System and method for safety syringe
Inventors
Diaz, Stephen H. • Tillack, Jeff • Shluzas, Alan E. • Shanley, John F. • Thayer, Dan • Steese-Bradley, Gary • Merhige, John
Assignees
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Publication Number
US-11844931-B2
Publication Date
2023-12-19
Expiration Date
Abstract
A system for serially injecting liquids includes a syringe body, proximal and distal stopper members disposed in the syringe body, a first liquid in a distal chamber, a second liquid in a proximal chamber, a plunger member, and a needle hub assembly coupled to a distal needle interface of the syringe body. The plunger member includes a needle retention feature disposed in a plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior. The needle assembly includes a needle having a needle proximal end feature, a hub, and a needle latching member configured to couple the needle to the hub. Manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid, then the second liquid. The needle is at least partially retractable into plunger interior.
Core Innovation
A system for serially injecting liquids includes a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body. A proximal stopper member and a distal stopper member are disposed in the syringe body to form a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body. The system has a first liquid in the distal chamber and a second liquid in the proximal chamber.
A plunger member is configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body. A hub assembly coupled to the distal interface includes a transfer pipe with a transfer pipe proximal end and a transfer pipe distal end, a hub, and a connector fluidly coupled to the transfer pipe distal end. Manipulating the plunger member to insert the proximal stopper member distally initially expels the first liquid from the distal chamber through the transfer pipe, and then serially expels the second liquid from the proximal chamber through the transfer pipe.
The transfer pipe defines a transfer pipe interior, a distal end opening at the transfer pipe distal end, a middle opening, and a proximal opening, where the distal end opening, the middle opening, and the proximal opening are fluidly coupled through the transfer pipe interior. A distance between the proximal opening and the distal end of the syringe body is substantially equal to a length of the distal stopper member so that when the distal stopper member is inserted to the distal end of the syringe body, the proximal stopper member is inserted distally relative to the transfer pipe to position the proximal opening in the proximal chamber.
In an injection configuration, the proximal opening can be disposed in the distal chamber and in another injection configuration the proximal opening can be disposed in the proximal chamber, with the distal stopper member obstructing the middle opening when the system is in the second injection configuration. The distal stopper member also has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, including a bent wire or an annealed stainless alloy, and the transfer pipe proximal end comprises a transfer pipe proximal end feature having an angle of about 30 degrees.
Claims Coverage
The independent claims are clm-00001, clm-00021, clm-00022, clm-00024, clm-00025, and clm-00026. Across these claims, the coverage centers on serial expulsion of a first liquid and then a second liquid through a transfer pipe using proximal and distal stopper members, with transfer-pipe opening relationships, multiple injection configurations, and detent-related constraints.
Dual-chamber syringe with proximal and distal stopper members and sequential expulsion
A system for serially injecting liquids including a syringe body with a proximal opening and a distal interface, a proximal stopper member and a distal stopper member forming a proximal chamber and a distal chamber, a first liquid in the distal chamber, a second liquid in the proximal chamber, and a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body.
Hub assembly with transfer pipe directing serial expulsion through a connector
A hub assembly coupled to the distal interface including a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end, a hub, and a connector fluidly coupled to the transfer pipe distal end, wherein manipulating the plunger member initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe.
Transfer pipe openings coordinated with stopper insertion distance
A transfer pipe defines a transfer pipe interior, a distal end opening, a middle opening, and a proximal opening fluidly coupled through the transfer pipe interior, and a distance between the proximal opening and the distal end of the syringe body is substantially equal to a length of the distal stopper member such that when the distal stopper member is inserted to the distal end of the syringe body, the proximal stopper member is inserted distally relative to the transfer pipe to position the proximal opening in the proximal chamber.
Two injection configurations with proximal opening location and middle-opening obstruction
A first injection configuration wherein the proximal opening is disposed in the distal chamber, and a second injection configuration wherein the proximal opening is disposed in the proximal chamber, with the distal stopper member obstructing the middle opening when the system is in the second injection configuration.
Detent resisting transfer pipe proximal end passage with a force range
A distal stopper member has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, and the resistance is overcome by about 2 lbs. to about 5 lbs. of distally directed force applied to the plunger member.
Detent structure and transfer pipe proximal end feature
A distal stopper member has a detent to resist passage of the transfer pipe proximal end through the distal stopper member, wherein the detent comprises a bent wire or an annealed stainless alloy, and the transfer pipe proximal end comprises a transfer pipe proximal end feature having an angle of about 30 degrees.
Collectively, the independent claims cover a serial liquid-injection system using proximal and distal stopper members that form proximal and distal chambers, a manually manipulated plunger that first expels a first liquid from the distal chamber and then serially expels a second liquid from the proximal chamber through a shared transfer pipe. The claims are further defined by transfer-pipe opening coordination with stopper positions to enable multiple injection configurations and by detent-related structures and resistance constraints.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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