Patents by Inventor David Drennen

David Drennen 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: 9297430
    Abstract: A park brake system for an electric motor actuator is provided. The system may comprise a wrap spring that may rotatably engage the shaft. In this regard, the system may be configured to exert a radial force on a shaft of the electric motor actuator to lock the actuator. Moreover, in various embodiments, the system may be bi-stable.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: March 29, 2016
    Assignee: GOODRICH CORPORATION
    Inventors: David Drennen, Harald Klode, Kevin Rehfus
  • Publication number: 20160039520
    Abstract: An electro-mechanical actuator including an aircraft parking brake may include a motor shaft, a park brake disk, and a voice coil assembly. The voice coil assembly may include a bobbin configured to translate between an engaged position and a disengaged position. An engagement feature may be coupled to the bobbin. The engagement feature may contact the park brake disk in the engaged position. The engagement feature may be magnetically coupled to a voice coil magnet and washer in the disengaged position.
    Type: Application
    Filed: August 7, 2014
    Publication date: February 11, 2016
    Inventors: DAVID DRENNEN, KEVIN REHFUS, ROBERT FRENCH, ALBERT KEITH PANT, JOSEPH E. BEASON, HARALD KLODE
  • Patent number: 9221440
    Abstract: The EMA may comprise an EMA housing, a strain gauge coupled to the EMA housing, the strain gauge comprising a Wheatstone bridge, the Wheatstone bridge comprising a first group of resistors coupled in parallel with a second group of resistors, a controller coupled to the strain gauge, a variable resistance resistor coupled to the Wheatstone bridge, the variable resistance resistor configured to derive a temperature of the EMA housing based upon a temperature of the variable resistance resistor and configured to provide feedback to the controller, the controller adjusting a force applied by the EMA based upon the temperature of the EMA housing.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: December 29, 2015
    Assignee: GOODRICH CORPORATION
    Inventors: David Drennen, Steven Keller
  • Publication number: 20150354644
    Abstract: A park brake system for an electric motor actuator is provided. The system may comprise a micro-motor, and one or more gears. The system may be configured to exert a radial force on a shaft of the electric motor actuator to lock the actuator. Moreover, in various embodiments, the system may be bi-stable.
    Type: Application
    Filed: August 21, 2015
    Publication date: December 10, 2015
    Applicant: GOODRICH CORPORATION
    Inventors: David Drennen, Robert French, Harald Klode, Kevin Rehfus
  • Patent number: 9140321
    Abstract: A park brake system for an electric motor actuator is provided. The system may comprise a micro-motor, and one or more gears. The system may be configured to exert a radial force on a shaft of the electric motor actuator to lock the actuator. Moreover, in various embodiments, the system may be bi-stable.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: September 22, 2015
    Assignee: GOODRICH CORPORATION
    Inventors: David Drennen, Robert French, Harald Klode, Kevin Rehfus
  • Publication number: 20150127233
    Abstract: The EMA may comprise an EMA housing, a strain gauge coupled to the EMA housing, the strain gauge comprising a Wheatstone bridge, the Wheatstone bridge comprising a first group of resistors coupled in parallel with a second group of resistors, a controller coupled to the strain gauge, a variable resistance resistor coupled to the Wheatstone bridge, the variable resistance resistor configured to derive a temperature of the EMA housing based upon a temperature of the variable resistance resistor and configured to provide feedback to the controller, the controller adjusting a force applied by the EMA based upon the temperature of the EMA housing.
