WO2011076441A1 - Conveying blades for a compressible rotor - Google Patents
Conveying blades for a compressible rotor Download PDFInfo
- Publication number
- WO2011076441A1 WO2011076441A1 PCT/EP2010/007998 EP2010007998W WO2011076441A1 WO 2011076441 A1 WO2011076441 A1 WO 2011076441A1 EP 2010007998 W EP2010007998 W EP 2010007998W WO 2011076441 A1 WO2011076441 A1 WO 2011076441A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strut
- section
- struts
- joint
- conveying blade
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/181—Axial flow rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/247—Vanes elastic or self-adjusting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/13—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/135—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel inside a blood vessel, e.g. using grafting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/165—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart
- A61M60/17—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart inside a ventricle, e.g. intraventricular balloon pumps
- A61M60/174—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable in, on, or around the heart inside a ventricle, e.g. intraventricular balloon pumps discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
- A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
- A61M60/414—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/80—Constructional details other than related to driving
- A61M60/802—Constructional details other than related to driving of non-positive displacement blood pumps
- A61M60/804—Impellers
- A61M60/806—Vanes or blades
- A61M60/808—Vanes or blades specially adapted for deformable impellers, e.g. expandable impellers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
- F04D29/606—Mounting in cavities
- F04D29/607—Mounting in cavities means for positioning from outside
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
Definitions
- Such pumps can be configured so small as micropumps in medical engineering, for example, that they can be introduced into blood vessels with microinvasiveness . They can then be used for assisting the pumping force of the human heart .
- they are often designed compressible and expandable so that they can be introduced in a compressed state through a blood vessel, for example up to and into a ventricle, and can be expanded there. Provision is often made for this purpose that a corresponding rotor of the pump which can be driven very fast in operation is radially changeable, i.e. compressible and expandable between the transport state and the operating state.
- a pump is known in WO 2006/051023 having a rotor which has two cover surfaces and centrifugal blades disposed therebetween.
- the cover surfaces are pivotably fastened to the hub by means of joints.
- a corresponding conveying blade has at least two struts as well as a membrane held between them in the expanded state of the rotor or in the elongated state of the struts, and the struts in turn each have at least one joint, in particular more than one joint, which allows an angling in one direction in a first movement plane and bounds an overelongation beyond an elongation angle, in
- the elongation angle can also be less than 180°, for example 170°, 160° or 180°, or more than 180°, for example 190°, 200° or 210°, if a strut is intended to be realized which is curved in the operating state.
- the elongation angle of mutually adjacent joints can be equal, but can also vary.
- a further deformation beyond the elongation angle can moreover be possible in operation by mechanical strain on the struts by a fluid counter-pressure while utilizing the elasticity of the strut sections and the inherent elasticity of the joint material, with the force required for a further deformation/elongation, however, rising steeply on a reaching of the elongation angle.
- the joint or joints are in this respect arranged over the length of the individual struts and are at least partly spaced apart from the hub such that they separate different sections of the struts from one another and allow the mutual angling of the individual sections .
- the conveying blade can thereby be easily folded or rolled up.
- At least one joint is spaced apart from a hub of the rotor, for example by at least the radios or twice the radius of the hub.
- All of the joints, or at least the majority of joints, are advantageously kinkable in the same direction of movement so that the total conveying blade can be rolled up.
- the conveying blade or the rotor to which it is fastened thus has a small radial extent and can thus easily be brought to the
- adjacent joints can also be able to be angled in opposite directions to enable a concertinalike folding together. It is important in this respect that all the joints of the struts are brought into a defined, elongated position by the fluid counter-pressure and are stabilized there.
- the named joints are generally advantageously, but not
- the rotor After being brought to the operating site/deployment site, the rotor can be driven so that the conveying blade or a plurality of conveying blades are erected by centrifugal forces and/or by a fluid counter- pressure which is adopted.
- the unfolding of the rotor can also be realized by elastic restoring forces in the joints.
- the elastic restoring forces can also become effective in combination with centrifugal forces or fluid counter-pressure.
- the active area of the conveying blade or conveying blades is thus increased so that the corresponding fluid pump has a good efficiency in operation.
