David A Bell
Engineers in Farmington, UT

6804543, Oct 12, 2004

Mar 19, 2002

10/099974

David R. Miller - Morgan UT
David A. Bell - Farmington UT
Douglas L. Cox - Morgan UT
Songbiao Zhang - Sandy UT

Hema Metrics, Inc. - Kaysville UT

A61B 500

600310, 600322

An optical sensor includes a sensing pair of complementary emitter and detector elements for measuring the bulk absorptivity () of an area parallel to and including a hemodialysis access site, and a normalizing pair of complementary emitter and detector elements for measuring the absorptivity ( ) of the tissue itself perpendicular to the access site. The pairs of emitter and detector elements define two lines at right angles to each other, and one of the pairs lies to one side of the line defined by the other of the pairs, such that the two pairs of emitter and detector elements form a “T” shape. Indicator dilution techniques are used to measure vascular access flow rates during routine hemodialysis, using the sensor.

8425664, Apr 23, 2013

Jan 14, 2010

12/687746

J. Clair Batty - North Logan UT, US
David A. Bell - Farmington UT, US
Craig E. Cox - Fruit Heights UT, US

Purestream Technology, LLC - Salt Lake City UT

B01D 47/00

95219, 95224, 95227, 95228

Petroleous production is associated with effluents well known to foul lines, nozzles, and containers while consuming substantial energy to assist in both production and remediation. A heat exchanger and manifold system maximizes flows, minimizes changes in flow cross-section, and maximizes heat transfer area, while recycling both water and heat between processes. Dirty regions and clean regions result from scrubbing horizontal exhaust stacks and evaporation of production water in concert to remediate one another, while recycling a significant portion of the energy consumed by each. The heat exchanger relies on a manifold having many layered conduits, each connected to a single layer level of one or more cylindrical conduits in the exchanger. The cylinders of the exchanger themselves are arranged in multiple layers, each layer of a heat exchanger element being connected to a single layer of the manifold. Any shape of cylinder may work, but a right circular cylinder having corrugated sheets spacing the layers may be simple to construct.

7708694, May 4, 2010

Jul 24, 2007

11/878342

Perry N. Law - Centerville UT, US
Douglas L. Cox - Morgan UT, US
David R. Miller - Morgan UT, US
David A. Bell - Farmington UT, US

Hema Metrics, Inc. - Kaysville UT

A61B 5/00

600499, 600490

A cuff for measuring volume and change in volume of a body appendage includes a hollow, rigid tube having an inner surface; and a bladder having an inner surface and an outer surface, the ends of the bladder being sealed to the ends of the tube to create an enclosed internal volume between the inner surface of the bladder and the inner surface of the tube and an external volume defined by the outer surface of the bladder and surrounded by the internal volume, the bladder having a normal, relaxed state, in which the internal volume is filled with a fluid and a retracted state in which the fluid is evacuated from the internal volume. Two stiffener ribs placed on the inner surface of the bladder, parallel to each other and to the lengthwise axis of the tube at diametrically opposite positions. A plurality of emitters and detectors arranged in a linear array are embedded in one of the ribs, so as to emit and detect light through the bladder. A fluid port extending through the tube and communicating with the internal volume, through which the internal volume can be filled with or emptied of the fluid.

7247143, Jul 24, 2007

Oct 29, 2003

10/695441

Perry N. Law - Centerville UT, US
Douglas L. Cox - Morgan UT, US
David R. Miller - Morgan UT, US
David A. Bell - Farmington UT, US

Hema Metrics, Inc. - Kaysville UT

A61B 5/02, A61B 17/00

600499, 606202

A cuff for measuring volume and change in volume of a body appendage includes a hollow, rigid tube having an inner surface; and a bladder having an inner surface and an outer surface, the ends of the bladder being sealed to the ends of the tube to create an enclosed internal volume between the inner surface of the bladder and the inner surface of the tube and an external volume defined by the outer surface of the bladder and surrounded by the internal volume, the bladder having a normal, relaxed state, in which the internal volume is filled with a fluid and a retracted state in which the fluid is evacuated from the internal volume. Two stiffener ribs placed on the inner surface of the bladder, parallel to each other and to the lengthwise axis of the tube at diametrically opposite positions. A plurality of emitters and detectors arranged in a linear array are embedded in one of the ribs, so as to emit and detect light through the bladder. A fluid port extending through the tube and communicating with the internal volume, through which the internal volume can be filled with or emptied of the fluid.

