# US 2015/0148748 A1 · System and method for drug delivery with a safety syringe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0148748 A1 - Document ID: US20150148748A1 - Status: Published application - Kind: A1 - Application number: 14/543,787 - Filed: 2014-11-17 - Published: 2015-05-28 - Earliest claimed: 2013-11-15 - Assignees: Credence Medsystems, Inc. - Applicants: Credence Medsystems, Inc. - Inventors: Alan E. Shluzas; Stephen H. Diaz; John F. Shanley; Jeff Tillack; Dan Thayer - Web page: https://patentgrep.com/patent/US20150148748A1 ## CPC - A61M 5/3221: {Constructional features thereof, e.g. to improve manipulation or functioning} - A61M 5/2466: {by piercing without internal pressure increase (A61M5/2429 takes precedence)} - A61M 5/322: {Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston (devices for protecting guide needles in combination with catheters A61M25/0612)} - A61M 5/3234: {Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user} - A61M 5/31513: {Piston constructions to improve sealing or sliding} - A61M 2005/2474: {with movable piercing means, e.g. ampoule remains fixed or steady} - A61M 2005/3231: {Proximal end of needle captured or embedded inside piston head, e.g. by friction or hooks} - A61M 2005/3241: {Needle retraction energy is accumulated inside of a hollow plunger rod} - 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)} ## Abstract One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially penetrated into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber; and an energy-storing member operatively coupled between the stopper member and the syringe body, the energy-storing member configured to facilitate retraction of the stopper member relative to the syringe body. ## Claims ### Claim 1 A system for injecting, comprising: a. a syringe body defining an interior medicine chamber; b. a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; c. a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; d. a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially penetrated into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber; and e. an energy-storing member operatively coupled between the stopper member and the syringe body, the energy-storing member configured to facilitate retraction of the stopper member relative to the syringe body. ### Claim 2 (depends on 1) The system of claim 1, wherein the plunger member comprises a plunger member body that defines an interior volume, and wherein the energy-storing member is housed substantially inside of the plunger member body interior volume. ### Claim 3 (depends on 2) The system of claim 2, further comprising a latch member operatively coupled to the plunger member and housed substantially within the plunger member body interior volume, the latch member being configured to have a first mechanical state wherein the latch member maintains the energy storing member in an energy-storing state, and a second mechanical state wherein the latch member allows the energy-storing member to release energy stored by the energy-storing member to assist in retraction of the stopper member relative to the syringe body. ### Claim 4 (depends on 3) The system of claim 3, wherein the latch member comprises triggering portion configured to extend outside of the plunger member body interior volume and operatively couple to the syringe body such that the energy-storing member may be automatically released when the plunger member and intercoupled stopper member reach a predetermined insertional position relative to the syringe body. ### Claim 5 (depends on 4) The system of claim 4, wherein the predetermined insertional position is one wherein the stopper is positioned in a full insertion state relative to the syringe body. ### Claim 6 (depends on 1) The system of claim 1, wherein the energy-storing member is a spring. ### Claim 7 (depends on 6) The system of claim 6, wherein the spring comprises a material selected from the group consisting of: stainless steel, carbon steel, beryllium copper alloy, nickel-titanium alloy, chrome-silicon alloy, and cobalt-nickel alloy. ### Claim 8 (depends on 6) The system of claim 6, wherein the spring comprises an elastomeric polymer. ### Claim 9 (depends on 8) The system of claim 8, wherein the elastomeric polymer is selected from the group consisting of: a styrenic polymer, a co-polyester polymer, polyurethane, polyamide, a polyolefin blend, a polyolefin alloy, a polyolefin plastomer, a polyolefin plastomer, and rubber. ### Claim 10 The system 1, wherein the energy-storing member comprises a solid pellet member. ### Claim 11 The system of claim of 10, wherein the solid pellet member is an elastomeric polymer selected from the group consisting of: a styrenic polymer, a co-polyester polymer, polyurethane, polyamide, a polyolefin blend, a polyolefin alloy, a polyolefin plastomer, a polyolefin plastomer, and rubber. ### Claim 12 (depends on 6) The system of claim 6, wherein the spring comprises a single generally helically-shaped coil. ### Claim 13 (depends on 6) The system of claim 6, wherein the spring comprises a plurality of