    Type: Application
    Filed: November 7, 2013
    Publication date: May 7, 2015
    Applicant: GOODRICH CORPORATION
    Inventors: David Drennen, Steven Keller
  • Publication number: 20150115778
    Abstract: An integrated actuator drive unit (ADU) assembly for an electric motor actuator is disclosed. The integrated ADU assembly may comprise at least one of an integrally formed ring gear, an integrally formed thrust bearing and integrally formed load cell. The integrated ADU assembly may comprise a portion of an electromechanical actuator. The electromechanical actuator may be utilized for aircraft braking systems.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Applicant: GOODRICH CORPORATION
    Inventors: DAVID DRENNEN, HARALD KLODE, KEVIN REHFUS
  • Publication number: 20150115779
    Abstract: A instrumented housing for an electric motor actuator is provided. The instrumented housing may have a ribbon gage coupled to a housing of an electrical motor actuator. The ribbon gage may have one or more strain gages. The strain gages may measure the tension on the housing when the electric motor actuator exerts a load. A cover may extend over at least a portion of the housing and ribbon gage.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Applicant: GOODRICH CORPORATION
    Inventors: Kevin Rehfus, Joseph E. Beason, David Drennen, Harald Klode, Thomas Freshour, Jantzen Hinton
  • Patent number: 9004233
    Abstract: A ring-shaped thrust bearing extending in an axial direction having an inner surface includes a first axial groove in the inner surface having a first flat wall and a second flat wall; and a first principal strain sensor positioned on the first flat wall of the first axial groove to measure compression in the axial direction.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: April 14, 2015
    Assignee: Goodrich Corporation
    Inventors: David Drennen, Kevin Rehfus, Douglas Lee Simpson, Thomas Freshour
  • Patent number: 8931599
    Abstract: An electric braking apparatus is provided and includes an electromechanical actuator (EMA) configured to apply an axial load on a brake stack and a damping end-stop. The damping end-stop is configured to transmit torque into the EMA and includes an end cap, a screw disposed such that a longitudinal axis about which the screw is rotatable extends through the end cap, a nut threadably engaged with the screw and movable with the end cap relative to the screw with screw rotation and a spring element anchored on the end cap to resist the screw rotation beyond a predefined position.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: January 13, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: David Drennen, Harald Klode, Robert French, Kevin Rehfus
  • Publication number: 20150007679
    Abstract: An electromechanical actuator (“EMA”) may comprise a ball screw having at least one tab extending from an inner surface thereof and/or an actuator drive unit (“ADU”) housing that interfaces with the at least one tab. The bail screw may include three tabs extending from the inner surface thereof. An outer surface of the ball screw may be threaded to mate with a threaded portion of an inner surface of the ADU housing, and/or the ADU housing may interface with the at least one tab, and the ball screw may be rotated to translate a ball nut situated concentrically over ball screw axially. The ADU housing may include a gear train assembly having a carrier plate, wherein the carrier plate includes at least one receptacle.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: David Drennen, Harald Klode, Kevin Rehfus
  • Publication number: 20150008091
    Abstract: A park brake system for an electric motor actuator is provided. The system may comprise a wrap spring that may rotatably engage the shaft. In this regard, the system may be configured to exert a radial force on a shaft of the electric motor actuator to lock the actuator. Moreover, in various embodiments, the system may be bi-stable.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 8, 2015
    Inventors: David Drennen, Harald Klode, Kevin Rehfus
  • Publication number: 20150007675
    Abstract: An electromechanical actuator (“EMA”) comprising an actuator drive unit (“ADU”) housing and a ball screw is disclosed. The ball screw and ADU housing may interface to form a multi-row thrust bearing (MRTB). Further, the ball screw may be situated at least partially about the ADU housing, an outer surface of the ADU housing may include a first ADU raceway, and an inner surface of the ball screw may include a second inner ball screw raceway. Either or both raceways may comprise hemispherical structures.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: David Drennen, Harald Klode, Kevin Rehfus
  • Publication number: 20150001034
    Abstract: A park brake system for an electric motor actuator is provided. The system may comprise a micro-motor, and one or more gears. The system may be configured to exert a radial force on a shaft of the electric motor actuator to lock the actuator. Moreover, in various embodiments, the system may be bi-stable.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: David Drennen, Robert French, Harald Klode, Kevin Rehfus
  • Publication number: 20140375179
    Abstract: An electromechanical actuator housing assembly comprising a reinforcement ring is disclosed herein. The design of the electromechanical actuator housing assembly may be directed to improving load measurement accuracy. The design of the electromechanical actuator housing assembly may be directed to reducing housing deflections. A method of manufacture of an EMA housing assembly is also disclosed herein. This method may include an electromechanical actuator housing assembly having a reinforcement ring.
