Patents by Inventor Rainer Andra

Rainer Andra 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: 6846240
    Abstract: Disposed around a universal joint (12), which comprises a first and a second substantially rigid joint body (14, 28), is a rim (40) of loop-shaped flexible coupling elements (42), which are each looped around one first molded piece (50) and one second molded piece (52). The first molded pieces (50) are connected rigidly to a flange (22) on the first joint body (14) and disposed between second molded pieces (52). The second molded pieces (52) are connected firmly to a counter-flange (34), which forms part of a rotational body (62). The latter forms one end of a torque transmission chain, the other end of which is the second joint body (28). The first joint body (14) has a tubular piece (16), which encloses the second joint body (28) and has an outer lateral surface (18) of circular cross section, against which the flexible coupling elements (42) are supported in radial direction.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: January 25, 2005
    Assignee: SGF Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
    Inventor: Rainer Andrä
  • Publication number: 20040058736
    Abstract: Disposed around a universal joint (12), which comprises a first and a second substantially rigid joint body (14, 28), is a rim (40) of loop-shaped flexible coupling elements (42), which are each looped around one first moulded piece (50) and one second moulded piece (52). The first moulded pieces (50) are connected rigidly to a flange (22) on the first joint body (14) and disposed between second moulded pieces (52). The second moulded pieces (52) are connected firmly to a counter-flange (34), which forms part of a rotational body (62). The latter forms one end of a torque transmission chain, the other end of which is the second joint body (28). The first joint body (14) has a tubular piece (16), which encloses the second joint body (28) and has an outer lateral surface (18) of circular cross section, against which the flexible coupling elements (42) are supported in radial direction.
    Type: Application
    Filed: September 12, 2003
    Publication date: March 25, 2004
    Inventor: Rainer Andra
  • Patent number: 6343777
    Abstract: A suspension lug has a ring shaped elastomer body in which two fixing parts are arranged opposite each other, and a flexible insert shaped like a loop which is embedded in the elastomer body in such a way that it transmits tensile forces from one fixing part to the other when the suspension lug is subjected to tensile loading. At least one of the fixing parts has attachment areas on which the insert is hung in such a way that the insert extends essentially radially away from this fixing part. As a result, the structural height of the suspension lug is relatively small.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: February 5, 2002
    Assignee: SGF Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
    Inventor: Rainer Andrä
  • Patent number: 6315670
    Abstract: A joint body includes at least one loop package and collar bushings each having a bushing member and a first collar formed integrally thereon. The bushing members of the collar bushings are passed through the loop package, and the collars thereof axially support a first loop package side. A second collar axially supports a second loop package side and is axially joined with each bushing member. The collar bushing has at an end of the bushing member remote from the first collar a radial outer catching arrangement. A radial inner catching arrangement is provided on the second collar which forms a snap connection together with the radial outer catching arrangement. The loop package is at least partially embedded in a rubber elastic jacket.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: November 13, 2001
    Assignee: SGF Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
    Inventors: Rainer Andrä, Wilfried Schneider, Georg Maierbacher
  • Patent number: 6068555
    Abstract: A flexible disc is arranged between first and second flanges each designed to be secured to a shaft, the flexible disc being alternately fixed at angular spacings to one each of the flanges. A torsional vibration suppressor is associated with one of the two flanges and has a suppressor collar integrally formed with the flange, a gyrating mass, and a rubber spring suspension system which is secured by vulcanization to the suppressor collar and the gyrating mass. A centering device having a centering collar formed integrally with the flange, a centering body rigidly connected to the other flange, and a rubber spring suspension system secured by vulcanization to the centering collar, is provided for mutually centering the two shafts. This obviates the need for expensive fits or matches and facilitates the assembly of the shaft coupling.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: May 30, 2000
    Assignee: SGF Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
    Inventors: Rainer Andra, Wilfried Schneider
  • Patent number: 5766675
