WO2016012509A1

WO2016012509A1 - Medical device having a rotatable actuator for the actuation of a valve or of a clamp

Info

Publication number: WO2016012509A1
Application number: PCT/EP2015/066782
Authority: WO
Inventors: Stephan Gössmann; Ralf MÜLLER
Original assignee: Fresenius Medical Care Deutschland Gmbh
Priority date: 2014-07-23
Filing date: 2015-07-22
Publication date: 2016-01-28
Also published as: DE102014110373A1

Abstract

The present invention relates to a medical device (100), having a receiving device (101) for at least one actuator (200) or plunger; at least one actuator (200) which is received at least in sections by the receiving device (101) and which is arranged such that it can be moved between at least one first and one second actuator position; at least one activation device (207, 113) which is arranged so as to mechanically move the actuator (200) from the first actuator position into the second actuator position; wherein the activation device (207, 113) has at least one energy storage device (207) which is connected to the actuator (200).

Description

Besehreibung

Medical device with a rotary actuator for

Actuation of a valve or a clamp

The present invention relates to a medical or laboratory device having the features of claim 1.

Medical or laboratory devices such as those described in WO 2010/121819 AI have mechanical elements which are movable between at least two positions. If the elements are moved, they may be used within the device, depending on their arrangement, to form another component of the device or any device connected thereto, such as a blood tubing set, cassette system or blood cassette (also referred to as

Cassette Disposable or referred to as a disposable cassette) to operate mechanically. Such other components can, for. B. valves or hose clamps, which contribute

for example, the flow of liquids and gases,

especially medical fluids and blood, through

Lines, channels and chambers of the blood cassette or

to control other facilities. Such mechanical elements are referred to below as actuators. If they are used to actuate a valve, they are referred to as valve tappets.

A blood cassette as described herein is, for example, a hard part with fluid-carrying structures and a foil. The film closes after being pressed, glued or welded to the hard part half-open

Hard part channels and chambers liquid-tight. The foil allows in addition to the Verschlussfunktιοη due to their

Yield and thin wall thickness also measuring

Parameters such as temperatures and pressures as well as the actuation of valves through the film.

From o. G. WO 2010/121819 AI valves are known which

can be pneumatically opened and closed, by applying negative pressure or pressure to an actuator, which in turn acts on a film section over the hard part. Also known are actuators, which are acted upon by means of magnet (lifting or rotary magnet), in order to thereby hold, for example, a valve in the open position.

The object of the invention is to propose a further medical or laboratory device with an actuator for actuating a valve or another component.

The object can be achieved by a medical or laboratory device with the features of

Claim 1.

According to the invention thus a medical or

Laboratory device with a receiving device for receiving at least one mechanically actuable and / or mechanically active actuator, which may optionally be a plunger or valve tappet proposed. The device further comprises at least one actuator, which may optionally be a plunger or valve lifter, which, at least

is partially received by the receiving device or slidable in this, and which is arranged to relative to the receiving device between at least a first and a second Aktorstellung be transferred.

Furthermore, the medical device

at least one activation device. The

Activation device or another section of the

Device according to the invention has at least one

Energy storage device on. The

Energy storage device, which is configured, for example, to store mechanical energy, is in communication with the actuator or contact and / or keeps this at least in the first actuator position under tension or bias. The energy storage device is preferably arranged to bring the actuator mechanically from the first actuator position to a second actuator position (or to hold in the latter). The energy storage device stores in the first one

Actuator position of the actuator preferably a first degree

Energy and in the second actuator position preferably a second level of energy. The second dimension is preferably smaller than the first dimension.

