Abstract: A piston-rod assembly with a piston rod having at least one attachment at one end. The piston rod is fabricated of fiber reinforced composite. The piston rod has a body of fiber-reinforced ceramic with a basic matrix of carbon fibers or ceramic fibers or both wherein at least silicon carbide is embedded and with an open porosity, at least at the surface layer, of no more than 3% of the volume of that layer admitting lubricants into the pores. The at least one attachment (2, 18a, 19, or 22) includes at least one component of a non-ceramic material that fits into and/or interlocks with the piston rod.

Abstract: A piston for a hydraulic dashpot. The piston (1) is mounted on one end of a piston rod (3), travels back and forth inside a cylinder (2), which it divides into two chambers (4 & 5), and has a body (10) provided with axial channels (6 & 7), each of which can be opened and closed at the end by a one-way valve in the form of a cup spring or stack of cup springs (8 & 9), independently adjusting their tensions for both the compression and the suction phases. The cup springs (8 & 9) rest against and in alignment with the body, and the tension is adjusted by deforming the body resiliently or plasticly against its contact surface.

Abstract: The invention relates to a jack comprising a stand body, which rests on the ground (4) and which consists of a stand column (1) and foot (2), and comprising a supporting arm (5), which is fastened to the stand column (1) in a manner that permits it to move around a fixed horizontal pivotal axis, and which is directly or indirectly raised or lowered in relation to the ground (4) by means of a movement spindle (7). The free end (6) of the supporting arm is provided with a fixed or pivotal supporting part, and the end that engages inside the stand column (1) comprises a denticulation, which engages inside a counter denticulation of a control slide (10) and which displaces the control slide (10) parallel to the longitudinal extension of the stand column (1). The aim of the invention is to simplify the control slide (10) and to make the production thereof more economical.

Abstract: A wheel suspension for land vehicles that is provided with a spring resting against at least one seat, with a dashpot, and with an attachment for a stabilizing rod, whereby one seat can be adjusted axially parallel to the spring. The object of the invention is to allow the stabilizing rod's attachment to be situated in the vicinity of the seat. An attachment (10 or 20) for the stabilizing rod is accordingly directly mounted on or indirectly attached to the spring seat (8). The attachment can also be mounted on or attached to the mechanism that adjusts it, at a variable distance from the seat.

Abstract: A piston-rod scraping ring (7) of elastic material accommodated in an inward opening groove (9) in a dashpot cap (2) and especially intended to scrape water and dirt off a piston rod (1). The object is to allow the ring to be easily inserted into the groove and secured there until the overall dashpot is assembled. The groove is accordingly higher at its outer circumference and its inner circumference (12) is deformed, compressing the rim (8) in place.

Abstract: A hydraulic dashpot with a cylinder (1) full of shock-absorbing fluid, with a piston (3) mounted on the end of piston rod (2), traveling back and forth inside the cylinder, separating the cylinder into two compartments (4 & 5), and provided with ports and shock-absorption valves, and with a variable bypass system accommodated in an axial bore (13) in the piston rod provided with lateral radial openings (11 & 26) extending through the rod. The object is to allow fixed independent establishment of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the suction phase and of the cross-section of the bypass system available for the fluid to flow through as the piston rod travels in the direction associated with the compression phase.

Abstract: Fastening an attaching eye to the base of a dashpot by welding. The object is to simplify tooling and position the parts more accurately. The eye (3) is fabricated from strip, preferably by rolling or bending, prior to welding and is provided with an outward-tapering V-shaped abutment (4). The base (1) is provided with a transverse W-shaped groove comprising two rounded depressions (5 & 6), their depths and middle elevations (7) dimensioned to ensure that the eye will come into contact with the lateral edges (8 & 9) of the groove. The abutment is more or less in alignment with the groove's elevation.

Abstract: A device for attenuating the amplitudes of impacts, especially against the wheel of a vehicle. At least one piston is accommodated in a housing and divides it into two attenuating spaces. The piston is attached to a piston rod and operates in conjunction with a component that handles smaller amplitudes. This component is either a diaphragm or a displaceable rigid disk that divides a space and communicates hydraulically with either the upper or with the lower attenuating space.

Abstract: A regulable hydraulic dashpot for motor vehicles and including a cylinder (1) filled with hydraulic fluid and a piston (2) that is attached to the end of a piston rod (7), travels back and forth inside the cylinder, and divides it into two chambers (3 & 4) that communicate through at least one bypass. The bypass's cross-section can be varied in size by a component that is, preferably continuously, controlled by a motor or magnet. To facilitate adjusting the dashpot, the cross-section varying component is a plate-shaped slide (23) provided with one or more breaches (25) and traveling from side to side, preferably in a slot (24), with its flat surface (27) subjected to fluid from each cylinder chamber alternately by way of channels (14, 15, & 16).

Abstract: In the case of a jack with a supporting element, at which the insertion trunnion (11), which can be folded vertically over a joint (12), is mounted with a stop (16) limiting the depth of insertion, in order to construct the stop (15) and fix it securely and reliably in position in a simple manner and so as to have little weight, it is a part of an intermediate layer, which is disposed in the region of the joint (12) between the insertion trunnion (11) and the supporting element.