    Abstract: A method of forming flexible disks containing annular loop packets for the purpose of transmitting traction forces between fastening elements is disclosed. The loop packets and the fastening elements are combined into a ring and subsequently embedded in rubber-elastic material. In a preparatory operation, the loop packets are injection-coated either individually or in groups by a coating of elastomer material, which defines and stabilizes their outer contour. The elastomer material is only partially vulcanized before the ring is completely embedded in the rubber-elastic material. Injection coating renders the loop packets or groups of loop packets into components which are true to shape and size with defined wall thicknesses. Consequently, the characteristics and the life of the flexible disks are standardized for mass production and material consumption is reduced.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: June 16, 1998
    Assignee: SGF Suddeutsche Gelenkscheibenfabrik GmbH & Co. KG
    Inventors: Rainer Andra, Anton Hingerl, Wolfgang Nindel
  • Patent number: 5058267
    Abstract: A process of producing a torsional vibration damper, in which a flywheel ring is supported on a hub ring by means of a rubber-elastic body of annular configuration which is vulcanized to both ring surfaces. The elastic body contains a loosely embedded guiding ring which improves the radial and axial guidance of the flywheel ring.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: October 22, 1991
    Assignee: Firma Carl Freudenberg
    Inventors: Rainer Andra, Gunter Engemann
  • Patent number: 4914949
    Abstract: A torsional vibration damper in which the hub ring and the flyring are interconnected through vulcanized-in basic resilient elements as well as resilient units made of rubber that are uniformly distributed around the circumference. These consist of columnar first and second resilient elements which at their outer surfaces merge into one another and at their inner surfaces are spaced from one another. The second resilient elements are precompressed by the first resilient elements and, when the torsional vibration damper is not rotating, are spaced at their outer surfaces from the inner surface of the flyring. At a desired speed of rotation, they are caused by centrifugal force to bear immovably on the inner surface of the flyring. This mechanical connection places their spring action in parallel with the spring action of the basic resilient elements.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: April 10, 1990
    Assignee: Firma Carl Freudenberg
    Inventors: Rainer Andra, Gunter Ullrich, Werner Bauer, Friedrich Reinhold, Georg Schafer
  • Patent number: 4873887
    Abstract: A torsion-vibration damper comprising a driving ring and take-off ring that are rotatable relative to each other, segment chambers spaced from the axis of rotation, the chambers being bounded by the driving ring and the take-off ring and divided into subchambers by a partition, the subchambers being connected by at least one connecting opening and having at least one boundary formed of a resilient wall part.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: October 17, 1989
    Assignee: Firma Carl Freudenberg
    Inventors: Rainer Andra, Klaus Kurr, Gunter Ullrich, Udo Dorge
  • Patent number: 4779483
    Abstract: A torsional vibration damper comprising a hub ring (2) surrounded by a flyring (1), the two being united by at least one resilient member and being angularly displaceable relative to each other, the resilient member (3, 4) being of columnar shape and extending in the radial direction, and a clearance (6) being provided next to the resilient member in the circumferential direction between the hub ring and the flyring. The resilient member comprises a radially inner first resilient element (3) and a radially outer second resilient element (4). The ends facing each other of the first and second resilient elements (3, 4) are fastened on the inside and outside to one end (5) of a one-armed lever (7) which projects into the clearance (6) between the hub ring and flyring.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: October 25, 1988
    Assignee: Firma Carl Freudenberg
    Inventors: Rainer Andra, Bernhard Rohrig, Gunter Ullrich
  • Patent number: 4757982
    Abstract: An engine mount with hydraulic damping, includes at least one fluid-filled working chamber having a substantially conical shell-shaped rubber-elastic peripheral wall serving as a support spring, a support ring being connected to the peripheral wall and having an upper surface, a thrust element with adjustable radial stiffness in the form of a holding plate vulcanized to the upper surface of the support ring and closing the working chamber along with the support ring, the holding plate having a central cylindrical portion projecting freely into the working chamber and having an inner surface, a bell-shaped expanded ring projecting from the inner surface on the cylindrical portion toward the peripheral wall and having a free end, and a rubber-elastic membrane closing the free end of the expanded ring enclosing a volume of air.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: July 19, 1988
    Assignee: Metzeler Kautschuk GmbH
    Inventors: Rainer Andra, Manfred Hofmann
  • Patent number: 4721288
