Patents by Inventor Theodore B. Hill

Theodore B. Hill has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6651658
    Abstract: The present invention is directed to a portable oxygen concentrator system adapted to be transported by a user. The portable oxygen concentrator system includes an energy source, an air separation device powered by the energy source and adapted to convert ambient air into concentrated oxygen gas for the user, at least one sensor adapted to sense one or more conditions indicative of the oxygen gas needs of the user, and a control unit interrelated with the air separation device and the at least one sensor to control the air separation device so as to supply an amount of oxygen gas equivalent to the oxygen gas needs of the user based at least in part upon the one or more conditions sensed by the at least one sensor.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: November 25, 2003
    Assignees: SeQual Technologies, Inc., Teijin Limited
    Inventors: Theodore B. Hill, Edward A. Radtke, Robert A. Schneider, James A. Bixby
  • Patent number: 6629525
    Abstract: The present invention is directed to a portable oxygen concentrator system adapted to be transported by a user. The portable oxygen concentrator system includes an energy source, an air separation device powered by the energy source and adapted to convert ambient air into concentrated oxygen gas for the user, at least one sensor adapted to sense one or more conditions indicative of the oxygen gas needs of the user, and a control unit interrelated with the air separation device and the at least one sensor to control the air separation device so as to supply an amount of oxygen gas equivalent to the oxygen gas needs of the user based at least in part upon the one or more conditions sensed by the at least one sensor.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: October 7, 2003
    Assignee: SeQual Technologies, Inc.
    Inventors: Theodore B. Hill, Edward A. Radtke, Robert A. Schneider, James A. Bixby
  • Patent number: 6471744
    Abstract: The present invention involves a vacuum-pressure swing adsorption process for the separation of components of a fluid mixture. The process includes (a) transferring a fluid mixture through an adsorbent bed at an elevated pressure Ph so as to produce a purified product fluid; (b) venting the adsorbent bed down to an ambient fluid pressure Pa; (c) applying a vacuum force to the adsorbent bed to bring the adsorbent bed to a reduced pressure Pl; and (d) venting the adsorbent bed up to an ambient fluid pressure Pa.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: October 29, 2002
    Assignee: SeQual Technologies, Inc.
    Inventor: Theodore B. Hill
  • Patent number: 6457485
    Abstract: The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving action for selectively transferring fluids therethrough. The second valve member has a first fluid section with at least one aperture adapted for transferring a first fluid of a first pressure and composition therethrough and a second fluid section with at least one aperture adapted for transferring a second fluid of a second pressure and composition therethrough. The first valve member has a first fluid section with at least one passage for transferring the first fluid in the valve assembly and a second fluid section with at least one passage for transferring the second fluid in the valve assembly.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: October 1, 2002
    Assignee: SeQual Technologies, Inc.
    Inventors: Theodore B. Hill, Charles C. Hill, Adam C. Hansen
  • Publication number: 20020124885
    Abstract: The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving action for selectively transferring fluids therethrough. The second valve member has a first fluid section with at least one aperture adapted for transferring a first fluid of a first pressure and composition therethrough and a second fluid section with at least one aperture adapted for transferring a second fluid of a second pressure and composition therethrough. The first valve member has a first fluid section with at least one passage for transferring the first fluid in the valve assembly and a second fluid section with at least one passage for transferring the second fluid in the valve assembly.
    Type: Application
    Filed: May 10, 2002
    Publication date: September 12, 2002
    Applicant: Sequal Technologies, Inc.
    Inventors: Theodore B. Hill, Charles C. Hill, Adam C. Hansen
  • Publication number: 20020096174
    Abstract: The present invention is directed to a portable oxygen concentrator system adapted to be transported by a user. The portable oxygen concentrator system includes an energy source, an air separation device powered by the energy source and adapted to convert ambient air into concentrated oxygen gas for the user, at least one sensor adapted to sense one or more conditions indicative of the oxygen gas needs of the user, and a control unit interrelated with the air separation device and the at least one sensor to control the air separation device so as to supply an amount of oxygen gas equivalent to the oxygen gas needs of the user based at least in part upon the one or more conditions sensed by the at least one sensor.
    Type: Application
    Filed: March 25, 2002
    Publication date: July 25, 2002
    Inventors: Theodore B. Hill, Edward A. Radtke, Robert A. Schneider, James A. Bixby
  • Publication number: 20010047824
    Abstract: The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving action for selectively transferring fluids therethrough. The second valve member has a first fluid section with at least one aperture adapted for transferring a first fluid of a first pressure and composition therethrough and a second fluid section with at least one aperture adapted for transferring a second fluid of a second pressure and composition therethrough. The first valve member has a first fluid section with at least one passage for transferring the first fluid in the valve assembly and a second fluid section with at least one passage for transferring the second fluid in the valve assembly.
