Patents by Inventor David H. Hibner

David H. Hibner 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).

  • Moment imparting bearings for controlling shaft deflection
    Patent number: 5455472
    Abstract: A magnetic bearing assembly is disclosed which provides for correction of shaft deflection, or "bowing", during rotation of the shaft. The assembly comprises two stator rings in spaced relation to each other, and each stator ring comprises a plurality of stator sections which are independently activated. When the shaft "bows", sensors detect the deflection and independently activate the various stator sections producing a force couple which acts on the rotor to produce a bending moment in the shaft which tends to counteract the "bowing".
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: October 3, 1995
    Assignee: United Technologies Corporation
    Inventors: Carl F. Weiss, David H. Hibner
  • Apparatus for supporting a rotating shaft in a rotary machine
    Patent number: 5110257
    Abstract: A rotary machine 10 includes a rotor shaft 40 and a support system 63 for the shaft. The support system includes a spring 68 and viscous damper 70. Apparatus for removing oil from the damper at preselected rotor speeds is provided and in one embodiment permits operating the engine over a rotor speed range which avoids critical speeds.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: May 5, 1992
    Assignee: United Technologies Corporation
    Inventors: David H. Hibner, Dennis F. Buono, Kurt M. Dembeck, Roy D. Franceschet
  • Apparatus for supporting a rotating shaft in a rotary machine
    Patent number: 4983051
    Abstract: A rotary machine 10 includes a rotor shaft 40 and a support system 63 for the shaft. The support system includes a spring 68 and viscous damper 70.Means for removing oil from the damper at preselected rotor speeds is provided and in one embodiment permits operating the engine over a rotor speed range which avoids critical speeds.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: January 8, 1991
    Assignee: United Technologies Corporation
    Inventors: David H. Hibner, Dennis F. Buono, Kurt M. Dembeck, Roy D. Franceschet
  • Apparatus and method for supporting a rotating shaft in a rotary machine
    Patent number: 4947639
    Abstract: A rotary machine 10 includes a rotor shaft 40 and a support system 63 for the shaft. The support system includes a spring 68 and viscous damper 70.Means for removing oil from the damper at preselected rotor speeds is provided and in one embodiment permits operating the engine over a rotor speed range which avoids critical speeds.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: August 14, 1990
    Assignee: United Technologies Corporation
    Inventors: David H. Hibner, Dennis F. Buono, Kurt M. Dembeck, Roy D. Franceschet
  • Variable stiffness oil film damper
    Patent number: 4867655
    Abstract: The critical speed of a bearing supported rotating shaft is changed or controlled by dimensioning the oil squeeze film damper so that the volumen of oil is selected to produce a spring rate that when added to the mechanical spring rate will attain the overall spring rate of the system. The spring rate of the oil becomes effective when the volume is at a predetermined value which is at a level higher than heretofore known oil squeeze film dampers.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: September 19, 1989
    Assignee: United Technologies Corporation
    Inventors: John R. Barbic, Kurt L. Nichol, David H. Hibner, David R. Szafir
  • Nutation damper
    Patent number: 4657410
    Abstract: A damper for absorbing nutating motion of a rotating shaft (10) at a bearing (12) includes a radially-extending, non-rotating flange (30) flanked axially by fluid-filled damping volumes (34, 36) formed between the flange (30) and a stable support frame (18).
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: April 14, 1987
    Assignee: United Technologies Corporation
    Inventor: David H. Hibner
  • Viscous/friction damper
    Patent number: 4353604
    Abstract: A friction damper is mounted in series with a viscous damper to accommodate the normal magnitude vibration and the higher magnitude vibration occasioned from a larger imbalance of a jet engine rotor manifested by a bowed rotor and including a loading spring to allow the recentering of said friction damper when the higher magnitude vibrations subside.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: October 12, 1982
    Assignee: United Technologies Corporation
    Inventors: Michael D. Dulberger, David H. Hibner, Donald C. Moringiello
  • Viscous damper
    Patent number: 4337983
    Abstract: The characteristics of a viscous damper for high speed bearings of a gas turbine engine are changed by providing recirculation grooves at the outer edge of the inner diameter of the damper annular wall. Reduced shaft excursions are evidenced without affecting the size, oil flow and stiffness characteristic of the damper.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: July 6, 1982
    Assignee: United Technologies Corporation
    Inventor: David H. Hibner
  • Viscous/friction damper
    Patent number: 4336968
    Abstract: A friction damper is mounted in series with a viscous damper to accommodate the normal magnitude vibration and the higher magnitude vibration occasioned from a larger imbalance of a jet engine rotor manifested by a lost blade or the like.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: June 29, 1982
    Assignee: United Technologies Corporation
    Inventor: David H. Hibner
  • Damped intershaft bearing and stabilizer
    Patent number: 4046430
    Abstract: A viscous damper for a bearing mounted between coaxially mounted shafts rotating at relative speeds is stabilized by mounting a spring in parallel with the damper so as to raise the natural frequency of one of the shafts.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: September 6, 1977
    Assignee: United Technologies Corporation
    Inventors: Dennis F. Buono, Nils G. Carlson, David H. Hibner, Donald C. Moringiello
  • Damped intershaft bearing and stabilizer
    Patent number: RE30210
    Abstract: A viscous damper for a bearing mounted between coaxially mounted shafts rotating at relative speeds is stabilized by mounting a spring in parallel with the damper so as to raise the natural frequency of one of the shafts.
    Type: Grant
    Filed: November 22, 1978
    Date of Patent: February 12, 1980
    Assignee: United Technologies Corporation
    Inventors: Dennis F. Buono, Nils G. Carlson, David H. Hibner, Donald C. Moringiello