- the respective joint can also be able to be elongated elastically some degrees beyond 180°, but advantageously no more than 200°.
- the conveying blade can thus, for example, react with elastic yielding to impact strains in operation.
- a plurality of joints for example two, more than five, more than ten or more than twenty joints, are advantageously provided at each of the struts to facilitate a smooth rolling up, folding up or
- the different struts can be mutually connected to one another by further struts which facilitate an opening of the conveying blades and can hold the membrane spanned. These connection struts can in turn be connected to the joints.
- At least two struts in particular also three struts, can advantageously be arranged parallel to one another or in fan shape starting from a common base.
- An ergonomically favorable conveying blade which can be fastened to a hub of a rotor can thus easily be designed from two or more struts.
- the conveying blade can, for example, have the form of an airplane propeller blade overall.
- the individual struts can advantageously start from a common point in the region of the hub, expand the conveying blade radially outwardly in the manner of a fan and, optionally, converge again radially
- struts are fastened to an arc segment in the region of the hub, for example to an arc segment of a circle or to an elliptical arc segment or to a ring which is outwardly fastened to the hub.
- Different arc segments of a circle of different conveying blades can then be combined to a circular ring which can easily be pushed onto a hub of a rotor.
- the first movement plane which corresponds to an expanded state of the rotor in the maximum elongated state of the joints extends parallel to a common plane of the struts or tangentially to the membrane spanned between the struts in the region of said struts.
- the conveying blade can easily be flipped together or folded together or rolled up in the plane of the membrane or tangentially to the membrane surface and can be rolled up around the hub in the compressed state of the rotor, for example in the peripheral direction.
- the first movement plane which corresponds to an expanded state of the rotor in the maximum elongated state of the struts extends substantially perpendicular to a common plane of the struts or extends perpendicular to the membrane spanned between the struts in the region of said struts.
- each of the conveying blades can be rolled up, flipped over or folded perpendicular to the plane of the blade surface so that the conveying blades can, for
- a folding together of the respective rotor can, for example, thereby take place or be supported in that the rotor is braked or is moved against the operating direction during pumping. Provision can be made that the joints are biased such that they are only held in the elongated state in operation by the fluid
- At least one joint has a support element at which at least one section of a strut is rotatably mounted and two adjacent sections are supported in the elongated state.
- the respective support element can be configured, for example, as a plate having a bearing block at which a respective section of a strut is mounted so that it is kinkable in a first direction with respect to the support element or with respect to a second section of the strut, but can only be angled in a second movement direction up to the elongation angle, for example, not substantially more than 180° into an elongated position of the strut.
- the respective section in each case abut the support element to bound the elongation movement either on the side of the bearing facing the second section or on the side of the bearing remote from the second section.
- the support element can advantageously be structured symmetrically with respect to a center plane between two sections mutually adjacent at the joint.
- the support element can moreover comprise a material which is more elastic than the material of the strut.
- the two mutually- adjacent sections are approximately parallel to one another and are supported on one another such that the first section is mounted in a bearing fastened to the second section and has a pivot lever on the one side of the bearing and a support lever on the oppositely disposed side of the bearing, with the support lever being supported at the second section in the elongated state.
- the pivot lever is freely pivotable and the support lever is distanced from the point at which it is supported at the second section in the elongated state .
- a first section of the strut is mounted at a second section of the strut in the bearing of a joint such that the two sections partly overlap in the longitudinal direction in the elongated position and that the first section has a pivot lever on a first side of the bearing and a support lever on the second side of the bearing, with the pivot lever being supported at the end of the second section in the elongated state.
- the pivot lever is in turn supported at the second section and is freely movable in the opposite direction in the elongated state .
- a further advantageous embodiment of the invention provides that a first section of the strut and a second section of the strut are arranged adjacent t one another at the end face in the elongated state and are connected to one another by means of an asymmetrical film hinge.
- the two sections can generally be kinked with respect to one another with respect to the angle enclosed between them by the provision of a film hinge. It is ensured by the asymmetrical design of the film hinge that the kinking is possible in a first direction, but is bounded in a second direction in the elongated state of the strut.