    Type: Application
    Filed: August 8, 2001
    Publication date: December 6, 2001
    Applicant: Sequal Technologies, Inc.
    Inventors: Theodore B. Hill, Charles C. Hill, Adam C. Hansen
  • Patent number: 6311719
    Abstract: The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving action for selectively transferring fluids therethrough. The second valve member has a first fluid section with at least one aperture adapted for transferring a first fluid of a first pressure and composition therethrough and a second fluid section with at least one aperture adapted for transferring a second fluid of a second pressure and composition therethrough. The first valve member has a first fluid section with at least one passage for transferring the first fluid in the valve assembly and a second fluid section with at least one passage for transferring the second fluid in the valve assembly.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: November 6, 2001
    Assignee: Sequal Technologies, Inc.
    Inventors: Theodore B. Hill, Charles C. Hill, Adam C. Hansen
  • Patent number: 5979440
    Abstract: The present invention is directed to a much safer and less expensive way of providing portable oxygen from a gas concentrator for patients who do not want to be tied to a stationary machine or restricted by present oxygen technology. In one preferred embodiment, the present invention splits off some of the excess capacity gas flow from a gas concentrator which is then stored via liquefaction. The stored gas can then be used as a portable supply. A portion of the oxygen gas flow generated by the oxygen concentrator is channeled to a condenser which receives and liquefies the oxygen gas using cryocooler. A storage dewar is used for storing the oxygen liquefied by the condenser. Liquid is then selectively transferred to a smaller portable dewar. A controller can be used for monitoring the parameters of liquefaction, including oxygen concentration, the amount of liquid oxygen in the dewar, and for controlling the parameters of liquid oxygen generation and transfer.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: November 9, 1999
    Assignee: Sequal Technologies, Inc.
    Inventors: Scott C. Honkonen, Theodore B. Hill, Charles C. Hill, Graham Walker
  • Patent number: 5730778
    Abstract: A rotary valve at the inlets of a plurality of columns cyclically (1) selects first columns on a cyclic basis to receive compressed air, adsorb nitrogen and other components in the compressed air and pass oxygen and argon to a user (e.g. patient), second columns to desorb the adsorbed components in such columns and (3) third columns to equalize pressures where the first columns change progressively to the second columns and vice versa. A compressor having adjustable characteristics and regulated in an open or closed loop introduces the compressed air through the valve to the first columns to provide an adjustable air flow for obtaining a prescribed oxygen flow to the user. An indication may be provided when the compressor characteristics regulated for obtaining the prescribed oxygen flow rate are outside particular limits. The valve may have a variable speed related to the compressor flow variations to regulate the air pressure in the columns in accordance with the air flow rate into the columns.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: March 24, 1998
    Assignee: SeQual Technologies, Inc.
    Inventors: Charles C. Hill, Theodore B. Hill
  • Patent number: 5593478
    Abstract: A rotary valve at the inlets of a plurality of columns cyclically (1) selects first columns on a cyclic basis to receive compressed air, adsorb nitrogen and other components in the compressed air and pass oxygen and argon to a user (e.g. patient), second columns to desorb the adsorbed components in such columns and (3) third columns to equalize pressures where the first columns change progressively to the second columns and vice versa. A compressor having adjustable characteristics and regulated in an open or closed loop introduces the compressed air through the valve to the first columns to provide an adjustable air flow for obtaining a prescribed oxygen flow to the user. An indication may be provided when the compressor characteristics regulated for obtaining the prescribed oxygen flow rate are outside particular limits. The valve may have a variable speed related to the compressor flow variations to regulate the air pressure in the columns in accordance with the air flow rate into the columns.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: January 14, 1997
    Assignee: Sequal Technologies, Inc.
    Inventors: Charles C. Hill, Theodore B. Hill
  • Patent number: 5366541
    Abstract: Improved apparatus for fractionating fluid mixtures by pressure swing molecular adsorption employing a rotary distributor valve and an array of adsorber columns. The columns are, in one embodiment, contained within a product holding tank or, in another embodiment, attached to a product tank. The valve sequences to provide a quasi steady-state flow, allowing optimization of adsorption/desorption cycles, and eliminating most of the valves, switches and plumbing usually required.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: November 22, 1994
    Assignee: Dynotec Corporation
    Inventors: Charles C. Hill, Theodore B. Hill
  • Patent number: 5268021
    Abstract: Improved apparatus for fractionating fluid mixtures by pressure swing molecular adsorption employing a rotary distributor valve and an array of adsorber columns. The columns are, in one embodiment, contained within a product holding tank or, in another embodiment, attached to a product tank. The valve sequences to provide a quasi steady-state flow, allowing optimization of adsorption/desorption cycles, and eliminating most of the valves, switches and plumbing usually required.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: December 7, 1993
    Assignee: Dynotec Corporation
    Inventors: Charles C. Hill, Theodore B. Hill
  • Patent number: 4951554
    Abstract: A diaphragm for a diaphragm-type piston characterized by an S-shaped or ogee-like profile approximating a theoretical model that is substantially free of distortion in a selected position of the piston assembly in which a convolution is formed in the annular space between the diaphragm piston and the body in which the piston operates. Being molded without a convolution, the diaphragm lends itself well to maintaining a reinforcing fabric centrally embedded within the diaphragm proper, while at the same time being substantially distortion-free in a selected position of the piston assembly.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: August 28, 1990
    Assignee: American Standard Inc.
