US 10,576,199 B2Granted

System and method for a syringe micro pump with wave spring

AssigneeRepro-Med Systems, Inc.

InventorsAndrew I Sealfon, Siavash Gheshmi

Life of this patent

Estimating the term…

Loading patent…

Abstract

Provided is a system and method for a removable syringe micro pump. The removable syringe micro pump includes a pump housing having a first end and opposite thereto an attaching end, and at least one sidewall there between, the housing having a base proximate to the first end and, the attaching end having an attacher structured and arranged to temporarily engage a syringe. At least one wave spring is nested within the housing and attached proximate to the base. The wave spring having has a compressed first position wherein the wave spring is disposed within the pump housing, and a second extended position wherein, the release of tension extends the spring normally away from the pump housing. The wave spring has a diameter pre-selected to pass within a barrel of the engaged syringe. And engage a plunger seal of the syringe. An associated method of use is also provided.

Claims38

Dependent claims

A system for a removable syringe micro pump with at least one wave spring, comprising:

a pump housing having a first end and opposite thereto an attaching end, and at least one sidewall there between, the pump housing having a base proximate to the first end and, the attaching end having an attacher structured and arranged to temporarily engage a syringe having a barrel with an open end opposite from a nozzle, the attacher structured and arranged to attach to the open end of the syringe, the syringe remaining external to the sidewall of the pump housing;
the at least one wave spring nested within the pump housing and attached proximate to the base, the at least one wave spring having a first position wherein the at least one wave spring is compressed under tension such that an initial height of the at least one wave spring is disposed within the pump housing, the at least one wave spring having a second extended position wherein, the release of the tension extends the at least one wave spring normally away from the pump housing, the at least one wave spring having a diameter pre-selected to pass within a barrel of the engaged syringe, the at least one wave spring further having a distal end structured and arranged to engage a plunger seal of the engaged syringe, wherein the release of the tension between the first position and the second position permits the distal end of the at least one wave spring to move the plunger seal towards the nozzle of the syringe.

A method for using a removable syringe micro pump with at least one wave spring to dispense a solution from a syringe, comprising:

providing the syringe having a barrel extending between a nozzle and a set of finger grips, a plunger seal disposed within the barrel and proximate to the finger grips, the solution disposed between the plunger seal and the nozzle;
providing a removable syringe micro pump including:
a cylindrical pump housing having a first end with a base and opposite thereto an attaching end providing at least one flange structured and arranged to temporarily bind with the finger grips of the syringe, the syringe having an open end opposite from the nozzle, the attaching end abutting the open end of the syringe, the cylindrical pump housing having a central longitudinal axis;
the at least one wave spring disposed within the cylindrical pump housing proximate to the base and about the longitudinal axis, the at least one wave spring being compressible to fit within the cylindrical pump housing when a distal end of the at least one wave spring is compressed to provide a first position, a height of the at least one wave spring being about the same as a length of the cylindrical pump housing, the at least one wave spring further selected to have a diameter sufficient to slide within the barrel of the syringe, the distal end of the at least one wave spring structured and arranged to engage the plunger seal of the engaged syringe;
and
a wave spring restrainer structured and arranged to restrain the at least one wave spring in the first position until released by an operator;
attaching the removable spring loaded micro pump to the syringe;
and
releasing the at least one wave spring restrainer to permit the distal end of the at least one wave spring to engage the plunger seal of the syringe, wherein, the release of tension from the first position permits the distal end of the wave spring to move the plunger seal towards the nozzle of the syringe, thereby, dispensing the solution from the syringe.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/729,896Filed 11 Oct 2017 · us provisional application
Priority: 12 Oct 2016
Published: US 2018/0099086 A112 Apr 2018
Granted: 3 Mar 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61M 5/1454
Pressurised by means of pistons: spring-actuated, e.g. by a clockwork
A61M 5/1456
Pressurised by means of pistons: with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part…
A61M 5/1458
Pressurised by means of pistons: means for capture of the plunger flange
A61M 5/168
Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor: means for controlling media flow to the body or for metering…