David J Cho

US Patent:

6528739, Mar 4, 2003

Filed:

Aug 29, 2000

Appl. No.:

09/650067

Inventors:

Albert Nowosielski - Roselle IL
Russell Kuzelka - New Berlin WI
Charles Zander - Buffalo Grove IL
David Cho - Belvidere IL
Raymond Jacobs - Wauconda IL

Assignee:

Northgate Technologies Incorporated - Elgin IL

International Classification:

G01G 2318

US Classification:

177 45, 177225, 177245, 600580

Abstract:

A fluid sensor apparatus for monitoring fluid in a container. The fluid sensor apparatus comprises a housing having an upper hook extending from a top thereof to allow the housing to be suspended. A lower hook is telescopically received in the housing and extends from a bottom thereof. The lower hook is adapted for suspending a fluid container therefrom. The lower hook is movable relative to the housing. A cam member is located inside the housing and is movable relative thereto. The cam member is coupled to an upper end of the lower hook. The cam member has a stepped gradation. A biasing member is coupled between a lower shoulder of the cam member and the housing. The biasing member is adapted to apply a force against the cam member to cause the cam member to be biased upward relative to the housing to an upper position. A switch is coupled to the housing and has an actuator located in relation to the stepped gradation of the cam member. The switch is in a first state when the cam member is in the upper position.

US Patent:

61215554, Sep 19, 2000

Filed:

Sep 3, 1999

Appl. No.:

9/390564

Inventors:

Albert Nowosielski - Roselle IL
Russell Kuzelka - New Berlin WI
Charles Zander - Buffalo Grove IL
David Cho - Belvidere IL
Raymond Jacobs - Wauconda IL

Assignee:

Northgate Technologies Incorporated - Elgin IL

International Classification:

G01G 2318
G01G 1900

US Classification:

177 45

Abstract:

A fluid sensor apparatus for monitoring fluid in a container. The fluid sensor apparatus comprises a housing having an upper hook extending from a top thereof to allow the housing to be suspended. A lower hook is telescopically received in the housing and extends from a bottom thereof. The lower hook is adapted for suspending a fluid container therefrom. The lower hook is movable relative to the housing. A cam member is located inside the housing and is movable relative thereto. The cam member is coupled to an upper end of the lower hook. The cam member has a stepped gradation. A biasing member is coupled between a lower shoulder of the cam member and the housing. The biasing member is adapted to apply a force against the cam member to cause the cam member to be biased upward relative to the housing to an upper position. A switch is coupled to the housing and has an actuator located in relation to the stepped gradation of the cam member. The switch is in a first state when the cam member is in the upper position.

US Patent:

20200282117, Sep 10, 2020

Filed:

Mar 3, 2020

Appl. No.:

16/807723

Inventors:

- Baar, CH
David Y. Cho - Arlington Heights IL, US

International Classification:

A61M 1/06
A61M 1/00

Abstract:

A method and system for enhancing expression of milk from breast alveoli includes providing a pump that delivers a pulsed vacuum. The pulsed vacuum may be delivered by a vacuum pump employing a rigid piston that operates as a multi-stroke accumulator pump. In an embodiment, a piston head of the rigid piston undergoes a non-linear motion relative to a sidewall of a cylinder of the pump, resulting in an oscillatory impulse on the interior of the vacuum chamber in the cylinder. The vacuum pulse frequency of the pump is applied over a cyclical vacuum frequency that would otherwise be applied had the piston head only moved up and down while maintaining a perpendicular relationship to the sidewall of the cylinder.

US Patent:

20200061264, Feb 27, 2020

Filed:

Oct 30, 2019

Appl. No.:

16/668816

Inventors:

- Baar, CH
David Y. Cho - Arlington Heights IL, US
Mario Rigert - Buchrain, CH

International Classification:

A61M 1/06
A61M 39/22
A61M 1/00
F16K 15/18

Abstract:

A mechanical fluid pressure modification valve, or “MFLP-valve”, is set forth. The MFLP-valve can be actuated upon movement of a movable pressure system member of a medical pressure system reaching a selected position. Additionally, the MFLP-valve can be actuated based on a pressure condition of the system. When the MFLP-valve unseals, a pressure differential between a pressure chamber and a volume outside of the chamber can be relieved. Disengagement of the movable pressure system member from the MFLP-valve can enable the MFLP-valve to re-seal. The MFLP-valve may include a flag that indicates the position of the movable pressure system member. The MFLP-valve may be provided in a diaphragm-type pressure source.

US Patent:

20170043073, Feb 16, 2017

Filed:

Aug 12, 2016

Appl. No.:

15/235370

Inventors:

- Baar, CH
David Cho - Arlington Heights IL, US
Mario Rigert - Buchrain, CH

International Classification:

A61M 1/06
A61M 39/22

Abstract:

A mechanical fluid pressure modification valve, or “MFLP-valve”, is set forth. The MFLP-valve can be actuated upon movement of a movable pressure system member of a medical pressure system reaching a selected position. Additionally, the MFLP-valve can be actuated based on a pressure condition of the system. When the MFLP-valve unseals, a pressure differential between a pressure chamber and a volume outside of the chamber can be relieved. Disengagement of the movable pressure system member from the MFLP-valve can enable the MFLP-valve to re-seal. The MFLP-valve may include a flag that indicates the position of the movable pressure system member. The MFLP-valve may be provided in a diaphragm-type pressure source.

US Patent:

20160296680, Oct 13, 2016

Filed:

Apr 12, 2016

Appl. No.:

15/096720

Inventors:

- Baar, CH
John R. Skach - Cary IL, US
David Cho - Arlington Heights IL, US

International Classification:

A61M 1/06
A61M 1/00

Abstract:

A pressure system in a communication loop with an atmospheric pressure data source is set forth. Atmospheric pressure data from the atmospheric pressure data source can be received by a processor to set one or more operating parameters for the pressure system based on environmental data provided in the atmospheric pressure data from an absolute pressure sensor or other atmospheric data source.

US Patent:

20160287767, Oct 6, 2016

Filed:

Apr 5, 2016

Appl. No.:

15/091286

Inventors:

- Baar, CH
John R. Skach - Cary IL, US
Ryan Bauer - Fox River Grove IL, US
Deanna Gilbert - Arlington Heights IL, US
David Cho - Arlington Heights IL, US

International Classification:

A61M 1/06

Abstract:

Methods and systems for an improved feedback milk extraction system are described. According to aspects, the system may communicate with various electronic devices and/or server components to exchange data and perform certain functionalities. The functionalities may include providing visual and audio feedback to a user, supporting unique kit identification as well as associated user profiles and preferred configuration settings, detecting and responding to leaks having various sizes during operation of the breastpump, controlling operation of the breastpump in response to detected leaks and the detected type and/or magnitude of the leak, preemptively contacting customers if a fault condition is detected or imminent, enabling effective labeling of collection containers, and determining volume and flow of expressed breastmilk.

US Patent:

20160228624, Aug 11, 2016

Filed:

Feb 10, 2016

Appl. No.:

15/040253

Inventors:

- Baar, CH
David Cho - Arlington Heights IL, US
Kathryn Mizuchi - Round Lake Beach IL, US

International Classification:

A61M 1/06
B01D 19/00

Abstract:

A directed media separation system includes components for directing a consistent collapse of a media separation device in response to a varying pressure from a pressure source. The media separation device can be removably connected to a directing element. The directing element can have a directing geometry that affects the collapse of the media separation device. The media separation device can have a preset geometry that collapses in a predictable and repeatable manner from the applied pressure.