Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
2001-08-29
2003-06-03
Casler, Brian L. (Department: 3763)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S151000
Reexamination Certificate
active
06572585
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a portable automatic syringe device, and more particularly to a remote-controlled portable automatic syringe device including a syringe pump configured to dispense with any display means while operating in a remote controlled fashion and a remote controller adapted to control the syringe pump and provided with a display, thereby being capable of allowing the user to conveniently control the syringe pump by use of the remote controller while viewing the display without a requirement to expose the syringe pump for a manipulation thereof, so that the privacy of the user can be secured.
2. Description of the Prior Art
Automatic syringe devices, which enable an injection of liquid medicine for a prolonged time, are well known. Typically, known automatic syringe devices have a configuration in which a push means for pushing a syringe piston is coupled to a housing receiving an injection syringe. For example, such automatic syringe devices are disclosed in Japanese Utility Model Laid-open Publication No. Sho. 52-3292 and U.S. Pat. No. 4,417,889. The syringe device disclosed in Japanese Utility Model Laid-open Publication No. Sho. 52-3292 has inconvenience in carrying it because it has an injector mounted outside a basic case, thereby requiring a double case structure. In order to solve such a disadvantage, an automatic syringe device requiring no double case structure has been proposed, as in the above mentioned U.S. Pat. No. 4,417,889.
FIGS. 1 and 2
illustrate a control circuit and a structure of the automatic syringe device disclosed in U.S. Pat. No. 4,417,889, respectively. Referring to
FIG. 1
, the output of an oscillator A
1
is coupled to a timer A
2
which is, in turn, coupled at its output to a digital comparator A
3
. The digital comparator A
3
also receives an output from a fixed number switch A
4
. The output of the digital comparator A
3
is connected to a counter A
6
and an R/S flip-flop A
9
. Another oscillator A
5
is also provided which has an output coupled to counters A
6
and A
13
, and AND gates A
10
and A
11
. The flip-flop A
9
is reset by an output from a digital comparator A
7
. Another R/S flip-flop A
16
is also provided which is reset by an output from a digital comparator A
14
coupled to the counter A
13
. A control unit A
17
is also coupled to the counter A
13
. The control unit A
17
serves to activate the counter A
13
in accordance with an operation of a manual infusion switch A
12
. The control unit A
17
applies its output to the counters A
13
and A
16
. The output from the control unit A
17
is also sent to a counter A
21
. The output of the counter A
21
is coupled to a digital comparator A
22
which is, in turn, coupled to a step motor driver A
19
for driving a step motor A
20
. The output of the flip-flop A
16
is coupled to one input of the AND gate A
11
, which is also coupled at the other input thereof to the oscillator A
5
. The output of the AND gate A
11
is coupled to one input of an OR gate A
18
. Fixed number switches A
15
and A
25
are connected to the digital comparators A
14
and A
22
, respectively. Each of the fixed number switches A
4
, A
8
, A
15
, and A
25
has five protruding insert bars and serves to provide a reference value for an associated one of the digital comparators A
3
, A
7
, A
14
, and A
22
. A light source A
24
and a photo sensor A
23
are coupled to the counter A
21
in order to provide sensing results thereof to the counter A
21
, respectively. Referring to
FIGS. 2 and 3
, the arrangements of the light source A
24
and photo sensor A
23
are illustrated. As shown in
FIGS. 2 and 3
, the light source A
24
and photo sensor A
23
are arranged in such a fashion that they face each other while being vertically spaced from each other. A gear plate, which is included in a gear mechanism G, is interposed between the light source A
24
and photo sensor A
23
. The gear plate has a plurality of through holes A
26
uniformly spaced from one another in a circumferential direction, as shown in FIG.
3
. The gear plate is fixedly fitted around a gear shaft A
27
having a screw portion. A piston plate A
28
is threadedly coupled to the gear shaft A
27
in the form of a nut in such a fashion that it slides along the screw portion of the gear shaft A
27
when the gear shaft A
27
rotates. The rotation of the gear shaft A is carried out by a drive force from the motor A
20
transmitted via the gear mechanism G. The driving of a motor M (corresponding to the motor A
20
in
FIG. 1
) is controlled by the operations of the counter A
21
, digital comparator A
22
, switch A
25
, and motor drive A
19
. The above mentioned elements of the syringe device are received in a housing, as shown in FIG.
2
. In particular, the light source A
24
and photo sensor A
23
are fixedly mounted at an upper portion of the housing by means of a bracket fixed to the housing. In this syringe device, a liquid medicine, such as insulin, contained in a syringe I is outwardly injected through an injection needle N connected to the syringe I, by a sliding movement of the piston plate A
28
. In such a syringe device, however, the housing and syringe I thereof are exposed to ambient air. As a result, moisture and water are likely to penetrate into the syringe device. For this reason, there is inconvenience in that if the user desires to take a shower while the syringe is in place, then the housing should be contained in a separate sealing case.
In order to solve such a problem, a sealable syringe device has been proposed by the applicant. Such a sealable syringe device is illustrated in
FIG. 4
which is a front view. Referring to
FIG. 4
, the syringe device includes a cover
10
sealably coupled to the upper end of a housing
20
, and a bottom cover
40
sealably coupled to the lower end of the housing
20
. A connector
2
, to which a feeding tube
1
is integrally connected, is threadedly coupled to the cover
10
. The connector
2
communicates with a syringe
21
received in the housing
20
. A piston
22
is slidably fitted in the syringe
21
. A liquid medicine to be injected is contained in the syringe
21
. A power transmission means
30
is mounted on the bottom surface of the housing
20
. The power transmission means
30
has a rotating shaft
31
to which a disc type push means
50
is threadedly coupled. The disc type push means
50
moves vertically by a rotation of the rotating shaft
31
, thereby vertically moving the piston
22
.
Referring to
FIG. 5
, which is a plan view of
FIG. 4
, the cover
10
, to which the connector
2
connected with the feeding tube
1
is connected, is arranged on the left portion of the upper surface of the housing
20
. A battery cover
24
is arranged on the right portion of the upper surface of the housing
20
.
FIG. 6
is a cross-sectional view taken along the line A—A of FIG.
5
. As shown in
FIG. 6
, the cover
10
is centrally provided with a threaded hole
11
in which the connector
2
is threadedly fitted at its lower end. The threaded hole
11
has threads
11
-
1
. The connector is formed, at its lower end, with threads
2
-
15
to be threadedly coupled with the threads
11
-
1
of the threaded hole
11
. The cover
10
is also provided at its lower end with a bolt portion
12
threadedly fitted in the upper end of the housing
20
. A packing
13
is fitted around the bolt portion
12
of the cover
10
between the lower end of the cover
10
and the upper end of the housing
20
. A syringe receiving chamber
23
is defined in the interior of the housing
20
. The push means
50
is fitted in the lower end of the housing
20
in such a fashion that it slides vertically in the housing
20
. The housing
20
is also formed at its inner surface with a vertical push means guide groove
25
adapted to guide a vertical movement of the push means
50
and vertical piston guide grooves
27
adapted to guide a vertical movement of the piston
22
.
FIG. 7
shows a detailed configuration of the power transmission m
Casler Brian L.
Sheridan Ross PC
Thompson Michael M
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