CN107997949B - Pneumatic counter - Google Patents
Pneumatic counter Download PDFInfo
- Publication number
- CN107997949B CN107997949B CN201711410747.4A CN201711410747A CN107997949B CN 107997949 B CN107997949 B CN 107997949B CN 201711410747 A CN201711410747 A CN 201711410747A CN 107997949 B CN107997949 B CN 107997949B
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- China
- Prior art keywords
- gear
- stop
- vent valve
- pneumatic
- shaft
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H31/00—Artificial respiration or heart stimulation, e.g. heart massage
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/08—Design features of general application for actuating the drive
- G06M1/12—Design features of general application for actuating the drive by fluid means
- G06M1/123—Design features of general application for actuating the drive by fluid means by pneumatic means
Abstract
The invention relates to a pneumatic counter, which comprises a first pneumatic valve, a vent valve, a first connecting rod, a shifting fork and a gear set, wherein the gear set comprises an input gear and an output gear which can simultaneously rotate at a set rotation speed ratio; the output end of the first pneumatic valve is connected with the shifting fork through the first connecting rod and drives the shifting fork to swing reciprocally around the shaft, and the shifting fork is abutted on the input gear and toggles the input gear to set the displacement rotation of the number of gear teeth through the reciprocal swing around the shaft; the output gear is characterized in that a circular protrusion is arranged on one side face of the output gear, a mutation structure is arranged on the outer circumference of the protrusion, a vent valve switch for controlling the vent valve to start and stop is connected to the vent valve, and the vent valve switch comprises a trigger end which is always abutted to the outer circumference of the protrusion. The invention adopts a mechanical counting mode to count the pressing times of the cardiopulmonary resuscitation machine, thereby improving the safety performance of the cardiopulmonary resuscitation machine.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a pneumatic counter.
Background
Cardiopulmonary resuscitation is both specialized emergency medicine and the core content of current rescue, and is one of the most important emergency modes, which is an effective emergency measure taken when life is critical. Cardiopulmonary resuscitation is a strict requirement on the rhythm of chest compressions, and every 30 compressions, the rescuee needs to be ventilated once (the compressions are interrupted during ventilation), and the interruption time is less than 5 seconds. In the prior art, the electronic device is generally used for counting the pressing, and under the condition of using oxygen for ventilation, as oxygen is a good combustion improver, the safety problems such as equipment ignition and the like are easily caused by sparks generated when the electronic device is in failure.
Disclosure of Invention
The invention aims to provide a pneumatic counter which adopts a mechanical counting mode to count the pressing times of a cardiopulmonary resuscitation machine, thereby improving the safety performance of the cardiopulmonary resuscitation machine.
In order to achieve the above object, the present invention provides a pneumatic counter comprising a first pneumatic valve, a vent valve, a first link, a fork and a gear set, the gear set comprising an input gear and an output gear, the input gear and the output gear being capable of simultaneously rotating at a set rotation speed ratio; the output end of the first pneumatic valve is connected with the shifting fork through the first connecting rod and drives the shifting fork to swing reciprocally around the shaft, and the shifting fork is abutted on the input gear and toggles the input gear to set the displacement rotation of the number of gear teeth through the reciprocal swing around the shaft; the utility model discloses a breather valve, including output gear, including the breather valve, be equipped with circular or ring shape arch on one side of output gear, protruding with output gear sets up with one heart, be equipped with abrupt change structure on the bellied outer circumference, be connected with the control on the breather valve opens the breather valve switch that stops, the breather valve switch including always with the triggering end of bellied outer circumference looks butt, works as the triggering end arrives when abrupt change structure, the breather valve is opened.
As a preferable scheme, the pneumatic counter further comprises a second pneumatic valve, a second connecting rod and a clutch bracket, and the gear set further comprises an enabling gear which can be meshed with the input gear and the output gear at the same time; the output end of the second pneumatic valve is connected with one end of the clutch support through the second connecting rod and drives the clutch support to swing around the shaft in a reciprocating manner, the enabling gear is arranged on the clutch support, and the enabling gear is meshed with or separated from the input gear and the output gear simultaneously through the clutch support to swing around the shaft in a reciprocating manner.
