Patents by Inventor Vatroslav Grubisic

Vatroslav Grubisic 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: 6382020
    Abstract: The invention provides a device for testing motor vehicle wheels, tires, wheel hubs, wheel bearings, and wheel bolts under loading conditions similar to operating conditions, including a mounting device for pivoting attachment of a vehicle wheel; a drum arranged around the vehicle wheel in such a way that the vehicle wheel can be brought into rolling contact with the inner circumferential surface of the drum; a vertical or radial loading device which, in order to apply a vertical or radial force acting in the vertical or radial direction of the vehicle wheel onto the mounting device, is connected with the latter; a lateral or axial loading device for applying a lateral or axial force acting in the lateral or axial direction of the vehicle wheel, in order to apply the lateral or axial force onto the mounting device, the lateral or axial loading device being connected with the mounting device; at least one ring located on the inner circumferential surface of the drum, which ring is arranged as a thrust ring adj
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: May 7, 2002
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Gerhard Fischer, Vatroslav Grubisic, J├╝rgen Klock
  • Patent number: 6116084
    Abstract: A device for testing vehicle wheels, tires, hubs, bearings and bolts therr under service-like load conditions, includes (a) a mounting device for fastening a vehicle wheel in a rotatable manner and for swivelling the latter into different camber angles; (b) a drum, which is disposed in such a manner around the vehicle wheel that the vehicle wheel may, via a tire situated thereon, be brought into rolling contact with the inner peripheral surface of the drum; (c) a vertical or radial loading device, which for applying a vertical or radial force onto the mounting device is connected to the latter; (d) a lateral or axial loading device for applying a lateral or axial force acting in the lateral or axial direction of the vehicle wheel, the lateral or axial loading device for applying the lateral or axial force onto the mounting device being connected to the latter; (e) at least one ring, which is disposed on the inner peripheral surface of the drum and arranged as a stop ring adjacent to the tire and the flank of
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: September 12, 2000
    Assignee: Fraunhofer Gesellschaft Zur Farderung der Angeswandten Forschung E.V.
    Inventors: Gerhard Fischer, Vatroslav Grubisic
  • Patent number: 5487301
    Abstract: A test rig for testing motor-vehicle assemblies includes a loading device for inducing vertical forces, lateral forces, longitudinal forces and braking or driving forces in the motor-vehicle assembly. The test rig includes a control device for controlling the loading device in such a way as to ensure that the vertical forces, lateral forces, longitudinal forces and braking or driving forces are induced in the motor-vehicle assembly according to a predetermined control loading programme. The control loading programme causes different loading cases of the motor-vehicle assembly, which are realistic in terms of the physics of driving, to be simulated repeatedly in a temporally consecutive sequence. The control loading programme is a standardised basic programme adapted, with the aid of vehicle-and/or axle-specific conversion values and test-rig-specific conversion values, to the given motor-vehicle assembly to be tested in the given case.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: January 30, 1996
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung
    Inventors: Andreas Muller, Vatroslav Grubisic, Gerhard Fischer
  • Patent number: 5026122
    Abstract: A wheel is provided for a commercial vehicle which comprises a wheel disk having bolt holes in the region of the wheel mounting face for attaching the wheel disc to a wheel hub flange or to a brake drum by way of wheel bolts and intermediate disks surrounding the bolt holes directly and concentrically and which by themselves provide a support surface between wheel mounting face wheel hub flange or, respectively, brake drum or dual wheel. The intermediate disks allow to avoid fretting corrosion in the support region of the wheel disc, stiffening of the wheel disk central region, avoiding of surface damage, and improvement of the bolting. The intermediate disks can be solidly attached to the wheel disk by way of adhesive disposed in between, by friction setting, or by casting.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: June 25, 1991
    Inventors: Vatroslav Grubisic, Gerhard Fischer
  • Patent number: 5024102
    Abstract: The invention provides a device for testing trailer couplings which transmit a traction to a trailer by way of a trailer coupling ring on the drawbar of the trailer, the test being carried out under loading conditions similar to those occurring in practice, preferably with inclusion of the construction for fixing the trailer coupling, in particular the tail cross-member to which the trailer coupling is attached and optionally frame parts adjoining the tail cross-member. A longitudinal force generating device which produces a longitudinal force acting in the direction of traction of the connection between the trailer coupling and the trailer coupling ring and a vertical force generating device which produces a vertical force extending perpendicularly or approximately perpendicularly to the direction of action of the traction are coupled to a force transmitting connecting member to which can be attached the trailer coupling ring which is connected to the trailer coupling.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: June 18, 1991
