US 8,529,538 B2Granted

Drug-delivery pumps and methods of manufacture

AssigneeMiniPumps, LLC

InventorsChanglin Pang, Fukang Jiang, Jason Shih, Sean Caffey, Mark Humayun, Yu-Chong Tai

Life of this patent

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Abstract

Embodiments of an implantable electrolytic pump include a first expandable diaphragm and a second flexible diaphragm, and first and second chambers each for containing a fluid, wherein the first expandable diaphragm separates the first and second chambers and provides a fluid barrier therebetween, and the second chamber is formed between the first expandable diaphragm and the second flexible diaphragms. The pump may further include electrolysis electrodes within the first chamber for causing generation of a gas therein and to thereby expand the expandable diaphragm so that fluid is forced from the second chamber into a cannula.

Claims21

Dependent claims

A method of administering a drug, the method comprising the steps of:

providing a pump comprising an electrolysis chamber, a drug chamber and a perforated shell thereover, the shell being in contact with a surrounding fluid;
activating the electrolysis chamber to dispense a volume of drug from the drug chamber, whereby the drug chamber decreases in volume as drug is dispensed therefrom;
and
deactivating the electrolysis chamber to stop dispensation of the drug whereby the electrolysis chamber decreases in volume, the decrease in volume of the electrolysis chamber causing a buildup of vacuum pressure on the drug chamber via a common membrane, fluid being admitted through the shell perforations to offset the decreased volume of the drug chamber and prevent the buildup of vacuum pressure thereon.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/541,005Filed 3 Jul 2012 · division
Priority: 8 May 2008
Published: US 2012/0277733 A11 Nov 2012
Granted: 10 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

A61F 9/00781
Methods or devices for eye surgery: apparatus for modifying intraocular pressure, e.g. for glaucoma treatment
A61F 9/0017
Introducing ophthalmic products into the ocular cavity or retaining products therein: implantable in, or in contact with, the eye, e.g. ocular inserts
A61M 5/142
Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor: pressure infusion, e.g. using pumps
A61M 5/14276
Adapted to be carried by the patient, e.g. portable on the body: specially adapted for implantation

Family

Application61/051,422Us provisional application · filed 8 May 2008
Application61/197,817Us provisional application · filed 30 Oct 2008
Application61/197,750Us provisional application · filed 30 Oct 2008
Application61/198,144Us provisional application · filed 3 Nov 2008
Application61/201,197Us provisional application · filed 8 Dec 2008
Application61/150,515Us provisional application · filed 6 Feb 2009
Application12/463,251Parent of this division · filed 8 May 2009
US 2012/0277733 A1Pre-grant publication · published 1 Nov 2012
US 8,231,608 B2Parent of this division
US 2009/0312742 A1Published application
US 8,529,538 B2This patent

From the US filing history. Foreign family members aren’t listed.