    Type: Application
    Filed: June 20, 2013
    Publication date: December 25, 2014
    Inventors: JANTZEN HINTON, KEVIN REHFUS, DAVID DRENNEN
  • Publication number: 20140290409
    Abstract: A ballscrew assembly may include a ballnut configured to combat the negative effects of thermal expansion of dissimilar materials used within the ballscrew assembly. Moreover, the ballscrew assembly described herein may have a decreased coefficient of friction as compared with a steel on steel housing and ballnut configuration. A ballscrew assembly may comprise a ballnut made from a first material, a ballnut housing made from a second material, and a sleeve made from a third material. The sleeve may be positioned between the exterior of the ballnut and an interior of the ballnut housing to reduce friction between the exterior surface of the ballnut and an interior surface of the ballnut housing.
    Type: Application
    Filed: April 1, 2013
    Publication date: October 2, 2014
    Applicant: Goodrich Corporation
    Inventors: Kevin Rehfus, David Drennen, Harald Klode
  • Publication number: 20140158474
    Abstract: A ring-shaped thrust bearing extending in an axial direction having an inner surface includes a first axial groove in the inner surface having a first flat wall and a second flat wall; and a first principal strain sensor positioned on the first flat wall of the first axial groove to measure compression in the axial direction.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Applicant: GOODRICH CORPORATION
    Inventors: David Drennen, Kevin Rehfus, Douglas Lee Simpson, Thomas Freshour
  • Publication number: 20140116820
    Abstract: An electric braking apparatus is provided and includes an electromechanical actuator (EMA) configured to apply an axial load on a brake stack and a damping end-stop. The damping end-stop is configured to transmit torque into the EMA and includes an end cap, a screw disposed such that a longitudinal axis about which the screw is rotatable extends through the end cap, a nut threadably engaged with the screw and movable with the end cap relative to the screw with screw rotation and a spring element anchored on the end cap to resist the screw rotation beyond a predefined position.
    Type: Application
    Filed: November 1, 2012
    Publication date: May 1, 2014
    Inventors: David Drennen, Harald Klode, Robert French, Kevin Rehfus
  • Publication number: 20070029142
    Abstract: A ball screw and nut assembly includes a ball screw component having a threaded outer surface and a ball nut component having a bore in which the ball screw component is received. The ball nut component includes a threaded inner surface that cooperates with the threaded outer surface of the ball screw component to achieve axial movement of the ball nut component between a fully retracted position and a fully extended position as the ball screw rotates relative to the ball nut. A positive stop prevents rotation of the ball screw component relative to the ball nut component at an axial position between the fully retracted position and the fully extended position as the ball nut component is retracted.
    Type: Application
    Filed: August 3, 2005
    Publication date: February 8, 2007
    Inventors: David Drennen, Ronald Smith, Ernest Siler, Paul Rymoff, Harald Klode, Bryan Riddiford
  • Publication number: 20060151260
    Abstract: A brake apparatus is provided and includes a housing having a bore extending therethrough and an axial opening therein, a piston closely and slidably received within the bore, a driving member having a flange thereon, the driving member extending through the axial opening to operatively connected the piston to an electric motor, wherein rotation of the driving member is translated into axial movement of the piston, and a bearing coaxially received over the driving member and positioned between the flange and the housing, wherein the bearing facilitates rotation of the driving member relative to the housing and resists axial movement of the driving member relative to the housing.
    Type: Application
    Filed: December 21, 2005
    Publication date: July 13, 2006
    Inventors: David Drennen, Ronald Smith, Ernest Siler, Paul Rymoff, Harald Klode