The actuator is in the sense of some exemplary

Embodiments of the present invention are "activated" when in the second actuator position, in which it closes a valve, for example, and / or protrudes from the receptacle with its front portion. The first actuator position is distinguished from the second actuator position For example, in order to remain in the picture, the actuator does not close the valve and / or not with its front portion from the receiving device protrudes (or protrudes less than in the second

Actuator position), wherein the present invention in no way on the actuation of valves, and even less on the

Actuation of valves which are part of a blood cassette described herein is limited. Also the provision of the

Actuator for actuating a component other than a valve or a blood cartridge valve is of the present

Invention. To such other components can

Hose clamps include, for example, an arterial

and / or a venous hose clamp, by means of which the flow through the arterial line section or the venous

Line section, in particular as described herein, can be prevented. Notwithstanding the above explanation, the present invention will now be described in more detail with reference to a valve and in particular with respect to a valve of a blood cassette. However, since the present invention is not intended to be limited thereto, the comments made with respect to valves herein always apply, even if the person skilled in the art does not recognize a technical contradiction, also for other components which are actuated by means of an actuator.

As the transition from the first actuator position to the second actuator position is herein also preferably referred to as "activation of the actuator", the transition from the second actuator position to the first actuator position herein is preferably referred to as "deactivating the actuator".

For all subsequent versions, the use of the

Expression "may be" or "may have", etc. synonymous with "is preferably" or "preferably has", etc., and is intended to explain an embodiment of the invention. Whenever numerical words are mentioned herein, those skilled in the art will understand these as indicating a numerically lower limit. If this does not result in a contradiction that is recognizable to the person skilled in the art, the person skilled in the art therefore always reads "at least one" or "at least one", for example, when specifying "a" or "one". This understanding is also included in the present invention such as the interpretation that a numerical word such as "a" may alternatively be meant to mean "exactly one" wherever technically possible for those skilled in the art. Both are encompassed by the present invention and apply to all number words used herein.

Advantageous further developments of the present invention are the subject matter of subclaims and

Embodiments.

Embodiments of the invention may include one or more of the features mentioned above and / or below

have any combination.

In certain inventive, exemplary

Embodiments may be the first and the second

Aktorstellung each be an end position of the actuator, which together limit the maximum longitudinal displacement of the actuator.

In some exemplary embodiments of the invention, the first and second actuator positions are "valve open" and "valve closed", respectively.

Alternatively, the first and the second actuator position are a "clamp open" position or a "clamp closed" position. The clamp can be a hose clamp. In certain inventive, exemplary

Embodiments, the activation device, the

Energy storage device and purely optionally also an electric motor (possibly with clutch) on or consists of it.

In some exemplary embodiments of the invention, the activation device is not configured and / or arranged to act pneumatically, inductively or magnetically on the actuator.

In some exemplary embodiments according to the invention, the activated or second actuator position is that position in which the actuator acts as intended, for example by closing a valve and / or in that its front section protrudes further from the receiving device than in the first actuator position.

In certain inventive, exemplary

Embodiments, the energy storage device is not part of the deactivation device and / or not arranged to be able to act deactivating.

In some exemplary embodiments of the invention, the activation device and the

Deactivation device different components or component groups. An exception to this is in some

embodiments of the optional

Electric motor, the optional part of both the

Activation device as well as the deactivation device can be. In some exemplary embodiments of the invention, the actuator is not disposed on or in contact with a cam shaft or cam shaft, such as by a cam or cam.

In some exemplary embodiments of the device according to the invention, the receiving device is an actuator plate.

In some exemplary embodiments of the device according to the invention, the actuator is preferably arranged not to protrude from a plane or surface of the receptacle in the first actuator position or to protrude less from the receptacle than in the second actuator position

Actuator division.

In certain inventive, exemplary

Embodiments of the device is the

Energy storage device, a spring element, for

Compression spring, for example, a coil spring.

In certain inventive, exemplary

Embodiments of the device, the actuator is arranged to be transferred by means of the energy storage device, and preferably exclusively or at least in phases exclusively by means of the energy storage device, from the first to the second Aktorstellung.

In some exemplary embodiments of the invention, the device includes or is connected to a blood cassette, wherein the blood cassette has at least one valve portion of a valve and the valve has a closed valve position and an open Vent ilstellung can take.

In certain inventive, exemplary

Embodiments, the device has a blood tube set or is connected thereto, wherein the blood tubing set has at least one hose clamp portion and the hose clamp can assume a closed clamping position and an open clamping position.

