Patents Assigned to Nash Engineering Company
  • Evacuation system with precondenser
    Patent number: 4315717
    Abstract: A high capacity evacuation system employing a precondenser receiving process fluids having liquid and gaseous phases, a first stage jet diffuser and a second stage liquid ring pump for handling the process fluids and in which system the motivating fluid for the jet diffuser is air; seal liquid is continuously fed from a seal liquid source outside the system; and the piping between the components of the system is unobstructed.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: February 16, 1982
    Assignee: The Nash Engineering Company
    Inventor: Stephen J. King
  • Monitoring machinery by detecting vibrations
    Patent number: 4257747
    Abstract: A piece of machinery which, in an abnormal operating condition exhibits a vibration frequency characteristic of or peculiar to that condition, is monitored by securing a spring and mass unit to the machinery, the spring and mass unit having a natural frequency equal to said vibration frequency so that upon the occurence of the abnormal condition the magnified vibration of the spring and mass unit can be used to effect a control function or sound an alarm.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: March 24, 1981
    Assignee: The Nash Engineering Company
    Inventor: Steven A. Goldman
  • Production of phosphates
    Patent number: 4228140
    Abstract: Various stages of the process of producing phosphates are subject to a vacuum produced by a liquid ring pump in various materials of construction using relatively high concentrations of sulfuric acid as the compressant liquid.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: October 14, 1980
    Assignee: The Nash Engineering Company
    Inventor: Stephen J. King
  • Long liquid ring pumps and compressors
    Patent number: 4172694
    Abstract: A liquid ring vacuum pump or compressor in which the port members open to the buckets of the rotor intermediate to the ends of the rotor so that the ratio of the axial length of the pump to the diameter can be relatively high.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: October 30, 1979
    Assignee: The Nash Engineering Company
    Inventor: Harold K. Haavik
  • Liquid ring pumps and compressors using a ferrofluidic ring liquid
    Patent number: 4050851
    Abstract: Liquid ring compressors and pumps using a ferrofluidic ring liquid are disclosed there being electrical coil means disposed around the compressor or pump casing to induce a field in the ferrofluidic ring liquid causing that liquid to form a rotating ring within the casing to drive the rotor.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: September 27, 1977
    Assignee: The Nash Engineering Company
    Inventor: Harold K. Haavik
  • Insert for movable diaphragm type flow control valve
    Patent number: 3958603
    Abstract: A movable diaphragm liquid flow control valve in which a retaining member is disposed in the housing upstream of the diaphragm so that when a back-flow occurs the diaphragm is prevented from blowing back along the pipework, within which the valve is disposed, and is guided to prevent it from tilting.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: May 25, 1976
    Assignee: The Nash Engineering Company
    Inventors: John Bannon, Steve Goldman, Richard A. Lametto
  • Liquid ring pump lobe purge
    Patent number: RE29747
    Abstract: Purging passages are machined or cast into the casing of a liquid ring compressor through which soluble or nonsoluble contaminants which may be present in the liquid ring may be removed from the compressor. These passages in single lobe pumps are located in the outer peripheral zones of the casing approximately 240.degree. from the pump land in the direction of rotation of the rotor in the area of the drive and idle ends of the rotor.
    Type: Grant
    Filed: March 21, 1977
    Date of Patent: August 29, 1978
    Assignee: Nash Engineering Company
    Inventors: Kenneth W. Roe, Ernest E. Studwell, Robert E. Cooke