Preferably, the input gear comprises a first gear and a second gear which are coaxial and synchronously rotate, the shifting fork is connected with the first gear through the second gear and drives the first gear to rotate, and the enabling gear can be meshed with the first gear and the output gear at the same time.
As a preferable scheme, the shifting fork is provided with convex teeth, and the convex teeth are meshed with the second gear and drive the second gear to rotate.
Preferably, the addendum circle of the first gear is inscribed with the addendum circle of the output gear.
Preferably, the gear ratio of the first gear to the second gear is 2:1, and the shifting fork drives the second gear to rotate with displacement of one gear tooth at a time by reciprocating around the shaft.
Preferably, the abrupt change structure is an arc groove or an arc protrusion arranged on the outer circumference of the protrusion.
As the preferable scheme, the pneumatic counter further comprises a shell, a spring is arranged between the vent valve switch and the vent valve, one end of the spring is fixed on the shell, and the other end of the spring is abutted to the vent valve switch, so that the triggering end of the vent valve switch is always abutted to the outer circumference of the protrusion.
As an optimal scheme, the pneumatic counter further comprises a stop mechanism, the stop mechanism comprises a stop rod and an eccentrically arranged limiting surface arranged on the side surface of the output gear, one end of the stop rod is connected with the clutch bracket, and the stop rod is driven to swing around a shaft in a reciprocating manner through the clutch bracket, so that the other end of the stop rod is abutted to or separated from the limiting surface.
Preferably, the stop rod is provided with a stop groove, the clutch bracket is provided with a stop protrusion corresponding to the stop groove, and the stop protrusion is positioned in the stop groove and pushes the stop rod to swing towards the direction abutting against the limiting surface.
The pneumatic counter provided by the technical scheme comprises a first pneumatic valve, a vent valve, a first connecting rod, a shifting fork and a gear set, wherein the gear set comprises an input gear and an output gear, and the input gear and the output gear can simultaneously rotate at a set rotation speed ratio; according to the invention, the first pneumatic valve is used as a counting valve, and when the cardiopulmonary resuscitation machine is pressed once, the first pneumatic valve stretches back and forth once, and the first pneumatic valve stretches back and forth to drive the shifting fork to swing back and forth around the rotating shaft (namely the eighth shaft 26) of the shifting fork; the first pneumatic valve stretches back and forth once, the shifting fork drives the input gear to rotate for a certain number of teeth, and the input gear drives the output gear to rotate simultaneously according to a set rotation speed ratio. Through be equipped with abrupt change structure on protruding outer circumference to connect the breather valve on the breather valve control breather valve opens and stops the breather valve switch, when the trigger end of breather valve switch arrived abrupt change structure, the breather valve opens, begins to ventilate, and in the invention, because the number of teeth of output gear is fixed, the initial position of the trigger end of breather valve switch is located abrupt change structure department, when cardiopulmonary resuscitation machine presses D times, output gear just rotates a week, the trigger end of breather valve switch gets back to abrupt change structure department, and at this moment, the breather valve opens, begins to ventilate, thereby has realized the count to cardiopulmonary resuscitation machine press number of times, promptly when cardiopulmonary resuscitation machine presses D times each time, opens the breather valve voluntarily, ventilates the person of being rescued. The invention adopts a mechanical counting mode to count the pressing times of the cardiopulmonary resuscitation machine, thereby improving the safety performance of the cardiopulmonary resuscitation machine.
Drawings
FIG. 1 is a schematic diagram of an internal structure of a pneumatic counter according to the present invention;
FIG. 2 is a schematic diagram of an internal structure of a pneumatic counter according to the present invention;
FIG. 3 is a schematic diagram of an internal structure of a pneumatic counter according to the present invention;
FIG. 4 is a schematic diagram of an internal structure of a pneumatic counter according to the present invention;
FIG. 5 is a schematic diagram of the external structure of a pneumatic counter according to the present invention;
FIG. 6 is a diagram showing the relationship between the stop lever and the stop surface when the second pneumatic valve is in the enabled condition;
fig. 7 is a diagram showing a positional relationship between the stopper rod and the stopper surface when the second air-operated valve is in the closed condition.