In some exemplary embodiments of the device according to the invention, the actuator, which may be a valve actuator or plunger, is arranged to apply pressure to the valve portion of the valve in use of the device in the second actuator position, but preferably not in the first actuator position

Apply valve so that the valve in the

closed valve position transferred or held in the closed valve position. Alternatively, the actuator may be a hose clamp actuator which transfers the hose clamp (or clamp generally) to the closed hose clamp position or holds it closed in the hose clamp position.

In certain inventive, exemplary

Embodiments of the device support the

Energy storage device ab at a first abutment or area, which is part or paragraph of the actuator, and at a second abutment or area, which is part of

Cradle or another section of the

Device is. In certain inventive, exemplary

Embodiments, the device or

Recording device on a holding mechanism, by means of which the actuator against the return action of the

Energy storage device in the first actuator position

is held. This means that upon release of the locking mechanism caused by the locking mechanism or by releasing the holding mechanism caused by the holding mechanism

Energy storage device transferred the actuator in the second position, preferably without further action or more

Supply of energy, which is not from the

Energy storage device comes. The retention mechanism may optionally be a slope or depression of a first portion of a curve portion.

In some embodiments of the device according to the invention, the actuator is rotatable about its longitudinal axis and at the same time displaceable along the longitudinal axis in the

Cradle or another section of the

Device, at least partially, added.

In this case, the receiving device or the other portion of the device in certain inventive,

at least one exemplary embodiment

Curve section, and the actuator has at least one

Guide element, for. B. projection, wheel with bearings, rollers, or pins, each radially projecting on. The guide member is guided along the curve portion along the longitudinal axis in rotation of the actuator in contact with the curved portion along or slides along it. The contact can do this

optionally achieved and / or maintained by the energy storage device. In some exemplary embodiments of the invention, the cam portion is a link, a cam, or a cam.

In some exemplary embodiments of the invention, the curve portion is a path or projection

unchangeable radius or constant curvature.

In certain inventive, exemplary

Embodiments of the curve portion of the rotation of the actuator, initiates this, allows this and / or causes this together with the energy storage device and / or optionally by means of the guide element.

In some example embodiments of the invention, the cam portion serves to displace the actuator in the longitudinal direction thereof or, when the actuator is rotated in contact with the cam portion about its longitudinal axis, allows or causes such movement.

In certain inventive, exemplary

Embodiments is the curve section part of

Lateral surface or end face of the receiving device or of the other section of the device, for example one

Housing section.

In some exemplary embodiments of the invention, the cam portion is on or part of an outer peripheral surface of the actuator or a portion of the peripheral surface. In some exemplary embodiments according to the invention, the actuator, at least in the region of the curve section, is circular or tubular in cross section or has a round cross section.

In certain inventive, exemplary

According to embodiments of the device, the curve section has at least one first section which, when in

Contact and / or interaction with the guide element of the actuator, the actuator against the effect of

Energy storage device holds in the first actuator position. The first section may serve as a holding mechanism or be part of it.

In certain inventive, exemplary

Embodiments, the first section of the

Curve section on a counter-slope or a depression and / or causes a wedge effect, a self-locking and / or a stable end position of the guide element in or on the first section. Under a counter slope is in this

Context a slope understood which the slope of a second or third section, see below,

for example, with respect to the longitudinal axis of the actuator or the displacement, is directed opposite. For further explanation, reference is also made to Fig. 3a.

In some exemplary embodiments according to the invention, the curved section, in cooperation with the guide element of the actuator, prevents or limits longitudinal displacement of the actuator relative to the receiving device in at least one direction along the longitudinal axis of the actuator. this applies in particular, as long as the actuator does not turn or on

Turning is prevented.

In some exemplary embodiments of the device according to the invention, the curve section has at least one third section, which does not have any slope, no

Counter slope and / or no positive slope of the

Curve section related to the transverse axis or the

Cross section of the actuator or its unwound

Having circumferential direction.

In certain inventive, exemplary

According to embodiments of the device, the curve section has at least one third section which, when in

Contact and / or interaction with the guide element of the actuator, the same, supported by the action of the

Energy storage device, holds in the second Aktorstellung.

