Patents by Inventor Zdravko Menjak

Zdravko Menjak 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).

  • Publication number: 20030203274
    Abstract: A fuel cell utilizing parallel flow of a hydrogen stream, an oxygen stream, and an electrolyte solution with respect to the electrodes, while maintaining mechanical support within the fuel cell. The fuel cell utilizes framed electrodes to maintain a high air flow rate and low pressure throughout the fuel cell. The fuel cell is also designed to maintain mechanical support within the fuel cell while the electrodes expand and contract in response to the absorption of oxygen and hydrogen. Gas is predistributed by the compression plates and frames to supply the electrodes with high concentrations of oxygen from air.
    Type: Application
    Filed: April 29, 2002
    Publication date: October 30, 2003
    Inventors: Stanford R. Ovshinsky, Ana Menjak, Tom Hopper, Zdravko Menjak, Kevin Fok, Boyko Aladjov, Srinivasan Venkatesan, Subhash K. Dhar
  • Publication number: 20030162074
    Abstract: A fuel cell utilizing parallel flow of a hydrogen stream, an oxygen stream, and an electrolyte solution with respect to the electrodes, while maintaining mechanical support within the fuel cell. The fuel cell contains multiple layers of electrodes which absorb and react hydrogen and oxygen. The fuel cell is designed to maintain mechanical support within the fuel cell while the electrodes expand and contract in response to the absorption of oxygen and hydrogen. The design of the fuel cell provides a substantially more compact design by not requiring space to allow for the expansion and contraction of the electrodes within the fuel cell.
    Type: Application
    Filed: February 28, 2002
    Publication date: August 28, 2003
    Inventors: Zdravko Menjak, Boyko Aladjov, Srinivasan Venkatesan, Subhash K. Dhar, Stanford R. Ovshinsky
  • Publication number: 20030141135
    Abstract: A drive-by wire steering system is provided. The system comprises a steering shaft and a center feel mechanism. The steering shaft is configured for a first angular displacement about a first axis. The steering shaft has a first geared portion and a first end connectable to a vehicle's steering wheel. The center feel mechanism comprises a cam face, an urging member and a second geared portion. The first geared portion and the second geared portion are operatively engaged such that the first angular displacement of the steering shaft imparts a second angular displacement about a second axis to the center feel mechanism. The cam face and the urging member are configured to generate a retuning torque to the center feel mechanism. The retuning torque has a direction opposite the second angular displacement.
    Type: Application
    Filed: January 30, 2002
    Publication date: July 31, 2003
    Inventors: Ratko Menjak, Zdravko Menjak
  • Publication number: 20030141137
    Abstract: A drive-by wire steering system comprising a steering shaft and a steering wheel return mechanism is provided. The steering shaft comprises a first geared portion and a first end, where the first end is connectable to a vehicle's steering wheel. The steering wheel return mechanism comprises a torsion spring and a second geared portion. The first geared portion and the second geared portion are operatively engaged such that a first angular displacement of the steering shaft about a first axis imparts a second angular displacement about a second axis to the steering wheel return mechanism. The torsion spring is configured to generate a returning torque on the steering wheel return mechanism upon the second angular displacement of the steering wheel return mechanism. The returning torque has a direction opposite the first angular displacement, and is proportional to the second angular displacement.
    Type: Application
    Filed: January 30, 2002
    Publication date: July 31, 2003
    Inventors: Ratko Menjak, Zdravko Menjak
  • Publication number: 20030141136
    Abstract: A drive-by wire steering system is provided. The steering system comprises a steering shaft and a stop mechanism. The steering shaft is configured for a first angular displacement about a first axis. The steering shaft comprises a first geared portion and a first end. The first end is connectable to a vehicle's steering wheel. The stop mechanism comprises a stop portion and a second geared portion. The stop portion defines a first position and a second position. The first geared portion and the second geared portion are operatively engaged such that angular displacement of the steering shaft imparts a second angular displacement about a second axis to the stop mechanism. The first angular displacement is limited when the second angular displacement is such that the steering shaft abuts the stop portion at either the first position or the second position.
