Patents by Inventor Clifford W. Allen, Jr.

Clifford W. Allen, Jr. 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).

  • Fluid pressure sensor
    Patent number: 4669960
    Abstract: An actual pressure of a fluid having an ambient pressure as part thereof is sensed by a sensor. When the actual pressure decreases below a predetermined pressure, a signal is produced. If desired, the sensor may cause production of the signal when the actual pressure of the fluid exceeds a predetermined pressure.
    Type: Grant
    Filed: February 26, 1985
    Date of Patent: June 2, 1987
    Assignee: Lexair, Inc.
    Inventors: Clifford W. Allen, Jr., Ronn J. Leaf
  • Capacity control arrangement for fixed speed compressor
    Patent number: 4413951
    Abstract: A two-stage reciprocating compressor has its low pressure stage inlet connected to a source of gas generating a varying volume of gas. When the supply of gas generated is reduced to an extent that the pressure at the low pressure stage inlet decreases below a predetermined pressure, the compressor is unloaded at either the discharge outlet of its low pressure stage or the discharge output of its high pressure stage through opening a valve in a line connecting the discharge outlet of the low pressure or high pressure stage with the inlet of the low pressure stage.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: November 8, 1983
    Assignee: Lexair, Inc.
    Inventor: Clifford W. Allen, Jr.