Patents by Inventor David A. Darrow

David A. Darrow 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).

  • Rigid rotor head with tension torsion (TT) strap retention
    Patent number: 10696386
    Abstract: A box frame hub arm structure is provided and includes a body having an outboard surface, which is disposable to abut with an inboard surface of an outboard arm of an aircraft rotor head, and lead/lag sides. The body is formed to define a first cavity, an aperture communicative with the first cavity through the outboard surface and second and third cavities. The second and third cavities extend outwardly in opposite lead/lag directions from the first cavity to the lead/lag sides.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: June 30, 2020
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Frederick J. Miner, David A. Darrow, Stephen V. Poulin, Richard Thomas Hood, Frank P. D'Anna
  • RIGID ROTOR HEAD WITH TENSION TORSION (TT) STRAP RETENTION
    Publication number: 20180281937
    Abstract: A box frame hub arm structure is provided and includes a body having an outboard surface, which is disposable to abut with an inboard surface of an outboard arm of an aircraft rotor head, and lead/lag sides. The body is formed to define a first cavity, an aperture communicative with the first cavity through the outboard surface and second and third cavities. The second and third cavities extend outwardly in opposite lead/lag directions from the first cavity to the lead/lag sides.
    Type: Application
    Filed: August 12, 2016
    Publication date: October 4, 2018
    Inventors: Frederick J. Miner, David A. Darrow, Stephen V. Poulin, Richard Thomas Hood, Frank P. D'Anna
  • Multi-plate clutch
    Patent number: 9951825
    Abstract: A multi-plate clutch apparatus is provided and includes a multi-plate clutch disposed to occupy clutch and non-clutch positions at which rotation of an input shaft is and is not transmitted to an output shaft, respectively, a drive element disposed about the multi-plate clutch and configured to generate rotational energy and a linear actuator disposed to convert the rotational energy of the drive element to linear movement by which the multi-plate clutch is controllable to occupy one of the clutch and non-clutch positions.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: April 24, 2018
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: David A. Darrow, Thomas L. Tully, Jr.
  • MULTI-PLATE CLUTCH
    Publication number: 20160208864
    Abstract: A multi-plate clutch apparatus is provided and includes a multi-plate clutch disposed to occupy clutch and non-clutch positions at which rotation of an input shaft is and is not transmitted to an output shaft, respectively, a drive element disposed about the multi-plate clutch and configured to generate rotational energy and a linear actuator disposed to convert the rotational energy of the drive element to linear movement by which the multi-plate clutch is controllable to occupy one of the clutch and non-clutch positions.
    Type: Application
    Filed: June 24, 2014
    Publication date: July 21, 2016
    Applicant: Sikorsky Aircraft Corporation
    Inventors: David A. DARROW, Thomas L. TULLY, JR.
  • Adjustable scissor control link
    Patent number: 9315265
    Abstract: A control link disposed to transfer rotor shaft rotation from an elongate element rotatable with a shaft to a rotatable element is provided and includes a structure terminating at a first end thereof as a mating element, which is securable to the elongate element such that the elongate element is rotatable about an axis defined through the mating element and such that a moment reaction in opposition to structure rotation about the elongate element is generated and a rod coupled to the rotatable element being and configured to be coupled to a second end of the structure at variable distances relative to the rotatable element.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: April 19, 2016
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Lance Halcom, Bryan Kenneth Baskin, Frank P. D'Anna, David A. Darrow, David H. Hunter
  • ADJUSTABLE SCISSOR CONTROL LINK
    Publication number: 20150298803
    Abstract: A control link disposed to transfer rotor shaft rotation from an elongate element rotatable with a shaft to a rotatable element is provided and includes a structure terminating at a first end thereof as a mating element, which is securable to the elongate element such that the elongate element is rotatable about an axis defined through the mating element and such that a moment reaction in opposition to structure rotation about the elongate element is generated and a rod coupled to the rotatable element being and configured to be coupled to a second end of the structure at variable distances relative to the rotatable element.
    Type: Application
    Filed: July 29, 2013
    Publication date: October 22, 2015
    Applicant: Sikorsky Aircraft Corporation
    Inventors: Lance Halcom, Bryan Kenneth Baskin, Frank P. D'Anna, David A. Darrow, David H. Hunter