Wherein: 1. a first pneumatic valve; 2. a second pneumatic valve; 3. a first link; 4. a shifting fork; 5. a first gear; 6. an output gear; 7. enabling the gear; 8. a vent valve; 9. a spring; 10. a vent valve switch; 11. a seventh axis; 12. a clutch bracket; 13. a second link; 14. circular arc grooves; 15. a circular ring-shaped protrusion; 16. a roller; 17. a housing; 18. a limiting surface; 19. a third shaft; 20. a stop protrusion; 21. a stop groove; 22. a stop lever; 23. a sixth shaft; 24. a fifth shaft; 25. a first shaft; 26. an eighth shaft; 27. and a second gear.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
1-5 show a pneumatic counter provided by the invention, which comprises a first pneumatic valve 1, a vent valve 8, a first connecting rod 3, a shifting fork 4 and a gear set, wherein the gear set comprises an input gear and an output gear 6, and the input gear and the output gear 6 can simultaneously rotate at a set rotation speed ratio; the output end of the first pneumatic valve 1 is connected with the shifting fork 4 through the first connecting rod 3 and drives the shifting fork 4 to swing reciprocally around a shaft, and the shifting fork 4 is abutted on the input gear and toggles the input gear to set displacement rotation of the number of gear teeth through swing reciprocally around the shaft; the utility model discloses a breather valve, including output gear 6, breather valve 8, breather valve switch 10, be equipped with circular or ring-shaped protruding 15 on one side of output gear 6, protruding with output gear 6 sets up with one heart, be equipped with abrupt change structure on the bellied outer circumference, be connected with the control on the breather valve 8 breather valve switch 10 opens and stops, breather valve switch 10 including always with the triggering end of bellied outer circumference looks butt, works as the triggering end arrives abrupt change structure is time, breather valve 8 opens. According to the invention, the first pneumatic valve 1 is used as a counting valve, and each time the CPR is pressed, the first pneumatic valve 1 stretches back and forth once, and the first pneumatic valve 1 stretches back and forth to drive the shifting fork 4 to swing back and forth around the rotating shaft (namely the eighth shaft 26) of the shifting fork 4; the first pneumatic valve 1 stretches back and forth once, the shifting fork 4 drives the input gear to rotate for a certain number of teeth, and the input gear drives the output gear 6 to rotate simultaneously according to a set rotation speed ratio. Through be equipped with abrupt change structure on protruding outer circumference, and connect the breather valve 8 on the breather valve and control breather valve 8 opens and stops breather valve switch 10, when breather valve switch 10 trigger end arrives abrupt change structure, breather valve 8 opens, begins to ventilate, and in the invention, because the number of teeth of output gear 6 is fixed, the initial position of breather valve switch 10 trigger end is located abrupt change structure department, when the cardiopulmonary resuscitation machine presses D times, output gear 6 just rotates a week, breather valve switch 10 trigger end returns abrupt change structure department, and at this moment, breather valve 8 opens, begins to ventilate to realize the count to the cardiopulmonary resuscitation machine presses the number of times, namely when the cardiopulmonary resuscitation machine presses D times each time, opens breather valve 8 voluntarily, ventilates the person of being rescued. The invention adopts a mechanical counting mode to count the pressing times of the cardiopulmonary resuscitation machine, thereby improving the safety performance of the cardiopulmonary resuscitation machine.
