Pipetting device

Abstract

The invention relates to a pipetting device (1) for receiving and expelling a volume of fluid, having a displacement apparatus (2) with a displacement means (3) and a displacement housing (4). The pipetting device (1) has an adjustment device (10) for changing the stroke of the displacement means. The stroke of the displacement means can be adjusted and the corresponding adjustment value can be displayed by means of an adjustment display (11). In the use state, the adjustment device (10) is coupled to the volume display (9) by means of a coupling device (12) and decoupled from the adjustment display (11), whereas in the adjustment state, the adjustment device (10) is coupled to the adjustment display (11) and decoupled from the volume display (9). Furthermore, the invention relates to a pipetting device (1) for receiving and expelling a volume of fluid, having an adjustment display (11) for displaying the adjustment value of the stroke of the displacement means (3). The adjustment display (11) can be adjusted in the adjustment state, whereas it is fixed in the use state.

Description

Technical Field

[0001] This invention relates to a suction and transfer device for handling liquids as described herein. Background Technology

[0002] The suction-transfer device has a displacement mechanism at which a suction-transfer tip can preferably be airtightly positioned. The suction-transfer tip can also be separated from the displacement mechanism. The displacement mechanism and the suction-transfer tip together can form a closed cavity.

[0003] The expulsion device changes the volume of the cavity, thus enabling the liquid to be drawn into and discharged from the suction tip. The suction device can have multiple expulsion devices, each with its own suction tip. The expulsion device can be operated manually or by means of a motor. The suction device can also be held by hand or be part of an automated testing device.

[0004] The displacement device can be configured as a piston-cylinder-device with a cylinder and a piston. The piston can move within the cylinder by means of a drive mechanism, wherein the piston's movement is limited by the drive mechanism and / or the piston's upper stop, lower stop, and at least one mating stop, thereby defining the piston's stroke. The suction volume, i.e., the amount of liquid received or discharged, depends on the piston's stroke; however, the piston's displacement within the cavity typically deviates from the suction volume. For suction devices with an adjustable suction volume, the piston's stroke, particularly the position of the upper stop, can be changed by means of an adjustment mechanism.

[0005] The type of suction device discussed has a volume display for showing the suction volume. In use, the adjustment device is coupled to the volume display, whereby manipulation of the adjustment device (and thus the change in the stroke of the piston) causes a change in the volume display.

[0006] The values ​​displayed by the volume indicator may now deviate from the actual adsorption volume. This deviation depends, for example, on the liquid's density and viscosity, temperature, air pressure, and wetting effects. Such deviations should, in principle, be avoided. Two feasible solutions exist to eliminate or at least reduce these deviations.

[0007] On the one hand, it is possible to change the volume display without altering the piston stroke. For this, the actual suction volume must be determined, which incurs significant overhead. Often, the transferred suction volume must be weighed, taking into account various environmental conditions. Under normal conditions, this adaptation of the volume display (factory calibration) is frequently performed by the manufacturer immediately after manufacturing or repair.

[0008] On the other hand, the piston stroke can be changed without altering the volume display. For this purpose, there is extensive literature regarding the conditions and extent under which the piston stroke can be changed. This can be performed quite easily by the user (user adjustment). However, this requires a roughly defined starting point (the initial stroke of the piston). Factory calibration is also used for this purpose.

[0009] A piston-stroke suction tube of the type described at the beginning, with a replaceable suction tip, is known from EP 1 743 701 A1. This known piston-stroke suction tube has a support holding the lower stop, an overtravel spring located between the lower stop and the support, an adjustment device for adjusting the position of the support relative to the cylinder, and a display device for displaying the position of the support. If the known piston-stroke suction tube is provided with an adjustable suction volume, it has a separate volume adjustment device for changing the position of the upper stop. The volume adjustment device is coupled to a counter for displaying the volume adjustment via a transmission mechanism.

[0010] The known piston stroke suction tube is adjusted by the user only by adjusting the lower stop, and more precisely by means of an adjustment device for adjusting the position of the support. Therefore, the positioning of the upper stop during factory calibration remains unchanged. Disadvantageously, this adjustment is performed by another adjustment device that alters the piston stroke. The support to be repositioned here is held within the housing of the known piston stroke suction tube by a threaded connection. This additional threaded connection does not represent a rigid connection to the housing. Depending on temperature and the forces present, this threaded connection is a source of error for piston stroke and volume accuracy. Furthermore, the user must manipulate an additional adjustment device.

[0011] The factory calibration can be checked and corrected by adjusting the position of the upper stop. To do this, a screwdriver tip should be inserted into a notch on the outer side of the adjusting block, and the volume adjustment device should be decoupled from the counter used to display the volume adjustment by moving the gear set. In this unstable state, the position of the upper stop can then be changed. This adjustment is uncomfortable for the user and requires delicate handling, thus increasing the probability of errors or even damage to the piston stroke suction tube. This adjustment method is also not intuitive for the user. Summary of the Invention

[0012] The objective of this invention is to improve operability, accuracy, process, and reliability when adjusting and / or calibrating known suction and displacement devices.

[0013] The above task is accomplished by a suction device as described herein. Advantageous improvements are the subject of this paper.

[0014] The recommended suction device for receiving and discharging fluid volumes includes a discharging device, a drive device, a volume display, an adjustment device, an adjustment display, and a coupling device.

[0015] The expulsion device has an expulsion component, particularly a piston and an expulsion housing, particularly a cylinder. The expulsion device is particularly configured as a piston-cylinder-device.

[0016] Furthermore, the drive mechanism is configured to move the extrusion device within the extrusion housing, wherein the movement of the extrusion device is limited by the drive mechanism and / or the upper stop, lower stop, and at least one mating stop of the extrusion device, thereby defining the stroke of the extrusion device.

[0017] The volume display is configured to display the suction volume associated with or belonging to the stroke of the extrusion device. Finally, the stroke of the extrusion device can be pre-defined with a suction volume to be received, such that the suction volume is ultimately associated with or allocated to the stroke. The volume display thus enables the display of the suction volume to a user. The display can be performed in various ways, for example, via an analog or digital display.

[0018] The adjusting device is further configured to change the stroke of the expulsion device, and in particular to change the position of the upper stop.

[0019] The adjustment display is configured to display and / or pre-define or set an adjustment value for the stroke of the displacement device. Such an adjustment value is generated by adapting the stroke and the suction volume such that the volume display can refer to the suction volume actually or at least substantially actually displaced. The adjustment value here pre-defines the extent to which possible deviations should be accounted for.

[0020] The coupling device according to the invention is configured in such a way that it can be switched between a use state and an adjustment state. Such switching can be performed by manipulation, particularly by applied force. The coupling device can be operated or manipulated, in particular, by the user of the suction / movement device.

[0021] In use, the adjustment device is coupled to and decoupled from the volume display, so that operation of the adjustment device causes a change in the volume display but not in the adjustment display. Thus, in use, the user can adapt and change the suction volume, and this change can be displayed on the volume display. Therefore, the adjustment device for adjusting the stroke of the expulsion device and, in particular, the upper stop, can be coupled to the volume display. The volume display here shows the suction volume in relation to the stroke of the expulsion device.

[0022] In the adjustment state, the adjustment device is coupled to the adjustment display and decoupled from the volume display. Thus, manipulating the adjustment device causes a change in the adjustment display but not in the volume display. Such manipulation can be performed, for example, by applied force, particularly by the user. Therefore, in the adjustment state, changes in the upper stop and / or the stroke of the expulsion device do not result in a change in the volume display. Such adjustments can be made in the adjustment state if they are intended to adapt to environmental conditions or the actual volume of suction being discharged. "Adjustment or adjustment state" hereafter refers to a situation where the user can cause a change in the stroke of the expulsion device, which is related to the suction volume, by adjusting or changing the adjustment display (which can be achieved by manipulating the adjustment device). For this purpose, the user can, for example, change the adjustment value of the adjustment display, which in turn causes a change in the upper stop via the adjustment device and thus affects the stroke of the expulsion device and also the suction volume to be discharged and received.

[0023] In principle, the user has the discretion to adjust the display to any degree. However, it is also possible to pre-define for the user the specific environmental conditions and / or fluid volumes in which adjustments to the display are required.

