Patents Assigned to Davey Tree Expert Company
  • Patent number: 11946215
    Abstract: A system is provided for shoreline stabilization having at least five rectangular shoreline stabilization devices; wherein a first two of the devices are arranged on opposite sides of a line running perpendicular to the first two devices; at least one of the devices is positioned perpendicular to and on top or in between the first two devices, and atop the line; and wherein a second two of the devices are each positioned at an angle relative to the first two devices to provide two angled devices, with a first end on top of one of the first two devices and a second end resting on at least one of the perpendicular devices to form an angle between a slope of between about 1.5:1 and 2:1, wherein the two angled devices are not resting on the same one of the first two devices.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: April 2, 2024
    Assignee: The Davey Tree Expert Company
    Inventors: Frederick Worth Creech, Jr., Mary-Margaret Sykes McKinney
  • Publication number: 20120210760
    Abstract: Phosphorus-free or low phosphorus fertilizer compositions containing a polyamino acid salt. The fertilizer formulations disclosed herein contain a nitrogen source, a potassium source, a polyamino acid salt and in some cases a low level source of phosphorus. The compositions may be in the form dry homogeneous blends and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 23, 2012
    Applicant: THE DAVEY TREE EXPERT COMPANY
    Inventor: Roger Funk
  • Patent number: 7534280
    Abstract: High analysis fertilizer formulations of a low bulk density powdered ureaformaldehyde, having soluble and insoluble components combined with soluble monopotassium phosphate and polyamino acid in which the resulting mixtures are dry homogeneous blends and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: May 19, 2009
    Assignee: The Davey Tree Expert Company
    Inventor: Roger Funk
  • Patent number: 4908983
    Abstract: An apparatus for injecting fluid under pressure into trees having a base and a plurality of cylinders supported by the base for receiving injection fluid. Each cylinder has a first end, a piston reciprocable in the cylinder for injecting fluid from the cylinder into a tree, an opening when the piston is moved to a position away from the first end of the cylinder, and an independent injector. Each cylinder also includes an actuator connected to the piston for moving the piston toward and away from the first end, and having an adjustor for selecting the amount of fluid to be injected. First and second conduits are connected to the first end of the cylinders. The first conduits are in communication with a reservoir of injection fluid and the second conduits are in communication with the injectors. A plurality of third conduits are also included, and are in communication with the cylinders when the piston is moved to a location away from the first end. The third conduits are in communication with the reservoir.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: March 20, 1990
    Assignee: The Davey tree Expert Company
    Inventors: Gregory Mazur, Willard P. Frissell
  • Patent number: 4529000
    Abstract: A volume proportioning system includes a pressurized supply of a primary carrier liquid, one or more sources of concentrate, a proportioning interconnection between the carrier liquid and the sources of concentrate by which the proportions are controlled regardless of the flow rate or pressure of the carrier liquid, in which the carrier liquid also provides the motive power for moving the concentrate and the carrier liquid itself to an operator controlled discharge point, the discharge being infinitely variable under the control of an operator.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: July 16, 1985
    Assignee: Davey Tree Expert Company
    Inventor: Roger C. Funk
  • Patent number: 4089670
    Abstract: High analysis fertilizer formulations of a low bulk density powdered ureaform having soluble and insoluble components combined with soluble monopotassium phosphate in which the resulting mixtures are dry homogeneous blends that are free of fillers and binding agents and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.
    Type: Grant
    Filed: May 24, 1977
    Date of Patent: May 16, 1978
    Assignee: The Davey Tree Expert Company
    Inventor: Roger Calvin Funk
  • Patent number: 4036627
    Abstract: A high analysis fertilizer formulation of a low bulk density powdered ureaform having soluble and insoluble components combined with soluble monopotassium phosphate in which the resultant mixture is a dry homogeneous blend which is free of fillers and binding agents and may be carried in liquid for application to surface or subsurface areas by conventional liquid fertilizer applying equipment.
    Type: Grant
    Filed: November 21, 1975
    Date of Patent: July 19, 1977
    Assignee: The Davey Tree Expert Company
    Inventor: Roger Calvin Funk