- the film hinge is arranged at the side of the strut disposed inwardly in the compressed state of the rotor and in the kinked state of the strut where the sections of the strut kinked with respect to one another include the smaller angle with one another and that each of the sections forms an abutment at the outwardly disposed side of the strut, with the abutments contacting one another in the elongated state of the strut.
- the inwardly disposed side of the strut means the side which has an angle less than 180° in the
- a corresponding film hinge can either comprise a different material than the sections and can be connected to both sections, for example by adhesive bonding, welding or other joining techniques, or the film hinge can comprise the same material as the sections and also be contiguous thereto in one piece.
- a cut-out at the outer side of the strut.
- a cut-out can, for example, be introduced by laser cutting, etching or other erosion techniques.
- the corresponding cut-out can be introduced as a straight section or also as a wedge-shaped cut-out or in another form. The size of the cut-out determines when the two sections of the strut abut one another at the outer side disposed opposite the film hinge on a movement of the strut in the elongation direction and thus bound an
- first and second sections of the strut are connected to one another at the end face by means of a joint section which comprises a material at the inner side of the strut at least up to the center plane of the strut which is more easily compressible than the material on the outer side of the strut.
- a separate joint section is then provided which has a different structure on the inner side and outer side of the strut, for example is comprised of different materials.
- the material on the inner side of the strut is advantageously easily compressible, at least more easily compressible than on the outer side of the strut.
- the material located at the outer side of the strut can be designed as stretchable, as hard as possible and non- compressible. With good compressibility, the material on the inner side of the strut (which is therefore more compressible than on the outer side) can be configured as highly tensile, for example can be reinforced through highly tensile fibers.
- the strut is coated on the outside in the joint region with a material which is harder than the material of the joint section .
- the invention also relates, in addition to a
- the invention furthermore also relates to a corresponding fluid pump, in particular to a blood pump for the medical area, which is equipped with a corresponding compressible rotor or compressible conveying blades in accordance with the invention .
- Fig. 1 generally, the use of a blood pump in
- Fig. 2 schematically, the structure of a conveying blade with three struts arranged in fan shape ;
- Fig. 3 the structure of a conveying blade with a base in the shape of a circle segment
- Fig. 4 a view of a rotor in expanded form
- FIG. 5 view of the rotor of Fig. 4 in compressed
- Fig. 6 a view of a further rotor in expanded form
- Fig. 7 a view of the rotor of Fig. 6 in compressed form
- Fig. 8 a schematic view of a joint of a strut
- FIG. 9 the joint of Fig. 8 in different states, schematically;
- Fig. 10 a further joint of a strut in a first
- Fig. 11 the joint of Fig. 10 in a second state
- Fig. 12 a joint of a strut which is provided in a joint section at which two sections are arranged at the end face;
- Fig. 13 a film hinge of a strut in a first state
- Fig. 14 the film hinge of Fig. 13 in a second
- Fig. 15 a further embodiment of a film hinge; and Fig. 16 the embodiment of a joint section at a
- Fig. 1 shows a heart pump 1 which is located at its deployment site in the interior of a ventricle 3 and has a rotor 2 which has conveying blades on a hub 10 and is arranged inside a pump housing 9.
- the pump housing 9 is located at the transition from a blood vessel 4 to the ventricle 3.
- the pump is able to suck blood out of the ventricle 3 and to convey it into the blood vessel 4.
- the pump 1 is arranged at the end of a hollow
- catheter 5 which is introduced through a sluice 8 into the body of a patient or into the blood vessel 4 and which accommodates a shaft 6 in its interior which can be driven at high speeds and is connected to the hub 10 within the pump.
- the shaft 6 is
- the pump 1 To transport the pump 1 through the blood vessel, it can be radially compressed in order then to be radially expanded after being brought into the ventricle 3 and to achieve a correspondingly improved efficiency or the desired pump performance.
- Fig. 2 shows by way of example a conveying blade 11 of the rotor 2 in accordance with the invention in which a membrane is spanned between three struts 12, 13, 14 and is fastened to the individual struts, for example, by means of adhesive bonding, welding or in a similar manner.