[0024] Advantageously, users can utilize a volume adjustment mechanism that they trust, with an adjustment device for changing the travel distance, when making user adjustments, which enables ergonomic and precisely measured adjustments.

[0025] This invention enables a comfortable and reliable switching from a usage state to an adjustment state, and vice versa.

[0026] In particular, it is unnecessary to alter the lower stop for adjusting the volume display, thus allowing the lower stop to be arranged in a proven or known manner. The lower stop is particularly reliable in its proven direct interaction with the housing (without threaded connections).

[0027] Now, especially with the device according to the invention, it is possible in a relatively simple manner for the user to adapt the suction device to the environmental conditions and / or the fluid to be suctioned or to adjust and / or tune the suction device to the environmental conditions and / or the fluid to be suctioned before and / or after using the suction device.

[0028] In use, the user can operate the suction device in a familiar manner, where the volume displayed on the volume indicator corresponds at least substantially to the actual volume discharged and received. No "conversion" of the suction volume displayed on the volume indicator is required. This is user-friendly and reduces potential sources of error when operating the suction device.

[0029] Finally, in the operational state, manipulation of the adjustment device causes a change in the stroke of the extrusion device and a change in the volume display. The adjustment display remains unchanged in this state. However, in the adjustment state, manipulation of the adjustment device, for example by applying force, causes a change in the stroke of the extrusion device and a change in the adjustment display. However, the volume display remains unchanged in the adjustment state.

[0030] Preferably, in the operating and adjustment states, the regulating device is coupled to the upper stop, whereby the operation of the regulating device, particularly by an applied force, causes a change in the position of the upper stop. Specifically, the force applied to the regulating device for operating it is transmitted to the upper stop. This change in the position of the upper stop causes a change in the stroke of the expulsion device, and consequently a change in the volume of fluid to be discharged and to be received.

[0031] In another particularly preferred design embodiment of the inventive concept, it is specified that in the calibration state, the adjustment device is coupled to the volume display and decoupled from the upper stop and the adjustment display, thereby causing a change in the volume display when the adjustment device is operated, particularly the applied force, but not a change in the adjustment display or the position of the upper stop. Such a calibration state can be performed, for example, in a manufacturing plant and can thus be referred to as "factory calibration." This allows the volume display to be adapted to the stroke of the displacing device. Such adjustment, or such possible adjustment, can thus be used for "initial calibration." The calibration state is primarily used independently of the adjustment state and, in particular, not by the user. However, the suction / displacing device and / or coupling device are constructed to occupy such a calibration state. Therefore, the accuracy and / or adaptability of the functionality of the suction / displacing device can be further improved and / or adapted.

[0032] Furthermore, in another preferred design, the coupling device is specified to have at least one first coupling device coupled to the adjustment device, particularly configured as a first gear. Additionally, the coupling device can have a second coupling device coupled to the volume display, particularly configured as a second gear. Alternatively or supplementarily, the coupling device can include a third coupling device, preferably configured as a third gear, capable of coupling to the adjustment display. The coupling devices of the coupling device can be coupled to the corresponding volume display and adjustment display in both the use state and the adjustment state, thereby enabling adjustment.

[0033] Preferably, the first, second, and third coupling devices are arranged in a manner that allows them to rotate about and move along a common axis of the coupling device. This allows the coupling devices of the coupling device to move, manipulate, and / or rotate together. It goes without saying that the coupling devices can be configured differently from each other, for example, having different diameters. Furthermore, the aforementioned coupling devices can be arranged such that, in the use state, the second coupling device is coupled to the volume display, and in the adjustment state, the second coupling device is decoupled from the volume display. In the adjustment state, on the other hand, the third coupling device can be coupled to the adjustment display, whereas in the use state, the third coupling device is not coupled to the adjustment display. Moreover, the coupling device can be configured such that the first coupling device can be coupled to or coupled to the adjustment device not only in the use state but also in the adjustment state.

[0034] Furthermore, the coupling device can be configured such that the third coupling device is not coupled to the adjustment display during calibration.

[0035] Preferably, the adjustment display has at least one digital wheel that is rotatable about the longitudinal axis of the suction device and displays a scale indicating the adjustment value for the stroke of the extrusion device. The aforementioned longitudinal axis of the suction device—about which the digital wheel is rotatable—forms, in particular, the axis of rotation of the digital wheel. Furthermore, the aforementioned longitudinal axis of the suction device is arranged, in particular, parallel to the central axis of the suction device, which forms, in particular, the approximate axis of symmetry of the suction device.

[0036] The digital dial of the adjustment display is particularly accessible from the outside and / or visible to the user. By manipulating the adjustment device, especially rotating the adjustment element of the adjustment device, the adjustment display and the displayed adjustment value can be adjusted in the adjustment state. Through the adjustment device acting in conjunction with the adjustment display, the stroke of the displacing device can be changed, preferably by changing the position of the upper stop, in the adjustment state. Furthermore, the digital dial can also have a scale, thereby ensuring high accuracy when adjusting the adjustment display.

[0037] In order to adjust the adjustment display by means of a coupling device, particularly to rotate the adjustment display around the longitudinal axis of the suction device, the adjustment display can have adjustment teeth that can engage and disengage with complementary adjustment teeth of the coupling device.

[0038] Preferably, the suction / movement device has an operating element for adjusting the coupling device. Particularly preferably, the operating element is accessible from the outside, especially by the user of the suction / movement device. For example, the operating element is arranged in a longitudinally movable manner, that is, particularly in a manner movable along the longitudinal axis of the suction / movement device. The operating element is configured such that adjustments to the coupling device by means of the operating element can be made to switch between a use state and an adjustment state. Thus, the operating element can easily switch between the use state and the adjustment state. In particular, no additional tools are required to operate the operating element, thus it can be operated tool-free, for example, by the user's hand. Therefore, a comfortable and reliable switch to the adjustment state can be achieved.

[0039] In another preferred embodiment of the inventive concept, the coupling device has a fitting device for changing the position of the coupling device. The fitting device is configured to enable axial movement of the coupling device along a common axis of the coupling device. The fitting device is particularly capable of moving along the longitudinal axis of the suction device, that is, at least substantially along the longitudinal direction of the suction device. Preferably, the fitting device can be arranged in different end positions driven by a manipulating element. The fitting device can have different constructions and is particularly capable of cooperating with a second coupling device. For example, the fitting device can be configured such that it at least partially surrounds the second coupling device.

[0040] In particular, the longitudinal movement of the actuating element causes longitudinal movement of the fitting device. Here, the actuating element can be moved by the user from a first position to a second position along the longitudinal axis of the suction device, wherein the coupling device is in a use state in the first position and in an adjustment state in the second position.

[0041] The control element can be constructed as a single piece or in multiple pieces. Preferably, the control element has a gripper that can be accessed from the outside and grasped by a user of the suction device, particularly by means of at least one finger. The control element (together with the gripper) can be moved, particularly transported, by the user applying force to the gripper, thereby adjusting the coupling device. The gripper can be constructed as an integral or separate component of the control element.

[0042] Preferably, the fitting device and the actuating element are fixedly connected to each other, especially in a torsional manner. Finally, the fitting device enables the force applied when actuating the actuating element to be transmitted to the coupling device, especially to the second coupling device.

[0043] In a preferred embodiment, the actuating element and the adjusting device are configured separately. Alternatively, it can be specified that the fitting device and the actuating element are integrally manufactured together.

[0044] In a preferred configuration where the operating element is separate from the adjustment device and has a fixed connection with the fitting device, the reset force of the reset device of the suction device, particularly the spring force, is applied to the operating element and / or the fitting device. The reset force of the reset device prevents the operating element from moving from the first position (usage state) to the second position (adjustment state). If the user does not apply force to the operating element in the second position (e.g., if the user releases the operating element), the reset force of the reset device causes the operating element to move longitudinally from the second position to the first position. Here, the fitting device moves together with and synchronously with the operating element. In other words, if the operating element is released in the adjustment state, the reset device causes the coupling device to automatically reset from the adjustment state to the usage state. The adjustment state is maintained as long as the operating element is held in the second position. This prevents unintentional suction using the suction device in the adjustment state. Furthermore, this design allows for easy and intuitive operation without tools. This saves time when using the suction and transfer device and improves the operation of the suction and transfer device.

