Shaft arrangement having a shaft which extends within a fluid-filled casing
AssigneeEcp Entwicklungsgesellschaft Mbh
InventorReiner Liebing
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Abstract
In the case of a shaft arrangement having a shaft (7) which extends within a casing (1) filled with a fluid and which can be actuated by means of a drive (8) from outwith the casing (1), the shaft (7) having on its outer peripheral surface a surface structure which conveys the fluid in a flow direction (30) in the longitudinal direction of the shaft during rotation, a sleeve (19) is provided according to the invention, which can rotate with the shaft and has at least one conveying element (20) for conveying the fluid in a counterflow direction opposite to the flow direction. As a result, a bubble-free conveyance of the fluid along the shaft (7) is facilitated.
Claims16
Shaft arrangement having a shaft which extends within a casing filled with a fluid and which can be actuated by means of a drive, in particular from outwith the casing, the shaft having on its outer peripheral surface a surface structure which conveys the fluid in a flow direction in the longitudinal direction of the shaft during rotation, characterised by a sleeve which is disposed in the region of the shaft, which sleeve has at least one conveying element for conveying the fluid in a direction away from the flow direction, said sleeve at least partially located within said casing, said shaft extending through a helical shaft guide fixed in said casing to an expandable pump.
Shaft arrangement having a blood pump shaft which extends within a catheter filled with a fluid and which can be actuated by means of a drive at one end and having an expandable rotor for pumping blood at another end, in particular from outwith the catheter, the shaft having on its outer peripheral surface a surface structure which conveys the fluid in a flow direction in the longitudinal direction of the shaft during rotation, characterised by a sleeve which is disposed in the region of the shaft, surrounds the shaft and rotates with the latter, which sleeve has at least one conveying element for conveying the fluid in a counterflow direction opposite to the flow direction, wherein the catheter has an outlet for the fluid at the end thereof remote from the drive, said sleeve at least partially located within said catheter, said shaft extends through a helical shaft guide fixed in said catheter.
Shaft arrangement having a blood pump shaft which extends within a catheter filled with a fluid and which can be actuated by means of a drive at one end and having an expandable rotor for pumping blood at another end, in particular from outwith the catheter, the shaft having on its outer peripheral surface a surface structure which conveys the fluid in a flow direction in the longitudinal direction of the shaft during rotation, characterised by a sleeve which is disposed in a drive-side end region of the shaft, which sleeve has at least one conveying element for conveying the fluid in a counterflow direction opposite to the flow direction, wherein the catheter has an outlet for the fluid at the end thereof remote from the drive, said shaft extends through a helical shaft guide fixed in said catheter.
Dependencies are inferred from the claim text.