Infusion pump
First Claim
1. An apparatus for dispensing liquid under pressure comprising:
- a housing having a first opening at one end and a second opening at an opposite end thereof;
an elongated support member having a substantially cylindrical outer surface and a central channel extending axially within said support member from an inlet end to an outlet end, said support member having passages extending from said central channel through said outer surface;
a generally cylindrical elastomeric hollow bladder having an internal bore extending therethrough, said bladder being positioned on said support member between said inlet end and said outlet end and being secured thereon such that said internal bore forms a sealed cavity in fluid communication with said passages;
a flexible tube extendable through said inlet end and secured in said central channel so as to extend out from said outlet end of said support member; and
securing means adapted to be secured to said inlet end of said support member for securing said support member in said housing.
4 Assignments
0 Petitions
Accused Products
Abstract
An infusion pump has an outer housing within which is disposed a support mandrel with a bladder secured thereon. The mandrel has a substantially uniform circular cross-section with a central channel extending from an input end to an outlet end that has an enlarged mandrel flange or collar. An infusion tube is inserted through the inlet end, through the central channel and out through the outlet end of the mandrel. A seating tube bonded at a distal end of the infusion tube becomes seated in a tapered seating portion in the central channel. Thereafter the elastomeric bladder is secured on the mandrel. After both the infusion tube and the bladder have been secured to the mandrel, the inlet end of the mandrel is inserted through a bottom opening in the housing until the collar of the mandrel becomes seated in a circular collar projecting from a lower wall of the housing. A check valve is connected to the mandrel by a luer lock fitting through a top opening at the inlet end of the mandrel thereby securing the mandrel in the housing and closing the top and bottom openings. The end of the infusion tube that is extended out through the outlet end of the mandrel channel has a manually actuated tube clamp to regulate the flow of liquid from the bladder through the infusion tube and is connected to an air and particle eliminating filter. Another tube extending from the filter is connected to a flow control regulating device.
49 Citations
16 Claims
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1. An apparatus for dispensing liquid under pressure comprising:
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a housing having a first opening at one end and a second opening at an opposite end thereof; an elongated support member having a substantially cylindrical outer surface and a central channel extending axially within said support member from an inlet end to an outlet end, said support member having passages extending from said central channel through said outer surface; a generally cylindrical elastomeric hollow bladder having an internal bore extending therethrough, said bladder being positioned on said support member between said inlet end and said outlet end and being secured thereon such that said internal bore forms a sealed cavity in fluid communication with said passages; a flexible tube extendable through said inlet end and secured in said central channel so as to extend out from said outlet end of said support member; and securing means adapted to be secured to said inlet end of said support member for securing said support member in said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for dispensing liquid under pressure comprising:
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a housing having a first opening at one end and a second opening at an opposite end thereof, said housing being made of a relatively pliable plastic; an elongated support member extending from an inlet end to an outlet end, having a substantially cylindrical outer surface and having a central channel therethrough, said support member having passages extending from said central channel through said outer surface and having a flange portion on said outlet end; a generally cylindrical elastomeric hollow bladder having art internal bore extending therethrough, said bladder being positioned on said support member between said inlet end and said outlet end and being secured thereon such that said internal bore forms a sealed cavity in fluid communication with said passages; a tube means secured in said central channel so as to extend out from said outlet end of said support member; and securing means adapted to be secured to said inlet end of said support member for securing said support member in said housing such that said flange portion is pulled against said housing so as to close said second opening of said housing when said support member is secured to said housing by said securing means. - View Dependent Claims (16)
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Specification