[0045] An alternative to the implementation described above can be specified that, during movement between the first and second positions, the spring force of the suction device is applied to the engaging device only along a portion of the path. Specifically, the spring device can be arranged at the engaging device and / or at the actuating element. The spring device particularly enables improved force transmission from the actuating element to the engaging device. The spring device particularly facilitates operation of the actuating element, enabling, on the one hand, the engagement of the corresponding coupling devices and on the other hand, allowing the adjustment state to be occupied only temporarily. In this implementation, the operating state is also "automatically" occupied by spring reset after the load is removed.

[0046] In another embodiment, the adjusting device has the actuating element, and in particular, the adjusting sleeve of the adjusting device can form the actuating element. This embodiment particularly represents an alternative to the previously described embodiment having an actuating element separate from the adjusting device. In this other embodiment, the adjusting sleeve (and thus the actuating element) is configured to change the stroke of the extrusion device and to change the volume display, and for this purpose is configured to be rotatable about the longitudinal axis of the suction device. As the actuating element, the adjusting sleeve is further configured to adjust the coupling device to a use state and / or an adjustment state, and for this purpose is movable along the longitudinal axis of the suction device. The movement of the adjusting sleeve can be initiated, in particular, by external intervention, preferably by the user of the suction device.

[0047] Preferably, the adjusting sleeve and the fitting device are supported in a manner that allows them to rotate relative to each other and / or are connected in a manner that allows them to move longitudinally.

[0048] In another preferred embodiment, the adjusting sleeve is releasably fixed in different positions by means of a retaining device of the suction device, thereby facilitating the operation. By fixing the adjusting sleeve with the retaining device, undesirable triggering of the adjusting sleeve as an actuating element can be avoided, and thus undesirable switching to possible states (either the use state or the adjustment state) can be prevented.

[0049] In a particularly preferred design—which is especially advantageous in the integrated construction of the externally accessible operating element and the mating device—it is specified that, in order to couple the mating device with the adjusting device, the mating device has a coupling element and the adjusting device has a mating coupling element. The coupling element and the mating coupling element are configured in such a way that rotational movement of the adjusting device, particularly the adjusting sleeve, can be prevented when transitioning from the operating state to the adjusting state and / or from the adjusting state to the operating state. In this respect, it can be specified that the prevention of rotational movement is configured so that rotation of the adjusting device, particularly the adjusting sleeve, can only be resumed in the adjusting state. Thus, the adjusting device can be locked when transitioning from the operating state to the adjusting state or vice versa. This prevents accidental rotational movement, which in particular could cause undesirable engagement of the gears, especially those constituting the transmission mechanism. Therefore, for example, it can be avoided that the teeth of the adjusting device undesirably engage and / or jam with the first coupling element.

[0050] In use, the adjustment display is decoupled from the adjustment device and is not engaged with the coupling device. In this state of use, adjustment of the adjustment display should be avoided. According to a preferred embodiment, the adjustment display is fixed in use, particularly stopped, to prevent rotation about the longitudinal axis of the suction device. Preferably, the fixing of the adjustment display in use is achieved by means of locking teeth on the adjustment display and complementary locking teeth on the operating element. The operating element is configured to resist torsion relative to the longitudinal axis of the suction device and cannot rotate in the circumferential direction. By operating the operating element, the locking teeth of the operating element and the locking teeth of the adjustment display can engage and disengage. In use, the locking teeth of the operating element and the locking teeth of the adjustment display are engaged. In this state of use, this mutual engagement prevents adjustment, especially rotation, of the adjustment display. If the device is switched from the operating state to the adjustment state by manipulating, in particular moving, the locking teeth of the operating element disengage from the locking teeth of the adjustment display. In the adjustment state, the adjustment display can be adjusted, and in particular, rotated about the longitudinal axis of the suction device. Higher precision is advantageous here because it is impossible to accidentally adjust the adjustment display.

[0051] Another aspect, which can be achieved without relying on the suction device explained above, relates to a suction device for operating on liquids as described herein.

[0052] This suction device, as recommended, for receiving and discharging fluid volumes, includes a discharging mechanism, a drive mechanism, and an adjustment display.

[0053] The expulsion device includes an expulsion component, particularly a piston, and an expulsion housing, particularly a cylinder. The expulsion device is particularly configured as a piston-cylinder-device.

[0054] The drive mechanism is configured to move the extrusion device within the extrusion housing, wherein the movement of the extrusion device is limited by the drive mechanism and / or the upper stop, lower stop, and at least one mating stop of the extrusion device, thereby defining the stroke of the extrusion device.

[0055] The adjustment display is configured to display and / or pre-determine or set adjustment values ​​for the stroke of the extrusion device. Such adjustment values ​​are generated by adapting the stroke and the suction volume such that the volume display can refer to the actual or at least substantially actual suction volume displaced. The adjustment values ​​here pre-determine the extent to which possible deviations are accounted for.

[0056] In the adjustment state of the suction and transfer device, the stroke of the expulsion device is adjustable and the adjustment display is adjustable, particularly allowing rotation about the longitudinal axis of the suction and transfer device. In the use state of the suction and transfer device, the stroke of the expulsion device is adjustable and the adjustment display is fixed, particularly stopped, to prevent rotation about the longitudinal axis of the suction and transfer device.

[0057] Preferably, the suction / transfer device has an operating element that is preferably accessible from the outside, used to switch the suction / transfer device from a use state to an adjustment state and vice versa. The operating element is movable along the longitudinal axis of the suction / transfer device to switch between these states. The operating element is torsionally resistant relative to the longitudinal axis of the suction / transfer device. The adjustment display has locking teeth, and the operating element has complementary locking teeth. Through movement of the operating element along the longitudinal axis of the suction / transfer device, the locking teeth of the operating element and the locking teeth of the adjustment display can engage and disengage. In the use state, the locking teeth of the operating element and the locking teeth of the adjustment display are engaged. In the adjustment state, the locking teeth of the operating element and the locking teeth of the adjustment display are disengaged.

[0058] The aspects and features mentioned above in this invention, as well as those derived from other descriptions, can be implemented independently of each other, but also in any combination. Attached Figure Description

[0059] Further advantages, features, characteristics, and aspects of the present invention will become apparent from the foregoing description and the following description of preferred embodiments with reference to the accompanying drawings.

[0060] in:

[0061] Figure 1 A schematic perspective view of a prior art suction and displacement device is shown.

[0062] Figure 2 It shows according to Figure 1 A schematic cross-section of the suction device along with the suction tip placed thereon.

[0063] Figure 3 A schematic perspective view of a portion of the suction and displacement device according to the invention is shown.

[0064] Figure 4 It shows according to Figure 3 A schematic side view of a portion of the suction and transfer device in use, but omitting the housing of the suction and transfer device.

[0065] Figure 5It shows according to Figure 3 A schematic side view of a portion of the suction and transfer device in an adjusted state, but omitting the housing of the suction and transfer device.

[0066] Figure 6 It shows according to Figure 3 A schematic partial cross-section of a portion of the suction / distraction device in calibration mode.

[0067] Figure 7 It shows in Figure 4 The schematic cross-section VII-VII of the suction device shown is in use.

[0068] Figure 8 It shows in Figure 5 The schematic cross-section VIII-VIII of the suction device shown in the adjustment state is illustrated.

[0069] Figure 9 It shows in Figure 5 A schematic cross-section IX-IX of the control element in the adjusted state is shown.

[0070] Figure 10 It shows in Figure 9 The schematic cross-section of the segment of the control element shown in another state.

[0071] Figure 11 A schematic perspective view of a portion of a second embodiment of the suction and displacement device according to the invention in use is shown.

[0072] Figure 12 A schematic perspective view of a portion of a second embodiment of the suction and displacement device according to the invention in an adjusted state is shown.

[0073] Figure 13 A schematic perspective view of a portion of a second embodiment of the suction-displacement device according to the invention in a calibration state is shown.

[0074] Figure 14 A schematic perspective view shows the cutting portion of the suction-movement device according to the invention in use according to a third embodiment.

[0075] Figure 15 A schematic perspective view shows the cut-off portion of the adjusting sleeve according to the invention for the suction and displacement device according to the third embodiment.

[0076] Figure 16 A schematic perspective view shows the cut-off portion of the fitting device for the suction-displacement device according to the third embodiment.

