Patents by Inventor Andrew I. Lowenstein

Andrew I. Lowenstein 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).

  • Flat-plate absorbers and evaporators for absorption coolers
    Patent number: 6176101
    Abstract: An absorber and evaporator combination for use with an absorption heat pump (including chillers and air conditioners) as well as with other apparatus in which a vapor is absorbed by a liquid absorbent or a liquid or gas is cooled by evaporative cooling is disclosed. The absorber and evaporator are designed as vertical plates that can receive films of either absorbent (on the absorber) or refrigerant (on the evaporator) flowing down them. A liquid refrigerant is distributed across the top edge of each vertical surface of the evaporator. Likewise, for the absorber, a liquid absorbent is distributed across the top edge of each vertical surface. The distributors for the refrigerant and the absorbent are constructed and arranged so that they distribute their respective liquids without creating droplets. In one embodiment, two vertical evaporator surfaces and two vertical absorber surfaces are assembled into one absorber/evaporator panel.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: January 23, 2001
    Assignee: Gas Research Institute
    Inventor: Andrew I. Lowenstein
  • Thin plastic-film heat exchanger for absorption chillers
    Patent number: 5992508
    Abstract: A thin plastic-film heat exchanger element for apparatus, such as absorption chillers, is provided, having improved strengthening in the turning regions of the fluid passages, for enhanced resistance to bursting. A method of manufacture, for reduced wrinkling or pleating in the turning regions, is also disclosed.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: November 30, 1999
    Assignee: Gas Research Institute
    Inventors: Andrew I. Lowenstein, Marc J. Sibilia
  • Thin plastic-film heat exchanger for absorption chillers
    Patent number: 5634269
    Abstract: A thin plastic-film heat exchanger element for apparatus, such as absorption chillers, is provided, having improved strengthening in the turning regions of the fluid passages, for enhanced resistance to bursting. A method of manufacture, for reduced wrinkling or pleating in the turning regions, is also disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 3, 1997
    Assignee: Gas Research Institute
    Inventors: Andrew I. Lowenstein, Marc J. Sibilia
  • Low-flow internally-cooled liquid-desiccant absorber
    Patent number: 5351497
    Abstract: An air-conditioning process uses an internally-cooled, liquid-desiccant absorber through which the air to be conditioned, the coolant and the liquid desiccant are passed. The desiccant is passed into the absorber at a flooding rate not exceeding 1.0 gpm/ft.sup.2. Preferably cooling water (as coolant) is passed into the absorber at a flooding rate not exceeding 1.0 gpm/ft.sup.2 and, in that case, cooling air is passed through the absorber in intimate contact with the cooling water to promote evaporative cooling of the cooling water.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: October 4, 1994
    Assignee: Gas Research Institute
    Inventor: Andrew I. Lowenstein