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Alan D. Langerud, Plymouth US

Alan D. Langerud, Plymouth, MN US

Patent application numberDescriptionPublished
20090108511Variable force spring - A variable force spring that includes an elongated, pre-stressed strip of retractable spring material that is formed into coils and having a variation in cross-sectional mass along the length. In one instance, the variation in cross-sectional mass along the length of the retractable spring is achieved by varying the width of the pre-stressed spring along its length.04-30-2009
20090112163Fluid delivery device with variable force spring - A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as antibiotics, blood clotting agents, analgesics, and like medicinal agents from collapsible containers at a uniform rate. The dispenser includes a novel stored energy source that is provided in the form of a compressible-expandable member that functions to continuously and uniformly expel fluid from the apparatus reservoir. The apparatus further includes a novel fluid flow control assembly that precisely controls the flow of the medicament solutions from the apparatus reservoir to the patient.04-30-2009
20100056998Two part fluid dispenser - A dispensing device for dispensing medicaments to a patient that is made up of first and second stand-alone, interconnectable assemblies. The first of these assemblies comprises a fluid reservoir assembly that houses a fluid reservoir defining component while the second assembly comprises a fluid delivery and control assembly that includes a novel flow control means that functions to control the flow of medicinal fluid from the fluid reservoir of the first assembly toward the patient via a plurality of fluid flow control passageways. Because the stand-alone fluid delivery and control assembly is initially totally separate from the fluid reservoir assembly of the apparatus, the fluid flow passageways of the fluid delivery and control assembly can be effectively sterilized using conventional gamma ray sterilization techniques without adversely affecting the medicament contained within the fluid reservoir of the apparatus.03-04-2010
20100222741Fluid delivery device with variable force spring - A compact fluid dispenser for use in controllably dispensing fluid medicaments such as antibiotics, blood clotting agents, analgesics, and like medicinal agents from collapsible containers at a uniform rate. The dispenser includes a novel stored energy source that is provided in the form of a compressible-expandable member that functions to continuously and uniformly expel fluid from the apparatus reservoir. The apparatus further includes a novel fluid flow control assembly that precisely controls the flow of the medicament solutions from the apparatus reservoir to the patient.09-02-2010
20100241074Fluid delivery device with variable force spring - A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as antibiotics, blood clotting agents, analgesics, and like medicinal agents from collapsible containers at a uniform rate. The dispenser includes a novel stored energy source that is provided in the form of a compressible-expandable member that functions to continuously and uniformly expel fluid from the apparatus reservoir. The apparatus further includes a novel fluid flow control assembly that precisely controls the flow of the medicament solutions from the apparatus reservoir to the patient.09-23-2010
20100312187Pain management dispenser - A dispensing device for dispensing pain management medicaments to a patient comprising first and second threadably interconnectable sub-assemblies. The first of these sub-assemblies houses a novel collapsible fluid reservoir defining component while the second comprises a fluid delivery and control assembly that includes a novel flow control means that functions to control the flow of medicinal fluid from the fluid reservoir of the collapsible reservoir defining component toward the patient via a plurality of fluid flow control passageways.12-09-2010
20110251556Fluid dispenser - A dispensing device for dispensing pain management medicaments to a patient comprises first and second threadably interconnectable sub-assemblies. The first of these sub-assemblies houses a fluid reservoir defining component while the second comprises a fluid delivery and control assembly that includes a novel flow control means that functions to control the flow of medicinal fluid from the fluid reservoir of the first sub-assembly toward the patient via strategically formed flow control passageways.10-13-2011
20110282300Apparatus for dispensing medicinal fluids and method of making same - A dispensing device and the method of making same for dispensing medicaments to a patient that includes a housing, a first assembly connected to the first end of the housing that includes a body portion, and a penetrating sub-assembly. The first assembly also includes a rate control chip of novel construction that is connected to the penetrating sub-assembly and functions to control the rate of flow of medicinal fluid to the patient. Disposed within the housing is a second assembly that includes a shuttle, a collapsible container carried by the shuttle and a plurality of variable force springs that function to thrust the collapsible container into penetrating engagement with the penetrating member of the penetrating assembly and then to collapse the collapsible container to deliver the medicinal fluid to the patient. Connected to the second end of the housing is a novel third assembly that includes an operating member that is threadably connected to the shuttle. The operating member functions to controllably move the shuttle forwardly of the housing. The apparatus also includes a novel locking mechanism that releasably locks the operating member against rotation relative to the shuttle.11-17-2011

Patent applications by Alan D. Langerud, Plymouth, MN US