Compact uniform pressure infusion apparatus
First Claim
Patent Images
1. An apparatus for dispensing a liquid under pressure at a substantially constant flow rate over a period of time comprising:
- support means extending from a central axis with a substantially radial spiral configuration outwardly from said central axis to a terminal end;
a pressure reservoir defined by an elongated elastic sleeve mounted on said support member and having an inner end disposed at said central axis and an outer end at said terminal end for holding a liquid in a pressurized state for dispensing therefrom;
means at said outer end for introducing a liquid into said pressure reservoir and for dispensing liquid from said pressure reservoir to a selected site.
4 Assignments
0 Petitions
Accused Products
Abstract
A liquid infusion apparatus includes an elongated elastic sleeve stretch mounted on a spiral support member within a housing to enable it to expand naturally to maintain a substantially constant pressure over the infusion period.
-
Citations
26 Claims
-
1. An apparatus for dispensing a liquid under pressure at a substantially constant flow rate over a period of time comprising:
-
support means extending from a central axis with a substantially radial spiral configuration outwardly from said central axis to a terminal end; a pressure reservoir defined by an elongated elastic sleeve mounted on said support member and having an inner end disposed at said central axis and an outer end at said terminal end for holding a liquid in a pressurized state for dispensing therefrom; means at said outer end for introducing a liquid into said pressure reservoir and for dispensing liquid from said pressure reservoir to a selected site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 25)
-
-
14. A dispensing apparatus for dispensing a liquid under pressure at a substantially constant flow rate over a period of time comprising:
-
a housing having an opening; support means in said housing having an inner end and a substantially radial spiral configuration outwardly from a central axis to an outer end at said opening; an elongated elastic sleeve mounted on said support member having an inner end disposed at said central axis and an outer end at said opening for holding a liquid in a pressurized state for dispensing therefrom; means at said outer end for introducing a liquid into said pressure reservoir and for dispensing liquid from said pressure reservoir to a selected site. - View Dependent Claims (15, 16, 17, 18, 19, 20, 22, 23, 24, 26)
-
-
21. A dispensing apparatus for dispensing a liquid under pressure at a substantially constant flow rate over a period of time comprising:
-
a housing having a spiral configuration with an outer terminal wall and an opening in said wall; a support member defined by an inner wall in said housing having an inner end and a substantially radial spiral configuration extending outwardly from said inner end at a central axis to an outer end at said opening; an elongated elastic sleeve mounted in a stretched condition on said support member and having an inner end disposed at said central axis and an outer end at said opening for holding a liquid in a pressurized state for dispensing therefrom; and coupling means including a check valve at said outer end for introducing a liquid into said pressure reservoir, and for dispensing liquid from said pressure reservoir to a selected site.
-
Specification