Patents by Inventor Keith A. Krett

Keith A. Krett 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: 8459218
    Abstract: An adjustable-stroke solenoid valve assembly includes supply, control, and exhaust ports, an inner cavity having first and second seats, a solenoid coil, and a plunger assembly. The plunger assembly includes an armature shifted by the coil. The plunger assembly also includes a stem having a first end adjustably engaged with the armature, and a second end adjustably engaged with a poppet. The plunger assembly additionally includes a first surface that gets pressed against the first seat to block fluid flow to the control port when the coil is de-energized and a second surface that gets pressed against the second seat to facilitate fluid flow to the control port when the coil is energized. Adjustment of the stem's first end relative to the armature and of the poppet on the stem's second end establish a predetermined stroke for the plunger assembly and a predetermined fluid flow rate to the control port.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: June 11, 2013
    Assignee: Eaton Corporation
    Inventors: Robert D. Keller, Robert J. Boychuk, Keith A. Krett
  • Publication number: 20120291727
    Abstract: An adjustable-stroke solenoid valve assembly includes supply, control, and exhaust ports, an inner cavity having first and second seats, a solenoid coil, and a plunger assembly. The plunger assembly includes an armature shifted by the coil. The plunger assembly also includes a stem having a first end adjustably engaged with the armature, and a second end adjustably engaged with a poppet. The plunger assembly additionally includes a first surface that gets pressed against the first seat to block fluid flow to the control port when the coil is de-energized and a second surface that gets pressed against the second seat to facilitate fluid flow to the control port when the coil is energized. Adjustment of the stem's first end relative to the armature and of the poppet on the stem's second end establish a predetermined stroke for the plunger assembly and a predetermined fluid flow rate to the control port.
    Type: Application
    Filed: May 19, 2011
    Publication date: November 22, 2012
    Applicant: Eaton Corporation
    Inventors: Robert D. Keller, Robert J. Boychuk, Keith A. Krett