# US 10,478,568 B2 · Low radial profile needle safety device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,478,568 B2 - Document ID: US10478568B2 - Status: Granted - Kind: B2 - Application number: 15/900,234 - Filed: 2018-02-20 - Published: 2018-09-27 - Granted: 2019-11-19 - Earliest claimed: 2012-03-07 - Assignees: West Pharmaceutical Services, Inc. - Applicants: West Pharmaceutical Services, Inc. - Inventors: Christopher Evans; Brian Costello; Christopher Gieda - Web page: https://patentgrep.com/patent/US10478568B2 ## CPC - A61M 5/3272: {having projections following labyrinth paths} - A61M 5/326: {Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user} - A61M 5/3204: {Needle cap removers, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices} - A61M 5/3257: {Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means} - A61M 5/46: having means for controlling depth of insertion - A61M 2005/3267: {Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body} - 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 A needle safety device has an outer tube within which a syringe barrel is slideably receivable. A collar in the outer tube is moveable relative thereto and rotatably attachable to the distal end of the barrel. A force member biases the outer tube in a distal direction. A track is formed in the inner surface of the outer tube. A pin extending radially outwardly from the collar slidingly engages the track. In a staging position, the barrel is inspectable. In a pre-injection position, the cannula extends a first length beyond the outer tube. In a full-insertion position, the cannula extends a second length greater than the first length beyond the outer tube. In a locked position, the cannula is entirely within the outer tube. ## Claims ### Claim 1 A needle safety device for an injection device having a generally cylindrical barrel with a distal end from which a cannula extends, the needle safety device comprising: an outer tube within which the barrel is slideably receivable, the outer tube having a distal end, a proximal end spaced from the distal end of the outer tube and a longitudinal axis; a collar positioned within the outer tube, moveable relative thereto and attachable to the distal end of the barrel; a force member positioned within the outer tube biasing the outer tube in a distal direction; a track formed in an inner surface of the outer tube; and a pin extending radially outwardly from the collar slidingly engaging the track, wherein the track comprises: a first track segment extending from a staging position to a pre-injection position, wherein the proximal end of the outer tube is in a position relative to the distal end of the barrel allowing the barrel to be inspected when the collar is attached to the distal end of the barrel and the pin is releaseably retained in the staging position by a first catch in the outer tube, and wherein the cannula extends a first length beyond the distal end of the outer tube when the collar is attached to the distal end of the barrel and the pin is releaseably retained in the pre-injection position by a second catch in the outer tube; a second track segment contiguous with the first track segment and extending from the pre-injection position to a full-insertion position, wherein the cannula extends a second length greater than the first length from the distal end of the outer tube when the collar is attached to the distal end of the barrel and the pin is in the full-insertion position; and a third track segment contiguous with the second track segment and extending from the full-insertion position to a locked position in which the pin is immovably retainable, a portion of the third track segment spaced from and parallel to a portion of the first track segment, wherein the cannula is entirely within the outer tube when the collar is attached to the distal end of the barrel and the pin is immovably retained in the locked position by a third catch in the outer tube. ### Claim 2 (depends on 1) The needle safety device according to claim 1, wherein the collar is a hollow cylinder terminating at a distal end with an annulus rotatably attachable to the distal end of the barrel. ### Claim 3 (depends on 1) The needle safety device according to claim 1, wherein the first track segment has an initial portion substantially parallel to the longitudinal axis of the outer tube followed by a final portion angled with respect to the longitudinal axis. ### Claim 4 (depends on 1) The needle safety device according to claim 1, wherein the second track segment is angled with respect to the longitudinal axis of the outer tube, has an arcuate profile and imparts both axial translation and rotation to the collar. ### Claim 5 (depends on 1) The needle safety device according to claim 1, wherein the third track segment has an initial portion substantially parallel to the longitudinal axis of the outer tube followed by an arcuate portion providing a cammed surface terminating in the third catch at the locked position. ### Claim 6 (depends on 1) The needle safety device according to claim 1, wherein the collar is a hollow cylinder terminating at a distal end with a plurality of spaced-apart fingers fixedly attachable to the distal end of the barrel. ### Claim 7 (depends on 1) The needle safety device according to claim 1, wherein the outer tube has a cut therethrough forming a flexible tongue having a radially disposed ramp. ### Claim 8 (depends on 1) The needle safety device according to claim 1, wherein the outer tube has a cut therethrough forming a flexible tongue having a radially disposed ramp in registry with the second catch and the first track segment has an initial portion substantially parallel to the longitudinal axis of the outer tube followed by a circumferential portion terminating at the second catch. ### Claim 9 (depends on 1) The needle safety device according to claim 1, wherein the second track segment is substantially parallel to the longitudinal axis of the outer tube. ### Claim 10 (depends on 1) The needle safety device according to claim 1, wherein the third track segment has an initial portion substantially parallel to the longitudinal axis of the outer tube, followed by a mid-portion having a first extent angled with respect to the longitudinal axis and a second extent parallel to the longitudinal axis, followed by a final portion having an arcuate profile providing a cammed surface terminating in the third catch at the locked position. ### Claim 11 (depends on 1) The needle safety device according to claim 1, wherein the outer tube moves only in axial translation without rotation when the cannula extends beyond the outer tube. ### Claim 12 (depends on 1) The needle safety device according to claim 1, wherein the force member is positioned within the outer tube between the collar and the distal end of the outer tube.