# US 8,771,164 B2 · Fluid pumping ventricular assist device and components with static seal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,164 B2 - Document ID: US8771164B2 - Status: Granted - Kind: B2 - Application number: 13/739,416 - Filed: 2013-01-11 - Published: 2013-08-22 - Granted: 2014-07-08 - Earliest claimed: 2008-03-28 - Assignees: Vitalmex Internacional S.A. De C.V. - Applicants: Vitalmex Internacional S.A de C.V - Inventors: Francisco Javier Tovar Lopez - Web page: https://patentgrep.com/patent/US8771164B2 ## CPC - A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices - A61M 60/178: drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices - A61M 60/268: the displacement member being flexible, e.g. membranes, diaphragms or bladders - A61M 60/427: the force acting on the blood contacting member being hydraulic or pneumatic - A61M 60/827: Sealings between moving parts - A61M 60/896: having flexible or resilient parts, e.g. flap valves - Y10T 29/49236: Fluid pump or compressor making - Y10T 29/49826: Assembling or joining - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A ventricular assist device (VAD) having static seal structure for a pump housing which includes a support structure, a first sealing element, and a second sealing element. The support structure circumscribes a pump chamber and includes a first sealing surface, an opposing second sealing surface, and a fluid transfer end interposed between the sealing surfaces. The support structure provides a fluid flow path running through the fluid transfer end and into the pump chamber via an inlet bore and from the pump chamber back through the fluid transfer end via an outlet bore. The first sealing element is disposed on the first sealing surface, and the second sealing element is disposed on the second sealing surface. The sealing elements are configured for forming sealing interfaces in the pump housing, establishing a static seal that isolates the pump chamber from an environment external to the fluid pump housing. ## Claims ### Claim 1 A static seal structure for a medical device fluid pump housing, comprising: a support structure circumscribing a pump chamber, the support structure including a first sealing side, a second sealing side opposite to the first sealing side, a first opening located at the first sealing side, a second opening located at the second sealing side, a first sealing surface circumscribing the first opening, a second sealing surface circumscribing the second opening; a first sealing element disposed on the first sealing surface; and a second sealing element disposed on the second sealing surface, wherein the first sealing element and the second sealing element are configured for forming sealed interfaces between the support structure and surfaces of the fluid pump housing when assembled in the fluid pump housing. ### Claim 2 (depends on 1) The static seal structure of claim 1, wherein the support structure further includes a fluid transfer end interposed between the first sealing side and the second sealing side, a fluid inlet bore formed through the fluid transfer end, and a fluid outlet bore formed through the fluid transfer end, wherein the support structure provides a fluid flow path running through the fluid transfer end and into the pump chamber via the fluid inlet bore and from the pump chamber back through the fluid transfer end via the fluid outlet bore. ### Claim 3 (depends on 2) The static seal structure of claim 2, wherein the fluid inlet bore is disposed about an inlet axis, and the fluid outlet bore is disposed about an outlet axis parallel to the inlet axis. ### Claim 4 (depends on 2) The static seal structure of claim 2, wherein the fluid inlet bore is disposed about an inlet axis, and the fluid outlet bore is disposed about an outlet axis non-parallel to the inlet axis. ### Claim 5 (depends on 2) The static seal structure of claim 2, further including an inlet tubing connector attached to the fluid inlet bore, and an outlet tubing connector attached to the fluid outlet bore. ### Claim 6 (depends on 1) The static seal structure of claim 1, wherein the first sealing element is parallel to the second sealing element. ### Claim 7 (depends on 1) The static seal structure of claim 1, wherein the first sealing element is non-parallel to the second sealing element. ### Claim 8 (depends on 1) The static seal structure of claim 1, wherein the first sealing element and the second sealing element are each configured as a continuous loop of material. ### Claim 9 (depends on 1) The static seal structure of claim 1, wherein the first sealing surface and the second sealing surface are continuous surfaces. ### Claim 10 A medical device fluid pump housing, comprising: a support structure circumscribing a pump chamber, the support structure including a first sealing side, a second sealing side opposite to the first sealing side, a first opening located at the first sealing side, a second opening located at the second sealing