In some exemplary embodiments of the device according to the invention, the curve section has at least one second section, which is provided between the first and third sections and has a pitch not equal to 0 ° with respect to both the longitudinal axis and the transverse axis of the actuator.

According to the invention, the first, second and / or third section can be understood in accordance with the invention as a first, second or third surface of the curve section, for example in each case that surface or surface which, when activated or

Deactivation of the actuator, ie when turning around its

Longitudinal axis, is in contact with the guide element. According to the invention, it is possible for the curve section to have any desired combination of first, second and / or third section. Thus, regardless of the designation of the individual sections, the curve section may also have only the first and second or the first and third sections, for example.

In some exemplary embodiments of the invention, the device is a blood treatment device or

Dialysis device, hemodialysis device,

Filtration device, Diafiltration device,

Hemodialfiltrationsvorrichtung or the like designed.

In certain inventive, exemplary

Embodiments is the device with a

Deactivation device for transferring the actuator from the second actuator position in the first Aktorstellung and / or equipped to rotate the actuator by at least a few degrees of its longitudinal axis. It can the

Deactivation device have an electric drive or be an electric drive or electric motor. The electric motor can thus according to the invention be used both as part of the activation device and as a deactivation device.

In certain inventive, exemplary

Embodiments is the device with a

Capacitor circuit or a voltage storage device equipped. This is for holding the of the

Activation device for transferring the actuator from the second Aktorstellung in the first actuator position or to effect this transition required electricity provided.

In some exemplary embodiments of the invention, the blood cassette has a hard body and a

Hard body or parts of this covering film on. The valve seat is provided in the hard body. The valve is arranged to be closed by means of pressure or displacement of an actuator of the device on the film in the second

Valve position to be transferred.

In an exemplary embodiment of the invention, an electric motor opens a valve actuated by the actuator by rotating the actuator about its own axis. This z. B. via two ball bearings (or plain bearings or the like) and a curve section (eg., A cam), the introduced by means of electric motor rotation in an axial movement of the actuator, here exemplarily a valve lifter implemented. The energy storage device,

For example, a coil spring, charged with energy, such as by tensioning the coil spring. Here, the curve section is formed as a cam so that the actuator from the first actuator position, which may be an end position or end position, can not turn back by itself. This can be achieved by the first section of the

Curve section is a platform (with a course that is in a projection perpendicular to the longitudinal axis of the actuator and or parallel to the transverse axis of the actuator) or a

Counter slope (ie a slope opposite to that of the second section) has. But according to the invention it is also possible that the first

Section of the curve section one, preferably very

low slope. The actuator can be kept under a low torque of the electric motor and correspondingly low energy consumption in the first Aktorstellung.

To move the actuator from the first actor position to the second

To transfer actor position and close, for example, a valve (or the clamp or hose clamp or the other component) is only a short voltage pulse necessary in a counter-slope or platform in the first section, since it is sufficient to move the system out of the stable end position , The remaining energy for the return movement to the second actuator position, in which the valve is closed, is from the energy storage device, about one

Return spring, provided. Thus, the actuator in the two valve positions (open and closed) without voltage or almost free of tension, as far as electrical voltage is meant.

To the valve (or the clamp or hose clamp or the other component) at the pitch or platform even in a power failure in the closed valve position

(Safe state) to bring, in addition, a capacitor can be charged and connected in reverse polarity via a transistor to the motor. In this exemplary embodiment, when the voltage of the system drops, the transistor connects the capacitor to the

Electric motor. This moves the actuator from the first

Actuator position out, and the valve closes

self-employed. Embodiments of the invention may have one or more of the advantages mentioned herein, including the following.

