U.S. patent number 3,750,966 [Application Number 05/158,469] was granted by the patent office on 1973-08-07 for syringe destructing device.
This patent grant is currently assigned to Control Products Corporation. Invention is credited to Bryce P. Anderson.
United States Patent |
3,750,966 |
Anderson |
August 7, 1973 |
SYRINGE DESTRUCTING DEVICE
Abstract
A syringe destructing device includes breaking means in the form
of a pair of counter-rotating toothed rolls which fracture an
unbroken syringe passing therethrough into a plurality of discrete
pieces. The teeth on the rolls are of a unique, sharp-edged
configuration and the rolls are disposed with respect to one
another so that at the nip therebetween, a sharp edge on the tooth
from one roll just contacts the sharp edge on the tooth on the
opposite roll.
Inventors: |
Anderson; Bryce P. (Berkeley,
CA) |
Assignee: |
Control Products Corporation
(Salt Lake City, UT)
|
Family
ID: |
22568278 |
Appl.
No.: |
05/158,469 |
Filed: |
June 30, 1971 |
Current U.S.
Class: |
241/99; 241/100;
241/606; 241/235 |
Current CPC
Class: |
B02C
13/20 (20130101); B02C 18/142 (20130101); B02C
19/0075 (20130101); A61M 5/3278 (20130101); A61M
2005/3282 (20130101); Y10S 241/606 (20130101) |
Current International
Class: |
B02C
18/14 (20060101); B02C 13/20 (20060101); A61M
5/32 (20060101); B02C 18/06 (20060101); B02C
13/00 (20060101); B02c 018/06 (); B02c
013/20 () |
Field of
Search: |
;241/99,100,235,236 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Spruill; Robert L.
Claims
What is claimed is:
1. A syringe destructing device comprising:
breaking means for fracturing a syringe into a plurality of
discrete pieces to prevent re-use thereof;
means for supplying an unbroken syringe to said breaking means;
and
receiving means for receiving said discrete pieces from said
breaking means;
said breaking means including a pair of counter- rotating rolls,
each of which carries tooth means about the exterior surface
thereof, said rolls being driven at equal speeds and in opposite
rotational directions;
each of said tooth means including a first portion extending
radially of said roll and a second portion extending angularly in
the direction of roll rotation from the inner end of a first
portion to the outer end of the next adjacent first portion;
the juncture of a second portion with the outer end of a first
portion forming a sharp edge;
said rolls being cylindrical in configuration and mounted for
rotation about spaced parallel fixed axes and said axes being
spaced apart by a distance sufficient so that a sharp edge on one
roll contacts a sharp edge on the opposite roll to form a nip in a
plane passing through both axes;
said rolls containing a sufficient number of teeth so that a
syringe passes through said breaking means and passes progressively
through said nip, it will be broken into a plurality of discrete
pieces.
2. A syringe destructing device as defined in claim 1 wherein the
first portions on the teeth forming said nip are disposed within
said plane.
3. A syringe destructing device as defined in claim 1 wherein said
device further includes a casing and wherein said receiving means
is an open-topped receptacle movably mounted beneath said breaking
means.
4. A syringe destructing device as defined in claim 3 wherein said
means for supplying the syringe includes an opening in said casing
above said breaking means and a sleeve mounted in said opening,
said sleeve having a closed top and a feeding port in the side
thereof.
Description
This invention relates to a syringe destructing device which finds
particular utility in hospitals, clinics and other locations where
a large quantity of syringes are commonly used.
As used herein, the term "syringe" can include the injection
cartridge without a needle thereon or with a needle thereon.
Once a syringe has been used to inject medication into a patient in
a hospital, clinic or physician's office, a problem arises as to
how to dispose of the used syringe. It has been found that drug
addicts will often attempt to acquire such used syringes for the
purpose of subsequent use for drug injections. However, since such
used syringes are not properly sterilized and are not actually
intended for reuse, there is the danger that any such addict who
uses such a syringe could contract serum hepatitis. Also, aside
from the problem of drug addicts, there is simply the question of
where to place the used syringes and how to dispose of the same. If
such used syringes are simply dropped in a trash basket or bag,
there is a strong likelihood that maintenance personnel who collect
and handle such trash might become inadvertently scratched by the
needles and contract infection therefrom.
