Ambulatory disposable infusion delivery system
First Claim
1. An infusion device comprisinga tubular housing for a fluid having an outlet aperture at one end for the fluid;
- a piston slidably mounted in said housing; and
an elastomer member within said housing connected to and between said piston and said housing to stretch in response to movement of said piston during filling of said housing with a fluid about said member and to impose a force on said piston after filling for expelling the fluid through said outlet aperture.
0 Assignments
0 Petitions
Accused Products
Abstract
There are depicted two embodiments of an ambulatory disposable infusion delivery system in which fluid (drug) is fed to a substantially transparent receiving and retaining housing which has indicia markings conventionally applied to indicate quantity. The inflow of fluid causes an elastomeric member attached to a piston, which is slideable in a bore in this housing, to be moved, thus stretching this member. This tension provides an energy source (force) to push the fluid out of the bore when the connected tubing line is opened. The housing is provied with a discharge fluid conduit and a restrictor controlling the rate of flow. In both embodiments, the housing has a barrel with a substantially constant bore. The slideable piston in this bore has a resilient outer portion with at least two ribs providing sealing action while having a low coefficient of friction. The front wall of the housing may be curved or straight and provides a fluid outlet as well as an aperture in which one end of a stretched elastomeric member is secured. The other end of this stretched member is secured to the slideable piston. Filling of the housing may be through a one-way valve or resilient plug. The controlling restrictor may be mounted and secured in the discharge tubing. This tubing may include a luer lock connector.
112 Citations
25 Claims
-
1. An infusion device comprising
a tubular housing for a fluid having an outlet aperture at one end for the fluid; -
a piston slidably mounted in said housing; and an elastomer member within said housing connected to and between said piston and said housing to stretch in response to movement of said piston during filling of said housing with a fluid about said member and to impose a force on said piston after filling for expelling the fluid through said outlet aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An infusion device comprising
a tubular housing for a fluid having a wall at one end with a first aperture therein and a second aperture for expelling fluid therefrom; -
a piston slidably mounted in said housing and having an aperture therein; a stretchable rubber tubing extending through said first aperture in said wall and through said aperture in said piston; a first plug mounted in one end of said tubing to secure said end to said wall in friction fit relation; and a second plug mounted in an opposite end of said tubing to secure said opposite end to said piston in friction fit relation. - View Dependent Claims (11)
-
-
12. An infusion device comprising
a tubular housing having a front wall having an inlet aperture for entry of a fluid and an outlet aperture for expelling fluid therethrough; -
a piston slidably mounted in said housing; and an elastomeric member connected to and between said wall and said piston within said housing to stretch in response to filling of a fluid into said housing through said inlet aperture and about said member and to impose a force on said piston after filling for expelling the fluid from about said member through said outlet aperture. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19. An ambulatory infusion pump comprising
a housing defining a chamber and having a one-way valve for filling fluid into said chamber; -
a restrictor communicating with said chamber for controlling a rate of fluid flow from said chamber; a piston slidably mounted in said housing; and a stretchable elastomer member within said housing connected between said housing and said piston to stretch in response to movement of said piston during filling of said housing about said member with a fluid and to impose a force on said piston after filling for expelling the fluid through said restrictor. - View Dependent Claims (20, 21, 22)
-
-
23. An infusion device comprising
a tubular housing having a pair of coaxial projecting tubular portions at one end and a plurality of holes between said tubular portions communication with the interior of said housing for conveying fluid therethrough; -
a piston slidably mounted in said housing; a recess in an outer one of said projecting tubular portions for receiving a flexible tubing in communication with the interior of said second tubular portion; and an elastomer member connected to and between said piston and the inner one of said tubular portions to stretch in response to movement of said piston during filling of said housing with a fluid and to impose a force on said piston after filling for expelling the fluid through said holes and said recess. - View Dependent Claims (24, 25)
-
Specification