Patents by Inventor Alton K. Allen

Alton K. Allen 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).

  • Occlusion detection means for a persistaltic pump
    Patent number: 6149394
    Abstract: A peristaltic pump delivering a medicant through a plastic tube with an appropriate wall thickness to withstand external rubbing contact with the rotating rotor of the pump, in which downstream of the rotor a tubing length is used in the plastic tube having a thinner wall thickness so that when a downstream occulsion is detected, the pressure build-up transmitted upstream to the tubing length more readily causes it to undergo an expansion radially because of its thinner wall to actuate an on-off switch of the peristaltic pump.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: November 21, 2000
    Inventor: Alton K. Allen
  • Piezoelectric valve
    Patent number: 4903732
    Abstract: A piezoelectric valve for controlling fluid flow through valve ports comprises a fluidtight valve body and a diaphragm. The valve body defines valve ports, and the diaphragm includes a plurality of piezoelectric members, the members being adapted to be selectively piezoelectrically deflected in opposite directions in a plane of operation thereof to produce a cumulative excursion to selectively block or unblock the valve ports. The enhanced cumulative excursion enables valve ports of greater cross-sectional area to be employed.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: February 27, 1990
    Assignee: A. K. Allen Company
    Inventor: Alton K. Allen
  • Water sensing alarm
    Patent number: D261243
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: October 13, 1981
    Assignee: Datasonic, Inc.
    Inventors: Richard P. Mintz, Ronald A. Buttner, Alton K. Allen