The problem of used syringes and the manner of disposing of the
same has been considered in the past and two separate procedures
have been proposed. However, it has been found that neither of such
proposals has been entirely satisfactory in practice. One such
proposal involves breaking the tip off the needle and breaking the
cartridge portion in half. The other proposal involves separating
the needle from the cartridge portion and melting the cartridge
portion in a furnace. Neither of these procedures has proved
entirely satisfactory if for no other reason than both require the
use of highly skilled and highly paid nurses to spend a
considerable amount of time breaking needles. Also, in doing so,
these nurses must be quite careful not to themselves become
scratched by the needles. Additionally, it is thought that even
where the tip of the needle and a portion of the cartridge have
been broken away, the remaining shank of the needle and the
attached portion of the cartridge can still be reused by a
desperate addict.
In view of the foregoing, it is accordingly, an object of the
present invention to overcome the difficulties and deficiencies
associated with prior art techniques for syringe destruction and to
provide in their stead, a new and improved syringe destructing
device.
Another object of the present invention is to provide a syringe
destructing device wherein the operator will have minimal contact
with the syringe, yet wherein the syringe will be completely
destroyed and incapable of being reused.
Another object of the present invention is to provide a simple yet
highly efficient apparatus which is capable of rapidly fracturing a
syringe cartridge and needle into a plurality of separate and
discrete parts which are incapable of reuse.
Other objects, advantages and salient features of the present
invention will become apparent from the following detailed
description, which, taken in conjunction with the annexed drawings,
discloses a preferred embodiment thereof.
The foregoing objects are attained by providing a device with a
unique form of breaking means therein. The breaking means consists
of a pair of counter-rotating rolls, each of which carries a
plurality of surface teeth having sharp outer edges. The rolls are
disposed with respect to one another so that the sharp edge of a
tooth on one roll just contacts the sharp edge of a tooth on the
opposite roll, at the nip formed between the rolls. This type of
arrangement should be contrasted with various known forms of
crushing devices utilizing counteracting gears and the like
therein. In such devices, the peak of one gear fits into the valley
on the opposed gear to provide a meshing relationship which is
intended to accomplish the crushing or breaking operation. Such an
arrangement would not be operative to fracture the syringes for
which the present invention is intended, since the plastic material
of the cartridges would quickly clog the valleys or depressions in
the gears, thus hampering operations. However, because of the
unique tooth configuration herein, when coupled with the careful
alignment of the opposed breaking rolls, it is found that repeated
and continued breaking operations can occur without any clogging of
the teeth for the valleys therebetween.
Referring now to the drawings, which form a part of this original
disclosure:
FIG. 1 is a perspective view of a syringe destructing device in
accordance with the principles of the present invention;
FIG. 2 is a longitudinal sectional view of the device of FIG. 1,
looking in the direction of the line 2--2 of FIG. 3; and
FIG. 3 is a transverse sectional view of the device, looking in the
direction of the line 3--3 of FIG. 2;
Referring now to the drawings in further detail, the syringe
destructing device as shown in FIG. 1 is generally designated 10.
Such device includes a generally rectangular casing having a pair
of opposed side walls 12 and 14, a rear wall 16, a forward wall 18,
a top wall 20 and a bottom wall 22. Within the casing 10, there is
provided a breaking means generally designated 24 for fracturing a
syringe into a plurality of discrete pieces to prevent reuse
thereof. Means generally designated 26 are provided for supplying
an unbroken syringe S to the breaking means 24. As shown in FIG. 2,
the syringe S includes a plunger and cartrige portion 28 and an
attached needle portion 30. Finally, the device 10 includes a
receiving means generally designated 32 for receiving the discrete
and broken pieces from the breaking means 24.
Considering first the means 26 for supplying the syringe S to the
breaking means, an opening 34 is formed in top wall 20 of the
casing, above the breaking means 24, and a sleeve is disposed
within the opening 34. The sleeve includes a hollow square or
rectangular upper portion 36 and a depending tapered frusto-conical
guide portion 38. The top of the upper sleeve portion 36 is closed,
but a feeding port 40 is formed in one side thereof. The entire
sleeve can be manually inserted through the opening 34 so that the
upper portion 36 rests upon the top casing wall 20 while the
depending portion 38 projects through the opening 34 and into the
interior of the casing to guide a syringe S into the breaking means
24. Because the top of the sleeve 36 is closed and the feeding port
40 is formed in the side thereof, the chance that any upwardly
flying scraps from the breaking means could escape from the sleeve
is reduced materially.
