Patents by Inventor Douglas A. Snowdon

Douglas A. Snowdon 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).

  • Temperature swing humidity collector using powerplant waste heat
    Patent number: 6863711
    Abstract: A system for recovering water from the atmosphere includes water sorbent assembly composed of a water adsorbent material and a heat exchanger. The water adsorbent material traps water present within the air drawn through the sorbent assembly. Once the sorbent assembly is fully saturated, exhaust gases generated from a power plant are routed through a heat exchanger in thermal contact with the water adsorbent material to remove water within the sorbent assembly into a condenser, and from the condenser to a water storage container.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: March 8, 2005
    Assignee: Hamilton Sundstrand
    Inventors: Stephen Tongue, Douglas Snowdon
  • Temperature swing humidity collector using powerplant waste heat
    Publication number: 20040107832
    Abstract: A system for recovering water from the atmosphere includes water sorbent assembly composed of a water adsorbent material and a heat exchanger. The water adsorbent material traps water present within the air drawn through the sorbent assembly. Once the sorbent assembly is fully saturated, exhaust gases generated from a power plant are routed through a heat exchanger in thermal contact with the water adsorbent material to remove water within the sorbent assembly into a condenser, and from the condenser to a water storage container.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Inventors: Stephen Tongue, Douglas Snowdon
  • Process employing thermally sterilizable aqueous polishing agents
    Patent number: 5518626
    Abstract: The present invention provides a system and a process for removing contaminants such as CO.sub.2 and mobile cations and anions from aqueous solutions. The system and the process contemplate the use of thermally sterilizable aqueous polishing agents such as thermally sterilizable ion exchange resins and as a result, the need for chemical and/or mechanical microbial control or inhibition techniques is obviated. Therefore, the present invention will be especially useful in submarine and spacecraft applications where the need exists for reduced weight and volume water processing systems.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: May 21, 1996
    Assignee: United Technologies Corporation
    Inventors: Philip J. Birbara, Timothy A. Nalette, Douglas A. Snowdon
  • Breathing system
    Patent number: 5111809
    Abstract: A respiratory apparatus, which receives exhaled gas from a user, removes carbon dioxide from and introduces oxygen into the exhaled gas, to present a breathing gas to a user. A respiratory flow transducer in the respiratory apparatus is subjected to the breathing gas demand of the user. Oxygen is introduced into the breathing system by an oxygen flow regulator connected to an oxygen supply inlet. The respiratory flow transducer and the oxygen flow regulator are connected by a linkage. The linkage constrains the oxygen flow regulator and respiratory flow transducer to operate together whereby there is a substantially constant ratio between the breathing gas flow rate and the oxygen flow rate.An air bleed system can be connected to an air inlet to introduce air into the respiratory apparatus and to displace a portion of the gas from the respiratory apparatus.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: May 12, 1992
    Assignee: Avstar Aerospace Corporation
    Inventors: Bruce B. Gamble, Douglas A. Snowdon