Robert H Rowland

US Patent:

45164240, May 14, 1985

Filed:

Jul 9, 1982

Appl. No.:

6/396705

Inventors:

Robert O. Rowland - Hemet CA

Assignee:

Hudson Oxygen Therapy Sales Company - Temecula CA

International Classification:

G01N 3106

US Classification:

73 23

Abstract:

An improved oxygen concentrator includes an oxygen sensor, valve and timer for periodically directing a breathable gaseous mixture having increased oxygen concentration to the sensor. A preferred assembly includes an alarm and means for increasing oxygen concentration in the breathable gaseous mixture when the concentration falls below a selected concentration.

US Patent:

48395978, Jun 13, 1989

Filed:

Oct 8, 1987

Appl. No.:

7/105911

Inventors:

Robert O. Rowland - Hemet CA

Assignee:

Hudson Oxygen Therapy Sales Company - Temecula CA

International Classification:

G01N 2746

US Classification:

324433

Abstract:

The present invention is an improved method and apparatus for monitoring a battery supply by comparing the monitored battery voltage against average discharge information for the battery supply recommended for the apparatus, estimating battery life after receiving a prompt to do so and, automatically and periodically prompting the estimated battery life calculation.

US Patent:

46278605, Dec 9, 1986

Filed:

Mar 18, 1985

Appl. No.:

6/713339

Inventors:

Robert O. Rowland - Hemet CA

Assignee:

Hudson Oxygen Therapy Sales Company - Temecula CA

International Classification:

B01D 5304

US Classification:

55162

Abstract:

An improved oxygen concentrator assembly includes a microprocessor and cooperating means for monitoring or sensing functions and performance of various components of the concentrator. A test apparatus having means for selecting any of the functions monitored by the microprocessor is connected to the concentrator and displays the selected monitored functions for diagnosing performance levels and component problems or failures.

US Patent:

50998366, Mar 31, 1992

Filed:

Jan 17, 1990

Appl. No.:

7/467308

Inventors:

Robert O. Rowland - Hemet CA
Thomas C. Loescher - Encinitas CA

Assignee:

Hudson Respiratory Care Inc. - Temecula CA

International Classification:

A61M 1600

US Classification:

12820423

Abstract:

An improved system for delivering oxygen on demand to a user comprises a pressure transducer for sensing pressures during the breathing cycle of a user and for creating an electrical signal proportional to said sensed pressures, an electronic amplifier for amplifying the signal to at least 10,000 times the original signal strength, electronic filters for regulating the amplitude of the signal and for correcting the point of the signal where expiration stops and inspiration begins to correspond to zero respiratory pressure, an on/off switching circuit and cooperating valve drive circuit for switching to an on condition in response to a preselected first pressure and to an off condition in response to a preselected second pressure, and a valve driven by the valve drive circuit means for directing oxygen from an oxygen source to a user.

US Patent:

47794461, Oct 25, 1988

Filed:

Oct 13, 1987

Appl. No.:

7/107939

Inventors:

Robert O. Rowland - Hemet CA

Assignee:

Hudson Oxygen Therapy Sales Company - Temecula CA

International Classification:

G01N 2726
G01D 1800

US Classification:

73 1R

Abstract:

The present invention is an improved method and apparatus for condition sensing and displaying a numeric value associated with the sensed condition wherein the improvement comprises (1) circuitry calibrating the display of the numerical value associated with the sensed condition to a numerical value associated with the sensed condition in a normal ambient environment, while the sensor is within the normal ambient environment; and (2) circuitry for calibrating the display of the numerical value of the sensed condition to a numerical value associated with the sensed condition in a known offset environment which is different than the normal ambient environment, while the sensor is in the known offset environment. The calibration of the display of the numerical value associated with the sensed condition in the normal ambient environment and in the known offset environment aiding in protection from a slope error condition and an offset error condition in the display of the numerical value associated with the sensed condition. The calibration circuitry includes switching elements and a microprocessor.

US Patent:

D2498910, Oct 10, 1978

Filed:

Dec 6, 1976

Appl. No.:

5/747922

Inventors:

Robert O. Rowland - Hemet CA
Miguel A. Ruksenas - Fallbrook CA

Assignee:

Hudson Oxygen Therapy Sales Company - Temecula CA

International Classification:

D2402

US Classification:

D24 17

US Patent:

46488880, Mar 10, 1987

Filed:

Oct 31, 1985

Appl. No.:

6/793205

Inventors:

Robert O. Rowland - Hemet CA

Assignee:

Hudson Oxygen Therapy Sales Co. - Temecula CA

International Classification:

B01D 5304

US Classification:

55 21

Abstract:

An oxygen concentrator having one or more molecular sieve beds for selectively adsorbing nitrogen from atmospheric air for increasing the oxygen concentration of a product gas, a reservoir for receiving the product gas, a surge tank, a compressor for charging atmospheric air to the sieve beds and surge tank and a valve and valve switching means for directing atmospheric air from the compressor to the sieve beds and surge tank includes means for sensing the withdrawal rate of product gas from the reservoir and a microprocessor having means for switching the valve for charging the surge tank for a miniumum time required to achieve a product gas having a selected oxygen concentration at the sensed rate of withdrawal.

US Patent:

41897250, Feb 19, 1980

Filed:

May 10, 1977

Appl. No.:

5/795386

Inventors:

Robert O. Rowland - Hemet CA

Assignee:

Hudson Oxygen Therapy Sales Company - Temecula CA

International Classification:

G08B 2100
G08B 1710

US Classification:

340636

Abstract:

A condition monitoring system such as a hospital oxygen monitoring and analyzing device which is battery powered and of such low current drain circuitry that the monitor may be maintained ON continuously. The circuitry senses battery condition when the end of battery life is approaching as indicated by terminal voltage drop. The circuitry continues to provide an accurate display but also indicates a part of the display and additional symbol. The circuitry provides a separate indication under calibration conditions, and the improved voltage regulator includes a transistor back biased to breakdown as the regulation device. A remote sensor is used and engaging the sensor with the unit, automatically powers all circuitry.