# US 2017/0281872 A1 · Dual-Dose Syringe System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0281872 A1 - Document ID: US20170281872A1 - Status: Published application - Kind: A1 - Application number: 15/478,006 - Filed: 2017-04-03 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Inventors: Frank Guthart - Web page: https://patentgrep.com/patent/US20170281872A1 ## CPC - A61M 5/31501: {Means for blocking or restricting the movement of the rod or piston (A61M5/5013 takes precedence)} - A61M 5/31505: {Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit} - A61M 5/31511: {Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence)} - A61M 5/31593: {Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir} - A61M 5/31595: {Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking} - A61M 2005/31508: {provided on the piston-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 An dual-dose syringe system is an apparatus that includes a tubular housing and a plunger. The tubular housing attaches onto a variety of syringe and needle assemblies and mounts the plunger within the syringe. The tubular housing prevents the plunger from simply traversing into the syringe. The tubular housing includes a first lateral-half portion and a second lateral half-portion that snaps onto each other and encloses a syringe. The tubular housing further includes a key slot that engages the plunger. The plunger includes a plurality of cross bars that predetermine two doses. Each of the plurality of cross bars is positioned perpendicular to a corresponding adjacent bar, forcing a user to purposefully twist the plunger in order to administer a dose. The apparatus further includes at least one spring-loaded barb that prevents the reuse of the apparatus. ## Claims ### Claim 1 A dual-dose syringe system comprises: a tubular housing; a plunger; the tubular housing comprises a closed end, an open end, a first lateral half-portion, a second lateral half-portion, and a key slot; the plunger comprises a stopper, a shaft, a sealing body, and a plurality of cross bars; the first lateral half-portion and the second lateral half-portion being detachably attached to each other; the key slot traversing through the closed end along a central axis of the tubular housing; the shaft being slidably engaged through the key slot; the sealing body being positioned within the tubular housing; the sealing body being terminally connected to the shaft; the stopper being connected along the shaft, offset from the sealing body; each of the plurality of cross bars being connected perpendicular to the shaft; the plurality of cross bars being distributed along the shaft between the sealing body and the stopper; and each of the plurality of cross bars being positioned perpendicular to a corresponding adjacent bar from the plurality of cross bars. ### Claim 2 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: the tubular housing further comprises a first flange-receiving hole and a second flange-receiving hole; the first flange-receiving hole traversing into the first lateral half-portion, adjacent to the closed end; the second flange-receiving hole traversing into the second lateral half-portion, adjacent to the closed end; the first flange-receiving hole and the second flange-receiving hole being positioned perpendicular to the central axis; and the first flange-receiving hole and the second flange-receiving hole being diametrically opposed to each other about the tubular housing. ### Claim 3 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: the plunger further comprises a knob; the knob being positioned external to the tubular housing; and the knob being terminally connected to the shaft, opposite the sealing body. ### Claim 4 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: the plurality of cross bars being centrally positioned with the shaft; and the plurality of cross bars and the key slot being coextensive. ### Claim 5 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: at least one spring-loaded barb; the at least one spring-loaded barb being laterally mounted to the shaft; and the at least one spring-loaded barb being positioned in between a last bar and the stopper, wherein the last bar is one of the plurality of cross bars and is positioned adjacent to the stopper. ### Claim 6 (depends on 5) The dual-dose syringe system as claimed in claim 5 comprises: the at least one spring-loaded barb comprises a first spring-loaded barb and a second spring-loaded barb; and the first spring-loaded barb and the second spring-loaded barb being diametrically opposed to each other about the shaft. ### Claim 7 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: the plurality of cross bars comprises a first cross bar, a second cross bar, and a third cross bar; the first cross bar being positioned adjacent the sealing body; the third cross bar being positioned adjacent the stopper; and the second cross bar being positioned between the first cross bar and the third cross bar. ### Claim 8 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: each of the plurality of cross bars comprises a rounded lateral portion; and the rounded lateral portion being oriented towards the sealing body. ### Claim 9 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: a first clamping jaw; a second clamping jaw; the first clamping jaw being mounted within the first lateral-half portion, adjacent to the open end; and the second clamping jaw being mounted within the second lateral-half portion, adjacent to the open end. ### Claim 10 (depends on 1) The dual-dose syringe system as claimed in claim 1 comprises: a grasping flange; and the grasping flange being laterally mounted about the tubular housing, adjacent to the closed end. ### Claim 11 A dual-dose syringe system comprises: a tubular housing; a plunger; a knob; at least one spring-loaded barb; the tubular housing comprises a closed end, an open end, a first lateral half-portion, a second lateral half-portion, and a key slot; the plunger comprises a stopper, a shaft, a sealing body, and a plurality of cross bars; the first lateral half-portion and the second lateral half-portion being detachably attached to each other; the key slot traversing through the closed end along a central axis of the tubular housing; the shaft being slidably engaged through the key slot; the sealing body being positioned within the tubular housing; the sealing body being terminally connected to the shaft; the stopper being connected along the shaft, offset from the sealing body; each of the plurality of cross bars being connected perpendicular to the shaft; the plurality of cross bars being distributed along the shaft between the sealing body and the stopper; and each of the plurality of cross bars being positioned perpendicular to a corresponding adjacent bar from the plurality of cross bars. the knob being positioned external to the tubular housing; and the knob being terminally connected to the shaft, opposite the sealing body. the at least one spring-loaded barb being laterally mounted to the shaft; and the at least one spring-loaded barb being positioned in between a last bar and the stopper, wherein the last bar is one of the plurality of cross bars and is positioned adjacent to the stopper. ### Claim 12 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: the tubular housing further comprises a first flange-receiving hole and a second flange-receiving hole; the first flange-receiving hole traversing into the first lateral half-portion, adjacent to the closed end; the second flange-receiving hole traversing into the second lateral half-portion, adjacent to the closed end; the first flange-receiving hole and the second flange-receiving hole being positioned perpendicular to the central axis; and the first flange-receiving hole and the second flange-receiving hole being diametrically opposed to each other about the tubular housing. ### Claim 13 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: the plurality of cross bars being centrally positioned with the shaft; and the plurality of cross bars and the key slot being coextensive. ### Claim 14 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: the at least one spring-loaded barb comprises a first spring-loaded barb and a second spring-loaded barb; and the first spring-loaded barb and the second spring-loaded barb being diametrically opposed to each other about the shaft. ### Claim 15 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: the plurality of cross bars comprises a first cross bar, a second cross bar, and a third cross bar; the first cross bar being positioned adjacent the sealing body; the third cross bar being positioned adjacent the stopper; and the second cross bar being positioned between the first cross bar and the third cross bar. ### Claim 16 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: each of the plurality of cross bars comprises a rounded lateral portion; and the rounded lateral portion being oriented towards the sealing body. ### Claim 17 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: a first clamping jaw; a second clamping jaw; the first clamping jaw being mounted within the first lateral-half portion, adjacent to the open end; and the second clamping jaw being mounted within the second lateral-half portion, adjacent to the open end. ### Claim 18 (depends on 11) The dual-dose syringe system as claimed in claim 11 comprises: a grasping flange; and the grasping flange being laterally mounted about the tubular housing, adjacent to the closed end.