Patents by Inventor Keith L. Vacha

Keith L. Vacha 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).

  • Water purification method and apparatus with conductivity sensing controls
    Patent number: 4975154
    Abstract: A distillation type of water purification system has a raw water inlet valve for admitting raw water continuously to a boiling tank at a rate greater than the rate at which raw water is converted to treated water. A drain valve located at the bottom of the boiling tank is energized by a raw water level sensing means whenever the raw water level reaches a predetermined level, to discharge water from the boiling tank. Treated water is stored in a storage tank having a pump for discharging treated water to the user upon demand. A single conductivity sensor in the storage tank controls the pump to allow it to operate only if the sensed conductivity is above a first predetermined value but not at or above a second predetermined value greater than the first value. An improved condenser has two sets of tubes, each set is arranged in a pair of planes oriented transverse the flow of cooling air with the tubes parallel. The internal cross-sectional area of one set is about twice that of the other.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: December 4, 1990
    Assignee: Pure Water, Inc.
    Inventors: David G. Palmer, David J. Shannon, Keith L. Vacha
  • Water purification method and apparatus
    Patent number: 4888097
    Abstract: A distillation type of water purification system has a raw water inlet valve for admitting raw water continuously to a boiling tank at a rate greater than the rate at which raw water is converted to treated water. A drain valve located at the bottom of the boiling tank is energized by a raw water level sensing device whenever the raw water level reaches a predetermined level, to discharge water from the boiling tank. Treated water is stored in a storage tank having a pump for discharging treated water to the user upon demand. A single conductivity sensor in the storage tank controls the pump to allow it to operate only if the sensed conductivity is above a first predetermined value but not at or above a second predetermined value greater than the first value. An improved condenser has two sets of tubes, each set is arranged in a pair of planes oriented transverse the flow of cooling air with the tubes parallel. The internal cross-sectional area of one set is about twice that of the other.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: December 19, 1989
    Assignee: Pure Water, Inc.
    Inventors: David G. Palmer, David J. Shannon, Keith L. Vacha
  • Condenser for water purification apparatus
    Patent number: 4805692
    Abstract: A distillation type of water purification system has a raw water inlet valve for admitting raw water continuously to a boiling tank at a rate greater than the rate at which raw water is converted to treated water. A drain valve located at the bottom of the boiling tank is energized by a raw water level sensing means whenever the raw water level reaches a predetermined level, to discharge water from the boiling tank. Treated water is stored in a storage tank having a pump for discharging treated water to the user upon demand. A single conductivity sensor in the storage tank controls the pump to allow it to operate only if the sensed conductivity is above a first predetermined value but not at or above a second predetermined value greater than the first value. An improved condenser has two sets of tubes, each set is arranged in a pair of planes oriented transverse the flow of cooling air with the tubes parallel. The internal cross-sectional area of one set is about twice that of the other.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: February 21, 1989
    Assignee: Pure Water, Inc.
    Inventors: David G. Palmer, Keith L. Vacha
  • Water distillation unit
    Patent number: D306338
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: February 27, 1990
    Assignee: Pure Water, Inc.
    Inventors: Dale A. Rempe, David J. Shannon, Keith L. Vacha