The receiving means 32 includes an open-topped drawer 42, the
bottom of which rests upon the bottom wall 22 of the casing and the
forward wall 44 of which fits within a congruent opening in the
front casing wall 18. A handle 46 is attached to the front wall 44
of the drawer 42 to enable the drawer to be manually removed and
emptied at periodic intervals. Side guide rails 48 coact in
cooperation with the drawer 42 to guide it into and out of the
casing and to facilitate its sliding movement therein.
The breaking means 24 includes a pair of counter-rotating generally
cylindrical rolls 50, each of which is fixed upon a transversely
extending shaft 52, the ends of which are journaled in bearings 54
attached to the interior of the casing side walls 12 and 14. Each
shaft 52 carries a drive gear 56 and a collar 58 to lock the same
onto the shaft 52. An idler gear 60 mounted in similar manner,
cooperates with the inner most of the gears 56 and serves to mesh
the same with a drive gear 62 which is mounted by a locking collar
64 onto a drive shaft 66 of a suitable drive motor 68. The drive
motor 68 is supported upon a bracket or a platform 70 attached to
the rear wall 16 of the casing. Thus, when the drive motor 68 is
energized, by any suitable actuating means, the rolls 50 are caused
to rotate in opposite directions as shown by the arrows thereon in
FIG. 2, to create a downward feeding motion. Each of the rolls 50
carries a plurality of tooth means about the exterior surface
thereof. Such tooth means, in each instance, includes a first
portion 72 which extends radially of the roll 50 and a second
portion 74 extending angularly in the direction of roll rotation
from the inner end of a first portion 72 to the outer end of the
next adjacent first portion 72. Thus, at the outer end where a
portion 72 merges with a portion 74, a sharp edge 76 is created and
this sharp edge is axially elongated along the axis of rotation
passing through each shaft 52. In other words, the sharp edges 76
actually form elongated blades which perform the breaking
operation.
As shown in FIG. 2, the shafts 52 and hence the axes of rotation
are aligned parallel with one another, with both axes of rotation
lying in a common plane. The shafts 52 and hence the axes of
rotation are spaced apart by a distance sufficient so that a sharp
edge 76 on one roll just contacts against a sharp edge 76 on the
opposite roll to thus form the nip between the two rolls. It will
also be seen that at the nip, there are two first tooth portions
designated 72' which are coplanar with one another and which lie in
the same plane as the plane containing the axes of rotation for the
two rolls.
A sufficient number of teeth are provided along the exterior
surface of each of the rolls 50 so that as the syringe S passes
therebetween, it progressively moves through the nip and is
progressively contacted by several separate sets of sharp edges 76
on the teeth. This causes the syringe S to be broken into a
plurality of discrete pieces P which fall into the drawer 42 which
acts as the receiving means. It is important in the present
invention that there be an adequate number of teeth about the
exterior surface of each roll 50 to assure that the syringe will be
broken at multiple locations and into multiple pieces. It is also
important to note that the sole contact between either of the rolls
or the teeth thereon occurs as a line to line contact between the
sharp edges 76 just at the plane passing through the nip. Thus, not
only does the syringe gravitationally drop into the breaking means,
but additionally, the forward rotating motion of the rolls and the
teeth thereon actually feed the syringe through the nip as the
breaking occurs.
It is preferred that the number of teeth formed about the periphery
or exterior surface of each roll be between 10 and 30. In one
satisfactory embodiment of the invention, 20 separate teeth were
formed along the exterior of each roll. The width of each roll was
2-1/2 inches and the outside tooth diameter, measured from one
sharp edge 76 to its diametrically opposite edge 76, was also 2-1/2
inches. The diameter of the roll 50 was 1-3/4 inches, thus making
each tooth 3/8 inch in height, as measured along the first portion
72 thereof.
After reading the foregoing detailed description, it should be
apparent that the objects set forth at the outset thereof have been
successfully achieved. However, while the invention has been
described and is hereinafter claimed in connection with "syringes"
per se, it will be apparent to those skilled in the art that the
apparatus disclosed herein can also be used for the destruction of
other materials, such as plastic tubing, test tubes, vacu-tainer
needles, and the like. Use of the apparatus for such purposes is
regarded and falling within the spirit and scope of the appended
claims.
* * * * *