Michael J Gearhart

US Patent:

8152477, Apr 10, 2012

Filed:

Nov 22, 2006

Appl. No.:

12/094956

Inventors:

Deon Stafford Anex - Livermore CA, US
Charles Martin Schwimmer - Los Gatos CA, US
David Laurence Black - Los Gatos CA, US
Richard Dean Rush - Belmont CA, US
Michael James Gearhart - Fremont CA, US

Assignee:

Eksigent Technologies, LLC - Dublin CA

International Classification:

F04F 99/00
F01B 31/00
G01F 11/00
A61M 1/00

US Classification:

417 48, 91422, 92181 R, 222309, 222319, 222340, 604152

Abstract:

One embodiment of the present invention provides a piston assembly having a piston housing filled with an electrolyte; a housing within the piston housing that divides the piston housing into a first portion and a second portion, the housing having apertures, a shaft connecting the housing to a piston head outside of the piston housing; and a porous material inside of the housing in contact with the electrolyte. Additionally, there are provided a method for filling the delivery chamber with a delivery fluid by withdrawing the piston head from within the delivery chamber. Yet another embodiment provides a method for filling a fluid delivery assembly by withdrawing a shaft from within the fluid delivery assembly to simultaneously displace a moving pump element within the delivery chamber and bypass fluid around a housing in the pump chamber.

US Patent:

8216254, Jul 10, 2012

Filed:

Jul 30, 2009

Appl. No.:

12/512674

Inventors:

Matthew McLean - San Francisco CA, US
Mitchell C. Barham - San Mateo CA, US
Michael Wei - Redwood City CA, US
Floria Cheng - San Francisco CA, US
Andrew L. Johnston - Redwood City CA, US
Michael Gearhart - Fremont CA, US
Joseph Catanese, III - San Leandro CA, US
Theodore C. Lamson - Pleasanton CA, US
Joshua Makower - Los Altos CA, US

Assignee:

Neotract, Inc. - Pleasanton CA

International Classification:

A61B 17/10

US Classification:

606139, 606144, 606146

Abstract:

A system and associated method for manipulating tissues and anatomical or other structures in medical applications for the purpose of treating diseases or disorders or other purposes. In one aspect, the system includes a delivery device configured to deploy and implant anchor devices for such purposes.

US Patent:

8333776, Dec 18, 2012

Filed:

Aug 6, 2010

Appl. No.:

12/852243

Inventors:

Floria Cheng - San Francisco CA, US
Michael Gearhart - Fremont CA, US
Andrew Johnston - Redwood City CA, US
Theodore C. Lamson - Pleasanton CA, US
Matthew McLean - San Francisco CA, US
Daniel Merrick - Dublin CA, US
Paul Suarez - Shadow Hills CA, US
Brian Y. Tachibana - Oakland CA, US
Ben Thompson - San Carlos CA, US
Ling-Kang Tong - Fremont CA, US
Joseph Catanese, III - San Leandro CA, US

Assignee:

Neotract, Inc. - Pleasanton CA

International Classification:

A61B 17/10

US Classification:

606139, 606144, 606146

Abstract:

A system and associated method for manipulating tissues and anatomical or other structures in medical applications for the purpose of treating diseases or disorders or other purposes. In one aspect, the system includes a delivery device configured to deploy and implant anchor devices for such purposes.

US Patent:

8628542, Jan 14, 2014

Filed:

Dec 27, 2010

Appl. No.:

12/979075

Inventors:

Daniel Merrick - Dublin CA, US
Joseph Catanese, III - San Leandro CA, US
Ling-Kang Tong - Fremont CA, US
Floria Cheng - San Francisco CA, US
Michael Gearhart - Fremont CA, US
Matthew McLean - San Francisco CA, US
Brian Y. Tachibana - Oakland CA, US
Ben Thompson - San Carlos CA, US
James W. Niederjohn - San Jose CA, US

Assignee:

NeoTract, Inc. - Pleasanton CA

International Classification:

A61B 17/10

US Classification:

606139

Abstract:

A system and associated method for altering or destroying tissues and anatomical or other structures in medical applications for the purpose of treating diseases or disorders. In one aspect, the system includes a device configured to deploy devices for altering the lobes of a prostate.

