Abstract: A co-oscillating, volume-changing resonator in the form of a silencer, includes a lens-shaped housing formed of a material having a given flexural stiffness, the housing being arched defining an evacuated cup-shaped cavity formed therein, and a coating layer completely surrounding the housing, the coating layer being formed of a material having a flexural stiffness being at most one-third of the given flexural stiffness of the material of the housing.

Abstract: A two chamber engine mount with hydraulic damping includes rubber-elastic peripheral walls, a support housing disposed outside at least one of the walls, an orifice plate disposed between the walls defining upper and lower fluid-filled chambers above and below the orifice plate being substantially horizontally divided into an upper plate half being stationary and a lower plate half being rotatable and having a central axis, the orifice plate having an orifice canal formed at least partly in the lower plate half interconnecting the chambers and having a given open length and cross section, a centrally disposed pin integral with the lower plate half and extending through the support housing for rotating the lower plate half about the central axis relative to the upper plate half, varying at least one of the length and cross section of the canal.

Abstract: 1A two chamber engine mount with hydraulic damping includes a housing having rubber-elastic walls, an intermediate plate disposed in the housing between the walls dividing the housing into fluid-filled chambers, the intermediate plate having a substantially spiral-shaped canal formed therein interconnecting the chambers, the canal having a length being a multiple of the diameter thereof, and the intermediate plate having at least one orifice vertically formed therethrough being hydraulically parallel with the canal.

Abstract: An electroviscous fluid comprising more than 25% by weight of silica gel with a water content of 1 to 15% by weight, a non-conductive oily phase dispersion medium, 1 to 30% by weight of one or more polymers soluble in the dispersion medium, the weight percentage being based on the water-containing silica gel, and the polymers having a molecular weight in the range of from 5.times.10.sup.3 to 10.sup.6 and containing 0.1 to 10% by weight of N and/or OH and 25 to 83% by weight of C.sub.4 to C.sub.24 -alkyl groups. Such electroviscous fluids are useful for transmitting powerful forces by means of a low electronic output, for example, in hydraulic valves and shock absorbers.

Abstract: A pretensionable and hydraulically damped mounting element with an outer mounting sleeve, 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, and 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 variable cross section includes means defining axially extending additional chambers arranged at both sides of the inner part of the elastomer body, the additional chambers communicating with the channel.

Abstract: A device for the simultaneous sealing of the window pane of a door and the region between the upper edge of the door and the roof region of a motor vehicle includes a single elastomer profile having an outer front surface, the profile including:at least one element for sealing the window pane;at least one element for sealing the region between the upper edge of the door and the roof;a mounting region having two U-shaped recesses formed therein defining holding lips clamped to projecting sheet metal edges of the frame of the door; anda reinforcement insert disposed in the profile, surrounding the two U-shaped recesses and extending to the outer front surface of the profile.

Abstract: A two-chamber engine mount with hydraulic damping, includes a housing, an intermediate plate disposed in the housing dividing the housing into an upper chamber above the intermediate plate and a lower chamber below the intermediate plate to be filled with fluid, the intermediate plate having a damping opening formed therein for fluid passage, an upper rubbery elastic peripheral wall at least partially defining the upper chamber, a lower cup-shaped rubbery elastic peripheral wall with a given hardness at least partially defining the lower chamber, an upper motor support plate disposed above the upper chamber, the upper support plate having a membrane chamber centrally formed therein to be filled with air, and a rubbery membrane having a greater hardness than the given hardness separating the membrane chamber from the upper chamber.

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.

Abstract: The electroviscous suspension is based on a mixture of aqueous silica gel with silicone oil as the liquid phase to which a dispersant is added. The dispersant consists of amino functional or silicon-functional polysiloxanes having a molecular weight above 800. The concentration of the dispersant is from 1 to 30% by weight and preferably from 5 to 20% by weight, based on the silica gel particles. Electroviscous suspensions such as these are distinguished by the fact that they are highly compatible with elastomeric materials, non-sedimenting, non-inflammable and physiologically acceptable. In addition, they are heat- and freeze-resistant over a wide temperature range and are largely unaffected by temperature and pressure in their viscosity.

Abstract: A two-chamber engine mount with hydraulic damping, includes a housing, an intermediate plate disposed in the housing dividing the housing into an upper chamber above the intermediate plate and a lower chamber below the intermediate plate to be filled with fluid, the intermediate plate having a damping opening formed therein hydraulically interconnecting the chambers for preventing a hydraulic response upon the occurrence of high frequency and low amplitude vibrations, upper and lower rubbery elastic peripheral walls at least partially defining the upper and lower chambers, respectively, a motor support plate adjacent the upper chamber, the support plate having a membrane chamber centrally formed therein, and a rubbery membrane separating the membrane chamber from the upper chamber, the rubbery membrane including a solid central quenching mass.

Abstract: The invention relates to a two-chamber engine bearing, in particular for motor vehicles, which has hydraulic damping, the liquid-filled chambers of which have rubber elastic peripheral walls and are connected to each other by a line which is provided in the rigid, elastically-mounted intermediate plate. To improve the damping, the intermediate plate has, according to the invention, an extended cavity which has an approximately rectangular longitudinal cross-section in the area of the middle plane thereof, the length and width of the cavity being many times its height and the cavity being connected to the upper chamber at one end by a vertical passage and connected to the lower chamber at the other end by a corresponding passage.

Abstract: A device for guiding and holding an edge region of a window pane to body parts of a motor vehicle, includes a one-piece metal profile having a U-shaped clamping region and a window pane guiding region, a first rubber profile disposed in the U-shaped clamping region for surrounding the body parts, and at least one second rubber profile disposed in the window pane guiding region for guiding and retaining the edge region of the window pane.

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.

Abstract: A front wheel tire for a motorcycle includes a support structure and a profiled running surface disposed on the support structure, the running surface having grooves formed therein in the form of a central groove extending in circumferential direction, and mutually parallel transverse grooves emanating from the central groove, the grooves defining blocks therebetween having parallelogrammatic cross sections and being disposed symmetrical to and laterally of the central groove, the blocks and the transverse grooves being inclined in the shape of an arrow at an angle of substantially between 60.degree. and 85.degree. to the central groove in traction direction of the tire.

Abstract: A support ring assembly includes a support ring formed of synthetic material to be fastened on a shaft for a balancer of torsional vibrations, the support ring having lateral surfaces and a plurality of openings formed therein, and a plurality of metal fastening bushings disposed in the openings, the bushings having end surfaces aligned with the lateral surfaces, and the bushings including devices for locking the bushings into the support ring.

Abstract: A decoupling device for engine mounts having upper and lower liquid chambers containing hydraulic fluid for damping vibrations, includes a diaphragm liquid-tightly fastened to an upper region of the upper liquid chamber defining a diaphragm chamber divided-off from the upper liquid chamber, the diaphragm including a circular rubber body and a vibration-cancelling mass in the form of a central, circular, metallic disc adhering to the circular rubber body, the circular rubber body having upper and lower surfaces, each of the surfaces having two concentric, conical, circular slots formed therein being inclined toward each other as seen in direction from the horizontal central plane of the circular rubber body toward the surfaces thereof, and the slots being extended to the vicinity of the horizontal central plane of the circular rubber body.

Abstract: A device for the manufacture of molded parts from molding materials, includes a molding tool being completely closed, having a molding cavity formed therein and being divisible, a heating device having two heating plates disposed on top of each other and fastened to the molding tool, the heating plates being in mutual contact along respective contact surfaces thereof, at least one of the contact surfaces having slots formed therein, and tubular electrical heating elements with metal cladding press-fitted in the slots.