Jack Lee Walker

US Patent:

41919572, Mar 4, 1980

Filed:

Dec 12, 1975

Appl. No.:

5/640570

Inventors:

Jack L. Walker - Ann Arbor MI
Walter G. Carrara - Ann Arbor MI

Assignee:

Environmental Research Institute of Michigan - Ann Arbor MI

International Classification:

G01S 902

US Classification:

343 5PC

Abstract:

A method for range-Doppler imaging of rotating objects or of stationary scenes being tracked by a sensor carried by a moving vehicle includes the transmission and reception of sequential modulated signals, coherent demodulation of the received signals, recording of the demodulated signals, and a two-dimensional processing of the recorded signals to obtain a spatial image of the scene. In the disclosed inventive concept, the demodulated signals are recorded in a two-dimensional polar format wherein the angular coordinate of the signal on the recording medium is proportional to the relative angular position of the object or scene being imaged and the radial coordinate of the signal on the recording medium is proportional to the transmitted signal frequency within each transmitted pulse.

US Patent:

20210148355, May 20, 2021

Filed:

Jan 28, 2021

Appl. No.:

17/160884

Inventors:

- YOKNEAM, IL
Andrei SZILAGYI - Fullerton CA, US
Alexander LIFSHITZ - Arcadia CA, US
Jack WALKER - Sunnyvale CA, US
Sean Yasuo SULLIVAN - Mountain View CA, US

International Classification:

F04B 43/12
F04B 43/00

Abstract:

A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.

US Patent:

20180230988, Aug 16, 2018

Filed:

Feb 16, 2017

Appl. No.:

15/434465

Inventors:

- Yokneam, IL
Andrei Szilagyi - Fullerton CA, US
Alexander Lifshitz - Arcadia CA, US
Jack Walker - Sunnyvale CA, US
Sean Yasuo Sullivan - Mountain View CA, US

International Classification:

F04B 43/12
F04B 43/00

Abstract:

A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.