Abstract: A hydraulic vibration damper for motor vehicles comprising a cylinder (1) containing damping fluid and a sealed, axially displaceable piston rod (2) that plunges into said cylinder. A damping piston (3) is secured to the lower end of the piston rod and divides the cylinder area into two working areas (4, 5). Said damping piston is provided with passages that can be modified and which are controlled by throttle valve bodies, in addition to a bypass for the pressure and traction stage, whereby the cross-section of the bypass is adjusted by an electrovalve that functions in three or more stages and the toroid coil more or less opens a valve slide (13), whereupon two or more bypass openings are released in a successive manner. The inventive damper is designed in such a way disruptive influences caused by constantly changing hydraulic forces arising from the flow of the damping agent are reduced when the flow from the bypass channels is shifted or controlled.

Abstract: A piston (1) with a piston ring (10) for a hydraulic or pneumatic unit fitted with a damping device and is mounted on a piston rod, dividing a cylinder (9) into two working areas and consisting of at least two parts (2, 9) that are adjacent to a surface (4) extending perpendicularly to the axis of symmetry (5). The piston ring (10) has an axial extension (14) that is several times greater than the thickness (15) of the wall of the ring and is disposed in an outer circumferential groove (6) that extends over both parts (2, 3). The invention provides a piston that prevents rumbles and is easy to produce, requiring only a few components.

Abstract: A dashpot with an inner cylinder (3) accommodated in an outer cylinder (1), and a piston (6) traveling back and forth inside on the end of a piston rod (5) and separating the inner cylinder into two chambers (7 & 8). The piston rod enters the cylinders through a hole at one end that seals it off and positions it. The outer cylinder is provided with a base (4) at the end opposite the end with the hole. The inner cylinder is centered along the axis of the outer cylinder at each end. The cylindrical gap (2) between the two cylinders is provided with a fluid-accommodating compartment (11) and, toward the base, a port (13) opening into the adjacent chamber (8). The chamber accommodates, preferably above the port, a vent (12). The mutually contacting ends of the cylinders are hot or cold welded together at the base end or at the end remote from the base.

Abstract: An instrument for measuring the apical angle of a countersink (3). A jig (5) positions a probe (8) with preferably three branches (11) that rest against the inner surface of the countersink. A contact lever (12) pivots on at least one branch, and rests axially inside the countersink. A dial (13) communicates with the contact lever by way of a sensor (14). The sensor rests against the contact lever remote from the articulation (15) between the lever and the branches.

Abstract: A dashpot piston in halves, the face of each resting against that of the other. The piston can be fastened to the end of a piston rod either directly or by way of a connector. Each half (1 & 2) is provided with a depression (7) along the circumference remote from the face of the other, creating a continuous groove (8) with a shorter diameter and accommodating a piston-assembly ring (9). Manufacture is facilitated by the inclusion of at least one resilient supporting ring (11) between the piston-assembly ring and the base of the groove.

Abstract: A dashpot for wheel suspensions, with a preferably sheet-metal spring cup (6). The cup is attached to a shock absorber or its accommodating tube, supports a helical spring that surrounds the shock absorber or tube, and can be advanced along the shock absorber or tube on threads. To allow the dashpot to be raised and lowered in precise increments, the attachment is maintained tight by a cylindrical housing (3). The housing is provided with a slot extending over its total length and with outside threads. Its inner surface of the housing rests directly against the shock absorber or its tube. The housing operates in conjunction with a height-adjustment ring (12) or neck (7) with matching inside threads on the spring cup. The slope of the threads ensure that the force exerted by the spring on the spring cup will squeeze the slotted housing together radially.

Abstract: A piston (3) for a hydraulic dashpot for motor vehicles, mounted on one end of a piston rod (1) and dividing a cylinder (5) into a two compartments (6 & 7), with two groups of lines (8 & 9) arranged more or less in concentric circles and more or less paralleling the piston rod and conveying hydraulic fluid in opposite directions, and with disk-shaped check valves, to some extent in the form of stacks (15 & 26) of cup springs, at each end that block one group of lines in one direction at a time, whereby the valve that blocks the inner lines (8) comprises either two separated springs (11), one above the other, or a stack (15) of springs, whereby the springs or stack nearer the outlet (10) from the inner lines maintain or maintains one cross-section open for the fluid to flow through, and whereby, when the pressure of the fluid increases, the spring or stack at the other end opens another cross-section for the fluid to flow through and the valve that blocks the outer lines opens intakes into the inner lines.

Abstract: A jack with a leg (1) and a supporting arm (2) articulated together by an articulation (3). The leg rests against the ground (5) by way of a foot (4). The supporting arm is articulated by another articulation (18) at the other end of the supporting arm to a load-support plate (19). The plate supports the vehicle as it is lifted by way of an innermost section (20) located preferably between the sill ridge (21) and the midline, and below the bottom (22), of the vehicle. The plate has a bodywork catch (25) with a bent-up section (26). The bent-up section comes to rest against the outside (23) of the sill (24) when the jack is used and is raised by a spring (28). Adjusting arms (9& 10) are articulated to the leg, to the supporting arm, and to each other, constituting a parallelogram linkage. One end (17) of the supporting arm projects beyond its articulation (7) to its associated adjusting arm (9).

Abstract: A proportional valve for a hydraulic dashpot, with a piston that slides back and forth on the end of a piston rod in a shock-absorbing cylinder. The piston is provided with pressure-sensitive valves for the exchange of fluid during suction and compression states and separates the cylinder into two compartments. Passages are provided for the fluid that applies pressure to the valves to flow through. Space that communicates with whichever compartment it faces and supplies regulating pressure to the particular shock-absorbing valve is provided on the side of the shock-absorbing valve that faces away from the passages. The piston is mounted on a control bolt. The control bolt has two valve seats and two bypass systems. One seat is associated with an electromagnetic spool accommodated in the first bypass system and chokes the fluid flowing through it.