# US 10,117,989 B2 · Syringe type pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,117,989 B2 - Document ID: US10117989B2 - Status: Granted - Kind: B2 - Application number: 14/738,995 - Filed: 2015-06-15 - Published: 2015-10-01 - Granted: 2018-11-06 - Earliest claimed: 2015-06-15 - Assignees: PharmaSens AG - Applicants: PharmaSens AG - Inventors: Pual Hadvary; Hansjorg Tschirky - Web page: https://patentgrep.com/patent/US10117989B2 ## CPC - A61M 5/14216: {Reciprocating piston type} - A61B 5/0004: {characterised by the type of physiological signal transmitted} - A61B 5/145: Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value {; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue} (non-radiation detecting or locating of foreign bodies in blood A61B5/06) - A61B 5/150229: {Pumps for assisting the blood sampling} - A61B 5/4839: {combined with drug delivery} - A61M 5/14248: {of the skin patch type} - A61M 5/1452: {pressurised by means of pistons} - A61M 5/1454: {spring-actuated, e.g. by a clockwork} - A61M 5/1723: {using feedback of body parameters, e.g. blood sugar or pressure} - A61M 5/3287: {Accessories for bringing the needle into the body; Automatic needle insertion (A61M5/20, A61M5/31525 take precedence)} - A61M 5/3129: {Syringe barrels (A61M5/3205, A61M5/50 take precedence)} - A61M 2005/14252: {with needle insertion means} - A61M 2005/31518: {designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members} - A61M 2205/50: with microprocessors or computers - 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)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract The subcutaneous injection device contains a pump and a mechanism for inserting a cannula into the patient's skin. The cannula is fixedly positioned relative to the pump and the insertion mechanism has a flexible surface adhering to the skin. The flexible surface is positioned relative to the cannula in such a way that in a first position the tip of the cannula is concealed by the surface and in a second position the cannula is exposed beyond the surface. The insertion mechanism brings the surface from the first to the second position, thereby pulling the skin against the tip of the cannula. ## Claims ### Claim 1 A device for subcutaneous injection of fluid into a patient's skin, comprising: a casing to house a pump; a cannula having a tip for insertion into the patient's skin, the cannula being fixed in a position relative to the pump; a flexible base plate, the base plate fixed to the casing and including (1) a pre-stressed convex position in which the tip of the cannula is concealed, and (2) a released flat position in which the tip of the cannula is exposed beyond the base plate; and an adhesive layer fixed to a central region of the flexible base plate and extending without interruption towards an outer portion of the flexible base plate to adhere the base plate onto the patient's skin, wherein when moving from the pre-stressed convex position to the released flat position, a portion of the base plate which is moving pulls the skin which is adhered to the base plate so that the patient's skin moves against and is pierced by the tip of the cannula, wherein when the device is in (1) the pre-stressed convex position, a tip of the cannula is contained within the device, wherein when the device is in (2) the released flat position, the tip of the cannula is exposed beyond the baseplate, and wherein as the device transitions from (1) the pre-stressed convex position to (2) the released flat position, the cannula moves from being contained within the device to being exposed beyond the base plate such that a tip of the cannula is outside of the device. ### Claim 2 (depends on 1) The device according to claim 1 wherein the pump is a circular syringe pump. ### Claim 3 (depends on 1) The device according to claim 1 wherein the device includes more than one cannula for insertion into the skin simultaneously by a single cannula insertor. ### Claim 4 (depends on 1) The device according to claim 1 further comprising: a cannula insertor, the cannula insertor actuates the piercing of a septum before insertion into the skin. ### Claim 5 (depends on 1) The device according to claim 1 wherein the device comprises more than one pump for delivery of injection fluid into the patient. ### Claim 6 (depends on 1) The device according to claim 1 wherein the adhesive layer is temporarily worn by the patient. ### Claim 7 (depends on 6) The device according to claim 6 wherein a surface of the flexible base plate is smaller than a surface of the adhesive layer. ### Claim 8 (depends on 1) The device according to claim 1 wherein the flexible base plate is elastic for rapid movement between the pre-stressed convex position and the released flat position. ### Claim 9 (depends on 1) The device according to claim 1 wherein the device is applied to the skin using a functional package with a rim pressing the adhesive layer towards the skin.