- the membrane can also be attached simply by dipping the struts into a liquid plastic, for example
- the struts 12, 13, 14 each have a plurality of joints 15, 16, 17 of which three or four are respectively shown at the individual struts.
- the struts 12, 13, 14 converge at their base at a point 37 in which they are fastened to a hub 10.
- Fig. 3 shows a modified construction of a conveying blade 11' with struts 12', 13', 14 ⁇ which each have joints 15', 16', 17' and which converge at a base 37' which is configured in the form of a segment of an arc of a circle and can be fastened to a
- Fig. 4 shows two conveying blades of which the upper one is marked by 11" and is shown in more detail.
- the two conveying blades are fastened radially opposite to one another, symmetrically at a hub 10.
- the conveying blade 11" has struts 12", 13" between which a membrane is spanned, with each of the struts as well as a third strut 14" disposed between them having joints 15", 16", 17" which are kinkable in the plane perpendicular to the surface of the conveying blade 11" or at the respective struts perpendicular to the membrane surface or to the tangent of the membrane surface .
- the individual conveying blades 11" can be folded onto the hub 10 in the axial direction thereof as is shown in Fig. 5 in the compressed state of the rotor with reference to the struts 12" and 13" .
- the struts 12", 13" are radially erected in operation by centrifugal forces by rotation of the hub, driven by the shaft 6 shown in Fig. 1.
- Fig. 6 shows a further rotor having two conveying blades of which the upper one is marked by 11" ' . It has struts 12 1 ' ' , 13 ' 1 ' , 14 1 1 ' which are provided with respective joints 15 ' ' ' , 16 1 ' 1 , 17 ' ' ' . The joints are each kinkable in a first movement
- the struts 12 1 ' ' , 13 ' 1 ' lie about the hub 10, as is shown in more detail in Fig. 7.
- Fig. 8 shows the construction of the joints in a first embodiment in more detail, with a support element 20 being shown in the form of a plate between two sections 18, 19 of a strut.
- the support element 20 has two bearing blocks 21, 22 which are shown in more detail in a side view in Fig 9 and in which a respective bearing shaft 21', 22' is journalled.
- the sections 18, 19 are rotatably journalled on the corresponding shafts.
- the section 19 is additionally shown by dashed lines in the overelongated position 19' on the right hand side of the support element 20 and the second is supported at this position at the point marked by 43 at the support element 20, whereby a further angling of the section 19 with respect to the section 18 is prevented .
- the section 19 on the right hand side is marked by 19" in the kinked position which is likewise shown by dashed lines.
- the corresponding strut is angled or folded with the sections 18, 19 in this kinked position so that the rotor adopts a compressed positio .
- Fig. 10 represents a further embodiment of the invention in which a support element has been
- the two sections 41, 42 partly cover one another in the elongated position in the longitudinal direction, with the section 42 having a pivot lever 43 and a support lever 44 at both sides of the bearing point 23 and with the pivot lever 43
- Fig. 11 the arrangement is shown with the two sections 41, 42 in a maximally elongated position, with the section 42' pivoted with respect to Fig. 10 being shown in the maximally overelongated position.
- the support lever 44 is supported against the section 41 in this position. A further overelongation of the strut which has the two sections 41, 42 is thus prevented.
- a strut having two sections 27, 28 which are connected to one another by a joint section 29 is shown schematically.
- Fig. 13 shows in more specific form a cut-out 30 in the form of a slit or incision which is introduced into the strut between the sections 27', 28'.
- Fig. 14 shows the strut of Fig. 13 in a kinked arrangement of the sections 27', 28', with the film hinge 31 lying on the inner side of the strut and the cut-out 30 on its outer side.
- the sections 27', 28' thus include a smaller angle on the inner side than on the outer side when the strut is angled.
- the sections on the inner side have an angle which amounts to a maximum of 180°, or only a little above it, for example to a maximum of 190°.
- FIG. 15 another form of the cut-out 32 is shown which does not follow a straight cut, but rather a more complicated shape and which thus provide a longer and more flexible film hinge.
- Such a complex cut-out 32 can be introduced, for example, by means of laser cutting or etching techniques or other erosive processing techniques.
- Fig. 16 represents another alternative in the
- the joint section between two sections 27 ' ' ' and 28' ' 1 is marked by 33.