[0077] Figure 17 A schematic perspective view shows the cutting portion of the suction device according to the third embodiment in use.

[0078] Figure 18 A schematic perspective view shows the cutting portion of the suction device according to the third embodiment in the first switching state.

[0079] Figure 19 A schematic perspective view shows the cutting portion of the suction device according to the third embodiment in the second switching state.

[0080] Figure 20 A schematic perspective view shows the cutting portion of the suction device according to the third embodiment in an adjusted state.

[0081] Figure 21 A schematic perspective view shows a cut-off portion of the suction-displacement device according to the invention according to a fourth embodiment, wherein some components of the suction-displacement device are omitted;

[0082] Figure 22 A schematic perspective view shows the cutting portion of the suction-transfer device according to the invention in use according to a fifth embodiment, wherein some components of the suction-transfer device are omitted, and

[0083] Figure 23 It shows according to Figure 22 The suction and transfer equipment is in the adjustment state.

[0084] In the attached figures, the following reference numerals are used: 1 represents the suction device; 1A represents the housing; 1B represents the suction tip; 2 represents the expulsion device; 3 represents the expulsion component; 4 represents the expulsion housing; 5 represents the drive device; 6 represents the upper stop; 7 represents the lower stop; 8 represents the mating stop; 9 represents the volume display; 9A represents the teeth of 9; 10 represents the adjustment device; 11 represents the adjustment display; 11A represents the adjustment teeth of 11; 11B represents the digital wheel of 11; 12 represents the coupling device; 13 represents the first coupling device of 12; 14 represents the second coupling device of 12; 15 represents the third coupling device of 12; 16 represents the operating element; 17 represents the fitting device; 18 represents the spring device; 19 represents the holding device; 20 represents the coupling. Components; 21 indicates a mating coupling element; 22 indicates the tooth of 20; 23 indicates an adjusting device; 24 indicates an operating element; 25 indicates an opening; 26A indicates the operating knob of 19; 26B indicates the bending spring of 19; 26C indicates the positioner of 19; 27 indicates an adjusting sleeve; 27A indicates the internal tooth of 27; 28 indicates the external tooth of 27; 29 indicates the volume display wheel of 9; 30 indicates a lever; 31 indicates the drive lever of 5; 32 indicates the reset device of 2; 33 indicates a pressure spring; 34 indicates the groove of 27; 35 indicates the reset device for 16; 36 indicates the locking tooth of 11; 37 indicates the locking tooth of 16; A indicates the common axis of 12; L indicates the longitudinal axis of 1; B indicates the axis of 9. Detailed Implementation

[0085] The same reference numerals are used for the same or similar parts in the accompanying drawings, wherein the corresponding features and advantages are realized even if repeated descriptions are omitted for the sake of simplicity.

[0086] Figure 1 A prior art suction device 1 for receiving and discharging fluid volumes is shown. The suction device 1 is held and guided by hand or by a robot at its housing 1A. Figure 2 It shows in Figure 1 The schematic cross-section of the suction device 1 shown, together with the suction tip 1B placed thereon.

[0087] The following uses Figure 1 and Figure 2 To explain the same features as those in the suction device 1 according to the present invention in the prior art suction device 1.

[0088] The suction device 1 according to the present invention (also like the suction device 1 of the prior art) has a displacement device 2. The functionality of the displacement device 2 can be referred to... Figure 2 The functionality of the cross-section shown can also be transferred to embodiments according to the present invention.

[0089] By means of the expulsion device 2, fluid, especially liquid, can be received into the suction tip 1B and then discharged from the suction tip. The expulsion device 2 has an expulsion element 3 and an expulsion housing 4. In the illustrated and preferred embodiment, the expulsion device 2 is configured as a piston-cylinder-device, such that the expulsion element 3 is configured as a piston and the expulsion housing 4 is configured as a cylinder.

[0090] The suction device 1 and / or the expulsion device 2 preferably have an elongated shape or a longitudinal axis L. The longitudinal axis L preferably extends centrally through the expulsion device 2, especially the expulsion device 3 and the expulsion housing 4.

[0091] If concepts such as "axial" or "axial direction" are used below, this refers to the longitudinal axis L. Similarly, concepts such as "radial" or "radial direction" also refer to the longitudinal axis L and indicate a direction perpendicular to the longitudinal axis L. If concepts such as "above" or "below" are used below, this refers to the extension of the longitudinal axis L.

[0092] The expulsion housing 4 forms a cavity that is open toward the suction tip 1B and otherwise airtight. The expulsion device 3 is preferably movable axially and / or along the longitudinal axis L and relative to the cavity. By means of the expulsion device 3, the volume of the cavity can be changed, so that when the cavity expands due to the generated negative pressure, fluid, especially air, can be drawn into the cavity, and when the volume shrinks, it can be expelled or forced out of the cavity. The expulsion device 3 is preferably sealed relative to the expulsion housing 4, particularly by means of a seal.

[0093] The expulsion device 2 preferably has a reset device 32, particularly a reset spring. By means of the reset device 32, the expulsion device 3 can be moved to an initial position, particularly to a position with the maximum volume of the cavity, which corresponds to the direction of fluid intake or the direction opposite to the direction of fluid discharge.

[0094] The expulsion housing 4 preferably has or forms a rod portion 30 of the suction device 1. The rod portion 30 is used to releasably fix the suction tip 1B and has an opening 25 that connects the expulsion housing 4 to the suction tip 1B as already explained.

[0095] The suction tip 1B is a generally conical tube with two opposing openings, each with a different cross-section. The larger opening allows the suction tip 1B to be inserted into the rod portion 30, forming an airtight connection. Liquid can then be drawn into the suction tip 1B through a variable cavity and subsequently discharged.

[0096] The suction device 1 has a drive mechanism 5 for moving the extrusion device 3 within the extrusion housing 4. The drive mechanism 5 has a drive rod 31. The drive rod 31 is axially and / or extends along the longitudinal axis L. The drive rod 31 is preferably movable in the axial direction and / or at least substantially parallel to the extrusion device 3. The drive mechanism 5 preferably has an operating element 24. The drive mechanism 5 is particularly operable via the operating element 24.

[0097] The operation of the operating element 24, particularly pressing it down, results in the drive rod 31 pressing against the extrusion device 3, causing the extrusion device 3 to move into the extrusion housing 4 and reduce the volume of the cavity. Correspondingly, by operating the drive device 5 or the operating element 24, fluid can be discharged from the suction device 1, particularly via the rod portion 30 and the suction tip 1B.

[0098] Without being manipulated, the displacing device 3 and the driving device 5 or the driving rod 31 and / or the operating element 24 autonomously, especially by means of a reset performed by the reset device 32, occupy their initial positions.

[0099] As an alternative or supplement to the operating element 24, the displacing device 2 can also be operated automatically or by motorization.

[0100] Preferably, the movement of the extrusion device 3 is limited by the upper stop 6, lower stop 7, and at least one paired stop 8 of the drive device 5 and / or the extrusion device 3, thereby limiting the stroke of the extrusion device 3. Preferably, the stroke of the drive device 5, the drive rod 31, or the extrusion device 3 can be changed by the upper stop 6 and / or the lower stop 7.

[0101] The mating stop 8 can be configured as a stop section of the drive rod 31. In particular, the mating stop 8 is integrally formed with the drive rod 31 and / or extends radially from the drive rod 31 and / or is flange-shaped.

[0102] When operating the suction device 1, the extrusion device 2, the drive device 5, or the operating element 24, especially when the drive rod 31 moves in the axial direction, it is preferable that the paired stop 8 stops at the lower stop 7, which restricts the axial movement or lifting movement.

[0103] When the expulsion device 2 or the drive device 5 is reset, especially by means of the reset device 32, it is preferable that a stop occurs in the suction direction between the mating stop 8 and the upper stop 6, which restricts the axial movement or lifting movement.

[0104] When the mating stop 8 stops at the upper stop 6, it is preferably in an unmanipulated state and / or the volume in the cavity is at its maximum. In particular, the maximum accommodable fluid volume is determined by the position of the upper stop 6.

