U.S. patent number 3,889,673 [Application Number 05/429,850] was granted by the patent office on 1975-06-17 for tip assembly for syringes.
This patent grant is currently assigned to Survival Technology, Inc.. Invention is credited to Elliot Bartner, Brian H. Dovey, Sheldon Kaplan, Stanley J. Sarnoff.
United States Patent |
3,889,673 |
Dovey , et al. |
June 17, 1975 |
Tip assembly for syringes
Abstract
A tip assembly for a syringe wherein the assembly includes a
cylindrical main body having an open forward end and a partially
closed back end. The inner surface of the main body adjacent the
back end has an annular seal. An inner cylindrical body is
positioned within and coaxial with the main body forwardly of the
annular seal. A flange-like member connects the inner body to the
main body to retain the inner body in spaced relation within the
main body. A cap is provided for closing the open end of the main
body. A needle assembly is supported by the inner body within the
main body. This needle assembly has a hub with a hole extending
therethrough. A needle is held in the forward portion of the hub
and a portion of the hub rearwardly of the needle is sized to fit
in the inner body to position the needle assembly within the main
body.
Inventors: |
Dovey; Brian H. (Rockville,
MD), Bartner; Elliot (Piscataway, NJ), Kaplan;
Sheldon (Potomac, MD), Sarnoff; Stanley J. (Bethesda,
MD) |
Assignee: |
Survival Technology, Inc.
(Bethesda, MD)
|
Family
ID: |
23704975 |
Appl.
No.: |
05/429,850 |
Filed: |
January 2, 1974 |
Current U.S.
Class: |
604/192;
206/365 |
Current CPC
Class: |
A61M
5/31 (20130101); A61M 5/3202 (20130101) |
Current International
Class: |
A61M
5/31 (20060101); A61M 5/32 (20060101); A61m
005/32 () |
Field of
Search: |
;128/215,216,221,218N,218R,272,214R,214.2,218M,218F
;206/364-366,438 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: McGowan; J. C.
Attorney, Agent or Firm: Witherspoon and Lane
Claims
We claim:
1. A tip assembly comprising:
a cylindrical main body, said main body having an open forward end
and a partially closed back end, the inner surface of the main body
adjacent the back end having a pair of spaced annular sealing rings
extending inwardly therefrom,
an inner body positioned within the main body forwardly of the
sealing rings, the outer surface of the inner body being equispaced
from the inner surface of the main body, the inner surface of the
inner body being hexagonal, means connecting the inner body to the
main body and retaining same in the aforesaid spaced relation,
the forward end of the main body being provided with a retaining
groove,
a cap fitting over the open end of the main body, said cap having a
cup-shaped configuration including a bottom and a cylindrical wall
extending therefrom, holding means on the outer surface of the cap
wall to engage the retaining groove in the main body, a plurality
of spacing bars on the outer surface of the cap wall generally
perpendicular to the cap bottom, the length of said spacing bars
being such that they abut the forward edge of the main body when
the cap is positioned on the main body and the holding means are
seated in the retaining groove, and
a needle assembly carried within the main body by the inner body,
said needle assembly comprising a hub member having an enlarged
rear portion, a hexagonally shaped middle portion and a forward
portion having a cross section smaller than the middle portion, the
hub having a hole extending completely therethrough, a needle
positioned in the forward portion of the hub and held therein by
the swaging of said hub portion into firm engagement with the
needle, the hexagonal middle portion of the hub being sized to
snugly fit into the hexagonal inner surface of the inner body
whereby the needle assembly is firmly held in position within the
main body
2. A tip assembly adapted for use in conjunction with a medicament
container from which the medicaments are removed by a needle
wherein the dispensing end of the container has a body portion from
which extends an outer sleeve having its inner surface threaded,
and an inner sleeve also extending forwardly from said body, the
inner sleeve being positioned within and spaced from the outer
sleeve, said inner sleeve being tapered so as to enlarge in the
direction of the body and in communication with the medicament in
the container, said tip assembly comprising:
a cylindrical main body, said main body having an open forward end
and a partially closed back end, the inner surface of the main body
adjacent the back end having circumferential sealing means
extending inwardly therefrom, said sealing means being adapted to