Further, as shown in fig. 2, the pneumatic counter further comprises a second pneumatic valve 2, a second connecting rod 13 and a clutch bracket 12, the gear set further comprises an enabling gear 7, and the enabling gear 7 can be meshed with the input gear and the output gear 6 at the same time; the output end of the second pneumatic valve 2 is connected with one end of the clutch bracket 12 through the second connecting rod 13 and drives the clutch bracket 12 to swing reciprocally around the shaft, the enabling gear 7 is mounted on the clutch bracket 12, and the enabling gear 7 is meshed with or separated from the input gear and the output gear 6 simultaneously through the reciprocal swing around the shaft of the clutch bracket 12. When the second pneumatic valve 2 is in an enabling working condition, the second pneumatic valve 2 is opened, the second connecting rod 13 is pushed outwards, the clutch bracket 12 is driven by the second connecting rod 13 to rotate around the rotating shaft (namely, the seventh shaft 11) of the clutch bracket 12, wherein the seventh shaft 11 is arranged on the inner wall of the shell 17, so that the enabling gear 7 rotates around the seventh shaft 11 along with the clutch bracket 12 to be meshed with the input gear and the output gear 6 at the same time, and the process is preparation work before counting. When cardiopulmonary resuscitation is finished, the second pneumatic valve 2 is closed, the second connecting rod 13 is retracted, and the clutch bracket 12 is driven by the second connecting rod 13 to rotate around the seventh shaft 11, so that the enabling gear 7 rotates around the seventh shaft 11 along with the clutch bracket 12 to be separated from the input gear and the output gear 6.
Further, as shown in fig. 2, the input gear includes a first gear 5 and a second gear 27 that rotate coaxially and synchronously, the shift fork 4 is connected with the first gear 5 through the second gear 27 and drives the first gear 5 to rotate, and the enabling gear 7 can be meshed with the first gear 5 and the output gear 6 at the same time, wherein a top circle of the first gear 5 is inscribed with a top circle of the output gear 6. In this embodiment, the first shaft 25 is fixedly connected to the shaft center of the first gear 5, the extending end of the first shaft 25 is fixedly connected to the second gear 27, and the second gear 27 is concentrically disposed with the first gear 5 and drives the first gear 5 to rotate through the first shaft 25. As shown in fig. 1 and 2, the fork 4 is provided with teeth, and the teeth mesh with the second gear 27 and drive the second gear 27 to rotate, so that the second gear 27 drives the first gear 5 to rotate through the first shaft 25. The number of teeth of the output gear 6 is 60, the ratio of the number of teeth of the first gear 5 to the number of teeth of the second gear 27 is 2:1, and the shifting fork 4 drives the second gear 27 to rotate by displacement of one gear tooth at a time through reciprocating swinging around a shaft. When the cardiopulmonary resuscitator is pressed once, the shifting fork 4 swings back and forth once to drive the second gear 27 to rotate by one tooth, and as the gear ratio of the first gear 5 to the second gear 27 is 2:1, the first gear 5 is driven to rotate by 2 teeth, and the enabling gear 7 is meshed with the first gear 5 and the output gear 6 at the same time, the output gear 6 rotates by 2 teeth along with the enabling gear, and as the gear number of the output gear 6 is 60, the ventilation valve 8 can be opened and ventilated for a rescuee when the cardiopulmonary resuscitator is pressed 30 times. Cardiopulmonary resuscitation is a strict requirement on the rhythm of chest compressions, and every 30 compressions require ventilation of the rescuee once (compression interruption during ventilation), the interruption time is less than 5 seconds, and in this embodiment, the duration of each ventilation is 2 seconds.
Further, the abrupt change structure is a circular arc groove 14 or a circular arc protrusion disposed on the outer circumference of the protrusion, as shown in fig. 3, in this embodiment, the abrupt change structure is a circular arc groove 14 disposed on the outer circumference of the protrusion, a roller 16 is disposed on the trigger end, the trigger end is always abutted to the outer circumference of the protrusion through the roller 16 and can roll on the outer circumference of the protrusion, and the trigger end of the vent valve switch 10 slides on the outer circumference of the circular ring protrusion 15 more smoothly through the roller 16. In this embodiment, when the roller 16 of the vent valve switch 10 rolls to the circular arc-shaped groove 14, the vent valve switch 10 swings to a certain extent, so that the vent valve 8 is opened, and ventilation is started.
Further, as shown in fig. 3, the pneumatic counter further includes a housing 17, a spring 9 is disposed between the vent valve switch 10 and the vent valve 8, the spring 9 is fixed to the housing 17 at one end of the spring 9, and the other end of the spring 9 abuts against the vent valve switch 10, so that the triggering end of the vent valve switch 10 always abuts against the outer circumference of the protrusion.
