Patents by Inventor Francis X. Crowley

Francis X. Crowley 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).

  • Concrete tank
    Patent number: 4270323
    Abstract: A prestressed concrete tank with a wall of precast concrete panels surrounded by a cast-in-place beam, the beam and panels being prestressed by metal members in tension, encased within or placed around the outside of the beam.
    Type: Grant
    Filed: May 3, 1979
    Date of Patent: June 2, 1981
    Inventor: Francis X. Crowley
  • Concrete tank joint
    Patent number: 4142339
    Abstract: A wall-base joint for a concrete tank is constructed by providing in a base a groove larger than the width of a tank wall, placing the wall in the groove to leave a groove portion on each side of the wall, prestressing the wall with a first compressive force, filling the inner (with respect (with respect to the center line of the base) groove portion with concrete and curing it to form a first plug therein, prestressing the wall further with a second compressive force to counteract a fraction of the bending moments produced by the liquid in the tank when it is full, and filling the outer groove portion with concrete and curing it to form a second plug to lock the inner plug into permanent compression.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: March 6, 1979
    Inventor: Francis X. Crowley
  • Concrete tank
    Patent number: 4126976
    Abstract: A prestressed concrete tank comprising a wall of precast concrete panels, cast continuous beams surrounding the wall of panels, the beams including metal prestressing means, and vertically spaced liquid barriers positioned between the inside of the tank and the prestressing means.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: November 28, 1978
    Inventor: Francis X. Crowley
  • Method of constructing a concrete tank joint
    Patent number: 4078354
    Abstract: A wall-base joint for a concrete tank is constructed by providing in a base a groove larger than the width of a tank wall, placing the wall in the groove to leave a groove portion on each side of the wall, prestressing the wall with a first compressive force, filling the inner (with respect to the center line of the base) groove portion with concrete and curing it to form a first plug therein, prestressing the wall further with a second compressive force to counteract a fraction of the bending moments produced by the liquid in the tank when it is full, and filling the outer groove portion with concrete and curing it to form a second plug to lock the inner plug into permanent compression.
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: March 14, 1978
    Inventor: Francis X. Crowley
  • Concrete tank of precast concrete panels with pretensioning beam means
    Patent number: 4015383
    Abstract: A tank constructed of either cast-in-place concrete, or of precast panels of concrete which are separated from each other around the periphery of the tank with the open spaces between the panels being filled with concrete filler units poured in place. One or more collar-like horizontally-lying concrete beams surround the wall of the tank and reinforce it. Each beam is reinforced by one or more tendons encased within the beam.
    Type: Grant
    Filed: May 9, 1975
    Date of Patent: April 5, 1977
    Inventor: Francis X. Crowley
  • Concrete tank of precast concrete panels with pretensioned beam means
    Patent number: RE29777
    Abstract: A tank constructed of either cast-in-place concrete, or of precast panels of concrete which are separated from each other around the periphery of the tank with the open spaces between the panels being filled with concrete filler units poured in place. One or more collar-like horizontally-lying concrete beams surround the wall of the tank and reinforce it. Each beam is reinforced by one or more tendons encased within the beam.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: September 26, 1978
    Inventor: Francis X. Crowley