[0105] Preferably, the axial position of the upper stop 6 is adjustable, thereby allowing the setting of the maximum accommodating fluid volume or the cavity volume. For this purpose, the suction / transfer device 1 or the drive device 5 has an adjustment device 10. The adjustment device 10 may have an adjustment element 23. Preferably, a threaded connection is formed between the adjustment element 23 and the upper stop 6, and / or the adjustment element 23 has an internal thread and the upper stop 6 has a corresponding external thread. The threaded connection allows the setting of the axial position of the upper stop 6, thereby setting the maximum accommodating volume.

[0106] In addition to the adjusting device 23, the adjusting device 10 may have an adjusting sleeve 27 that is operatively connected to the adjusting device 23. Therefore, the axial position of the upper stop 6 can also be set by means of the adjusting sleeve 27, especially by means of the rotation of the adjusting sleeve 27.

[0107] The suction / displacement device 1 has a volume display 9 arranged in a housing 1A. The volume display 9 may include a plurality of volume display wheels 29 (digital wheels) for displaying volume values ​​through openings or windows in the housing 1A. The volume display 9 is driven by an adjustment device 10 or an adjustment mechanism 23 and is configured to display the suction / displacement volume associated with or related to the stroke of the extrusion device 3. When the volume display 9 is changed, particularly by manipulating the adjustment device 10, the individual volume display wheels 29 of the volume display 9 can be moved.

[0108] The following explains the features that differ from those in the prior art suction device 1 in the suction device 1 according to the present invention. First, refer to… Figure 3 , Figure 3 A schematic perspective view of a portion of the suction and displacement device 1 according to the present invention is shown.

[0109] Figure 4 It shows according to Figure 3 A schematic side view of a portion of the suction device 1 in use, but omitting the housing 1A of the suction device 1. Figure 5 It shows according to Figure 3 A schematic side view of a portion of the suction device in an adjusted state, but omitting the housing 1A of the suction device 1. Figure 6 It shows according to Figure 3A schematic partial cross-section of a portion of the suction / distraction device in a calibrated state. This partial cross-section does not extend through all the components shown, as some components should be shown in perspective for the purpose of interpretation.

[0110] For the recommended suction / distraction device 1, an adjustment display 11 is provided, which is used to display... Figures 3 to 6 The adjustment value of the stroke of the extrusion device 3 (not shown) is displayed. The adjustment display 11 can change in the adjustment state. Furthermore, the adjustment display 11 can be coupled to the adjustment device 10.

[0111] The proposed suction device 1 has a coupling device 12 by means of which the adjusting device 10 is coupled to the volume display 9 and decoupled from the adjusting display 11 during use. Thus, operation of the adjusting device 10, particularly the rotation of the adjusting element 23 and / or the adjusting sleeve 27 about the longitudinal axis L, causes a change in the volume display 9 but not a change in the adjusting display 11. In this respect, as in... Figure 4 The usage state shown specifies that the adjustment display 11 and the coupling device 12 are disengaged. The volume display 9 and the adjustment device 10 are engaged with the coupling device 12, thereby enabling coupling between the volume display 9 and the adjustment device 10.

[0112] Furthermore, the coupling device 12 is configured to couple the adjusting device 10 to the adjusting display 11 and decouple it from the volume display 9 in the adjustment state, thereby causing a change in the adjusting display 11 by operating the adjusting device 10, particularly the rotation of the adjusting device 23 and / or the adjusting sleeve 27 about the longitudinal axis L, but not by the volume display 9. According to the proposed suction device 1... Figure 5 It is shown in the adjustment state.

[0113] The adjustment device 10 shown in the accompanying drawings can be operated by force applied by the user or, for example, by a motor.

[0114] The following is according to Figures 3 to 10 The first embodiment of the coupling device 12, the adjustment device 10, the adjustment display 11, and the structure and joint operation of the adjustment device 10 are described.

[0115] In the illustrated and preferred embodiment, the adjusting device 10 is coupled to the upper stop 6 in both the use and adjustment states, thereby causing a change in the position of the upper stop 6, for example, by manipulation of the adjusting device 10 by an applied force. In particular, such a change in position is transmitted to the upper stop 6 by the force applied to the adjusting device 10.

[0116] However, in addition to the usage state and the adjustment state, the suction device 1 can also preferably occupy another state, that is, in Figure 6 The so-called calibration state is shown in detail. In the calibration state, the adjustment device 10 is coupled to the volume display 9 and decoupled from the upper stop 6 and the adjustment display 11, so that operation of the adjustment device 10, especially operation or rotation of the adjustment device 23 and / or the adjustment sleeve 27, causes a change in the volume display 9, but does not cause a change in the adjustment display 11 and does not cause a change in the position of the upper stop 6. Figure 6 It is shown that the adjustment device 10 is coupled to the volume display 9, particularly by means of coupling device 12 at least partially coupling the adjustment device 10 to the volume display 9 via the mutual engagement of corresponding teeth. However, no coupling is provided between the adjustment device 10 and the adjustment display 11, particularly the adjustment teeth 11A of the adjustment display 11 are disengaged from the coupling device 12.

[0117] The coupling between the adjustment display 11 or volume display 9 and the adjustment device 10, especially the teeth 28 or adjustment sleeve 27 of the adjustment device 10, can be ensured by the coupling device 12.

[0118] exist Figure 4 The final state of use shown is such that the change in the upper stop 6 is caused by the rotation of the volume display 9, particularly through the adjustment device 23 and / or the adjustment sleeve 27, about the longitudinal axis L—which causes the volume display wheel 29 to rotate about axis B, which extends at least substantially parallel to the longitudinal axis L and / or forms another longitudinal axis of the suction device 1. This state of use is employed by the user when they wish to adjust or change the volume to be suctioned and thereby adjust or change the stroke of the expulsion device 2.

[0119] If the volume display 9 should be adapted to the actual volume being displaced, then it is finally set at... Figure 5The adjustment state is shown. For example, due to the state of the fluid to be transferred and / or external environmental conditions, there may be a deviation between the value displayed by the volume display 9 and the actual volume transferred. Such a deviation can be "corrected" by means of the adjustment display 11. The adjustment value to be set on the adjustment display 11 can be determined in different ways. For example, the user can be given a pre-set adjustment value determined according to known fluid and / or known environmental conditions, which is then set by the user in the adjustment display 11, preferably by the rotation of the adjustment device 23 and / or the adjustment sleeve 27. Then, in the adjustment state, it is specified that the stroke of the expulsion device 2 can be changed according to the adjustment value of the adjustment display 11.

[0120] exist Figure 6 The calibration state set in the device is not set by the user. If a "start calibration" or "start setting" of the suction device 1 is required, such a calibration state can then be set, for example, at the manufacturing plant after manufacturing. Therefore, for example, a change in the volume display 9 can be caused by a change in the adjustment device 10, but the position of the upper stop 6 is not changed, and thus the stroke of the expulsion device 2 is not changed in particular.

[0121] exist Figure 6 A preferred embodiment is shown, in which the adjusting sleeve 27 has an internal toothed portion 27A and the upper stop 6 has an external toothed portion 6A. In the calibration state, the internal toothed portion 27A is separated from the external toothed portion 6A by axial movement of the adjusting sleeve 27. In the use and adjustment states, the two internal toothed portions 27A and 6A are connected in a torsion-resistant manner in the opposite direction.

[0122] exist Figures 4 to 6 As can be seen, in the illustrated and preferred embodiment, the coupling device 12 has at least one first coupling element 13 coupled to the adjustment device 10. The coupling between the adjustment device 10 and the first coupling element 13 (and thus the coupling device 12) exists not only in the use state but also in the adjustment state and the calibration state. In the illustrated and preferred embodiment, the first coupling element 13 is constructed as a first gear 13.

[0123] The first coupling device 13 is particularly capable of coupling with the external gear portion 28 of the adjusting device 10, wherein the external gear portion 28 is particularly arranged on the outer side surface of the adjusting sleeve 27. Here, the first coupling device 13 and the external gear portion 28 of the adjusting sleeve 27 can functionally constitute a cylindrical gear transmission mechanism for driving the adjusting device 10.

[0124] Furthermore, the coupling device 12 includes at least one second coupling device 14 capable of coupling with the volume display 9. This second coupling device is preferably configured as a second gear 14 and is rotatably rigidly connected to the first coupling device 13. The second coupling device 14 can couple with a corresponding tooth 9A of the volume display 9, wherein the tooth of the volume display 9 is arranged in a manner rotatable about axis B. Therefore, the tooth of the volume display 9 can, in particular, form a cylindrical gear transmission mechanism with the second coupling device 14, and more precisely, in the state of use, form such a cylindrical gear transmission mechanism.