    Type: Application
    Filed: January 30, 2002
    Publication date: July 31, 2003
    Inventors: Ratko Menjak, Zdravko Menjak
  • Patent number: 6598695
    Abstract: A drive-by wire steering system is provided. The steering system comprises a steering shaft and a stop mechanism. The steering shaft is configured for a first angular displacement about a first axis. The steering shaft comprises a first geared portion and a first end. The first end is connectable to a vehicle's steering wheel. The stop mechanism comprises a stop portion and a second geared portion. The stop portion defines a first position and a second position. The first geared portion and the second geared portion are operatively engaged such that angular displacement of the steering shaft imparts a second angular displacement about a second axis to the stop mechanism. The first angular displacement is limited when the second angular displacement is such that the steering shaft abuts the stop portion at either the first position or the second position.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: July 29, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Ratko Menjak, Zdravko Menjak
  • Publication number: 20030059664
    Abstract: The present invention discloses a fuel cell, which incorporates a bipolar plate. The regenerative bipolar fuel cell of the present invention contains at least one hydrogen electrode in contact with a hydrogen stream and at least one oxygen electrode in contact with an oxygen stream. At least one electrolyte chamber is in contact with the hydrogen electrode and at least one electrolyte chamber is in contact with the oxygen electrode. The electrolyte chambers provide mechanical support within the fuel cell and provide an uninterrupted pathway for an electrolyte solution to contact the hydrogen electrode and the oxygen electrode, respectively. At least one bipolar plate is positioned between the hydrogen electrode and the oxygen electrode. The bipolar plate has a hydrogen side in contact with the hydrogen electrode and an oxygen side in contact with the oxygen electrode.
    Type: Application
    Filed: October 22, 2002
    Publication date: March 27, 2003
    Inventors: Zdravko Menjak, Srinivasan Venkatesan, Boyko Aladjov, Latchezara M. Gradinarova, Hong Wang, Stanford R. Ovshinsky, Subhash K. Dhar
  • Publication number: 20020148673
    Abstract: A steering gear system for an electric power steering system includes a motor, a gearing mechanism driven by the motor, a drive gear in mechanical communication with the gearing mechanism, a ball nut driven by the drive gear, and a rack laterally positioned through the ball nut and configured to translate the ball nut upon rotation thereof. The gearing mechanism includes a pinion and a sub-pinion in mechanical communication with each other held together but urged apart by a resilient member disposed therebetween. The pinion is urged away from a rotor shaft of the motor by at least one spring to compensate for angular motion of the pinion on the rotor shaft. Helical gear threads disposed on the pinion and sub-pinion are configured to engage corresponding threads on the drive gear. The resilient member forces the flanks of the threads on the pinion and the sub-pinion to remain in contact with corresponding threads on the drive gear regardless of the direction of rotation of the pinion/sub-pinion assembly.
    Type: Application
    Filed: April 17, 2001
    Publication date: October 17, 2002
    Inventors: Zdravko Menjak, Ratko Menjak
  • Patent number: 6454044
    Abstract: A steering gear system for an electric power steering system includes a motor, a gearing mechanism driven by the motor, a drive gear in mechanical communication with the gearing mechanism, a ball nut driven by the drive gear, and a rack laterally positioned through the ball nut and configured to translate the ball nut upon rotation thereof. The gearing mechanism includes a pinion and a sub-pinion in mechanical communication with each other held together but urged apart by a resilient member disposed therebetween. The pinion is urged away from a rotor shaft of the motor by at least one spring to compensate for angular motion of the pinion on the rotor shaft. Helical gear threads disposed on the pinion and sub-pinion are configured to engage corresponding threads on the drive gear. The resilient member forces the flanks of the threads on the pinion and the sub-pinion to remain in contact with corresponding threads on the drive gear regardless of the direction of rotation of the pinion/sub-pinion assembly.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: September 24, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Zdravko Menjak, Ratko Menjak
  • Patent number: 5979938
    Abstract: An adjustable motor vehicle steering column including a stationary element, an adjustable element supported on the stationary element for relative linear translation, a steering wheel on the adjustable element, an infinitely adjustable primary clamp, and a secondary clamp for preventing relative linear translation of the adjustable element in a collapse direction in the event that the primary clamp is overpowered. The primary clamp includes a pair of depending levers on the stationary element, a pair of bosses on the depending levers, a control shaft spanning the depending levers and rotatable by a control lever, a cam on one of the depending levers, and a follower on the control shaft. The cam and follower flex the depending levers to thrust the bosses against the adjustable element to capture by friction the position of the latter relative to the stationary element.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: November 9, 1999
    Assignee: General Motors Corporation
    Inventors: Zdravko Menjak, Ratko Manjak, Jerome Anthony Bartkowiak