Abstract: A hydraulic twin-pipe shock absorber for horizontal use and which is particularly suitable for use with rail vehicles. The shock absorber includes a cylindrical housing with a fluid-filled working cylinder provided inside the housing. A piston is displaceable in the working cylinder and is connected to a clearance between the housing and the working cylinder. The construction of the shock absorber removes air and foam from the working cylinder so that pressure builds up evenly and uniformly.
Abstract: A pneumatic suspension system between relatively-vibratable structures has a single expansible pneumatic working chamber for pneumatically isolating the vibrations between the structures and inlet and outlet valves responsive to a control for opening only one at a time in response to vibrations which exceed respective vibration thresholds. The valves then admit or vent gas from the working chamber to damp vibrations in the threshold-determined range which includes resonance.
Abstract: A brake disc assembly with fasteners for securing the disc to a wheel, together with spacers associated with the fasteners for allowing the disc limited axial play relative to the wheel, there being a holder on the disc having surfaces between which the spacers are gripped.
Abstract: The present invention teaches a double-acting compression actuatable slack adjuster to adjust the slack in the brake rigging of a railway vehicle which includes a pair of elongated members movable with respect to each other in a longitudinal direction. One of the elongated members is hollow and the other member includes a threaded portion housed within the hollow member. A positioning device carrying a pair of opposed abutting surfaces is threadedly engaged with the threaded portion of the one member. A pair of opposite facing abutment surfaces are positioned within the hollow member. A first urging device is positioned to urge the positioning device into a disengaged position. A second urging device overcomes the force of the first urging device and urges an abutting surface on the positioning device into engagement with an adjacent abutment surface. An overtravel control device is provided which is activated by a trigger device.
Abstract: A railroad vehicle end-of-car center coupler includes a telescopic energy absorber comprising a hollow cylindrical plunger in a cylinder having one closed end. The plunger has an aperture in its inner end wall. A perforated metering tube is fixed in the closed end wall by a special fixing arrangement. It projects through the aperture and carries an annular piston head which slides in the bore of the plunger. A floating piston divides the interior of the plunger into a gas space and a liquid chamber. Four direct acting pressure relief valves are mounted in the piston head. Conduits through the tube connect their inlets to respective ones of four axially-spaced ports in the outer surface of the tube so that they all communicate with the annular chamber that surrounds the tube within the plunger when the absorber is compressed and so that they are progressively cut-off from such communication during the final stages of extension of the absorber.
Abstract: An adjustable shock absorber for motor vehicles has a cylinder containing damping fluid, a piston rod arranged to be axially displaceable in the cylinder, and a damping piston secured to the inner end of the piston rod. The damping piston divides the cylinder chamber into two working chamber compartments and is provided with fluid flow passages which produce damping forces, the effective cross-section of these flow passages being controllable by a throttling member and an electromagnetic drive controlling the throttling member, with the electromagnetic drive including a coil winding which is mounted in the damping piston. In order to achieve improved control of the damping force the throttling member is under the influence on the one hand of the fluid pressure difference between the two working chamber compartments and on the other hand of a restoring force which is created by the electromagnetic drive.
September 6, 1984
Date of Patent:
April 28, 1987
August Bilstein GmbH & Co KG
Hans Munning, Jurgen Bock, Bernd Oldach, Josef Ladic, Max-Otto Rauert, Hugo Emde, Dietrich Petzsch, Johannes J. de Baan
Abstract: An angular non return device is provided associated with a turnstile (1) having an axis X and capable of acting at will in one or the other direction. This device comprises a drum of revolution (2) integral with the turnstile and coaxial therewith, a fixed vee (3) whose bisecting plane contains the axis X, a roller (4) interposed between the vee and the drum and mounted on a lever (5) so that it may be moved between a first end position in which it is locked by jamming between the drum and a face (3.sub.1) of the vee and a second end position in which it is locked by jamming between the drum and the other face (3.sub.2) of the vee, and electromagnetic elements (6 to 10) for urging the roller at will towards one or other of its two end positions. Portions (14, 15) of the drum are recessed so as to prevent locking of the turnstile in certain angular positions.
Abstract: The rotating brake plates and the fixed brake plates of a power train brake are pressed by way of the movement of the brake piston due to the supply of hydraulic pressure, thereby braking the output shaft. The guide rod is cantilever supported in the housing. The guide rod is inserted into a hole in the projecting portion at the outer periphery of the piston. The return spring is interposed between the flange portion at the end of the rod and the piston. When the hydraulic pressure is released, the brake piston is returned by the force of the return spring.
Abstract: Flexurally stiff members having low torsional stiffness, high transverse shear resistance and high stability are disclosed. In several embodiments, each member includes a flexurally and torsionally stiff tapered elongate beam surrounded by an outer tube-like component of lower torsional stiffness and interconnected by an elastomeric medium which enables the tube-like component to twist relative to the beam while permitting some of the flexural and transverse loads applied to the tube-like component to be transferred to the beam. In several embodiments, the tube-like component includes a pair of interarranged corrugated open section members engaged by one or more stabilizers, including a shrunk fit tube of elastomeric material extending lengthwise between attachment fittings at opposite ends. End fittings for applying various loads to the members are also disclosed.