[0125] The coupling device 12 includes at least one third coupling device 15 that can be coupled to the adjustment display 11. This third coupling device 15 is preferably configured as a third gear 15 and is rotatably rigidly connected to the first coupling device 13. The third coupling device 15 forms another cylindrical gear transmission mechanism in engagement and can be configured between the third coupling device 15 and the adjustment teeth 11A of the adjustment display 11 in the adjustment state. Thus, in the adjustment state, the teeth of the third gear or the third coupling device 15 can engage with the adjustment teeth 11A of the adjustment display 11.

[0126] In the illustrated and preferred embodiment, the first coupling device 13, the second coupling device 14, and the third coupling device 15 are arranged in a manner that allows them to rotate about a common axis A of the coupling device 12. The axis A extends, in particular, at least substantially parallel to the longitudinal axis L of the suction / transfer device 1 and / or parallel to the (rotational) axis B, and / or the axis A preferably forms another longitudinal axis of the suction / transfer device 1 and / or the coupling device 12.

[0127] In particular, the first coupling device 13, the second coupling device 14 and the third coupling device 15 are arranged in a manner that allows them to move along this common axis A.

[0128] exist Figures 4 to 6 In the illustrated embodiment, the adjustment display 11 has at least one digital wheel 11B that is rotatable about the longitudinal axis L of the suction device 1 and displays a scale indicating the adjustment value for the stroke of the extrusion device 3. The digital wheel 11B is particularly configured such that the display of the adjustment value is externally visible, as shown in… Figure 3 As shown in detail in the diagram. For this purpose, the housing 1A may, for example, have an opening. Adjustment teeth 11A that can engage with the third coupling device 15 may be arranged or constructed at the digital wheel 11B of the adjustment display 11.

[0129] Figure 3As shown, the suction device 1 has an operating element 16. In the illustrated and preferred embodiment, the operating element 16 is particularly accessible to the user from the outside. The operating element 16 is configured to adjust the coupling device 12. Adjustment of the coupling device 12 by means of the operating element 16 enables switching between a use state and an adjustment state, and vice versa. In particular, the operating element 16 is arranged in a manner that allows for longitudinal or axial movement.

[0130] Figure 3 As shown, the housing 1A has a corresponding opening, thereby ensuring accessibility to the actuating element 16 disposed inside the housing 1A. Alternatively or supplementary, in another embodiment, the actuating element 16 may also be able to protrude or terminate flush with the housing 1A.

[0131] Figures 4 to 6 As shown, the coupling device 12 preferably has a fitting device 17 for changing the position of the coupling device 12. In particular, the fitting device 17 is configured to move the coupling device 12 axially along its axis A. The fitting device 17 is particularly capable of cooperating with the actuating element 16. Thus, the fitting device 17 is particularly capable of transmitting the force applied to the actuating element 16 for axial movement of the coupling device 12. Preferably, the fitting device 17 is capable of moving along the longitudinal axis L of the suction / transfer device 1, particularly parallel to the longitudinal axis L of the suction / transfer device 1. In particular, the fitting device 17... Figures 4 to 6 In the illustrated and preferred embodiment, the coupling device 17 is arranged in a torsional-resistant manner (non-rotatable about the longitudinal axis L). Preferably, the coupling device 17 is driven by the actuating element 16 and can be positioned in different endpoint positions. In particular, longitudinal movement of the actuating element 16 causes longitudinal movement of the coupling device 17. Here, the actuating element 16 can be moved by the user from a first (endpoint) position to a second (endpoint) position along the longitudinal axis of the suction device 1, wherein in the first (endpoint) position the coupling device 12 is in an operating state, and in the second (endpoint) position the coupling device 12 is in an adjustment state. Figure 4 and Figure 5 The image shows two end positions of the fitting device 17 and the first and second positions of the manipulator 16, which represent the use state and the adjustment state, respectively.

[0132] The fitting device 17 is capable of surrounding at least one coupling device of the coupling device 12, particularly the second coupling device 14, for adjusting the coupling device 12, such as in Figure 4 and Figure 5As shown in the diagram. In particular, the fitting device 17 can be configured at least partially in a forked shape and / or form a receiving portion for the second coupling device 14 in order to surround the second coupling device 14.

[0133] exist Figures 4 to 6 In the illustrated and preferred embodiment, the fitting device 17 and the actuating element 16 are integrally formed together. Alternatively or supplementary, the fitting device 17 and the actuating element 16 may be fixedly, and especially torsionalally, connected to each other.

[0134] exist Figure 7 and Figure 8 The corresponding cylindrical gear transmission mechanism is shown in detail. Therefore, Figure 7 It shows Figure 4 Section VII-VII, and Figure 8 Then it shows Figure 5 Section VIII-VIII.

[0135] Figure 7 As shown, in the operational state, the rotation of the adjusting device 23 with external teeth 28 and / or the adjusting sleeve 27 about the axis L causes the first coupling device 13 (and thus the second coupling device 14 and the third coupling device 15) to rotate, which in turn causes the volume display 9 to rotate. The volume display 9 is thus engaged with the adjusting device 10. The movement of the adjusting device 10 also causes a change in the position of the upper stop 6 in the operational state.

[0136] exist Figure 8 The adjustment status is shown in the image. Figure 8 As shown, the third coupling device 15 is engaged with the adjustment teeth 11A of the adjustment display 11. The rotation of the adjustment display 11 about the longitudinal axis L is caused by the rotation of the third coupling device 15 about axis A, and the rotation of the third coupling device about axis A is caused by the rotation of the first coupling device 13. Figure 8 Not shown in detail, in the adjustment state, the first coupling device 13 is also engaged with or coupled to the outer tooth 28 of the adjustment device 10. The movement of the adjustment device 10 in the adjustment state also causes a change in the position of the upper stop 6.

[0137] exist Figure 9 and Figure 10 The preferred design of the first embodiment of the suction device 1 described above is shown in the figure. Figure 9 and Figure 10 It shows along Figure 5 The IX-IX section. In Figure 9 and Figure 10The diagram shows a spring device 18 provided with the suction device 1. The spring device 18 is configured such that, during movement between the endpoint positions, the elastic force of the spring device 18 of the suction device 1 is applied to the actuating element 16 along a partial path. Preferably, the spring device 18 is arranged at the actuating element 16 and / or at the fitting device 17.

[0138] exist Figure 11 , Figure 12 and Figure 13 The figure shows another preferred embodiment of the suction device 1 without housing 1A. Figure 11 , Figure 12 and Figure 13 The embodiments shown are similar to those in Figures 3 to 10 The illustrated embodiment differs in that the actuating element 16 is now formed by the adjusting device 10, particularly the adjusting sleeve 27. However, the additional, principled, and previously described functionality, particularly the coupling of the adjusting display 11 or volume display 9 with the adjusting device 10 in the use or adjustment state, is at least substantially the same here. Therefore, referring to the previous explanation regarding the functionality of the coupling device 12, the previous explanation can also be applied in the same manner to the second embodiment described below.

[0139] Figure 11 The usage status is shown, while Figure 12 This shows the adjustment state and Figure 13 The calibration status is shown.

[0140] As in Figures 11 to 13 As shown, in the second embodiment, the adjusting device 10 is specified to have or form an actuating element 16 or additionally provide an actuating element 16. In particular, the adjusting sleeve 27 forms the actuating element 16. The adjusting sleeve 27 is configured to rotate about the longitudinal axis L of the suction device 1 in order to change the stroke of the extrusion device 3 and to change the volume display 9 or adjust the display 11. As an actuating element, the adjusting sleeve 27 is also capable of moving along the longitudinal axis L of the suction device 1 for use as previously described by means of… Figures 4 to 6 The coupling device 12 is adjusted to the use state, adjustment state and / or calibration state as described and referenced.

[0141] exist Figures 11 to 13The diagram shows three different axial positions or locations of the adjusting sleeve 27. Specifically, the adjusting sleeve 27 can be releasably fixed in the shown axial positions by means of the retaining device 19 of the suction device 1. The retaining device 19 can specifically include an operating knob 26A, a bending spring 26B, and a positioner 26C. The adjusting sleeve 27 can move along the longitudinal axis L of the suction device 1 by means of the retaining device 19 and is fixed by engaging the positioner 26C into one of a plurality of slots.