- This joint section 32 has a material 34 on the inner side which can also extend over the center plane 45 of the corresponding strut up to the outer side of the strut which extends perpendicular to the plane of the drawing .
- a layer 35 is advantageously provided at the outer side of the strut, said layer being harder than the material 34 and above all being incompressible so that the strut cannot be angled toward the outer side and the overelongation of the strut is already prevented by the property of the material of the part
- the material 34 is advantageously easily
- a layer 36 is shown in Fig. 16 which can likewise be attached to the outer side of the strut instead of the layer 35, or additionally thereto, but is stretchable just like the material of the layer 35 so that, on the one hand, a kinking of the sections 27' ' ', 28' ' 1 toward the inner side of the strut is allowed, a kinking of the sections toward the outer side is, however, limited.
- a simple compressibility of a rotor for a fluid pump is achieved by the design in accordance with the invention of conveying blades or of a rotor for a fluid pump having the corresponding joints so that the conveying blades can be brought into the
- the described joints are of simple design, are simple to manufacture and are reliable and give the corresponding conveying blades a high flexibility.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Mechanical Engineering (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Vascular Medicine (AREA)
- Transplantation (AREA)
- External Artificial Organs (AREA)
- Reciprocating Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/261,319 US9314558B2 (en) | 2009-12-23 | 2010-12-23 | Conveying blades for a compressible rotor |
CN201080058800.9A CN102665786B (en) | 2009-12-23 | 2010-12-23 | Conveying blades for a compressible rotor |
DE112010004979T DE112010004979T5 (en) | 2009-12-23 | 2010-12-23 | Conveyor bucket for a compressible rotor |
US15/069,627 US10052419B2 (en) | 2009-12-23 | 2016-03-14 | Conveying blades for a compressible rotor |
US16/037,758 US10806838B2 (en) | 2009-12-23 | 2018-07-17 | Conveying blades for a compressible rotor |
US17/023,837 US11266824B2 (en) | 2009-12-23 | 2020-09-17 | Conveying blades for a compressible rotor |
US17/590,531 US11549517B2 (en) | 2009-12-23 | 2022-02-01 | Conveying blades for a compressible rotor |
US18/079,995 US11773863B2 (en) | 2009-12-23 | 2022-12-13 | Conveying blades for a compressible rotor |
US18/238,564 US20240052848A1 (en) | 2009-12-23 | 2023-08-28 | Conveying blades for a compressible rotor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28964509P | 2009-12-23 | 2009-12-23 | |
US61/289,645 | 2009-12-23 | ||
EP09075571A EP2338540A1 (en) | 2009-12-23 | 2009-12-23 | Delivery blade for a compressible rotor |
EP09075571.1 | 2009-12-23 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US15/069,627 Continuation US10052419B2 (en) | 2009-12-23 | 2016-03-14 | Conveying blades for a compressible rotor |
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2010
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- 2010-12-23 US US13/261,319 patent/US9314558B2/en active Active
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2016
- 2016-03-14 US US15/069,627 patent/US10052419B2/en active Active
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2018
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2020
- 2020-09-17 US US17/023,837 patent/US11266824B2/en active Active
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2022
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Also Published As
Publication number | Publication date |
---|---|
CN102665786A (en) | 2012-09-12 |
US10806838B2 (en) | 2020-10-20 |
US20240052848A1 (en) | 2024-02-15 |
US10052419B2 (en) | 2018-08-21 |
US11549517B2 (en) | 2023-01-10 |
US20210138228A1 (en) | 2021-05-13 |
US11266824B2 (en) | 2022-03-08 |
US11773863B2 (en) | 2023-10-03 |
US20120301318A1 (en) | 2012-11-29 |
EP2338540A1 (en) | 2011-06-29 |
US20230235746A1 (en) | 2023-07-27 |
US20160263298A1 (en) | 2016-09-15 |
DE112010004979T5 (en) | 2013-02-28 |
US20190099532A1 (en) | 2019-04-04 |
US9314558B2 (en) | 2016-04-19 |
CN102665786B (en) | 2015-06-10 |
US20220265991A1 (en) | 2022-08-25 |
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