US4496343A — Infusate pump

Claim 1

Independent Claim 162 words

Implantable infusion apparatus comprising: A. an infusate reservoir; B. an entry port into said infusate reservoir; C. a self-sealing penetrable septum closing said entry port; D. a small fixed-volume chamber; E. an entry port into said chamber; F. a second self-sealing penetrable septum closing the entry port into said chamber, the exposed surfaces of both said septa being located near one another in substantially the same plane or in parallel planes to that, when the apparatus is implanted in the body, both said septa are accessible extracorporeally by transcutaneous injection at nearby locations on the body surface; G. means defining a fluid inlet passage extending from said reservoir to said chamber; H. means for moving the contents of said reservoir to said chamber; and I. means defining a substantially unrestricted fluid outlet passage from said chamber for connection to a conduit leading to an infusion site so that an injection of infusate into said chamber flows substantially immediately to the infusion site.

Claim 2

Dependent Claim 162 words

Implantable infusion apparatus comprising: A. an infusate reservoir; B. an entry port into said infusate reservoir; C. a self-sealing penetrable septum closing said entry port; D. a small fixed-volume chamber; E. an entry port into said chamber; F. a second self-sealing penetrable septum closing the entry port into said chamber, the exposed surfaces of both said septa being located near one another in substantially the same plane or in parallel planes to that, when the apparatus is implanted in the body, both said septa are accessible extracorporeally by transcutaneous injection at nearby locations on the body surface; G. means defining a fluid inlet passage extending from said reservoir to said chamber; H. means for moving the contents of said reservoir to said chamber; and I. means defining a substantially unrestricted fluid outlet passage from said chamber for connection to a conduit leading to an infusion site so that an injection of infusate into said chamber flows substantially immediately to the infusion site.

Claim 3

Dependent Claim 165 words

Infusion apparatus comprising A. a housing; B. a container mounted inside the housing, said container defining along with the housing (1) a first chamber inside the container, and (2) a second chamber outside the container, but inside the housing; C. an entry port into one of said chambers; D. a self-sealing penetrable septum closing said entry port; E. a third small fixed-volume chamber; F. an entry port into the third chamber; G. a second self-sealing penetrable septum closing the entry port into the third chamber; H. means defining a fluid inlet passage extending from said one chamber to the third chamber; I. means in the other of said first and second chambers for moving the contents of said one chamber to said third chamber; and J. means defining a substantially unrestricted fluid outlet passage from the third chamber for connection to a cannula leading to an infusion site so that an injection of infusate into the third chamber flows substantially immediately to the infusion site.

Claim 4

Dependent Claim 165 words

Infusion apparatus comprising A. a housing; B. a container mounted inside the housing, said container defining along with the housing (1) a first chamber inside the container, and (2) a second chamber outside the container, but inside the housing; C. an entry port into one of said chambers; D. a self-sealing penetrable septum closing said entry port; E. a third small fixed-volume chamber; F. an entry port into the third chamber; G. a second self-sealing penetrable septum closing the entry port into the third chamber; H. means defining a fluid inlet passage extending from said one chamber to the third chamber; I. means in the other of said first and second chambers for moving the contents of said one chamber to said third chamber; and J. means defining a substantially unrestricted fluid outlet passage from the third chamber for connection to a cannula leading to an infusion site so that an injection of infusate into the third chamber flows substantially immediately to the infusion site.

Claim 5

Dependent Claim 16 words

The apparatus defined in claim 2 wherein said inlet passage defining means includes a fluid restriction.

Claim 6

Dependent Claim 28 words

The apparatus defined in claim 2 wherein the inlet passage defining means include check valve means for preventing fluid flow from said third chamber to said one chamber.

Claim 7

Dependent Claim 31 words

The apparatus defined in claim 2 wherein A. the container is collapsible; and B. the moving means comprise a fluid power cell contained in said other chamber for collapsing the container.

Claim 8

Dependent Claim 26 words

The apparatus defined in claim 2 wherein the first and second septa are spaced apart from one another on the same outside wall of said housing.

Claim 9

Dependent Claim 22 words

The infusion apparatus defined in claim 1 and further including means for inhibiting back-flow of fluid from said chamber to said reservoir.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-01-29	1988-07-30	1989-01-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-01-29	1992-07-30	1993-01-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-01-29	1996-07-30	1997-01-29	$7700.00	Window Closed / Lapsed

Infusate pump

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