Patents Represented by Attorney Norman Friedland

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  • Picture hanger
    Patent number: 5133526
    Abstract: A picture frame or art form hanging means including the backing member of the frame being fabricated from a flat stiff material with a beaded edge formed about the aperture formed in the center of the backing members. Concentric beaded arcuate slots form another embodiment of the invention.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: July 28, 1992
    Inventor: Robert G. Olmsted
  • Fastener mounting for multi-stage compressor
    Patent number: 5131811
    Abstract: The compressor section which comprises a first group of stages are rotably supported in an axially split outer case and the second group of stages are rotatably supported in a full hoop outer case. The segmented stator within the full hoop outer case is tied to the full hoop outer case by spool/bolt elements such that each segment includes a spool/bolt element at each end and a spool/bolt element in the center thereof.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: July 21, 1992
    Assignee: United Technologies Corporation
    Inventor: Thomas G. Johnson
  • Cooled combustor dome heatshield
    Patent number: 5129231
    Abstract: The heatshield for the fuel nozzles mounted at the dome of an annular combustor for a gas turbine engine is cooled by discretely locating cool air film cooling holes in the heatshield oriented to inject the cooling air with the recirculation zone to be compatible with the direction of the swirling air in the recirculated zone.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: July 14, 1992
    Assignee: United Technologies Corporation
    Inventors: James T. Becker, Thomas A. Auxier
  • Compressor case attachment means
    Patent number: 5127797
    Abstract: A segmented stator vane of a compressor in a gas turbine engine is supported to a full hoop outer case by a "tongue and groove" removable support element that provides radial and tangential restraint while permitting each of the segments to grow thermally in the axial and circumferential directions.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: July 7, 1992
    Assignee: United Technologies Corporation
    Inventor: Kenneth E. Carman
  • Compressor case with controlled thermal environment
    Patent number: 5127794
    Abstract: The thermal environment to which the engine's compressor case is subjected is controlled and the coefficient of expansion selected for the stator and rotor components are suitably matched to improve engine performance by reducing radial clearances during part power engine operations. A thermal barrier around the engine case by virtue of a heat shield attached to the customary case flanges and the coaxially mounted spaced stator vanes forming an inner case defining cavities sandwiching the engine case and holds the metal temperature at a value higher than would otherwise be provided. The thermal barrier serves to isolate the outer case from the engine's fan discharge air and the engine's core gas path.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: July 7, 1992
    Assignee: United Technologies Corporation
    Inventors: Joseph C. Burge, Richard J. Tiernan, Jr.
  • Compressor case construction with backbone
    Patent number: 5118253
    Abstract: The after end of each of the segments of a segmented stator at the end of the compressor section of a gas turbine engine is supported to the full hoop outer case by an annular disk-like element that is generally straight in cross-section where each segment is joined to the disk-like element by a single bolt extending axially through a radial flange integrally formed on each of the segments and the bolt is located intermediate the ends of the flange and the flange fits into an annular groove formed in the end of the disk-like element permitting circumferential thermal growth with radial restraint.
    Type: Grant
    Filed: September 12, 1990
    Date of Patent: June 2, 1992
    Assignee: United Technologies Corporation
    Inventor: James T. Balkcum, III
  • Dashpot damper
    Patent number: 5088840
    Abstract: A damper system for supporting a bearing for a rotating shaft of a gas turbine engine includes a plurality of circumferentially spaced dashpot dampers including either a piston or bellows juxtaposed between the bearing housing and the bearing support spring.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: February 18, 1992
    Assignee: United Technologies Corporation
    Inventor: Lee Radtke
  • Combined turbine stator cooling and turbine tip clearance control
    Patent number: 5048288
    Abstract: The outer air seal of a gas turbine engine is continuously cooled by compressor discharge air (primary) and a by-pass line (secondary) which can be throttled or shut off, augments cooling during high power conditions and is throttled or shut off at reduced power conditions, allowing the casing scrubbed by fan discharged air to shrink and reduce the clearance of the tips of the turbine blades. The air from the continuous flow (primary) line is routed to the outer air seals in a manner to avoid scrubbing the engine case.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: September 17, 1991
    Assignee: United Technologies Corporation
    Inventors: Alan D. Bessette, Daniel O. Davies, John L. Shade
  • Spring supported damping system
    Patent number: 5044781
    Abstract: A damper system for supporting a bearing for a rotating shaft of a gas turbine engine includes a plurality of cylinders circumferentially spaced about the outer race of the bearing with a reciprocating piston in each of the cylinders having one face bearing against the outer race and the other face disposed in a fluid-filled chamber with an inlet and restricted outlet that forces the liquid in and out of the chamber in response to the vibratory motion as the outer race orbits about the cylinders exciting the piston to effectuate a pumping action.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: September 3, 1991
    Assignee: United Technologies Corporation
    Inventor: Malcolm J. Werner
  • Acceleration control with duct pressure loss compensation
    Patent number: 5022224
    Abstract: Control logic means to compensate for fan bypass duct pressure losses in a system that controls the acceleration mode for a twin spool gas turbine engine so as to allow the engine to accelerate rapidly with adequate stall margin by simulating a compressor stall limit. The stall limit is attained by generating a limiting ratio of burner pressure and another engine pressure as a function of corrected compressor rotor speed assuming that the stall margin is independent of compressor bleed, power extraction and degradation of engine efficiency. Compensation is by generating an engine pressure ratio signal as a function of corrected low pressure compressor rotor speed and using the difference between the signal and actual engine pressure ratio for modifying the simulated compressor stall limit.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: June 11, 1991
    Assignee: United Technologies Corporation
    Inventor: Jesse W. Smith
  • Crack growth rate measuring instrument
    Patent number: 5005423
    Abstract: A fatigue crack growth rate measuring instrument serves to screen specimens of materials by cycling of load at a constant displacement and recording the load .upsilon. cycle characteristics and calculating the da/dN v. .DELTA. K for ascertaining if the specimen falls within or without the range of acceptability.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: April 9, 1991
    Assignee: United Technologies Corporation
    Inventor: Mark L. Poormon
  • Replaceable fairing for a turbine exhaust case
    Patent number: 4993918
    Abstract: A free floating fairing comprising an outer ring fairing, an inner ring fairing and a three piece replaceable strut fairing define an aerodynamic contour and heat shield for the turbine exhaust case of a gas turbine engine. The material fo the fairing can be selected to optimize heat transfer characteristics to enhance the structural integrity of the supporting structure while assuring the lubrication in the lubricating passages in the struts does not coke and the preload on the support rods is not lost during engine operation. The inner ring fairing serves to hold in place the nose piece of the three piece strut fairing for ease of replacement.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: February 19, 1991
    Assignee: United Technologies Corporation
    Inventors: Richard S. Myers, Peter T. Vercellone
  • Combustor fuel nozzle arrangement
    Patent number: 4991398
    Abstract: The fuel nozzles in the combustor of a gas turbine engine are concentrically disposed in two tiers about the circumference of the dome and are arranged in a triangular pattern with the air swirl orientation providing an increased intensity of combustion so as to enable a reduction in combustor size and weight while increasing temperature rise and the overall thrust-to-weight ratio of the engine.
