Andrew J Nelson

US Patent:

20130096694, Apr 18, 2013

Filed:

Jun 21, 2012

Appl. No.:

13/529833

Inventors:

Ryan J. Caldwell - Long Grove IL, US
Andrew H. Hansen - Apple Valley MN, US
Sean M. Wood - Gardena CA, US
Wei Chen - Glenview IL, US
Regan A. Radcliffe - Sunnyvale CA, US
Kevin A. Yngve - Evanston IL, US
Bennett E. Kuhar - Concord Twp. OH, US
Andrew J. Nelson - Chicago IL, US
Eric Nickel - Brooklyn Park MN, US

Assignee:

NORTHWESTERN UNIVERSITY - Evanston IL

International Classification:

A61F 2/80

US Classification:

623 34

Abstract:

Pump systems for use in suspension of a prosthetic device from a residual limb and methods of suspending a prosthetic device from a residual limb are disclosed. The pump systems include a mechanically activated pump having a first compression member coupled to a second compression member, a compressible bladder disposed between the first and second compression members, and coupling elements that engage and couple together the first and second compression members. The mechanically activated pump may be connected with an electrically activated pump within a fluid circuit of a hybrid pump system to provide vacuum engagement between a prosthetic device and a residual limb.

US Patent:

20210060682, Mar 4, 2021

Filed:

Aug 4, 2020

Appl. No.:

16/984823

Inventors:

- Glenview IL, US
Caleb Rosera - Glenview IL, US
Andrew Nelson - Appleton WI, US

International Classification:

B23K 9/095
B23K 9/10

Abstract:

Disclosed are welding systems and methods for conducting a completed circuit testing process. The welding system includes a power source to deliver power via one or more power outlets. Control circuitry receives an input to initiate a welding process and to command the power source to deliver a power signal with a current below a threshold level. The control circuitry monitors characteristics of the power signal at the one or more power outlets and determines whether a completed circuit condition exists. The control circuitry performs this determination based on information obtained through monitoring the characteristics of the power signal. The control circuitry controls the power source to prevent delivery of power if a completed circuit condition exists.

US Patent:

20200290098, Sep 17, 2020

Filed:

Mar 12, 2020

Appl. No.:

16/816831

Inventors:

- Burr Ridge IL, US
Andrew J. Nelson - Chicago IL, US
Cullen Geppert - Chicago IL, US

Assignee:

Hydra-Stop LLC - Burr Ridge IL

International Classification:

B08B 9/045
B08B 9/043
B08B 9/035

Abstract:

Systems and methods are disclosed for cleaning an interior surface of a pressurized pipe. A conduit having a suction end disposed inside the pipe and a discharge end outside the pipe uses a pressure differential to create a suction flow through the pipe. A scrubber may be attached near the suction end to increase the amount of debris dislodged from the interior surface of the pipe.

US Patent:

20200292104, Sep 17, 2020

Filed:

Mar 12, 2020

Appl. No.:

16/817030

Inventors:

- Burr Ridge IL, US
Andrew J. Nelson - Chicago IL, US
Cullen Geppert - Chicago IL, US
Ariel Choi - Chicago IL, US
Atticus D. Rush - Libertyville IL, US

Assignee:

Hydra-Stop LLC - Burr Ridge IL

International Classification:

F16L 5/10
F16L 47/34
F16L 55/07
F16L 55/10
F16L 55/18

Abstract:

Systems and methods are disclosed for protecting a tether line within a pressurized pipe. As the tether line is extended and retracted, portions of the tether line are prevented from directly engaging jagged profiles formed in the pressurized pipe.