    Abstract: A two-chamber engine mount with hydraulic damping includes an engine side to be connected to an engine, fluid-filled chambers having rubber-elastic peripheral walls including a chamber disposed closer to the engine side, an intermediate plate disposed between the chambers having a conduit disposed therein through which the chambers are interconnected, an engine support plate at the engine side having a first membrane chamber formed therein, a first membrane closing off the first membrane chamber, the intermediate plate having a second central membrane chamber formed therein, and a second membrane closing off the second membrane chamber from the fluid-filled chamber to the engine side.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: January 26, 1988
    Assignee: Metzeler Kautschuk GmbH
    Inventors: Rainer Andra, Manfred Hofmann
  • Patent number: 4711206
    Abstract: A two-chamber engine mount with hydraulic damping includes rubber-elastic peripheral walls, a rigid intermediate plate disposed within the peripheral walls defining two chambers along with the peripheral walls being acted upon by vibrations induced in a given direction, hydraulic fluid filling the chambers, the intermediate plate having a channel formed therein interconnecting the chambers, the intermediate plate having another chamber formed therein, and a rubber-elastic membrane disc having two sides and being loosely disposed in the other chamber, both of the sides of the membrane disc being acted upon by the hydraulic fluid moving the membrane disc parallel to the given direction for combined frequency and amplitude decoupling.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: December 8, 1987
    Assignee: Metzeler Kautschuk GmbH
    Inventors: Rainer Andra, Manfred Hofmann
  • Patent number: 4700934
    Abstract: A pretensionable and hydraulically damped mounting element with an outer mounting sleeve, and an inner part which is held by an elastomeric body in the interior of the outer mounting sleeve, the elastomeric body above and below the inner part being formed with chambers serving as a mechanical spring and being filled with hydraulic fluid and connected to one another via a channel includes end caps located at respective end faces of the mounting element and being formed of elastic, deformable elastomeric material, the elastomeric body extending from the inner part substantially radially outwardly towards opposite sides of the outer mounting sleeve, the elastomeric body and at least one of the end caps defining the channel therebetween, the channel having a varying cross section.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: October 20, 1987
    Assignee: Metzeler Kautschuk GmbH
    Inventors: Rainer Andra, Manfred Hofman
  • Patent number: 4693455
    Abstract: A two-chamber engine mount with hydraulic damping includes a housing having rubber-elastic peripheral walls and an engine side to be connected to an engine, an intermediate plate dividing the housing into fluid-filled chambers being in communication with each other through a penetration formed in the intermediate plate, and an active vibration generator being integrated into one of the fluid-filled chambers closest to the engine side and being controllable in dependence on predetermined operating parameters.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: September 15, 1987
    Assignee: Metzeler Kautschuk GmbH
    Inventor: Rainer Andra
  • Patent number: 4650168
    Abstract: An elastic engine mount with hydraulic damping includes a working chamber having an end, a compensating chamber, an intermediate plate disposed between the chambers having an annular channel formed therein interconnecting the chambers, a conical shell-shaped elastomer wall partially defining the working chamber, a bearing plate connected to the elastomer wall and bordering the end of the working chamber, a projecting cylindrical ring in the form of a tension and compression stop extending from the bearing plate into the working chamber and having an expanded free end in the form of an inwardly-disposed, radially-outwardly extending rim, a substantially cup-shaped stop ring gripping the expanded free end of the cylindrical ring, the stop ring having an axially-directed region with elongated radial through holes formed therein, and a rubber membrane disposed inside the cylindrical ring covering the cross section inside the cylindrical ring and closing off an air-filled membrane chamber.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: March 17, 1987
    Assignee: Metzeler Kautschuk GmbH
    Inventors: Rainer Andra, Manfred Hofmann
  • Patent number: 4613117
    Abstract: The present invention relates to an engine bearing in particular for motor vehicles which has hydraulic damping and at least one chamber which is filled with liquid and has an approximately conically-shaped, rubber elastic peripheral wall which acts as a bearing spring, the front face of which chamber is sealed by a bearing plate. The present invention provides that the bearing plate has a thrust element on its upper surface, which thrust element is rigid in the axial direction in comparison with the bearing spring and accomodates the mounting and has adjustable radial rigidity to independently set the axial and radial rigidity.
    Type: Grant
    Filed: October 4, 1984
    Date of Patent: September 23, 1986
    Assignee: Metzeler Kautschuk GmbH
    Inventors: Rainer Andra, Manfred Hofmann