Thus, in certain embodiments by means of

Device according to the invention - measured on o. g. State of the art - energy can be saved. Because unlike the o. G. magnetically open valves,

In any event, after a deactivation of the actuator, hose clamps or the like do not require any energy in order to hold the actuator in the present position (and, for example, the valve or the hose clamp in the open position). Also, the activation of the actuator, so be

Conversion to the second position, according to the invention does not always require externally supplied energy. For this purpose, the means of energy storage device, for. As a spring, stored energy sufficient. Even an initial one

Applying electrical energy when activating the actuator by means of an electric motor, for example for releasing the

Guide element from the recess or the platform of the first portion of the curve section before the

Energy storage device the real work of

Activation takes only low power consumption. In particular, however, no permanent application of electrical energy is required for this purpose. Of particular advantage here is that no or almost no energy in the two positions of the actuator and / or valve is consumed (ie in particular to maintain the respective position of the

Aktors), and that the energy consumption during the switching operation of the actuator and / or when opening or closing the valve

is significantly reduced compared to the prior art. Furthermore, in some embodiments, by means of

Device according to the invention - measured on o. g. State of the art - components, and in particular complex or expensive components to be monitored are saved. That's the way it is

According to the invention, not necessary for a pneumatic

operated valve or Schlauchklemmenaktor always

required, sufficient pressure and vacuum supply vorzufhalten, which can be cost and maintenance intensive.

By dispensing, for example, pneumatic components, which is advantageously possible according to the invention, the actuation of the actuators can advantageously be much quieter than is known from the prior art. This increases the comfort for staff and patient when using the device.

Another important advantage is that a

Independent closing, for example, a valve or a hose clamp or the like by means of the actuator is reliably possible even during power failure. This serves to increase the safety of the procedure itself and / or for the patient.

The provision of a curve section is also advantageous, since by means of the curve section, which optionally as

Cam can be configured, or by means of

Cam, in a simple, energy-saving way

Rotational movement at bias can be generated by, for example, a spring in longitudinal displacement. By providing certain slopes of the cam portion to achieve, for example, different states of the valve, hose clamp or the like (open, closed, neither), it is easily possible to do so Ratio and thus possibly also the

To adjust energy consumption.

The present invention will be described below by way of example with reference to the accompanying drawings, in which identical reference characters denote the same or similar components. In the partially simplified figures:

Fig. 1 shows a section of a

Device according to the invention with an actuator in a first exemplary embodiment according to the invention; schematically shows a simplified

Device according to the invention in a second, exemplary embodiment

Fig. 3 shows a simplified schematic one

developed curve section of the

Device in an exemplary

Embodiment of the present invention

Invention;

Fig. 3a shows a simplified representation of

Pitch ratios of Fig. 3; and

FIG. 4 shows an inventive exemplary electrical circuit for a

Electric motor for rotating the actuator of the device about its longitudinal axis. 1 shows a detail of a device 100 according to the invention with an actuator or plunger 200 in a first exemplary embodiment according to the invention, which relates purely by way of example to a valve.

Actuator 200 has a longitudinal axis L and is along this by a portion of a receiving device 101 of

Device 100 inserted through. Both the portion and the actuator 200 have a round cross section in the embodiment shown here.

At its lower end 201 (also referred to herein as the front portion) in Fig. 1, the actuator 200 is configured to act as a valve lifter on a valve portion 301 of a valve 303 of a blood cassette 300 by applying pressure. The valve portion 301 is part of a web 305 of a

Hard part of the blood cassette 300. Above the bridge 305 is a flexible film 307 of the blood cassette, which over wide

Stretch, but not in the area of the valve 303 with the

Bridge 305 is firmly connected.

The actuator 200 has a first abutment 203 as a stop for an energy storage device 207 embodied here purely by way of example as a spring element. The

Energy storage device 207 may in this embodiment alone or, optionally, together with one below

described electric drive 113 as

Activation device to be understood, because by means of the energy storage device 207 and possibly initially supported by the electric drive 113, the actuator 200th

activated, ie from the first shown in FIG Actuator position transferred to the second actuator position and thus activated.

The actuator 200 has a second abutment 103 which, like the first abutment 203 as a stop for the

Spring element is used. The spring element is thus in the first Aktorstellung shown in Fig. 1 between the first

Abutment 203 and the second abutment 103 biased. The spring element is due to its arrangement and bias strives to move the actuator 200 in a downward direction (relative to FIG. 1) in the direction of valve section 301, so to activate.