Further, as shown in fig. 4, the pneumatic counter further includes a stop mechanism, where the stop mechanism includes a stop lever 22 and an eccentrically disposed limiting surface 18 disposed on a side surface of the output gear 6, one end of the stop lever 22 is connected to the clutch bracket 12, and the clutch bracket 12 drives the stop lever 22 to swing reciprocally around a shaft so that the other end of the stop lever 22 abuts against or is separated from the limiting surface 18. The stop rod 22 is provided with a stop groove 21, the clutch bracket is provided with a stop protrusion 20 corresponding to the stop groove 21, and the stop protrusion 20 is positioned in the stop groove 21 and pushes the stop rod 22 to swing towards the direction abutting against the limiting surface 18. In this embodiment, a fifth shaft 24 is provided on the inner wall of the housing 17, and one end of the stopper rod 22 is rotatably connected to the fifth shaft 24. The stop lever 22 is provided with a stop groove 21, the clutch bracket 12 is provided with a stop protrusion 20 opposite to the stop groove 21, and the stop protrusion 20 is contacted with the groove wall of the stop groove 21 and can drive the stop lever 22 to swing. In this embodiment, by providing the stop lever 22, when cardiopulmonary resuscitation is finished, the gear 7 rotates along with the clutch support 12 around the seventh shaft 11 to disengage from the first gear 5 and the output gear 6, and the stop protrusion 20 provided on the clutch support 12 rotates along with the clutch support 12, and the stop protrusion 20 drives the stop lever 22 to rotate until contacting with the outer surface of the limiting surface 18 and propping against the outer surface of the limiting surface 18, thereby effectively preventing the output gear 6 from freely rotating; when the second pneumatic valve 2 is in the enabling working condition, the second pneumatic valve 2 is opened, the second connecting rod 13 is pushed out outwards, the clutch bracket 12 is driven by the second connecting rod 13 to rotate around the seventh shaft 11, the stop protrusion 20 rotates along with the clutch bracket 12, and the stop protrusion 20 drives the stop rod 22 to rotate to be separated from the outer surface of the limiting surface 18, so that the output gear 6 can rotate along with the enabling gear 7 when the ventilation device works. Further, as shown in fig. 4, a sixth shaft 23 is disposed on the inner wall of the housing 17, and the vent valve switch is rotatably connected with the sixth shaft 23, where the sixth shaft 23 is a rotation shaft of the vent valve switch, and the stop lever 22 is disposed between the extending end of the sixth shaft 23 and the extending end of the third shaft 19 and can swing back and forth within a range between the extending end of the sixth shaft 23 and the extending end of the third shaft 19, thereby limiting a working range of the stop lever 22, and effectively avoiding that the swing amplitude of the stop lever 22 is too large and affects normal working of other parts when the vent device works. FIG. 6 is a diagram showing the positional relationship between the stop lever 22 and the stop surface 18 when the second air operated valve 2 is in the enabled condition; fig. 7 shows the position relationship between the stop lever 22 and the stop surface 18 when the second air-operated valve 2 is in the closed condition.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (6)
1. The pneumatic counter is characterized by comprising a first pneumatic valve, a vent valve, a first connecting rod, a shifting fork and a gear set, wherein the gear set comprises an input gear and an output gear, and the input gear and the output gear can simultaneously rotate at a set rotation speed ratio;
the output end of the first pneumatic valve is connected with the shifting fork through the first connecting rod and drives the shifting fork to swing reciprocally around the shaft, and the shifting fork is abutted on the input gear and toggles the input gear to set the displacement rotation of the number of gear teeth through the reciprocal swing around the shaft;
a circular or annular bulge is arranged on one side surface of the output gear, the bulge and the output gear are concentrically arranged, a mutation structure is arranged on the outer circumference of the bulge, a vent valve switch for controlling the vent valve to start and stop is connected to the vent valve, the vent valve switch comprises a trigger end always abutted to the outer circumference of the bulge, and when the trigger end reaches the mutation structure, the vent valve is opened;
the pneumatic counter further comprises a second pneumatic valve, a second connecting rod and a clutch bracket, the gear set further comprises an enabling gear, and the enabling gear can be meshed with the input gear and the output gear at the same time;
the output end of the second pneumatic valve is connected with one end of the clutch bracket through the second connecting rod and drives the clutch bracket to swing around the shaft in a reciprocating manner, the enabling gear is arranged on the clutch bracket, and the enabling gear is meshed with or separated from the input gear and the output gear simultaneously through the clutch bracket to swing around the shaft in a reciprocating manner;
the input gear comprises a first gear and a second gear which are coaxial and synchronously rotate, the shifting fork is connected with the first gear through the second gear and drives the first gear to rotate, and the enabling gear can be meshed with the first gear and the output gear at the same time;
the shifting fork is provided with convex teeth which are meshed with the second gear and drive the second gear to rotate;
the addendum circle of the first gear is inscribed with the addendum circle of the output gear.
