIG. 15 is a sectional view of the valve head of FIG. 14.
FIGS. 16 and 17 are sectional views showing modified methods for
attaching the barrel and extension barrel to the body of the
instrument.
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS
Turning first to FIG. 1, it will be noted that the instrument,
generally indicated by the numeral 10, includes a handgrip portion
11, a body portion 20, a telescoping depressor member 30, a barrel
50, an extension barrel 60, a disposable syringe 40, and valving
means 80 (see FIG. 2).
Considering in some detail then FIGS. 1 and 2, it will be noted
that the body of the instrument 10 has a handgrip portion 11 which
has a finger-receiving gripping surface 17 contoured to comfortably
fit the hand of the user. A finger extension member 18 is also
provided, and in use it is contemplated that the index finger of
the user would be placed thereon for greater control of the
instrument.
The handgrip portion 11 also includes a plurality of bores 12, 12a,
and 13 through which is passed a tube 14. This tube has a connector
on one end indicated by the numeral 16 and is connected at that end
to a vacuum source (not shown). The opposed end of the tube has a
connector 15 which is connected to the body member 10 that
communicates with a bore 19b, which in turn communicates with a
through bore in the capsule or syringe-receiving portion of the
instrument.
Considering in particular FIGS. 1 and 2 again, the capsule or
disposable syringe receiving portion 20 will be seen to have a
large bore 21 therein, with this bore communicating with a through
passageway 22 leading to the left-hand side of FIG. 2, for example,
and ultimately to needle 70. Received within the bore 21 in FIGS. 1
and 2 is a disposable syringe 40 which has a plurality of indicia
42 thereon which would indicate to the user the amount of fluid in
the syringe itself.
The syringe also has a projecting plunger 41 with an enlarged head
41a on the outboard end thereof and a second head 44 on the inboard
end thereof. It is believed apparent that depression of the plunger
41 by moving it from the right to the left of FIG. 2 would force
fluid contained in the syringe out through the opening 43a and into
passageway 22.
Telescoped over the outboard end of the member 20 is a depressor
member 30. This member is generally hollow in configuration and has
a locating member 33 on one end thereof. This member 33 fits into
the groove 24 in the body 20 and serves to locate the depressor
member in the configuration shown in FIG. 1. Body member 20 also
has a through slot 23 so that once the syringe is properly located
within the body 20, the indicia 42 will be visible to the user.
The depressor member 30 also includes an outboard end 30a which has
an inward projection 32 and a cap 32a thereon. It is intended that
the cap 32a would contact the end 41a of the plunger of the syringe
so that pressure on thumb grip 31 would cause movement of the
barrel 30 from right to left and would move the plunger 41 itself
from the position of FIG. 2 to the position of FIG. 3, thereby
expelling the fluid from the syringe into the passageway 22.
It should be noted also that the normal plunger 41 has flats 43,43
on the head 41a thereof. In this regard the interior of the
depressor member 30 also has flats 34,34 to enable proper registry
between the depressor member 30 and the plunger 41.
Turning next to the valving means 80, it will be noted that these
means include an elongate body portion 82 which is received in the
bore 19 of the handgrip portion of the instrument 10. Valving means
such as 90 or 190 are received on the inboard end of the body
portion 82.
Considering the two alternative forms of the valving means,
attention is first directed to FIGS. 14 and 15.
Thus, in FIGS. 14 and 15 the body 82 has a reduced diameter
projection 83, an enlarged member 84, and a projecting pin 85. It
is contemplated that the actual valve 90 which has a through bore
91 therein can be press-fit over the members 84 and 85 to securely
lock the actual valve itself onto the body 82.
Referring back to FIG. 1, it will be seen that a slot 19a is
provided in the handgrip portion, and a valve actuating handle 81
is fit through it and pinned to valve body 82 so that it can move
from the full-line position of FIG. 7 to the dotted-line position
thereof, thereby selectively aligning the bore 91 with either the
passageway 19b leading to the vacuum source or the passageway 22
leading to the syringe. In this fashion, of course, it is possible
to close off one passage and open the other depending upon whether
the operator desires to inject fluid into the canal or evacuate the
fluid therefrom.
FIG. 13 shows an alternative form of the valving means, generally
indicated by the numeral 180. In this form the body 182 has a
reduced diameter projection 182a and a through bore 181 therein.
Along the bottom surface of the projecting member 182a is a notch
183 which is intended to engage a rib 192 in the valve 190. The
valve 190 also has a through bore 191 therein, and when the valve
190 is telescoped over the projection 182a, bores 181 and 191 will
be in alignment. Operation of this form of the valving means is
indentical to the form shown and described in connection with FIGS.
14 and 15.
In use or operation of the form of the invention shown in FIGS. 1
through 8 and 13 through 15, it is merely necessary to pass the
tube 14 through the holes in the handgrip portion 11 and attach the
connecting member 16 to the vacuum source and end 15 to the body.
Following this, the disposable syringe 40 would be inserted into
the opening in the body portion 20, and the depressor 30 would be
telescoped over the end of the body portion 20 as shown in FIG.
1.