[0142] Preferably, the adjusting sleeve 27 and the fitting device 17 are supported in a manner that allows them to rotate relative to each other and / or are connected in a manner that allows them to move longitudinally.

[0143] The fitting device 17 is preferably pre-tightened against the adjusting sleeve 27 by means of a spring, especially by means of a pressure spring 33, and / or has a spring device 18.

[0144] In the second embodiment, the spring device 18 is in Figures 11 to 13 Not shown, it has an additional intermediate position between the two endpoint positions. These three positions correspond to the axial movement of the adjusting sleeve 27 and the fixing performed by the retaining device 19 in the use, adjustment, and calibration states, as previously referred to. Figures 4 to 6 As described.

[0145] The following describes a third preferred embodiment of the suction device 1, which... Figures 14 to 20 As shown in, and especially according to Figures 4 to 6 A particularly preferred design of the first embodiment of the suction device 1. Compared to... Figures 4 to 6 In the embodiment shown, the adjusting sleeve 27 or the fitting device 17 has a coupling element 20 that prevents rotation of the adjusting sleeve 27 or the adjusting device 23 during switching from the use state to the adjustment state or vice versa.

[0146] As in Figure 16 As shown, the coupling element 20 can therefore include teeth 22. The adjusting device 10, and especially the adjusting sleeve 27, can preferably have, on its inner side, i.e., at a position away from the housing 1A, as shown... Figure 15 The paired coupling element 21 is shown. The coupling element 20, especially the tooth 22, is capable of coupling and decoupling from the paired coupling element 21.

[0147] Figure 15 The adjusting sleeve 27 with the mating coupling element 21 and the slot 34 is shown. Figure 14The third preferred embodiment of the suction device 1 is shown in its operational state, along with the rotatable adjusting device 10, adjusting sleeve 27, coupling device 12, and volume display 9. In the operational state, the teeth 22 are positioned inside the groove 34, thereby enabling the rotation of the adjusting sleeve 27. The coupling element 20 is decoupled from the mating coupling element 21.

[0148] exist Figures 17 to 20 The text details how it is done in accordance with... Figure 14 The usage state is the functionality of the coupling between the coupling element 20 and the paired coupling element 21 when the starting point is switched. Figures 17 to 20 States I through IV are shown, wherein the states are distinguished from each other by the different axial positions occupied by the adjusting sleeve 27.

[0149] Finally, the coupling element 20 and the mating coupling element 21 are configured such that rotational movement of the adjusting device 10 can be prevented when transitioning from the use state to the adjustment state and / or from the adjustment state to the use state. This is particularly advantageous because it prevents undesirable hooking and rotation during switching between the adjusting device 10 and the coupling device 12. Finally, it enables the stopping of the adjusting device 10 when switching from the use state to the adjustment state and / or vice versa.

[0150] Figure 17 As shown, in the usage state (state I), the coupling element 20 is not yet engaged with the mating coupling element 21. In particular, the teeth 22 of the coupling element 20 are not engaged with the mating coupling element 21.

[0151] However, if the adjustment sleeve 27 is manipulated downwards in the illustrated embodiment, causing a switch from the use state to the adjustment state, then a longitudinal movement of the adjustment sleeve 27 occurs, as is the case in... Figure 18 This is illustrated as the first switching state (state II). In this switching, the coupling element 20 is thereby engaged with the mating coupling element 21, wherein the second coupling device 14 and the volume display 9 are initially engaged and disengaged as the adjusting sleeve 27 moves further longitudinally. In this state, rotational movement of the adjusting device 10, particularly the adjusting sleeve 27 and / or the adjusting device 23, preferably about the longitudinal axis L is prevented.

[0152] Figure 19The second switching state (state III) is shown, in which the adjusting device 17 and the adjusting sleeve 27 are moved further toward the rod 30 in order to further switch to the adjustment state, wherein the coupling element 20 and the mating coupling element 21 are engaged and the gears 15 and 11 are engaged.

[0153] then, Figure 20 The adjustment state (state IV) is shown, in which the rotational movement of the adjustment device 10 is restored because the coupling element 20 and the mating coupling element 21 are no longer engaged and the adjustment device 10, preferably the adjustment device 23, is no longer locked and the adjustment display 11 can be driven by the gear 15.

[0154] Thus, the rotational movement of the adjustment device 10, preferably the adjustment element 23, is prevented only during the switching state or during the transition from the use state to the adjustment state and / or from the adjustment state to the use state.

[0155] exist Figure 21 Another embodiment of the suction and displacement device 1 according to the invention is shown in the figure, which illustrates that in Figures 3 to 10 An alternative to the implementation shown. Figure 21 A schematic perspective view shows a cut-off portion of the suction and displacement device 1 according to the invention in accordance with a fourth embodiment, wherein some components of the suction and displacement device 1 are omitted.

[0156] exist Figure 21 In the embodiment shown, the actuating element 16 is configured separately from the adjusting device 10. The fitting device 17 and the actuating element 16 are fixedly connected to each other.

[0157] The operating element 16 is configured to adjust the coupling device 10. The operating element 16 is accessible from the outside to the user of the suction / transfer device 1. The operating element 16 is arranged in a longitudinally movable manner, that is, in a manner movable along the longitudinal axis L of the suction / transfer device 1. The operating element 16 is configured such that adjustments to the coupling device 10 made by means of the operating element 16 can be made to switch between a use state and an adjustment state. In particular, the longitudinal movement of the operating element 16 causes the longitudinal movement of the fitting device 17. Here, the operating element 16 can be moved by the user from a first position to a second position along the longitudinal axis L of the suction / transfer device 1, wherein in the first position the coupling device 10 is in a use state, and in the second position the coupling device 10 is in an adjustment state.

[0158] In this embodiment, the reset force of the reset device 35 of the suction device 1 acts on the operating element 16 and the fitting device 17. The reset force of the reset device 35 prevents the operating element 16 from moving from the first position (use state) to the second position (adjustment state). If the user does not apply force to the operating element in the second position (e.g., if the user releases the operating element), then the reset force of the reset device 35 causes the operating element 16 to move longitudinally from the second position to the first position. Here, the fitting device 17 moves together with and synchronously with the operating element 16.

[0159] Figure 22 A schematic perspective view shows a cut-off portion of the suction-transfer device 1 according to the invention in a fifth embodiment, wherein some components of the suction-transfer device 1 are omitted. The suction-transfer device 1 is shown here in its operational state. In this operational state, the adjustment display 11 is decoupled from the adjustment device 10 and is not engaged with the coupling device 12. Adjustment of the adjustment display 11 should be avoided in this operational state. Therefore, it is stipulated here that the adjustment display 11 is fixed in the operational state, particularly stopped to prevent rotation about the longitudinal axis L of the suction-transfer device. For this purpose, the adjustment display 11 here has locking teeth 36 on its inner surface, and the actuating element 16 here has complementary locking teeth 37 on its outer surface. The actuating element 16 is movable along the longitudinal axis L of the suction-transfer device 1 to switch from the operational state to the adjustment state and vice versa. The actuating element 16 is configured in an anti-torsional manner relative to the longitudinal axis L of the suction-transfer device 1 and cannot rotate in the circumferential direction of the suction-transfer device 1, i.e., about the longitudinal axis L. By manipulating the operating element 16, the locking teeth 37 of the operating element 16 and the locking teeth 36 of the adjustment display 11 can engage and disengage. In use, the locking teeth 37 of the operating element 16 and the locking teeth 36 of the adjustment display 11 are engaged. In this state of use, this engagement prevents adjustment of the adjustment display 11, and in particular, rotation of the adjustment display 11 about the longitudinal axis L of the suction device 1. This engagement enables… Figure 22 This can be seen from the text.

[0160] Figure 23 A schematic perspective view shows the following according to Figure 22 The suction device 1 is in the adjustment state. If it is moved from the (first) position of the operating state (see...) by manipulating, in particular moving, the operating element 16... Figure 22 ) Transition to the (second) position of the adjustment state (see Figure 23Then, the locking teeth 37 of the operating element 16 disengages from the locking teeth 36 of the adjustment display 11. In the adjustment state, the adjustment display 11 can be adjusted, and in particular, can rotate around the longitudinal axis L of the suction device 1.