2. A pneumatic counter as claimed in claim 1 wherein the ratio of the first gear to the second gear is 2:1 and the fork rotates by one tooth displacement at a time by oscillating reciprocally about the shaft to toggle the second gear.
3. A pneumatic counter according to any one of claims 1-2, wherein the abrupt change is an arcuate groove or an arcuate protrusion provided on the outer circumference of the protrusion.
4. A pneumatic counter as claimed in any one of claims 1 to 2, comprising a housing, a spring being provided between the vent valve switch and the vent valve, one end of the spring being secured to the housing, the other end of the spring being in abutment with the vent valve switch such that the trigger end of the vent valve switch is always in abutment with the outer circumference of the boss.
5. A pneumatic counter as claimed in any one of claims 1 to 2 further comprising a stop mechanism comprising a stop lever and an eccentrically disposed stop surface provided on a side of the output gear, one end of the stop lever being engaged with the clutch support, the stop lever being driven by the clutch support to oscillate reciprocally about an axis so that the other end of the stop lever abuts against or is separated from the stop surface.
6. A pneumatic counter according to claim 5, wherein the stop lever is provided with a stop groove, the clutch bracket is provided with a stop protrusion corresponding to the stop groove, and the stop protrusion is positioned in the stop groove and pushes the stop lever to swing in a direction abutting against the limit surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711410747.4A CN107997949B (en) | 2017-12-23 | 2017-12-23 | Pneumatic counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711410747.4A CN107997949B (en) | 2017-12-23 | 2017-12-23 | Pneumatic counter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107997949A CN107997949A (en) | 2018-05-08 |
| CN107997949B true CN107997949B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711410747.4A Active CN107997949B (en) | 2017-12-23 | 2017-12-23 | Pneumatic counter |
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| Country | Link |
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| CN (1) | CN107997949B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB813738A (en) * | 1956-12-19 | 1959-05-21 | Paliz Holding Ag | Stroke counter |
| CN2679648Y (en) * | 2004-01-13 | 2005-02-16 | 宁波市大名智能仪表有限公司 | Mechanically prechanging gas meter |
| CN105213166A (en) * | 2015-09-08 | 2016-01-06 | 张志鹏 | Cardio-pulmonary resuscitation outer chest heart pressing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2364649A (en) * | 2000-05-17 | 2002-02-06 | Orion Corp | Inhaler with Dose Counter |
| KR100706701B1 (en) * | 2006-04-25 | 2007-04-13 | 휴메드 주식회사 | Cardiopulmonary resuscitation apparatus |
-
2017
- 2017-12-23 CN CN201711410747.4A patent/CN107997949B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB813738A (en) * | 1956-12-19 | 1959-05-21 | Paliz Holding Ag | Stroke counter |
| CN2679648Y (en) * | 2004-01-13 | 2005-02-16 | 宁波市大名智能仪表有限公司 | Mechanically prechanging gas meter |
| CN105213166A (en) * | 2015-09-08 | 2016-01-06 | 张志鹏 | Cardio-pulmonary resuscitation outer chest heart pressing device |
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| Publication number | Publication date |
|---|---|
| CN107997949A (en) | 2018-05-08 |
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