The receiving device 101 has at least one

Curve section 105, which in turn a first

Section 105a, a second portion 105b and a third portion 105c has.

The actuator 200 is in an inner region - or alternatively another area - of the receiving device 101 and rotatably mounted relative to the latter in the latter or

arranged.

The actuator 200 has a guide element 209, which is configured purely by way of example here as an impeller 209a or has this in turn.

In Fig. 1, the actuator 200 is shown in the first actuator position in which it does not close the valve 303, which is why the valve 303 is shown in Fig. 1 in the open valve position. In the open valve position, fluid can flow between the web 305 of the hard part of the blood cassette 300, which in the Area of the valve 303 to the film 307 spaced at a distance and thus not firmly with the film 307

on the one hand and the film 307, on the other hand, flow in or out of the drawing plane in one direction.

At its upper end, the actuator 200 is shown cut. This end may be connected to a coupling, via which a torque can be introduced into the actuator 200. Applied torque may rotate the actuator 200 such that the impeller 209a extends along the first

Section 105a moves until it reaches the second section 105b. When the impeller 209a reaches the second portion 105b, the impeller 209a driven by the relaxing spring member can slide over the second portion 105b until it reaches the third portion 105c. If it has reached the third section 105c, then the actuator 200 has moved sufficiently far in the longitudinal direction, by pressing on the film 307, this up to the web 305 in the region of the valve portion 301, which also as

Ventilgrund or valve seat can be referred to, too

to press. The valve 303 is thus closed or assumes the closed valve position (not shown), as is easy for the skilled person with reference to FIG. 1.

Since the first portion 105a of the cam portion 105 plays a role in the biasing of the spring member in that it contributes or insures that the bias voltage is maintained until the moment of use of the electric motor to rotate the spring member

Actuator 200 is maintained about the axis, it can be understood as a third abutment. As can be seen Fig. 1, is in the special

Embodiment of FIG. 1 in addition to the curve section 105, another curve section 105 'is arranged. The further curve section 105 'also has at least one

(further) first section 105a ', and / or a second

Section (not shown) and / or a third section (also not shown) on. Likewise, the actuator 200 in addition to the impeller 209a on another impeller 209a ', which in Fig. 1 in contact with the other first

Section 105a 'is shown. The provision of more than one

Curve section 105, 105 'and more than one impeller 209a, 209a' can lead to a low-stress guidance, displacement and rotation of the actuator 200 in the receiving device 101

contribute. The number of curve sections and / or

Guide elements is not limited to two.

The transverse axis Q of the actuator 200 is indicated.

FIG. 2 schematically shows in simplified form a device 100 according to the invention in a second exemplary embodiment

Embodiment.

The actuator 200 is accommodated within a receiving device 101, here by way of example an actuator plate of the device 100, and is held under tension by the energy storage device 207, here once again a spiral spring.

Fig. 2 shows the actuator 200 again in the first

Actuator position in which he does not act on the film 307 and thus not on the valve 303. The upper end (spatial information is always to be understood here with reference to the figures) is connected via a coupling 111, here optionally with height compensation, with an electric motor 113. The electric motor 113 serves to rotate the

Actuator 200 about its own longitudinal axis L to tension it against the spring force of the energy storage device 207 and thus disable.

In the example of Fig. 2 form the

Energy storage device 207 and the electric motor 113 together the activation device for activating the actuator 200, that is for transferring and optionally under tension holding the actuator 200 in the second ("activated")

Actuator division.

The curve portion 105 of FIG. 2 abuts or is part of the lower portion of the receptacle 101. The known from Fig. 1, but not shown in Fig. 2

Guide element 209 is part of one example here

Cylindrically shown portion 211, which is rotated together with the rest of the actuator 200. The section 211 serves as the first abutment 203 in this exemplary embodiment of the invention. In comparison between FIGS. 1 and 2, it can be seen that the energy storage device 207 in FIG. 1 is located below the receiving device 101, in FIG. 2 between two sections , which both of the receiving device 101

be attributed.