2004022, Nov 4, 2004

May 28, 2004

10/855384

Robert Steuer - Pleasant View UT, US
David Bell - Farmington UT, US
David Miller - Morgan UT, US

A61M005/00

600/505000, 600/504000

Indicator dilution techniques are used to measure vascular access flow rates during routine hemodialysis. A bolus injection port is used to infuse a specific volume (V) of an indicator diluent into the patient cardiovascular circuit by one of the following: 1. Needle injection of a known volume of indicator diluent directly into the access site in the presence or absence of the hemodialysis circuit. 2. Infusion of an indicator diluent into the arterial, venous line upstream of the venous needle. 3. Turning the ultrafiltration of the dialysis delivery system from OFF to ON and OFF again over a predetermined time period. 4. In a hemodialysis circuit, turning on the hemodialysis pump and using the priming saline volume as a single saline bolus. A transdermal sensor is used to measure the percent change in a blood parameter. The sensor is positioned directly over the vascular access site a prescribed distance downstream of the injection site and upstream of the access-vein connection. The sensor employs emitter and detector elements at multiple spacings (d, d) for the purpose of measuring the bulk absorptivity () of the area immediately surrounding and including the access site, and the absorptivity () of the tissue itself.

8425666, Apr 23, 2013

Jan 14, 2010

12/687753

J. Clair Batty - North Logan UT, US
Craig E. Cox - Fruit Heights UT, US
David A. Bell - Farmington UT, US

Purestream Technology, LLC - Salt Lake City UT

B01D 47/00

95235, 423224, 42324303, 4232453

Production brines are used to scrub a horizontal stack receiving exhaust from an energy source, controlling, reducing, or both noxious chemicals. Mutual remediation of flows from petroleous production cool and scrub exhausts from flares burning waste hydrocarbons, heaters lowering viscosity of crude oil, engines driving oil pumps or natural gas compressors, and the like. Resulting evaporation of production brines results in distilled water, more concentrated brines to reduce hauling, or, optionally, dehydrated dry waste minerals from the brines. Year-round operation of brine evaporation ponds is facilitated, and may be another source of process pre-heating.

6937882, Aug 30, 2005

Dec 9, 2003

10/730005

Robert R. Steuer - Pleasant View UT, US
David A. Bell - Farmington UT, US
David R. Miller - Morgan UT, US

Hema Metrics, Inc. - Kaysville UT

A61B005/00

600331, 600310

An optical sensor includes photoemitter and photodetector elements at multiple spacings (d, d) for the purpose of measuring the bulk absorptivity (α) of an area immediately surrounding and including a hemodialysis access site, and the absorptivity (α) of the tissue itself. At least one photoemitter element and at least one photodetector element are provided, the total number of photoemitter and photodetector elements being at least three. The photoemitter and photodetector elements are collinear and alternatingly arranged, thereby allowing the direct transcutaneous determination of vascular access blood flow.

2011008, Apr 7, 2011

Aug 31, 2010

12/871908

Michael L. BAILEY - Gig Harbor WA, US
David A. BELL - Farmington UT, US
Douglas P. HANSEN - Spanish Fork UT, US
Barry M. LUNT - Provo UT, US

G11B 27/36

369 532, G9B 27052

Methods and systems for the rapid evaluation of optical media reliability are disclosed. Simultaneous exposure of optical media to heat, humidity, and light has been found to be an effective test to differentiate more stable media from less stable media in a reasonable amount of time.

2010025, Oct 14, 2010

Apr 13, 2010

12/759207

J. Clair Batty - Logan UT, US
Craig E. Cox - Fruit Heights UT, US
David A. Bell - Farmington UT, US

A01G 1/00, B01D 53/14, B01D 53/73, A47G 5/00

47 14, 95235, 95206

Stack gases of a burner, such as a power plant or other combustion source, may be remediated by a captive algae farm cycling some portion of the stack gases through a scrubber, and ultimately out into a manifold feeding a farm composed of tubes hosting the growth of algae. Liquids from the scrubber, including water capturing volatile organic compounds, solid particulates, nitrogen compounds, sulfur compounds, carbon dioxide, and the like, remediate the water and feed the algae farm. Meanwhile, the vapors and other gases provide an environment rich in water vapor, nitrogen compounds acting as fertilizer, and carbon dioxide to feed the algae to promote increased rates of growth. The algae may be recycled as a fuel itself, or may be harvested for use as a soil amendment to enrich the organic content of soils.

2004011, Jun 17, 2004

Dec 9, 2003

10/730000

Robert Steuer - Pleasant View UT, US
David Bell - Farmington UT, US
David Miller - Morgan UT, US

A61B005/02

600/504000, 600/310000

An optical sensor includes photoemitter and photodetector elements at multiple spacings (d, d) for the purpose of measuring the bulk absorptivity () of an area immediately surrounding and including a hemodialysis access site, and the absorptivity () of the tissue itself. At least one photoemitter element and at least one photodetector element are provided, the total number of photoemitter and photodetector elements being at least three. The photoemitter and photodetector elements are collinear and alternatingly arranged, thereby allowing the direct transcutaneous determination of vascular access blood flow.