Patents by Inventor Dalibor Zaviska

Dalibor Zaviska 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: 6405534
    Abstract: A non-powered evacuation and fill valve assembly is provided that is suitable for use in connection with hydraulic brake system. The assembly utilizes a pressure differential and/or the properties of material expansion to provide a tight seal. During evacuation of air from the system, the assembly is in an “open” position to permit air to pass. After the air has been evacuated from the system and the system has been filled with fluid, the valve assembly will assume a “closed” position. Thereafter, a tight seal is provided as long as the system is filled with a requisite amount of fluid.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: June 18, 2002
    Assignee: Continental Teves, Inc.
    Inventors: Joachim Boeing, Dalibor Zaviska, Vaughn Swanson
  • Patent number: 6309033
    Abstract: A switchable solenoid valve is disposed between the master cylinder port and the wheel caliper port for an anti-lock brake system. The switchable solenoid valve includes a valve housing, a valve seat that includes a center orifice and a plurality of perimeter bores, and an axially moveable valve plate and tappet for sealing against the valve seat. The switchable solenoid valve is movable between a normally open position, a closed position and an intermediate position that occurs when the brake system is in anti-lock mode. In the open position, both the valve plate and tappet are spaced away from the valve seat to allow unrestricted pressure fluid flow between the master cylinder and the wheel caliper. When the solenoid valve is moved in to the closed position, the valve plate is in face-to-face engagement with the valve seat to seal the perimeter bores while the tappet is simultaneously sealingly engaged with the center orifice.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: October 30, 2001
    Assignee: Continental Teves, Inc.
    Inventor: Dalibor Zaviska
  • Patent number: 6269921
    Abstract: A one-time bleed valve with reset capability for an anti-lock hydraulic control unit comprises a piston adapted to be sealingly installed in a bore made in a body of the hydraulic control unit in response to a brake pressure. The bore is located in a portion of the body that is immediately under a recessed part of the body that accommodates a normally open electromagnet valve. On its one end, the bore is in communication with a primary hydraulic pressure circuit, whereas on another its end it is connected with a low-pressure line. Owing to such a structure, when the piston sits loosely in the bore, an air communication is established between the primary hydraulic pressure circuit and the low-pressure line, and air can evacuate from the low-pressure brake circuit on exposure to a vacuum applied to the primary hydraulic pressure circuit. To provide the bleed valve with a reset capability, an access hole is made between outside of the body and the bore.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: August 7, 2001
    Assignee: Continental Teves, Inc.
    Inventors: David L. Agnew, Dalibor Zaviska
  • Patent number: 6102495
    Abstract: A compact hydraulic unit for slip-controlled brake systems with several hydraulically, mechanically and/or electrically operable functional elements (e.g. accumulator, valve elements, pressure generating and driving elements) arranged in an accommodating member, with several pressure fluid channels connecting the functional elements. The pressure fluid channels create a hydraulically operable connection between at least one pressure fluid supply means and one pressure fluid consumer. A control device can be connected with the valve and the driving elements by means of electrical conductors. The valve elements are arranged in several valve accommodating bores of the valve accommodating member in a first and a second row. Pressure fluid bores are provided between the two diametrically extending valve rows which connect the valve elements and location bores containing the pressure generating element and the driving element.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: August 15, 2000
    Assignee: ITT Automotive Europe GmbH
    Inventor: Dalibor Zaviska
  • Patent number: 6048038
    Abstract: A braking pressure control system comprises a braking pressure generator, a brake-actuating device for at least one vehicle wheel, a connecting line between the braking pressure generator and the brake-actuating device, a shut-off valve in the connecting line which has two switching positions, the connecting line being open in the basic position of the shut-off valve and the connecting line being closed or throttled in the switched position of the shut-off valve, including an outlet line which connects the brake-actuating device to a pressure fluid collecting means, an electromagnetically operated pressure-limiting valve in the outlet line, a wheel sensor which determines the rotational speed of the vehicle wheel and issues a corresponding sensor signal, and an electrical controlling and evaluating unit which has an input for the sensor signal and a first switching output to which a switching signal for the shut-off valve is applied, and a control output which issues a control signal for the current-supply ci
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: April 11, 2000
    Assignee: ITT Manufacturing Enterprieses, Inc.
