Abstract: A seal for hydraulically sealing a piston rod that travels axially into and out of a housing, preferably in a hydraulic dashpot. The seal comprises a preferably resilient-plastic sealing component (5). The sealing component is provided with one or more sharp ridges (10, 11, & 12) that rest against the piston rod, is tensioned across an elastomeric component (8), and is radially and axially secured along with the latter in a seal holder (2). The sealing component has an axial cylindrical wall (6) and a radial annular flange (7). The wall rests snug against the piston rod. The elastomeric component is annular and is provided with an inner surface (9) that tapers in toward the center of the housing and that the wall rests against. The outer surface of the elastomeric component is accommodated subject to radial tension in a setback (13) in the seal holder.

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: An assembly for sealing and centering a piston rod (3) at its point of penetration in a two-cylinder dashpot or two-cylinder telescoping leg. The assembly seals and centers it as the piston rod travels into and out of the dashpot. The assembly is provided with at least one seal (13) outside the dashpot, toward the inside with at least one piston-rod sealing ring (7), and with at least one channel between them. The channel extends into a gas accommodating space (19) left between the dashpot's outer cylinder (1) and its inner cylinder (2). The gas channel is provided with a checkvalve. One object is components that eliminate the need for a high-pressure sealing ring in contact with the piston rod. Another object is a simpler checkvalve in the overflow channel. The gas channel upstream of the gas-accommodating space is provided with a flow-controlling diaphragm (22).

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 piston rod that travels back and forth into and out of a cylinder (4), which it is sealed off from and aligned with by a sheet-metal subassembly. The sealing-and alignment assembly consists of a support with a collar that can accommodate a piston-rod centering sleeve (5) and of a seal (6) reinforced by a sheet-metal disc and whereby the support and/or the disc (7) are in one or more components. To further simplify the sealing-and-alignment assembly and to simplify the assembly's structure not only as such but in conjunction with the dashpot, at least one component of the support (1) is form fit or substance fit to at least one component of the sheet-metal disc 7.

Abstract: A seal for hydraulically sealing a piston rod that travels axially into and out of a housing, preferably in a hydraulic dashpot. The seal comprises a preferably resilient-plastic sealing component (5). The sealing component is provided with one or more sharp ridges (10, 11, & 12) that rest against the piston rod, is tensioned across an elastomeric component (8), and is radially and axially secured along with the latter in a seal holder (2). The sealing component has an axial cylindrical wall (6) and a radial annular flange (7). The wall rests snug against the piston rod. The elastomeric component is annular and is provided with an inner surface (9) that tapers in toward the center of the housing and that the wall rests against. The outer surface of the elastomeric component is accommodated subject to radial tension in a setback (13) in the seal holder.

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 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 stopper for a hydraulic dashpot for a motor vehicle. The dashpot essentially comprises a piston and cylinder. The cylinder is occupied by fluid and is divided into two chambers by a piston. The piston is mounted on the end of a rod that travels into and out of the cylinder. The stopper is mounted at the end of the cylinder the piston rod travels in and out of. The stopper accommodates seals and several annular components, and at least one of the annular components is attached to the wall of the cylinder. The stopper has an annular component in the shape of a cup at the piston-rod entry-and-exit end. The base of the cup-shaped annular component extends radially inward and has a circular hole at the center. The piston rod extends through the hole. The side of the cup-shaped annular component extends toward the interior of the cylinder. The cup-shaped annular component also accommodates an annular piston-rod aligning component that is at least partly surrounded by the cup-shaped annular component.

Abstract: A hydraulic dashpot for motor vehicles. It essentially comprises a fluid-filled shock-absorbing cylinder alone or accommodated in an outer cylinder and a piston that travels back and forth inside the shock-absorbing cylinder on the end of a piston rod. The piston rod extends through a centering component at one end of the shock-absorbing cylinder or of both cylinders and the edge of the shock-absorbing cylinder or of the outer cylinder is crimped around the centering component. The object is to improve support of the pressure-impact accommodator. The crimping (4) creates a neck (5) at that end of the shock-absorbing cylinder (1) that the impact-absorbing cap (6) rests against.

Abstract: A hydropneumatic shock absorber comprises an outer tube centered on an upright axis, an inner tube coaxially spaced inside the outer tube and forming therewith an outer gas/liquid chamber, a piston rod inside the inner tube, generally coaxial with the tubes, and forming with the inner tube an inner liquid chamber, and a piston carried on the rod and radially outwardly engaging the inner tube, whereby axial displacement of the piston and rod relative to the tubes in one direction pressurizes the inner chamber. A foot valve between the inner and outer chambers permits limited liquid flow therebetween. An annular plug is fixed at the upper axial ends of the tubes and axially upwardly blocks the inner and outer chambers. A guide bushing in the plug surrounds the piston rod and an annular outer seal in the plug surrounds the piston rod above the bushing and forms with the bushing and plug an annular compartment surrounding the rod.

Abstract: A load-carrying, shock absorbing strut is provided comprising an outer tube for carrying a wheel axle journal. There is slidably accommodated in the tube a shock absorber cylinder which is connected with the chassis frame. A downwardly emerging piston rod of the cylinder is fastened to the bottom of the outer tube. Between the shock absorber cylinder and the outer tube there is provided a lubricant annular chamber of constant volume which is closed off above and below by upper and lower guide and sealing rings arranged on the outer tube. A sealing ring is arranged above each guide ring with axially limited play and comprise lubricant-sealing felt rings. To effect good dirt-deflecting action there is present above the upper sealing ring a dirt-deflecting ring which has the dual function of limiting the sealing ring axial play as well as removing dirt from the shock absorber cylinder.