sealingly engage the outer surface of the outer sleeve on the
medicament container when the tip assembly is operatively connected
to said container,
an inner cylindrical body within and coaxial with the main body
forwardly of the sealing means, means connecting the inner body to
the main body to retain the aforesaid spaced relation, the inner
surface of the inner body being hexagonal in cross section,
a cap fitting over the open end of the main body, said cap having a
cup-shaped configuration including a bottom and a cylindrical wall
extending therefrom, cooperating retaining means on the outer
surface of the cap wall and the inner surface of the main body to
hold the cap on the main body,
a needle assembly carried within the main body by the inner body,
said needle assembly comprising a hub member having an enlarged
rear portion adapted to engage the threads on the inner surface of
the outer sleeve of the container, a hexagonally shaped middle
portion and a forward portion of smaller diameter than the middle
portion, the hub having a hole extending completely therethrough, a
needle fixedly mounted in the forward portion of the hub, the
rearward portion of the hub hole being sized to conformingly engage
the tapered inner sleeve of the container, the hexagonal portion of
the hub being sized to operatively fit into the hexagonal inner
surface of the inner body whereby the needle assembly is firmly
held in position within the main body, and
whereby when the tip assembly is operatively mounted on the
dispensing end of the container all of the components of the tip
assembly remain in fixed position during use except for the cap
which is removed to expose the needle prior to use.
Description
SUMMARY OF THE INVENTION
This invention relates to apparatus in the syringe field and, more
particularly, to a tip assembly for use in conjunction with a
syringe.
In this age of specialization in the medical field, it is
imperative that some action be taken to cut down the high number of
component requirements, particularly with regard to syringes and
related apparatus. It is with this in mind that the present tip
assembly has been developed.
In view of the foregoing, it is an object of this invention to
provide a tip assembly for syringes which has great adaptability
both with regard to the syringes on which it is used and to the use
to which the syringes are put.
It is yet another object of this invention to provide a tip
assembly which will provide safer means for storage of the syringe
with inserted cannula, ready for use upon removal of the cap or cap
and body depending upon the use prescribed.
The above and additional objects and advantages will become more
apparent when taken in conjunction with the following detailed
description and drawings.
IN THE DRAWINGS
FIG. 1 is a plan view partly in section illustrating the tip
assembly and its attachment to a syringe,
FIG. 2 is a view showing the use of the tip assembly with a
flexible dispensing bag, and
FIG. 3 is a view depicting the use of the tip assembly wherein the
cap and main body have been removed and the needle has been
introduced into a bottle of medicament.
DETAILED DESCRIPTION
As best illustrated in FIG. 1, the tip assembly 10 comprises a
cylindrical main body 12 having an open forward end 14 and a partly
closed back end 16. The inner surface 18 of the main body 12 is
provided with a pair of axially spaced annular sealing rings 20
adjacent the back end 16. An integral cylindrical inner body 22 is
coaxially positioned within the main body 12 forwardly of the
sealing rings 20. This inner body 22 is attached to the main body
12 by means of a flangelike member 24 extending inwardly from the
inner surface 18 of the main body 12. The outer surface 26 of the
inner body 22 is equidistant from the inner surface 18 of the main
body. The inner surface 28 of the inner body 22 is hexagonal in
cross section for cooperation with the needle hub as will be
described later.
Referring to FIGS. 1 and 2, the inner surface 18 of the main body
12 is provided with a retaining groove 34 adjacent the forward end
of said body. A cap 36 fits into the open forward end 14 and is
provided with locking ring 38 on its outer cylindrical surface for
engagement with the retaining ring 34 to hold the cap in position
on the main body. In addition, the cap 36 is provided with a
plurality of longitudinally extending spacing bars 40 equispaced
around the outer surface 42 of the cap 36. The length of the
spacing bars 40 is such that the end opposite of the cap head 44
will abut the front extremity 45 of the main body 12.