    Inventors: Daniel G. Scott, William K. Mong, Mark S. Krampitz, Theodore B. Hill, Willard P. Spalding
  • Patent number: 4915018
    Abstract: A diaphragm piston assembly in which an annular ring member is provided, preferably at the outer clamping periphery of the diaphragm between the underside of the diaphragm and body, to exert a force on the diaphragm in the direction of the cover that clamps the diaphragm to the body, thereby encouraging the diaphragm convolution to assume a disposition in a preferred direction corresponding to the direction in which the convolution is predisposed by the inherent "spring effect" of the diaphragm.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: April 10, 1990
    Assignee: American Standard Inc.
    Inventors: Daniel G. Scott, Theodore B. Hill
  • Patent number: 4887516
    Abstract: A diaphragm clamping arrangement for assembly of a diaphragm-type piston in the body of a valve device or the like such that the diaphragm is biased in a direction to cause the diaphragm convolution to assume a preferred disposition in which a desired diaphragm "spring effect" is maintained.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: December 19, 1989
    Assignee: American Standard Inc.
    Inventors: Daniel G. Scott, Theodore B. Hill
  • Patent number: 4850654
    Abstract: An improved freight brake emergency valve device providing improved stability against undesired emergency brake applications without degradation of emergency sensitivity. This is achieved, in one aspect of the invention, by introducing a spring force on the emergency piston as the piston approaches emergency position to thereby retard the piston momentum suffiently to allow a random brake pipe pressure fluctuation to dissipate. In another aspect of the invention, a choke and check valve are arranged to create a dashpot effect to retard piston momentum resulting from a random brake pipe pressure fluctuation.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: July 25, 1989
    Assignee: American Standard Inc.
    Inventors: James E. Hart, Edward W. Gaughan, Theodore B. Hill
  • Patent number: 4819993
    Abstract: A freight brake control valve device having an improved quick service function provided by suppressing premature cut off operation of the quick service limiting valve. In one embodiment of the invention, this is accomplished by connecting the quick service volume pressure to the underside of the quick service limiting valve piston during preliminary quick service to counteract the pressure pulse on the opposite side of the piston that occurs during the transition between the preliminary and secondary stages of quick service. In a second embodiment, pressure is created at the underside of the quick service limiting valve piston by dashpot action of the piston itself.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: April 11, 1989
    Assignee: American Standard Inc.
    Inventors: Edward W. Gaughan, Theodore B. Hill
  • Patent number: 4783124
    Abstract: A freight brake control valve device having an improved quick service function achieved by providing an additional volume upstream of the quick service limiting valve with which the brake pipe fluid under pressure is equalized during the second stage of quick service to achieve an intensified secondary quick service reduction of brake pipe pressure. Further, a smooth and continuous local reduction of brake pipe pressure occurs without any time lag at the time of transition from preliminary to secondary stage quick service. In a first embodiment of the invention, an exhaust passage separate from the brake cylinder exhaust passage is provided to assure venting of this additional volume in the event the brake cylinder retainer valve is set up. In a second embodiment, the additional volume is vented via the brake cylinder exhaust passage.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: November 8, 1988
    Assignee: American Standard Inc.
    Inventors: Edward W. Gaughan, Theodore B. Hill
  • Patent number: 4776642
    Abstract: A freight brake control valve device having an improved quick service function achieved by utilizing a common quick service volume during secondary quick service as well as preliminary quick service, in order to achieve an intensified secondary quick service reduction of brake pipe pressure. Further, a continuing local reduction of break pipe pressure is obtained without any time lag during transition from preliminary to secondary stage quick service. In a first embodiment of the invention, an exhaust passage separate from the brake cylinder exhaust passage is provided to assure venting of the preliminary quick service volume in the event the brake cylinder retainer valve is set up. In a second embodiment, the additional volume is vented via the brake cylinder exhaust passage.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: October 11, 1988
    Assignee: American Standard Inc.
    Inventors: James E. Hart, Edward W. Gaughan, Theodore B. Hill