    Inventors: Dalibor Zaviska, Peter Volz
  • Patent number: 5975654
    Abstract: The invention pertains to a valve unit, comprising a valve housing (8) with a flow control valve, an electromagnetic actuating element (1) that is structurally arranged in series with the flow control valve in the valve housing (8), and a piston (3) that forms the flow control valve and produces an unobstructed pressure medium connection between a pressure medium source (4) and a pressure medium sink (5) in its normal position. In its normal position, the actuating element (1) is supported on one end face of the piston (3) against the force of a compression spring (2). In the operating position, the actuating element separates from the piston (3) and assumes an intermediate position in which it controls the volume flow of the pressure medium between the pressure medium source (4) and the pressure medium sink (5). This results in a simple and reliable valve construction.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: November 2, 1999
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventors: Dalibor Zaviska, Paul Linhoff
  • Patent number: 5975653
    Abstract: A compact hydraulic unit for slip-controlled brake systems with several hydraulically, mechanically and/or electrically operable functional elements (e.g. accumulator, valve elements, pressure generating and driving elements) arranged in an accommodating member, with several pressure fluid channels connecting the functional elements. The pressure fluid channels create a hydraulically operable connection between at least one pressure fluid supply means and one pressure fluid consumer. A control device can be connected with the valve and the driving elements by means of electrical conductors. The valve elements are arranged in several valve accommodating bores of the valve accommodating member in a first and a second row. Pressure fluid bores are provided between the two diametrically extending valve rows which connect the valve elements and location bores containing the pressure generating element and the driving element.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: November 2, 1999
    Assignee: ITT Automotive Europe GmbH
    Inventor: Dalibor Zaviska
  • Patent number: 5963120
    Abstract: A coil support for accommodating at least one coil wire of an electromagnet, more particularly for use in electromagnetic valves, includes a hollow-cylinder-shaped support part having ends which are provided with stops defining the coil in its axial position. The support part has a step in its diameter which is limited on both sides by the coil wire with different winding layers and on which the coil wire is guided.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: October 5, 1999
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventor: Dalibor Zaviska
  • Patent number: 5944498
    Abstract: A pump having a simple and compact construction which permits leakage test of the pressure valve both outside and inside the pump housing, and, if necessary, ensures ease of replacement of individual parts, such as replacement of the pressure valve or the valve seat member, if leakage occurs during testing. The peripheral surface of the valve seat member facing the cover has a conical chamfer onto which an annular projection of the cover is movable into sealing abutment and is radially expandable to provide a press fit engagement.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: August 31, 1999
    Assignee: ITT Automotive Europe GmbH
    Inventors: Hans Wupper, Dalibor Zaviska
  • Patent number: 5918949
    Abstract: A brake system including a master cylinder connected to wheel brakes is supplemented by a fluid return system made up of return pumps so that the braking pressure can be adjusted in the wheel brakes. In order to extend this system to a brake system which permits the generation of wheel brake pressure without the application of the brake pedal, the suction side of at least one return pump is connected to the pressure side of a charging pump which aspirates fluid directly from the supply reservoir. To prevent the pressure in the low-pressure range of the system from rising excessively high, the charging pressure of the pump is adjusted so that it only slightly exceeds the precharging pressure of the suction side of the low-pressure accumulator.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: July 6, 1999
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Peter Volz, Dalibor Zaviska, Paul Linhoff
  • Patent number: 5803556
    Abstract: A hydraulic brake system with skid control is provided with digitally switchable inlet and outlet valves. An inlet valve includes a variable flow area valve control that is actuated as a function of differential pressures in order to reduce the valve noise.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: September 8, 1998
    Assignee: ITT Automotive Europe GmbH
    Inventors: Helmut Weis, Klaus-Diether Fischer, Peter Volz, Dalibor Zaviska, Paul Linhoff, Ralf Kaiser
  • Patent number: 5653249
    Abstract: A method for closing channels containing pressure fluid in a housing, so that the dynamic load applied to the housing and the closing member during the pressing process is minimized. Thus a pressing force with a defined direction and entity acts discontinuously on the closing member, the latter realizes a discontinuous feed motion directed into the channel, acting only on the housing material at the recess of the closing member producing the form-lock to yield into the recess due to the discontinuous force impact on the closing member.