A needle assembly 48 is carried by the inner body 22 with the
hexagonal portion 50 of the needle hub 52 fitting into the
hexagonal opening 28 in the inner body 22. More specifically, the
needle hub 52 comprises an enlarged rear portion 54, a hexagonally
shaped midportion 50 and a forward portion 56 having a diameter
smaller than that of the mid or rear portion 50 and 54,
respectively. The hub 52 is provided with a longitudinal
throughbore into which needle 60 is introduced at the forward hub
end. The needle is conventionally held in the hub by swaging,
however, any other suitable means may be used for the purpose of
fastening the needle to the hub in an operational manner. The
length of the needle 60 is such that a portion of same extends
outwardly beyond the open end 14 of the main body 12. The rear
enlarged hub portion 54 is formed with an upstanding outward lip 64
on its open end while the inner surface 66 of the rear hub portion
54 is provided with the conventional Luer taper.
The tip assembly of this invention can be used with a large
capacity syringe of the type disclosed in pending application Ser.
No. 401,272, filed Sept. 27, 1973, in the names of Elliot Bartner,
Edward M. Curley, Sheldon Kaplan and Stanley J. Sarnoff.
The tip assembly 10 is received by the syringe barrel 70 in the
following manner. The tip assembly mounting arrangement comprises a
threaded body portion 72 threadedly carried in an appropriately
threaded portion 74 of the syringe barrel 70. A horizontal
hexagonally shaped portion 76 extends outwardly from the threaded
body portion 72 for wrench use when assemblying the unit. An outer
sleeve 78 projects forwardly from the horizontal portion 76 and has
its inner surface 80 formed with conventional "Luer-Lok" threads
82. An inner sleeve 90 extends forwardly from the body 81 coaxially
within the outer sleeve 78. The outer surface 92 of the inner
surface 90 is provided with the usual Luer taper to cooperate with
the Luer taper of inner surface 66 of the needle hub rear portion
54.
In applying the tip assembly 10 of this invention to the syringe
unit disclosed in FIG. 1 and more fully covered in copending
application Ser. No. 401,272, filed Sept. 27, 1973, the tip
assembly is slipped onto the syringe body passing the sealing rings
20 of the main body 12 over the outer sleeve 78 and simultaneously
causing the hub flange 64 to engage the Luer Lok threads 82 and the
tapered outer surface 92 of inner sleeve 90 to snugly engage the
inner tapered surface 66 of the rear hub portion 54. Thus the
syringe unit complete with removable tip assembly is ready for
use.
One of the conventional uses of a syringe unit such as this is in
intravenous apparatus and, more particularly, wherein it is desired
to add a medicament to the receptacle from which the liquid is
being dispensed. One form of such receptacle is a flexible bag
having a plurality of nipple connections extending therefrom which
are adapted to accommodate conventional connecting devices.
As illustrated in FIG. 2, the cap 36 has been removed from the tip
assembly 10 and the needle 60 has been introduced into and through
flexible stopper 100 carried on the bag nipple 102.
As illustrated in FIG. 3, the cap 36 and main body 12 with integral
inner body 22 have been removed from the tip assembly 10 so that
the long shank of the needle 60 is available for insertion in
various types of medicament containing units 110. As shown, the
needle 60 is passed through a flexible stopper 112 to reach the
medicament 114.
As might be expected, the body of the tip assembly can most
advantageously be made from a plastic material. The cannula and hub
should be made from conventional materials which are well known to
the art. Adaptability and versatility of cannula size with regard
to different types of syringes make the tip assembly aforedescribed
a very useful and necessary piece of apparatus.
* * * * *