generally helically-shaped coils. ### Claim 14 (depends on 13) The system of claim 13, wherein at least two of the coils comprising the plurality of generally helically-shaped coils are co-axially aligned. ### Claim 15 (depends on 13) The system of claim 13, wherein at least two of the coils comprising the plurality of generally helically-shaped coils are longitudinally parallel aligned. ### Claim 16 (depends on 14) The system of claim 14, wherein the co-axially aligned helically-shaped coils are also longitudinally parallel aligned. ### Claim 17 (depends on 16) The system of claim 16, wherein the co-axially and longitudinally parallel aligned helically-shaped coils are helically wound with opposite winding directions relative to each other to prevent coil interference upon compression of the coils. ### Claim 18 (depends on 1) The system of claim 1, wherein retraction of the plunger retracts the intercoupled stopper member and needle, such that at least a portion of the needle is withdrawn into the interior medicine chamber of the syringe body. ### Claim 19 (depends on 1) The system of claim 1, wherein the plunger member has a threaded tip, and a hollow recess. ### Claim 20 (depends on 19) The system of claim 19, wherein the plunger tip hollow recess is configured to allow the needle proximal end to fully penetrate the stopper. ### Claim 21 (depends on 1) The system of claim 1, wherein the syringe body comprises glass. ### Claim 22 (depends on 1) The system of claim 1 wherein the syringe body comprises polymer. ### Claim 23 (depends on 1) The system of claim 1 wherein the stopper member comprises butyl rubber. ### Claim 24 (depends on 3) The system of claim 3 wherein the latch comprises a polymer selected from the group consisting of: polyetherimide, peek, and polyamide. ### Claim 25 (depends on 1) The system of claim 1 wherein the plunger comprises a polymer selected from the group consisting of: polyetherimide, peek, and polyamide. ### Claim 26 A system for injecting, comprising: a. a syringe body defining an interior medicine chamber; b. a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; c. a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; and d. a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber; wherein the stopper member is configured to be at least partially pierced by a sharpened proximal end of the needle, and wherein the needle has at least one anchoring element configured to resist pullout subsequent to being at least partially pierced into the stopper member. ### Claim 27 (depends on 26) The system of claim 26, wherein the at least one anchoring element is formed from a piece of sheet stock material. ### Claim 28 (depends on 27) The system of claim 27, wherein the at least one anchoring element is selected from the group consisting of: a barb, a skive cut, hook geometry, and an arrowhead geometry. ### Claim 29 (depends on 26) The system of claim 26, wherein the stopper has an outer geometry selected to substantially match an inner geometry of the syringe body to substantially seal with the syringe body. ### Claim 30 (depends on 26) The system of claim 26, wherein the stopper comprises an elastomeric material selected from the group consisting of: chlorobutyl rubber, bromobutyl rubber, and silicon rubber. ### Claim 31 (depends on 26) The system of claim 26, further comprising a sealant coating applied to at least a portion of the stopper to isolate medicine materials from the stopper. ### Claim 32 (depends on 31) The system of claim 31, wherein the sealant coating comprises a PTFE film. ### Claim 33 (depends on 26) The system of claim 26, further comprising a lubricant layer introduced between the stopper and the syringe body. ### Claim 34 (depends on 33) The system of claim 33, wherein the lubricant layer comprises silicon oil. ### Claim 35 (depends on 26) The system of claim 26, wherein a distal portion of the stopper member comprises a conventional off-the-shelf compliant stopper. ### Claim 36 (depends on 35) The system of claim 35, wherein the stopper member comprises an unmodified solid compliant member with no recesses or projections for coupling to a needle. ### Claim 37 (depends on 6) The system of claim 6, wherein the plunger member has a threaded tip, and a hollow recess. ### Claim 38 (depends on 37) The system of claim 37, wherein the plunger tip hollow recess is configured to allow the needle proximal end to fully penetrate the stopper. ### Claim 39 (depends on 26) The system of claim 26, wherein the syringe body comprises glass. ### Claim 40 (depends on 26) The system of claim 26, wherein the syringe body comprises a polymer. ### Claim 41 (depends on 27) The system of claim 27, wherein the sheet stock material comprises a metal selected from the group consisting of: stainless steel, cobalt-chrome alloy, and titanium. ### Claim 42 (depends on 26) The system of claim 26, wherein the needle defines a drug passageway therethrough having a proximal entrance which is located distal to a distal end of the stopper member when the sharpened proximal end of the needle is penetrated into the stopper member.