US Patent:

20070148014, Jun 28, 2007

Filed:

Nov 22, 2006

Appl. No.:

11/603925

Inventors:

Deon Anex - Livermore CA, US
Charles Schwimmer - Los Gatos CA, US
David Black - Los Gatos CA, US
Richard Rush - Belmont CA, US
Michael Gearhart - Fremont CA, US

International Classification:

F04B 17/00

US Classification:

417392000

Abstract:

The present invention provides a fluid delivery system having a first chamber, a second chamber and a third chamber; a flow-through pump element separating the first chamber from the second chamber; a moveable pump element separating the second chamber from the third chamber; a first outlet in communication with the third chamber; and second outlet in communication with the second chamber. Additionally, the present invention provides methods of operating a fluid delivery system having a first chamber, a second chamber and a delivery chamber by reducing the volume of the second chamber while increasing the volume of the delivery chamber without operation of a flow-through pump element that separates the second chamber from the first chamber.

US Patent:

20070224055, Sep 27, 2007

Filed:

Nov 22, 2006

Appl. No.:

11/603926

Inventors:

Deon Anex - Livermore CA, US
Charles Schwimmer - Los Gatos CA, US
David Black - Los Gatos CA, US
Richard Rush - Belmont CA, US
Michael Gearhart - Fremont CA, US

International Classification:

F04B 17/00

US Classification:

417404000

Abstract:

One embodiment of the present invention provides a piston assembly having a piston housing filled with an electrolyte; a housing within the piston housing that divides the piston housing into a first portion and a second portion, the housing having apertures, a shaft connecting the housing to a piston head outside of the piston housing; and a porous material inside of the housing in contact with the electrolyte. Additionally, there are provided a method for filling the delivery chamber with a delivery fluid by withdrawing the piston head from within the delivery chamber. Yet another embodiment provides a method for filling a fluid delivery assembly by withdrawing a shaft from within the fluid delivery assembly to simultaneously displace a moving pump element within the delivery chamber and bypass fluid around a housing in the pump chamber.

US Patent:

20080154187, Jun 26, 2008

Filed:

Dec 21, 2006

Appl. No.:

11/614211

Inventors:

Peter Krulevitch - Pleasanton CA, US
Mingqi Zhao - San Jose CA, US
Sebastian Bohm - Los Gatos CA, US
Deon Anex - Livermore CA, US
Michael Gearhart - Fremont CA, US

Assignee:

LifeScan, Inc. - Milpitas CA

International Classification:

A61M 1/00

US Classification:

604 48

Abstract:

The present application is directed to systems and methods associated with infusion pumps, which can optionally utilize an electrokinetic driving mechanism. Infusion pumps, including electrokinetically-driven pumps, are discussed, along with schemes for controlling their operation. As well, systems and methods of detecting malfunctions in infusion pumps are discussed. Any number of malfunctions can be detected including the presence of occlusions and/or leaks. In some instances, a measurement associated with some aspect of electrokinetic phenomena (e.g., an electrode measurement such as voltage or current) is compared with one or more sample values, the comparison allowing an indication of pump malfunction to be determined. A variety of such measurements and comparison techniques are discussed in the present disclosure.

US Patent:

20110031268, Feb 10, 2011

Filed:

Mar 22, 2010

Appl. No.:

12/728844

Inventors:

Deon Stafford Anex - Livermore CA, US
Charles Martin Schwimmer - Los Gatos CA, US
David Laurence Black - Los Gatos CA, US
Richard Dean Rush - Belmont CA, US
Michael James Gearhart - Fremont CA, US

International Classification:

G01F 11/00

US Classification:

222 1

Abstract:

One embodiment of the present invention provides a piston assembly having a piston housing filled with an electrolyte; a housing within the piston housing that divides the piston housing into a first portion and a second portion, the housing having apertures, a shaft connecting the housing to a piston head outside of the piston housing; and a porous material inside of the housing in contact with the electrolyte. Additionally, there are provided a method for filling the delivery chamber with a delivery fluid by withdrawing the piston head from within the delivery chamber. Yet another embodiment provides a method for filling a fluid delivery assembly by withdrawing a shaft from within the fluid delivery assembly to simultaneously displace a moving pump element within the delivery chamber and bypass fluid around a housing in the pump chamber.