    Type: Grant
    Filed: October 11, 1995
    Date of Patent: August 5, 1997
    Assignee: ITT Automotive Europe GmbH
    Inventors: Hans-Dieter Reinartz, Peter Volz, Dalibor Zaviska, Helmut Weisbrod
  • Patent number: 5647644
    Abstract: A solenoid valve for use with a slip-controlled brake system has an annular piston with a switchable diaphragm in order to lower the valve noises. The annular piston moves, in response to differential pressure, between a first position at which a pressurized medium flow path parallel to the diaphragm exists and a second position at which pressurized medium flows exclusively through the diaphragm. A pressurized agent channel, arranged upstream of the valve seat, has a portion having a reduced cross section relative to the valve seat, into which a channel branch of small nominal diameter opens. With this design, the pressure energy of the pressurized medium column flowing into the solenoid valve is converted into kinetic energy, which initiates a pressure gradient in the channel branch and prevents premature switching of the annular piston into the diaphragm position during slip-free normal braking.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: July 15, 1997
    Assignee: ITT Automotive Europe GmbH
    Inventors: Peter Volz, Dalibor Zaviska
  • Patent number: 5628550
    Abstract: An anti-lock hydraulic brake system comprising a master cylinder and a wheel brake, with a flow control valve being inserted into the brake line. A non-return valve is inserted into the brake line. A direct connection is established between the wheel brake and the master cylinder, with a non-return valve opening towards the master cylinder. A pump supplies fluid into the brake line between the non-return valve and the flow control valve. A high-pressure accumulator is provided on the pressure side of the pump.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: May 13, 1997
    Assignee: Itt Automotive Europe GmbH
    Inventors: Dalibor Zaviska, Peter Volz
  • Patent number: 5626326
    Abstract: This invention relates to a valve with a valve housing which has several valve components. Sealing surfaces are provided on the circumference of the valve housing which correspond with a valve accommodating body carrying the valve housing. These surfaces are adapted to engage the valve accommodating body where (in dependence on the relative motion of the valve housing in respect of the valve accommodating body) the material volume existing on the circumference of the and plastically displace it into a circumferential recess of the valve housing.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: May 6, 1997
    Assignee: Alfred Teves Metallwarenfabrik GmbH & Co. OHG
    Inventors: Andre F. L. Goossens, Helmut Weisbrod, Ulrich Zutt, Antoine Rottiers, Dalibor Zaviska, Peter Volz
  • Patent number: 5605385
    Abstract: A brake system arranged for the control both of the brake slip and of the traction slip is presented. In order that during a traction slip control action the brake circuits are rapidly supplied with the required volume of hydraulic pressure fluid at a sufficiently high pressure level, a medium-pressure accumulator is provided which is connected to the suction side of the pump and whose pressure supplied upstream of the pump is higher than the resistances in the brake circuit, in particular higher than the sum of the opening pressures of the suction-side and delivery-side valves of the pump plus the resistance of the wheel brake.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: February 25, 1997
    Assignee: ITT Automotive Europe GmbH
    Inventors: Dalibor Zaviska, Paul Linhoff
  • Patent number: 5577813
    Abstract: A compact hydraulic unit for slip-controlled brake systems with several hydraulically, mechanically and/or electrically operable functional elements (e.g. accumulator, valve elements, pressure generating and driving elements) arranged in an accommodating member, with several pressure fluid channels connecting the functional elements. The pressure fluid channels create a hydraulically operable connection between at least one pressure fluid supply and one pressure fluid consumer. A control device can be connected with the valve and the driving elements by means of electrical conductors. The valve elements are arranged in several valve accommodating bores of the valve accommodating member in a first and a second row. Pressure fluid bores are provided between the two diametrically extending valve rows which connect the valve elements and location bores containing the pressure generating element and the driving element.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: November 26, 1996
    Assignee: ITT Automotive Europe GmbH
    Inventor: Dalibor Zaviska
  • Patent number: 5564798
    Abstract: An anti-locking brake system is provided, wherein, during a control operation, the brake conduit is blocked by a separating valve. The wheel brakes, through a return conduit, are in communication with the intake side of a pump. Provided in the return conduit is an outlet valve. The pressure side of the pump, through a pressure conduit, is in communication with the brake conduit between the separating valve and the wheel brake. A restriction element is provided in the pressure conduit. Check valves between the master brake cylinder and the pressure side of the pump enable pressure fluid, if an enhanced amount of pressure fluid is required by the control circuit, to be fed from the master brake cylinder into the control circuit.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: October 15, 1996
    Assignee: Alfred Teves GmbH
    Inventors: Dalibor Zaviska, Paul Linhoff
  • Patent number: 5522426
    Abstract: A valve arrangement, particularly to a solenoid valve arrangement for slip-controlled automotive vehicle brake systems, with a first valve closure member, in particular a hydraulically actuatable non-return valve, and a second valve closure member, preferably electromagnetically controllable by means of an armature and a magnet coil and arranged in a valve accommodating bore of the valve housing accommodating the valve arrangement, with both valve closure members being operable independently of each other in terms of action and being jointly arranged in the valve accommodating bore of the further valve closure member. This ensures a compact and easy manufacture of the valve arrangement.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: June 4, 1996
    Assignee: ITT Automotive Europe GmbH
    Inventors: Ulrich Zutt, Helmut Weisbrod, Kurt Wollsiffer, Dalibor Zaviska, Peter Volz
  • Patent number: 5509729
    Abstract: A brake system includes a flow control valve as an inlet valve wherein a restrictor is arranged in the return line and a variable restrictor is arranged in the brake line. The resulting system achieves improved controlled behavior and a reduced capacity pump can be used.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: April 23, 1996
    Assignee: ITT Automotive Europe GmbH
    Inventors: Dalibor Zaviska, Paul Linhoff