Assuming then that the device is assembled as shown in FIG. 1 and
it is desired to inject fluid into a root canal, for example, it is
merely necessary to insert the needle 70 into the canal and by
means of thumb pressure on member 31 to move the depressor barrel
30 from the right to the left of FIG. 2, for example, thereby
moving the plunger 41 from the position of FIG. 2 to the position
of FIG. 3 and forcing fluid contained in the syringe out through
the end 43 thereof into the passageway 22. It will be assumed at
this time that the valve means are in full-line position of FIG. 7,
in which case the passageway 91 or 191 of the valve, depending upon
which valve is utilized, will have closed off passageway 19b to the
vacuum source and opened up passageway 22.
When it is desired to evacuate the fluid and the loose material in
the canal, it is simply necessary to flip the handle 81 of the
valving means to the dotted-line position of FIG. 7. At this point
passageway 22 is closed off and passageway 19b is open. In this
fashion the material can be pulled through the bores 52 and 62 of
the barrel and barrel extension and out through the tube 14.
Considering next then the modified form of the invention shown in
FIGS. 9 and 10, it will be seen that the basic principles of the
invention remain the same, but that this form of the invention is
intended to be utilized in connection with an ampule which does not
contain its own plunger.
Accordingly then, the outboard end 80a of the depressor member 30
will be seen to have a through bore 30b therein. It is simply
necessary to slip the cap 100 of the plunger over the outboard end
of the member 30, with the shank 101 of the plunger being inserted
through the bore 30b. It will be noted that cap 100 has a
projection 100a on its inner surface, and this projection is
received in groove 122 and 123 of the depressor member. By sliding
projection 100a into groove 122 and then turning the cap, the
projection slides into groove 123 thereby locking the cap in place.
FIG. 9 shows the instrument assembled in this fashion.
It should be noted that the interior of the instrument varies only
slightly in this instance, and that is because a puncturing needle
45 is provided so that when the carpule 140 is pressed to the left
in bore 121, the rubber cap at the end thereof will be punctured to
permit the fluid to be forced out of the capsule.
The valving arrangement is substantially similar, and in operation
it is again merely necessary to utilize the thumb pressure member
31 to move the member 30 and the plunger 101 from the position of
FIG. 9 to the position of FIG. 10, and in this fashion, of course,
the head 102 of the plunger will force the capsule against the
needle, perforating it and forcing the fluid out through the
passageway 22 and ultimately to the needle as described above.
It should be noted here that the vacuuming function is provided and
operated in the same fashion as described with regard to the first
form of the invention discussed.
It will also be noted from FIG. 1 that a barrel 50 and a barrel
extension 60 have been provided, and in the form illustrated in
FIG. 1 these members are screwed into each other as at 51 and 61.
FIGS 16 and 17 show different methods of attaching the device to
the body, with FIG. 16 showing a luer-type of attachment, while
FIG. 17 shows a simple press-fit attachment.
To this end FIG. 16 shows the main body portion 120 having a
luer-type female connection 121 which engages the male connector
152 of the barrel 150. The barrel 150 also has on its opposed end a
female luer-type connection 151 for engagement with the male
luer-type projection 161 of the extension barrel 160.
FIG. 17 shows a simply press-fit in which the body 220 has a female
opening 221 for engagement with the projection 252 of barrel 250.
Similarly, the opposed end of the barrel 250 has a male projection
251 which engages with the female opening 261 of the extension
barrel 260. It should be understood that the invention is not
intended to be limited to any particular form of connection between
the body, the barrel, and the extension barrel, with the forms
described herein being illustrative only and not intended to be
exhasutive.
Depending upon the intended use of the instrument, the barrel 50
could be made integral with the body 20. In fact, it is
contemplated that a one-piece device probably would be preferred in
practice.
It would also be possible to eliminate the extension barrel 60 and
affix the needle directly to barrel 50 if desired.
It should also be noted that valve 90 or 190 can both be made of a
disposable nature to avoid reuse and possible contamination in view
of the fact that when the evacuation mechanism is actuated,
material which has been inside the mouth and root canal of the
patient will be extracted through this valve. It is believed to be
desirable to make it disposable, if possible, to minimize
sterilization and contamination problems, particularly if it is to
be used as an aspirating/hypodermic syringe.
While no material has been described and the invention is not
intended to be limited to any material, it is contemplated that the
entire device, with the exception, of course, of the tubing and the
needle, could be made of lightweight clear plastic which is
intended to be economical in manufacture and also to be easier to
use because of the weight which would minimize the strain on the
dentist's hand.
It should also be noted that the utilization of the instrument
described herein is not in any way intended to be limited to dental
operations. It is believed evident that the instrument would have
utility in medical applications, particularly with regard to the
injection function which is capable of performing.
Furthermore, the terms "ampule," "carpule," "cartridge," and
"disposable syringe" have been used interchangeably herein, and it
is believed apparent that any such device could be received in
bores 21 and 121.
While a full and complete description of the invention has been set
forth in accordance with the dictates of the Patent Statutes, it is
to be understood that modifications may be resorted to without
departing fron the spirit hereof or the scope of the appended
claims.
* * * * *