[0161] The various aspects of the invention described above can be implemented independently of each other, but also in any combination, and can be advantageous.

Claims

1. A suction device (1) for receiving and discharging fluid volumes, having - Displacement device (2), which has: • Extrusion device (3), and • Exclusion shell (4) - A drive device (5) for moving the expulsion device (3) within the expulsion housing (4), wherein, The movement of the expulsion device (3) is limited by the drive device (5) and / or the upper stop (6), lower stop (7) and at least one paired stop (8) of the expulsion device (3), thereby limiting the stroke of the expulsion device (3). - Volume display (9) for displaying the suction volume associated with or related to the stroke of the extrusion device (3), - Adjustment device (10), configured to change the stroke of the expulsion device (3), - Adjust the display (11), which is used to display the adjustment value of the stroke of the expulsion device (3), and - Coupling device (12), by means of said coupling device • In use, the adjustment device (10) is coupled to the volume display (9) and decoupled from the adjustment display (11), thereby operation of the adjustment device (10) causes a change in the volume display (9) but not a change in the adjustment display (11), and • In the adjustment state, the adjustment device (10) is coupled to the adjustment display (11) and decoupled from the volume display (9), thereby the operation of the adjustment device (10) causes a change in the adjustment display (11) but does not cause a change in the volume display (9).

2. The suction and transfer device (1) according to claim 1, wherein, In use and in adjustment, the adjusting device (10) is coupled to the upper stop (6), thereby the operation of the adjusting device (10) causes a change in the position of the upper stop (6), wherein the force applied to the adjusting device (10) is transmitted to the upper stop (6).

3. The suction device (1) according to claim 1 or 2, wherein, In the calibration state, the adjustment device (10) is coupled to the volume display (9) and decoupled from the upper stop (6) and from the adjustment display (11), thereby the operation of the adjustment device (10) causes a change in the volume display (9) but does not cause a change in the adjustment display (11) and does not cause a change in the position of the upper stop (6).

4. The suction device (1) according to claim 1 or 2, wherein, The coupling device (12) has: - At least one first coupling device (13) coupled to the adjustment device (10) and configured as a first gear. - At least one second coupling device (14) configured as a second gear, capable of being coupled to the volume display (9), and - At least one third coupling device (15) configured as a third gear that can be coupled to the adjustment display (11). The first coupling device (13), the second coupling device (14) and the third coupling device (15) are arranged in a manner that allows them to rotate about a common axis (A) of the coupling device (12) and to move along this common axis (A).

5. The suction device (1) according to claim 1 or 2, wherein, The adjustment display (11) has at least one digital wheel (11B) that is rotatable about the longitudinal axis (L) of the suction device (1) and displays a scale for the adjustment value of the stroke of the extrusion device (3).

6. The suction and transfer device (1) according to claim 1, wherein, The suction device (1) has an operating element (16) for adjusting the coupling device (12), wherein the adjustment of the coupling device (12) by means of the operating element (16) can realize the switching between the use state and the adjustment state.

7. The suction device (1) according to claim 6, wherein, The operating element (16) is configured separately from the adjustment device (10).

8. The suction device (1) according to claim 6, wherein, The regulating device (10) has the operating element (16). The adjusting sleeve (27) of the adjusting device (10) forms the operating element (16). The adjusting sleeve (27) is configured to rotate around the longitudinal axis (L) of the suction device (1) in order to change the stroke of the extrusion device (3) and to change the volume display (9). The adjusting sleeve (27) is capable of moving along the longitudinal axis (L) of the suction device (1) in order to adjust the coupling device (12) to a working state and / or an adjustment state. The adjusting sleeve (27) can be loosely fixed in different axial positions by means of the holding device (19) of the suction device (1).

9. The suction device (1) according to claim 8, wherein, The coupling device (12) has a fitting device (17) for changing the position of the coupling device (12), wherein the fitting device (17) is movable along the longitudinal axis (L) of the suction device (1). The fitting device (17) can be arranged in different end positions when driven by the manipulation element (16). The interlocking device (17) at least partially surrounds the second coupling device (14). The fitting device (17) and the actuating element (16) are integrally manufactured.

10. The suction device (1) according to claim 9, wherein, When moving between the endpoint positions, the spring force of the spring device (18) of the suction device (1) along a partial section of the path acts on the control element (16).

11. The suction device (1) according to claim 9, wherein, The adjusting sleeve (27) and the fitting device (17) are supported in a manner that allows them to rotate relative to each other and / or connected in a manner that allows them to move longitudinally.

12. The suction / transfer device (1) according to claim 9 or 11, wherein, In order to couple the fitting device (17) with the adjustment device (10), the fitting device (17) has a coupling element (20) and the adjustment device (10) has a mating coupling element (21), wherein the coupling element (20) and the mating coupling element (21) are configured such that rotational movement of the adjustment device (10) can be prevented when changing from the use state to the adjustment state and / or when changing from the adjustment state to the use state.

13. The suction device (1) according to any one of claims 1, 2, 6 to 11, for receiving and discharging fluid volumes, having - Displacement device (2), which has: • Extrusion device (3), and • Exclusion shell (4) - A drive device (5) for moving the expulsion device (3) within the expulsion housing (4), wherein, The movement of the expulsion device (3) is limited by the drive device (5) and / or the upper stop (6), lower stop (7), and at least one mating stop (8) of the expulsion device (3), thereby defining the stroke of the expulsion device (3). - Adjustment display (11) for displaying the adjustment value of the stroke of the expulsion device (3). In the adjustment state, the stroke of the expulsion device (3) can be adjusted, and the adjustment display (11) can be adjusted. In this configuration, the stroke of the expulsion device (3) is adjustable and the adjustment display (11) is fixed.

14. The suction / transfer device (1) according to claim 13, wherein, - The suction device (1) has an actuating element (16) for switching the suction device (1) from a use state to an adjustment state and vice versa. - The actuating element (16) for switching the suction device (1) from the use state to the adjustment state and vice versa is capable of moving along the longitudinal axis (L) of the suction device (1). - The actuating element (16) is configured to resist torsion relative to the longitudinal axis (L) of the suction device (1). - The adjustment display (11) has locking teeth (36), and the operating element (16) has complementary locking teeth (37). - By moving the operating element (16) along the longitudinal axis (L) of the suction device (1), the locking teeth (37) of the operating element (16) and the locking teeth (36) of the adjustment display (11) can engage and disengage. - In use, the locking teeth (37) of the operating element (16) are engaged with the locking teeth (36) of the adjustment display (11), and - In the adjustment state, the locking teeth (37) of the operating element (16) and the locking teeth (36) of the adjustment display (11) disengage and engage.

15. The suction / transfer device (1) according to claim 1, wherein, The extrusion device (2) is a piston-cylinder device, wherein the extrusion device (3) is a piston, and wherein the extrusion housing (4) is a cylinder.

16. The suction / transfer device (1) according to claim 1, wherein, The adjusting device (10) is configured to change the position of the upper stop (6).

17. The suction device (1) according to claim 6, wherein, The control element (16) used to adjust the coupling device (12) can be accessed from the outside.

18. The suction device (1) according to claim 8, wherein, The coupling device (12) has a fitting device (17) for axially moving the coupling device (12) along a common axis (A).

19. The suction / transfer device (1) according to claim 10, wherein, The spring device (18) is arranged at the actuating element (16) and / or the fitting device (17).

20. The suction device (1) according to claim 13, wherein, The extrusion device (2) is a piston-cylinder device, wherein the extrusion device (3) is a piston, and wherein the extrusion housing (4) is a cylinder.

21. The suction device (1) according to claim 13, wherein, In the adjustment state, the stroke of the expulsion device (3) can be adjusted and the adjustment display (11) can rotate around the longitudinal axis (L) of the suction device (1).

22. The suction device (1) according to claim 13, wherein, In use, the stroke of the expulsion device (3) is adjustable and the adjustment display (11) is stopped to prevent rotation about the longitudinal axis (L) of the suction device (1).

23. The suction device (1) according to claim 14, wherein, The manipulation element (16) can be accessed from the outside.

Images