Patents by Inventor DON D. DUFFIN

DON D. DUFFIN 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: 11358160
    Abstract: What is disclosed is a self governing speed control device for controlling the rotation speed of a sprinkler turbine. The device has a housing that houses a viscous fluid. An axle extends into the housing and is configured to rotate in the housing. The axle is fixedly attached to a primary drum that rotates with the axle. One or more hinge pins extends from the primary drum. A brake shoe is positioned on the hinge pin. The hinge pin passes into a slot in an actuation drum configured to rotate on the axle. The brake shoe is configured to expand and contract based on the speed of rotation of the axle in relation to the speed of rotation of the actuation drum.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: June 14, 2022
    Assignee: XCAD VALVE AND IRRIGATION, INC
    Inventors: Don D. Duffin, Roger M. Duffin
  • Patent number: 11213836
    Abstract: A sprinkler head for irrigation having a sprinkler body. The sprinkler body surrounds a fluid delivery tube. The sprinkler body includes an upper plate and a lower plate. A and exits out the fluid nozzle. A fluid distribution cage is positioned on the sprinkler body and around the fluid delivery tube. The fluid distribution cage has one or more arms connecting an upper plate and a lower plate. The lower plate is configured to direct fluid sprayed onto it from the fluid delivery tube. When fluid is sprayed on the lower plate the upper plate begins to nutate around the fluid delivery tube between the upper sprinkler body plate and lower sprinkler body plate. The upper and lower sprinkler body plates have races configured for receiving one or more resilient cushions positioned on the upper plate of the fluid distribution cage.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: January 4, 2022
    Inventors: Don D. Duffin, Roger M. Duffin
  • Publication number: 20200215556
    Abstract: A sprinkler head for irrigation having a sprinkler body. The sprinkler body surrounds a fluid delivery tube. The sprinkler body includes an upper plate and a lower plate. A and exits out the fluid nozzle. A fluid distribution cage is positioned on the sprinkler body and around the fluid delivery tube. The fluid distribution cage has one or more arms connecting an upper plate and a lower plate. The lower plate is configured to direct fluid sprayed onto it from the fluid delivery tube. When fluid is sprayed on the lower plate the upper plate begins to nutate around the fluid delivery tube between the upper sprinkler body plate and lower sprinkler body plate. The upper and lower sprinkler body plates have races configured for receiving one or more resilient cushions positioned on the upper plate of the fluid distribution cage.
    Type: Application
    Filed: December 2, 2019
    Publication date: July 9, 2020
    Inventors: DON D. DUFFIN, ROGER M. DUFFIN
  • Publication number: 20200078805
    Abstract: What is disclosed is a self governing speed control device for controlling the rotation speed of a sprinkler turbine. The device has a housing that houses a viscous fluid. An axle extends into the housing and is configured to rotate in the housing. The axle is fixedly attached to a primary drum that rotates with the axle. One or more hinge pins extends from the primary drum. A brake shoe is positioned on the hinge pin. The hinge pin passes into a slot in an actuation drum configured to rotate on the axle. The brake shoe is configured to expand and contract based on the speed of rotation of the axle in relation to the speed of rotation of the actuation drum.
    Type: Application
    Filed: August 12, 2019
    Publication date: March 12, 2020
    Inventors: Don D. Duffin, Roger M. Duffin, Don D. Duffin, Roger M. Duffin
  • Patent number: 10201818
    Abstract: A rudder-directed tube delivery sprinkler head. A rudder configured to direct water into a tube, triggering distribution of water around an axis. Adjustable stoppers contact a rudder assembly, causing the rudder to pivot, directing water into a different tube and changing the direction of rotation.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: February 12, 2019
    Inventors: Don D. Duffin, Roger M. Duffin
  • Publication number: 20180263199
    Abstract: What are disclosed are embodiments of a saddle, cap, and adapter for use in an irrigation system. In a preferred embodiment, the disclosed inventive concepts utilize a dynamic seal that provides an improvement over prior known technology. In a preferred embodiment the adapter and cap are made to be removable so as to be easily changed or replaced.
    Type: Application
    Filed: March 19, 2018
    Publication date: September 20, 2018
    Inventors: Don D. Duffin, Roger M. Duffin
  • Publication number: 20180066764
    Abstract: A fast-acting valve for the control of fluid. The valve has two chambers, each with its own diaphragm. The valve, when filled with fluid will have equal pressure against both diaphragms which will allow little resistance for a poppet to open and close in >0.1 seconds. The poppet is attached to a rod which moves from a first position to a second position using low electric force or hydraulic power in combination with a biasing mechanism allowing for rapid toggling between two positions.
    Type: Application
    Filed: October 24, 2017
    Publication date: March 8, 2018
    Inventors: ROGER M. DUFFIN, DON D. DUFFIN
  • Publication number: 20170120265
    Abstract: A rudder-directed tube delivery sprinkler head. A rudder configured to direct water into a tube, triggering distribution of water around an axis. Adjustable stoppers contact a rudder assembly, causing the rudder to pivot, directing water into a different tube and changing the direction of rotation.
    Type: Application
    Filed: October 28, 2016
    Publication date: May 4, 2017
    Inventors: DON D. DUFFIN, ROGER M. DUFFIN