In comparison between FIGS. 1 and 2, it can also be clearly seen that the curve section 105, which is shown in FIGS always shown as part of the pickup 101, could just as well be part of the actuator 200. The guide member 209 could in this case on the receiving device 101st

be provided, for example in the sense of a kinematic reversal.

Fig. 3 shows schematically simplified a developed

Curve section 105 in an exemplary embodiment of the present invention, as for example in

Actuator 200 of FIG. 1 is used.

The curve portion 105 has the first portion 105a, the second portion 105b, and the third portion 105c, as already discussed with reference to FIG.

The guide element 209 lies once on the first portion 105a, which corresponds to its position in the first actuator position, and once on the third portion 105c, which corresponds to its position in the second Aktorstellung.

In the example of FIG. 3, the third section 105 c has no slope relative to the horizontal or to the

Transverse direction of the actuator 200 or its wound

Circumferential direction, the guide member 209 lies against a purely optional vertically drawn stop. The actuator 200 can not continue due to the stop by means of the energy storage device 207, not shown

be activated or moved. The second section 105b has a first slope.

Due to the slope and the fact that the

Curve section 105 in its actual arrangement order At least a portion of the circumference of the actuator 200 nestles, the second portion 105 b taken alone may also be referred to as a cam. The first slope is referred to herein as a positive, decreasing, or decreasing slope, it represents for the

Guide member 209 when activating a sloping

Guide, which is shown in the illustration of Fig. 3 as an angle relative to the horizontal counterclockwise, see the simplified view in Fig. 3a, in which the longitudinal direction L and the transverse axis Q (can also as

wound circumferential direction of the actuator 200 are understood) of the actuator 200 are shown for better orientation. The first portion 105a has a second pitch, referred to herein as a negative pitch, for the guide member 209 is a sloping guide, which in the illustration of FIG

Horizontal is shown in a clockwise direction, see for the

Angle the simplified representation in Fig. 3a. The second

Slope represents an increasing slope for the guide member 209 upon activation. The first slope and the second slope are referred to herein as opposing slopes with respect to FIG. 3a relative to each other.

Upon activation of the actuator 200, that is to say when it is transferred from the first actuator position into the second position, the guide element 209 is moved from its position in the first section 105a (on the right in FIG. 3) into its position in the third section 105c (on the left in FIG. 3) transferred. There is that

Guide element 209 its original level and finds itself at a lower level again. The transition between the first slope and the second slope, designated by W in FIG. 3a, can be understood as the inflection point of the curve of the first and second slopes shown in FIG. 3a in the mathematical sense. At the turning point, the slope changes its sign, so to speak.

FIG. 4 shows an inventive exemplary electrical circuit, here a capacitor circuit 115 for a

Electric motor 113. The capacitor circuit 115 has the

Limit switch 117 and supplies the electric motor to

preferably slight turning of the actuator around its

Longitudinal axis when initiating the activation (ie the transition from the first Aktorstellung in the second Aktorstellung), at least until the energy storage device takes over the further transfer to the second Aktorstellung, also for performing the deactivation (ie the transition from the second Aktorstellung in the first Actor position).

Provided capacitors store enough

electrical voltage, so even in the case of a

Power failure activation can still be done.

LIST OF REFERENCE NUMBERS

100 medical device; contraption

101 pick-up device

103 second abutment

105 curve section

105 'further curve section

105a first section

105a 'another first section

105b second section

105c third section

111 clutch

113 electric drive or electric motor

115 capacitor circuit

117 limit switch

200 actuators; tappet

201 end

203 first abutment

207, 113 activation device

207 energy storage device as part of

activation device

209 guide element

209a impeller

209a 'further impeller as another guide element

211 section

300 blood cassette

301 valve portion of the valve 303

303 valve

305 bridge of a hard part

307 foil longitudinal axis

transverse axis

turning point

Claims

Claims l. Medical device (100), comprising at least one receiving device (101) for at least one actuator (200) or plunger; at least one actuator (200), which is received at least in sections by the receiving device (101) and which is arranged to be transferable between at least a first and a second actuator position;

at least one activation device (207,

113) arranged to mechanically move the actuator (200) from the first actuator position to the second actuator position; wherein the activation device (207, 113) comprises at least one energy storage device (207) which is in communication with the actuator (200).