Abstract: In the process for producing a leaf spring which, at least in essential springy sections, is composed of a fiber-reinforced plastic material, a continuous web (9) is formed comprised of reinforcing fibers, appropriately in the form of fiber rovings or fibrous tissues, with the reinforcing fibers being appropriately impacted or impregnated with a hardenable plastic substance, whereupon intermediate layer pieces (37) are appropriately put on the continuous web (9). The continuous web (9) is then wound up in several layers (36) on a rotating pick-up device (27) into a continuous reel (35), with the intermediate layer pieces (37) arranging themselves in the continuous reel (35) between contiguous superposed continuous web layers (36); the continuous reel (35) is then placed in a mold in such a manner that it adjoins along its entire periphery the barrel-shaped contact area of the mold chamber.
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: A dual path rolling lobe air spring suspension strut with the inner rolling lobe air seal eliminating air pressurization of the strut to eliminate the strut mount as a leak path and so that the sealing of air within the air spring in the vicinity of the strut rod is eliminated so that the strut rod scraper lip and air pressurization of the strut valving is eliminated.
Abstract: A suspension for a vehicle includes a shock absorber provided with a tube, a piston partitioning the interior of the tube into two liquid chambers and a piston rod connected to the piston having a bypass path for affording communication between the two liquid chambers, a control shaft disposed in the piston rod of the shock absorber to open and close the bypass path, a support interposed between the piston rod and a car body and provided with a valve base connected to the piston rod, having a hole in which a valve body is disposed and a bushing disposed radially outward of the valve base, having two fluid chambers, the valve body disposed in the hole of the valve base to afford and interrupt communication between the two fluid chambers of the bushing and an actuator for operating the control shaft and the valve body.
Abstract: A spring system for providing an elastic force between two machine parts, including concentric compression and tension springs disposed in parallel within a housing, with one pair of corresponding ends of the springs being connected by a movable coupling piece, and the other pair of corresponding ends being connected to a stationary stop and a connecting element, whereby a movable stop permits variation of the effective point of connection between the compression spring and machine part connected therewith.
Abstract: In a vibration absorber, lower and upper holders are interconnected by an annular elastomeric dampening member and have a throttling disk for dividing the interior space of the absorber into two liquid-filled working chambers, of which the lower chamber is defined by a rubber elastic membrane. The membrane and the throttling disk are loosely inserted in the lower holder and held in position therein by a resilient holding device sealingly urging the membrane and the throttling disk against a sealing face on the lower holder.
Abstract: A construction for coupling a car body with a shock absorber having a piston rod comprises a valve base coupled with the piston rod and having a hole extending from an upper end surface to an intermediate portion axially of the piston rod for inserting a valve body, a first path consisting of a plurality of path portions extending from the hole to an outer peripheral surface and having different bores and a second path spaced axially from the first path and extending from the hole to the outer peripheral surface, a bushing having a first fluid chamber communicating to the first path and second fluid chamber communicating to the second path and disposed radially outward of the valve base, a connecting member for coupling the bushing with the car body, the valve body having a third path capable of affording and interrupting communication for the first and second paths and disposed rotatably in the hole of the valve and an actuator for operating the valve body.
Abstract: A vibration damper comprises a housing defining a cavity; a damping mass accommodated for oscillation in the cavity between wall surfaces; and spring elements situated on two opposite sides of the damping mass. Each spring element is in engagement with the damping mass and a respective one of the wall surfaces for positioning the damping mass in the cavity. Each spring element has a shape selected to confer to the spring element a dynamic deformation behavior characterizing spherical bodies. Further, the spring elements, as viewed together, are arranged at least approximately symmetrically with respect to a central axis of the damping mass oriented parallel to the path of oscillation. The vibration damper also includes an arrangement for guiding the damping mass linearly along the path of oscillation.
September 17, 1985
Date of Patent:
March 17, 1987
SIG Schweizerische Industrie-Gesellschaft
Abstract: A telescopic hydraulic shock absorber including a base valve assembly having a valve body with three arcuate slots which lie between two concentric valve seats which are overlain by a flat annulus constituting a recuperation valve. This valve is normally held in contact with the valve seats by a recuperation valve spring. A passage of complex shape extends through the center of the valve body and the mouth of the passage at the lower end is surrounded by an annular valve seat. A compression valve pin with a shank cooperates with the valve seat to form a compression valve and the shank is guided in a valve guide located in a counterbore in the aperture. The valve guide comprises a solid ring portion having six integral projections. There is an annular clearance between the valve pin and the part of the passage which is in communication with an annular space between the ring portion and the part of the passage through the passageways between the projections of the valve guide.
Abstract: The invention relates to an antivibration support comprising, between two rigid elements, a box which defines two deformable chambers filled with liquid separated by a deformable partition and communicating with each other through a throttled passage. The partition is constituted by a diaphragm surrounded by a beading which is gripped between two perforated thin metal disks, the periphery of the first disk alone is overlapping and fixed to one of the rigid elements, and the passage comprises a curvilinear channel bounded by areas of the beading, of the first disk and of an elastic wall of the box.
February 26, 1985
Date of Patent:
March 3, 1987
Jean Ray, Daniel Gregoire, Pierre Jouade
Abstract: In a pneumatic or hydropneumatic tension spring which consists of a container in which a cylinder is concentrically arranged and a liquid and/or gas filling under pressure has an inward force upon a piston rod, between a working chamber on the piston rod side and an annular chamber a damper device is arranged which generates a greater damping effect in the inward movement of the piston rod than in the outward movement of the piston rod. Due to this measure a damped inward movement of the piston rod is achieved while the extraction of the piston rod can be effected without appreciable damping.