side, a first sealing surface circumscribing the first opening, and a second sealing surface circumscribing the second opening; a first sealing element disposed on the first sealing surface; a second sealing element disposed on the second sealing surface; a first housing section contacting the first sealing element and covering the first opening; and a second housing section contacting the second sealing element and covering the second opening, wherein the support structure, the first sealing element, the second sealing element, the first housing section, and the second housing section cooperatively fluidly seal the pump chamber from an environment external to the fluid pump housing, with the first sealing element forming a sealed interface between the first housing section and the support structure and the second sealing element forming a sealed interface between the second housing section and the support structure. ### Claim 11 (depends on 10) The medical device fluid pump housing of claim 10, wherein the support structure further includes a fluid transfer end interposed between the first sealing side and the second sealing side, a fluid inlet bore formed through the fluid transfer end, and a fluid outlet bore formed through the fluid transfer end, wherein the support structure provides a fluid flow path running through the fluid transfer end and into the pump chamber via the fluid inlet bore and from the pump chamber back through the fluid transfer end via the fluid outlet bore. ### Claim 12 (depends on 11) The medical device fluid pump housing of claim 11, further including an inlet tubing connector attached to the fluid inlet bore, and an outlet tubing connector attached to the fluid outlet bore. ### Claim 13 (depends on 10) The medical device fluid pump housing of claim 10, wherein a gas inlet is formed in at least one of the first housing section and the second housing section, the gas inlet fluidly communicating with the pump chamber and configured for connection to a gas conduit. ### Claim 14 (depends on 10) The medical device fluid pump housing of claim 10, wherein the second housing section is secured to the first housing section using fasteners so as to form a housing in which the support structure is fitted. ### Claim 15 A medical device fluid pump, comprising: a support structure circumscribing a pump chamber, the support structure including a first sealing side, a second sealing side opposite to the first sealing side, a first opening located at the first sealing side, a second opening located at the second sealing side, a first sealing surface circumscribing the first opening, a second sealing surface circumscribing the second opening, a fluid transfer end interposed between the first sealing side and the second sealing side, a fluid inlet bore formed through the fluid transfer end, and a fluid outlet bore formed through the fluid transfer end; a first sealing element disposed on the first sealing surface; a second sealing element disposed on the second sealing surface; a first housing section contacting the first sealing element and covering the first opening; a second housing section contacting the second sealing element and covering the second opening; and a pump unit disposed in the pump chamber, the pump unit including a pump inlet fluidly communicating with the fluid inlet bore and a pump outlet fluidly communicating with the fluid outlet bore, wherein the support structure, the first sealing element, the second sealing element, the first housing section, and the second housing section cooperatively fluidly seal the pump chamber and the pump unit from an environment external to the fluid pump housing, with the first sealing element forming a sealed interface between the first housing section and the support structure and the second sealing element forming a sealed interface between the second housing section and the support structure. ### Claim 16 (depends on 15) The medical device fluid pump of claim 15, wherein the pump unit comprises a sac adapted for pumping blood. ### Claim 17 (depends on 15) The medical device fluid pump of claim 15, wherein at least a portion of the pump unit is deformable for establishing a pulsed flow of fluid from the pump inlet to the pump outlet. ### Claim 18 (depends on 15) The medical device fluid pump of claim 15, further including a one-way inlet valve connected to the pump inlet and a one-way outlet valve connected to the pump outlet. ### Claim 19 (depends on 18) The medical device fluid pump of claim 18, wherein the one-way inlet valve and the one-way outlet valve are each configured as a hinge-less valve including a plurality of flexible portions movable between an open position and a closed position. ### Claim 20 (depends on 18) The medical device fluid pump of claim 18, further including an inlet tubing connector interconnecting the fluid inlet bore and the one-way inlet valve, and an outlet tubing connector interconnecting the fluid outlet bore and the one-way outlet valve.