Patents by Inventor Seong K. Rhee

Seong K. Rhee 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: 5597292
    Abstract: An ultrasonic pump having a first housing connected to a second housing to create a cavity therebetween. The first housing has a central stem that extends into the cavity with a passage for connecting the cavity with an outlet port. The second housing has an inlet port for communicating hydraulic fluid to the cavity. A plurality of piezoelectric disc are located on the stem by a first diaphragm to defined a actuation chamber within the cavity. The first diaphragm engages the first housing and stem to isolate the piezoelectric disc from hydraulic fluid supplied to the cavity and place a predetermined axial force on the piezoelectric disc. A second diaphragm located in the first and second housing has first and second surfaces which are substantially equal distances from the passage and the inlet port. Thereafter, air is bleed from the cavity to assure that only hydraulic fluid is present in the cavity.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: January 28, 1997
    Assignee: AlliedSignal, Inc.
    Inventors: Seong K. Rhee, Alistair G. Taig, Kenneth S. Towers
  • Patent number: 5372222
    Abstract: A rotor for use with a caliper in a brake system of a vehicle. The rotor has a hub with a plurality of openings therein for attachment to an axle which rotates with a wheel of the vehicle. The hub has spokes which radially extend from the hub to an integral annular head member. The head member has parallel first and second friction surfaces thereon for engagement with brake pads on actuation during a brake application. The rotor which is made from a composition consisting essentially of from 50-85 percent by volume of silicon carbide and 50-15 percent by volume of copper and from 0-15 percent by volume of graphite fiber, develops a thermal conductivity at room temperature of from 0.16-0.74 cal/ (50-310 W/
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: December 13, 1994
    Assignee: AlliedSignal Inc.
    Inventors: Seong K. Rhee, Thomas A. Libsch
  • Patent number: 5339931
    Abstract: Friction material pads for use in a brake system with an aluminum-metal matrix composite rotor wherein a brake application can create operational temperatures that approach 450C. The formulation of the composition for the friction pads is generically a basic non-asbestos organic formula modified to include a high abrasive content, solid lubricant package, and a porous copper powder. The porous copper powder which makes up from 2-18 percent by weight the friction pads has a nominal diameter of 0.20 mm. The porous copper powder proportionally responds to temperature and mechanical forces generated during a brake application by deforming and smearing to aid in the formation of a glaze between the engaging surfaces of the friction pads and aluminum-metal matrix composite rotor. This glaze prevents scoring of the aluminum-based rotor while at the same time maintaining a substantial stable coefficient of friction of approximately 0.4 during brake applications over a wide range of speeds and deceleration rates.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: August 23, 1994
    Assignee: Allied-Signal Inc.
    Inventors: Michael G. Jacko, Peter H. Tsang, Seong K. Rhee
  • Patent number: 5261511
    Abstract: A brake rotor for use with a caliper in a brake system is made from a composition having from 20-80 percent by volume of silicon carbide and from 80-20 percent by volume of an iron alloy consisting of: 0.4 to 4.0 percent by weight of total carbon; 1.8 to 18.0 percent by weight of Si; 1.0 to 10.0 percent by weight of X where X is selected from a group consisting of Cr, Mo, Mn, Ni, P and S; and the balance of iron alloy being Fe, the composition having a theoretical thermal conductivity at room temperature of 0.19 to 0.41 cal/cm*sec*deg C.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: November 16, 1993
    Assignee: Allied-Signal Inc.
    Inventors: Thomas A. Libsch, Seong K. Rhee
  • Patent number: 5108159
    Abstract: A noise sensor for supplying a central processing unit of an anti-lock brake system with a noise signal corresponding to vibrations produced during braking. The central processing unit responds to the noise signal by supplying a control valve assembly with an operational signal which modulates the fluid pressure supplied to a wheel cylinder to create a predetermined fluid pressure frequency therein to nullify vibrations and correspondingly attenuate noise produced thereby.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: April 28, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Peter H. Tsang, Seong K. Rhee, Theodore F. Schnitz, Yiren S. Wang
  • Patent number: 5014827
    Abstract: A disc brake assembly (10) having an actuation piston assembly 36 which responds to a hydraulic fluid to provide a force for moving brake pads (42, 44) into engagement with a rotor (12). The actuation piston assembly (36) has an elastomeric ring (66, 166, 266, 366) through which the force is transmitted to a brake pad (42) to attenuate any vibrations that may be created during a brake application and as a result a reduction in audible sound.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: May 14, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Yiren S. Wang, Seong K. Rhee, Robert E. Jokisch
  • Patent number: 4920159
    Abstract: The present invention is a composition comprising a friction resistant filler and a cyanato group containing phenolic resin which has repeating units of the formula: ##STR1## wherein p is 0 or an integer of one or more, q is an integer of one or more, and X is a radical selected from the group consisting of: --CH.sub.2 --, --CO--, --SO.sub.2 --, ##STR2## with --CH.sub.2 -- preferred. R is the same or different and is selected from the group consisting of hydrogen and methyl radicals and composition based on phenolic triazine resins derived therefrom.
    Type: Grant
    Filed: January 11, 1989
    Date of Patent: April 24, 1990
    Assignee: Allies-Signal Inc.
    Inventors: Sajal Das, Dusan C. Prevorsek, Seong K. Rhee, William J. Bulger
  • Patent number: 4617165
    Abstract: A composition of material for use as a friction material in a brake and its method of manufacture. Liquid double salts of dibasic and monobasic (ammonium-potassium hydrogen) phosphoric acid (DSP) is added to a dry mixture of reinforcing fiber, friction modifiers, fillers and phenolic resin to create a high viscosity slurry. Thereafter, a metallic (magnesium) oxide and para formaldehyde (para) are added to the slurry. Molds which have been previously heated are filled with the slurry and any excess removed. The metallic oxide reacts with the DSP and the para reacts with the phenolic resin to create a two binder matrix for holding the reinforcing fiber, friction material and fillers in a fixed relationship corresponding to the shape of a brake pad. The brake pads are removed from the molds and transported to a ventilated chamber where the internal curing proceeds at or near ambient temperature to complete the manufacture of the brake pad.
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: October 14, 1986
    Inventors: Peter H. S. Tsang, Joseph P. Coyle, Seong K. Rhee
  • Patent number: 3943323
    Abstract: A bonding head for connecting the electrically conductive leads of a tape cable or the like to other electrical conductors. The bonding head, which applies heat and pressure to the electrical conductors and leads to bond them together, is an elongated member comprised of a material having high mechanical strength but low thermal conductivity which contains a conduit comprised of a material having low mechanical strength but high thermal conductivity. A heating element inserted in the conduit supplies heat to the conduit and bonding head. This arrangement provides a bonding head having a high mechanical strength and hence structural failure and deformation of the bonding head is reduced.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: March 9, 1976
    Assignee: The Bendix Corporation
    Inventors: Gerald C. Smith, Dennis L. Ellingson, Colin A. Johnson, Seong K. Rhee