    Assignee: Fraunhofer-Gesellschaft
    Inventors: Jurgen Klock, Gerhard Fischer, Vatroslav Grubisic
  • Patent number: 4951504
    Abstract: The invention provides a process and an apparatus for testing commercial icle axles and/or springs and/or components adjacent thereto under load conditions resembling those occurring in practice. An entire commercial vehicle axle with two commercial vehicle springs and original attachment parts are tested by the introduction of low frequency deformations of vertical forces into a supporting assembly and of lateral forces, longitudinal forces and high frequency vertical wheel forces in each case into a wheel substitute or wheel or a brake force transmitting lever. In the course of this test, the supporting assembly is tilted about a pivot shaft or pivot axis which is displaceable in the vertical direction so that the axle of the commercial vehicle remains parallel to the horizontal.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: August 28, 1990
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Jurgen Klock, Gerhard Fischer, Vatroslav Grubisic
  • Patent number: 4842338
    Abstract: A wheel is provided for a commercial vehicle which comprises a wheel disc having bolt holes in the region of the wheel mounting face for attaching the wheel disc to a wheel hub flange or to a brake drum by way of wheel bolts and intermediate disks surrounding the bolt holes directly and concentrically and which by themselves provide a support surface between wheel mounting face, wheel hub flange or, respectively, brake drum or dual wheel. The intermediate disks allow to avoid fretting corrosion in the support region of the wheel disc, stiffening of the wheel disc central region, avoiding of surface damage, and improvement of the bolting. The intermediate disks can be solidly attached to the wheel disc by way of adhesive disposed in between, by friction setting, or by casting.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: June 27, 1989
    Inventors: Vatroslav Grubisic, Gerhard Fischer
  • Patent number: 4800748
    Abstract: The invention provides a method and an apparatus for testing wheel-sets of ail vehicles under loading conditions resembling those occurring in service, in which radial and/or axial forces are introduced into the wheel via the contact point of the wheel and the rings which represent the rail simulating all operational loading conditions. In a particular embodiment of the method and the apparatus according to the invention, it is also possible to introduce additional axial forces into the wheel contact point of one or both vehicle wheels through the rim and the rings which represent the rail on which the wheel runs during the test in addition to the axial forces introduced through the axle. It is possible by this arrangement to test a whole wheel-set of a rail vehicle and so to determined its reliability possible critical areas under operational loading conditions.
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: January 31, 1989
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Gerhard Fischer, Vatroslav Grubisic
  • Patent number: 4724703
    Abstract: The overall deformation of a tire is measured by using two reference points in different parts of or at least in close proximity to different parts of the rim of the wheel, the reference points are spaced apart in a direction transversely to the plane of rotation of the tire; two transducers are respectively connected to the reference points and to the same particular point on the inside of the tire opposite the running surface to establish a triangle in a cross sectional radial plane of the tire; each of the transducers includes a force sensing element responsive to the change in distance between the respective reference point and the measuring point; the transducers further including tension springs to establish mobility as between the measuring and reference points.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: February 16, 1988
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Juergen Neugebauer, Vatroslav Grubisic, Walter Diefenbach
  • Patent number: 4475383
    Abstract: An apparatus for testing vehicle wheels with tires and wheel hubs. A frame as an axle supporting a wheel. An annular wheel contact member surrounds the wheel and is engaged by the wheel in surface-to-surface contact. The frame is loaded by a variable or constant load to cause deflection of the axle which supports the wheel. The force condition imposed on the frame thus arises as a reaction force at the wheel when it is deflected into engagement with the wheel contact member. A drive means rotates the wheel contact member while the wheel is forceably engaged with the wheel contact member to simulate operating conditions. The apparatus can also be used to test two wheels in tandem arrangement, as well as for individual component testing of the wheel hub, hub bearings and wheel bolts.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: October 9, 1984
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Gerhard Fischer, Vatroslav Grubisic