    Type: Grant
    Filed: January 12, 1989
    Date of Patent: February 12, 1991
    Assignee: United Technologies Corporation
    Inventors: Jim A. Clark, James H. Shadowen, Thomas L. DuBell
  • Acceleration control for a gas turbine engine
    Patent number: 4984425
    Abstract: A control to control the acceleration mode for a gas turbine engine so as to allow the engine to accelerate rapidly with adequate stall margin by simulating a compressor stall limit. The stall limit is attained by generating a limiting ratio of burner pressure and another engine pressure as a function of corrected compressor rotor speed assuming that the stall margin is independent of compressor bleed, power extraction and degradation of engine efficiency.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: January 15, 1991
    Assignee: United Technologies Corporation
    Inventor: Jesse W. Smith
  • Support for oil film dampers
    Patent number: 4981415
    Abstract: A relatively less complex segmented spring mounted under the bearing and damper or the same configuration segmented spring mounted on either side of the bearing and damper serves to center the shaft of a rotor of a gas turbine engine and is characterized as being simple, occupying minimum space, but being capable of maintaining an adequate fatigue stress margin.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: January 1, 1991
    Assignee: United Technologies Corporation
    Inventors: Ronald A. Marmol, Walter E. Wojcicki
  • Fluid damper and spring
    Patent number: 4971458
    Abstract: A fluid damper and mechanical spring for a radial bearing supporting a shaft of an aircraft gas turbine engine fabricated from a full ring having fluid cavities circumferentially space on the outer diameter of the ring operatively connected to the complementary surface of the support housing and having circumferentially spaced arcuate slots overlying the fluid cavities having a free end for providing the mechanical spring function.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: November 20, 1990
    Assignee: United Technologies Corporation
    Inventor: Russell L. Carlson
  • Fluid damper for thrust bearing
    Patent number: 4952076
    Abstract: A film squeeze damper for a thrust bearing includes a plurality of curved beam segments each having a fluid chamber adjacent the support housing and mounted end to end to surround the thrust bearing. Side mounted nibs transmit the thrust load from a radial dependent member of the outer race to the support housing through each segment. This permits unrestrained radial damping of vibratory energy occasioned by the unbalance in the supported shaft. A mechanical stop is provided by the design to limit radial deflection of the segment during a high rotor unbalance.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: August 28, 1990
    Assignee: United Technologies Corporation
    Inventors: Walter H. Wiley, III, Charles D. Aaron, Jr., Russell L. Carlson, Charles L. Davis, III, Ronald A. Marmol
  • Modular gas turbine engine
    Patent number: 4934140
    Abstract: A gas turbine fan engine with improved maintainability features is disclosed. Forward and rearward sections of the core of the engine are joined one to the other, and each are independently separable from the pylon on which the engine is mounted without the necessity of removing the other from the airplane.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: June 19, 1990
    Assignee: United Technologies Corporation
    Inventors: William T. Dennison, William G. Monsarrat, Robert F. Brodell
  • Control of high compressor vanes and fuel for a gas turbine engine
    Patent number: 4928482
    Abstract: The time responsiveness and engine stability for an acceleration and deceleration engine transient is enhanced by a control mechanism that synchronously adjusts fuel flow and high pressure compressor vane position as a function of corrected low pressure compressor speed in a twin spool axial flow turbine power plant. The acceleration and deceleration mode is targeted by power lever position and the target is attained by adjusting the vane position at a constant high pressure compressor speed and returned to a fuel efficient and engine stable steady state operating line by concomittantly adjusting fuel flow and vane position.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: May 29, 1990
    Assignee: United Technologies Corporation
    Inventors: Robert R. Pollak, Juan A. Marcos
  • Fitting with lock wire feature
    Patent number: 4927187
    Abstract: A serrated collar having an inner flange portion adapted to be trapped between the nut and threaded adapter of a Rosan fitting and an outer flange portion having a hole for accommodating a lock or safety wire that is splined to the outer spline of the lock ring for obviating the necessity of locating the lock wire hole directly into the casing.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: May 22, 1990
    Assignee: United Technologies Corporation
    Inventors: David L. Sanford, Gary W. Douglass