Ronald K Clark

US Patent:

46575294, Apr 14, 1987

Filed:

Nov 22, 1985

Appl. No.:

6/801131

Inventors:

Paul R. Prince - Fountain Valley CA
Ronald L. Clark - Westminster CA

Assignee:

Hemascience Laboratories, Inc. - Santa Ana CA

International Classification:

A61M 103

US Classification:

604 6

Abstract:

A blood extraction and reinfusion flow control system includes a blood pump coupled to pump intravenous fluid to or from a subject, a pressure sensor coupled to sense extra veinous pressure at the subject, and a microprocessor based flow control subsystem. The flow control subsystem optimizes the flow rate by sensing pressure at at least two different fluid flow test points and extrapolating and translating the test point data to generate a flow control curve. The blood pump is then operated at a maximum speed that is limited by a desired maximum flow command and the flow control curve to maximize flow without vein collapse or damage during both blood extraction and reinfusion.

US Patent:

48790400, Nov 7, 1989

Filed:

Dec 22, 1988

Appl. No.:

7/291413

Inventors:

Paul R. Prince - Fountain Valley CA
Michael G. Ford - Riverside CA
Donald W. Schoendorfer - Santa Ana CA
Ronald L. Clark - Westminster CA

Assignee:

Baxter International Inc. - Deerfield IL

International Classification:

B01C 1300

US Classification:

210637

Abstract:

An adaptive filter concentrate flow control system and method includes a filter system, a pumping system driving feed fluid, concentrate and filtrate flowing through the filter system and a flow control system controlling the pumping system to maintain optimum filtrate flow rates along a control curve in a transmembrane pressure--feed fluid rate--filtrate flow rate three dimensional space. Actual sensed operating point data is used to locate the control curve so as to assure an optimized filtrate flow rate at which reversible blocking of the membrane has begun to occur without irreversible plugging. The system is advantageously employed to control and maximize the flow of plasma in a plasmapheresis system.

US Patent:

20190038961, Feb 7, 2019

Filed:

Aug 1, 2017

Appl. No.:

15/666458

Inventors:

Ronald Clark - Carson CA, US

International Classification:

A63F 1/02

Abstract:

A set of ordered playing cards includes indicia of preceding and following cards. The indicia are on the face of each cards and preferably along the side and orientated corresponding to the card designation commonly on the top left and bottom right corner of each card. The first card in the ordered set references the last card as the preceding card, and the last card in the deck references the first card as the following card.