US Patent:

20200096408, Mar 26, 2020

Filed:

Sep 19, 2019

Appl. No.:

16/576295

Inventors:

- Burr Ridge IL, US
Andrew J. Nelson - Chicago IL, US

Assignee:

Hydra-Stop LLC - Burr Ridge IL

International Classification:

G01M 3/00

Abstract:

Systems and methods are disclosed for managing a cable attached to an inspection probe disposed in a pipe containing a fluid at an elevated pressure above an ambient pressure. The systems and methods include hot-tapping the pipe and attaching a launch housing to the pipe. The launch housing defines an interior chamber sized to receive the inspection probe and that fluidly communicates with the pipe, thereby placing the interior chamber at the elevated pressure. An uphole end of the cable is attached to a reel, and a cable drive mechanically engages the cable. The cable drive is operable in a forward direction, to advance the cable into the pipe, and a reverse direction, to retract the cable from the pipe.

US Patent:

20200096422, Mar 26, 2020

Filed:

Sep 19, 2019

Appl. No.:

16/576344

Inventors:

- Burr Ridge IL, US
Andrew J. Nelson - Chicago IL, US

Assignee:

Hydra-Stop LLC - Burr Ridge IL

International Classification:

G01N 1/20
F16L 41/04
F16L 55/07

Abstract:

Systems and methods for accessing and monitoring a fluid within a pressurized pipe include a nozzle coupled to a section of the pressurized pipe and defining an open proximal end fluidly communicating with the pressurized pipe through an access hole formed in the pressurized pipe, an open distal end, and an interior passage extending from the open proximal end to the open distal end. A cover plate is coupled to the open distal end of the nozzle. A valve element is disposed in the interior passage and movable between an open position, in which the valve element is entirely disposed within the nozzle, and a closed position, in which a proximal section of the valve element is disposed in the pressurized pipe. A sensor port extends through a proximal end of the nozzle and positioned to fluidly communicate with the interior passage when the valve element is in the open position.

US Patent:

20190376632, Dec 12, 2019

Filed:

May 29, 2019

Appl. No.:

16/425444

Inventors:

- Burr Ridge IL, US
Christopher C. Vazzana - Palos Park IL, US
Andrew J. Nelson - Chicago IL, US
Cullen Geppert - Chicago IL, US

Assignee:

Hydra-Stop LLC - Burr Ridge IL

International Classification:

F16L 41/04
F16K 27/06
F16L 29/00

Abstract:

An under-pressure tapping and access assembly is provided for use with a pressurized pipe. The under-pressure tapping and access assembly includes a multi-branch portion sealingly coupled to an outer surface of the pressurized pipe. A tapping branch of the multi-branch portion extending along a tapping branch axis that is substantially perpendicular relative to a pipe axis of the pressurized pipe. A first access branch of the multi-branch portion extending along a first access branch axis that is non-perpendicular relative to the pipe axis. A tool is sized for insertion through the first access branch.

US Patent:

20150265435, Sep 24, 2015

Filed:

Jun 4, 2015

Appl. No.:

14/730806

Inventors:

Ryan J. Caldwell - Long Grove IL, US
Andrew H. Hansen - Apple Valley MN, US
Sean M. Wood - Gardena CA, US
Wei Chen - Glenview IL, US
Regan A. Radcliffe - Sunnyvale CA, US
Kevin A. Yngve - Evanston IL, US
Bennett E. Kuhar - Concor Twp. OH, US
Andrew J. Nelson - Chicago IL, US
Eric Nickel - Brooklyn Park MN, US

Assignee:

NORTHWESTERN UNIVERSITY - Evanston IL

International Classification:

A61F 2/80
A61F 2/60
A61F 2/68
A61F 2/70

Abstract:

Pump systems for use in suspension of a prosthetic device from a residual limb and methods of suspending a prosthetic device from a residual limb are disclosed. The pump systems include a mechanically activated pump having a first compression member coupled to a second compression member, a compressible bladder disposed between the first and second compression members, and coupling elements that engage and couple together the first and second compression members. The mechanically activated pump may be connected with an electrically activated pump within a fluid circuit of a hybrid pump system to provide vacuum engagement between a prosthetic device and a residual limb.