The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2015
Filed:
Aug. 31, 2012
Applicants:
Jeffrey N. Schoess, Howard Lake, MN (US);
Kannan Sivaprakasam, St. Cloud, MN (US);
Inventors:
Jeffrey N. Schoess, Howard Lake, MN (US);
Kannan Sivaprakasam, St. Cloud, MN (US);
Assignee:
Eden Medical, Inc., Howard Lake, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 45/053 (2006.01); F04B 19/00 (2006.01); F04B 19/24 (2006.01); F04B 43/04 (2006.01); F04B 43/10 (2006.01);
U.S. Cl.
CPC ...
F04B 19/006 (2013.01); F04B 19/24 (2013.01); F04B 43/043 (2013.01); F04B 43/10 (2013.01);
Abstract
Miniature pumps for dispensing a volume a flowable substance are described. One pump embodiment includes an environmentally-responsive plug layer that can contract in size, e.g., when exposed to an environmental change such as temperature, to allow an activation solution to flow to a layer of expandable material, such as a superporous hydrogel. Expansion of the expandable material urges a diaphragm into a chamber that holds the dispensable fluid, gas, or gel, forcing the fluid, gas or gel out of the pump.