2. Device (100) according to claim 1, wherein the receiving device (101) is preferably an actuator plate; wherein the actuator (200) is preferably arranged not to be in the first Aktorstellung from the

Receiving device (101) stand out or order less from the receiving device (101)

to stand out as in the second actor position; wherein the energy storage device (207) is or comprises a spring element; and wherein the actuator (200) is arranged to be transferred from the first actuator position to the second actuator position by means of the energy storage device (207).

Apparatus according to any one of the preceding claims, comprising or connected to a blood cassette (300), wherein the blood cassette (300) or the

At least one bloodstream

Valve portion (301) of a valve (303), wherein the valve (303) can assume a closed valve position and an open valve position; wherein the actuator (200) is arranged to apply pressure to the valve portion (301) of the valve (303) in use of the device (100) in the second actuator position such that the valve (303) is in the closed valve position or in the closed valve position is maintained. Device according to one of the preceding claims, which has or is connected to an extracorporeal blood circulation, wherein the blood circulation at least one

Hose clamp portion of a hose clamp, wherein the hose clamp a

can take closed hose clamp position and an open hose clamp position; wherein the actuator (200) is arranged to be in the use of the device (100) in the second Aktorstellung pressure on the

Apply the hose clamp section of the hose clamp such that the hose clamp is transferred to the closed hose clamp position or held in the closed hose clamp position.

Device according to one of the preceding claims, wherein the device (100) or the

Receiving device (101) has a holding mechanism

by means of which the actuator (200) is held in the first actuator position.

Device according to one of the preceding claims, wherein the actuator (200) about its longitudinal axis (L) rotatably and / or along the longitudinal axis (L) slidably received in the receiving device (101) or another portion of the device (100), and / or wherein the receiving device (101) or the other portion of the device (100) or the actuator (200) at least one Curve portion (105, 105 ') has; and where the

Actuator (200) and / or the receiving device (101) or the other portion of the device (100) at least one guide element (209), which upon rotation of the actuator (200) about its longitudinal axis (L) in contact with the curved portion (105 , 105 ') is guided or slides along it.

Apparatus according to claim 6, wherein the

Curve section (105, 105 ') at least a first

Section (105a, 105a ') which, when in

Contact with the guide element (209, 209 ') the

Actuator (200) holds in the first actuator position.

Apparatus according to claim 6 or 7, wherein the

Curve section (105, 105 ') at least a first

Section (105a, 105a '), which has no slope or no positive slope of the cam portion (105, 105') relative to the transverse axis (Q) of the actuator (200) or the circumferential direction thereof.

Device according to one of claims 6 to 8, wherein the cam portion (105, 105 ') at least a third portion (105c) which, when in contact with the guide member (209, 209'), the actuator (200) in the second Actuator position stops.

Device according to one of claims 6 to 9, wherein the cam portion (105, 105 ') has at least one third portion (105c) which does not have a slope or a positive slope of the cam portion (105, 105'). relative to the transverse axis (Q) of the actuator (200) or has its circumferential direction.

Device according to one of claims 6 to 10, wherein the cam portion (105, 105 ') at least a second portion (105b) which is provided between the first and the third portion (105a, 105a', 105c), and which a slope related on the

Longitudinal axis (L) of the actuator (200) and with respect to the transverse axis (Q) of the actuator (200) or its

Having circumferential direction.

Device according to one of the preceding claims, designed as a blood treatment device or as a dialysis device, hemodialysis device,

Filtration device, diafiltration device and / or hemodialysis device.

Device according to one of the preceding claims, with a deactivation device (113) for transferring the actuator (200) from the second actuator position to the first actuator position and / or for rotating the actuator (200) about its longitudinal axis (L), wherein the

Deactivation device (113) an electric

Drive has or is such.

Device according to one of the preceding claims, with a capacitor circuit (115) or other

Voltage storage device provided for holding the activation device (207, 113) for

Transferring the actuator (200) from the first actuator position into the second actuator position or to effect that transition needed current.