Patents by Inventor Harry E. Pinkerton

Harry E. Pinkerton 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).

  • Patent number: 7785084
    Abstract: A pumping apparatus for pumping a liquid from a source to a target includes a pump having a pump housing and a pump piston. The pump housing defines a central longitudinal bore, a transverse bore communicating with the central bore for conveying a liquid through the pump housing and a liquid reservoir communicating with the central bore and the transverse bore for retaining an amount of the liquid conveyed through the transverse bore. The pump piston is axially and rotatably slidable within the central longitudinal bore for pumping the liquid through the transverse bore.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: August 31, 2010
    Assignee: Fluid Metering, Inc.
    Inventors: David Rawlings, Harry E. Pinkerton, III
  • Patent number: 7387502
    Abstract: A pumping apparatus for pumping a liquid from a source to a target including a motor, a first pump driven by the motor, a second pump driven by the motor and a separator in fluid communication with the first and second pump for separating a liquid received from a source into a gaseous component and a liquid component. The separator further diverts the gaseous component to the first pump and the liquid component to the second pump, wherein the first pump pumps the gaseous component back to the source and the second pump pumps the liquid component to a target.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: June 17, 2008
    Assignee: Fluid Metering, Inc.
    Inventors: David Rawlings, Harry E. Pinkerton, III
  • Publication number: 20040241023
    Abstract: A metering pump for providing relatively small, precise volumes of fluid is provided. The pump piston and/or the interior of the cylinder has a surface finish exhibiting a roughness average within selected limits and a vapor deposited polymer such as polytetrafluoroethylene. A drive mechanism is provided for simultaneously rotating and reciprocating the piston within a cylindrical chamber. Fluid is thereby drawn into the chamber and expelled.
    Type: Application
    Filed: May 27, 2003
    Publication date: December 2, 2004
    Inventors: Harry E. Pinkerton, Carlos G. Holland
  • Patent number: 4941809
    Abstract: A valveless, variable displacement, reversible, fixed dead volume metering pump formed with a cylinder having ports through which to pump fluid. A rotatable piston is in the cylinder with a duct thereon communicable with the ports to transfer fluid to and from the cylinder. A drive coupling is provided for the piston. The piston reciprocates in the cylinder while rotating in a timed relation with respect to the ports and the timed relationship is reversible. The relative angularity between the axis of the piston and the axis of the drive coupling is reversible to obtain reversal of fluid flow with the degree of relative angularity determining the volume of fluid being pumped.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: July 17, 1990
    Inventor: Harry E. Pinkerton
  • Patent number: 4178240
    Abstract: A system for handling two liquid streams comprises an hydraulic circuit including a pair of receptacles each provided with movable partition means dividing it into first and second chambers. Rod means extending through a first chamber of each receptacle connects the partition means and is effective to cause reciprocation of one partition means to be repeated by the other so that as the first chamber of one receptacle is expanded, the first chamber of the other receptacle is contracted. A quantity of the first liquid is delivered alternately to the first and second chambers of one receptacle as those chambers expand. As those chambers contract first liquid is passed through conduit means from the first and second chambers of said one receptacle to the first and second chambers, respectively, of said other receptacle.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 11, 1979
    Inventor: Harry E. Pinkerton
  • Patent number: 4096059
    Abstract: Apparatus for accurately proportioning and mixing fluids comprising a double acting piston/cylinder unit of which the cylinder is divided into two chambers by the piston and the volume of the cylinder swept by the piston at one end of the piston is lesser than that at the other end. An inlet connection for a first fluid is made to one chamber, a conduit connects the two chambers and includes a connection to a source of the second fluid. Valve means are associated with the conduits and are effective to cause a charge of first fluid to be delivered to said one chamber and thereafter to be transferred to the other chamber drawing fluid from said source of second fluid to make up for the difference in the volumes of the chambers. Said valve means then cooperate to cause the mixed fluids to be discharged from the other chamber as said one chamber is again charged with said first fluid.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: June 20, 1978
    Inventor: Harry E. Pinkerton
  • Patent number: 4008003
    Abstract: There is disclosed a valveless positive displacement pump having a cylinder with a piston reciprocal and rotatable therein and dividing the cylinder into two working chambers. Inlet and outlet ports communicate with the working chambers and the piston has ducts at each end which are sequentially brought into register with the ports as the piston reciprocates and rotates in the cylinder to produce a pumping action in each chamber. A piston rod is secured to the piston and extends from one end of the piston through one of the working chambers to the outside of the cylinder and is connected to a drive mechanism. In certain embodiments of the invention illustrated, means are provided to equalize the output from the two chambers and in other embodiments the fact that the effective volumes of the chambers are unequal is utilized to achieve proportional joining, mixing or separation of fluids handled by the pump.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: February 15, 1977
    Inventor: Harry E. Pinkerton