Back to results
US 4,375,843 AGranted
Piston-cylinder assembly for a vibration damper unit having an essentially tubular container
AssigneeFichtel & Sachs AG
InventorsHermann Itzinger, Manfred Koller, Erich Jager, Werner Christel
Life of this patent
Estimating the term…
Abstract
A piston-cylinder unit for shock absorbers or the like is formed with a tubular container surrounding the cylinder and with a piston rod guide and sealing unit mounted at one end of the container with a support for the cylinder at the other end of the container. In order to effect a satisfactory sealing action at the fixing points of the cylinder, the cylinder is formed with a radial indentation.
Claims18
A piston-cylinder unit, particularly useful for shock absorbers and telescopic struts, comprising
- (a) an essentially tubular container with a first axial end region and a second axial end region;
- (b) a cylinder arranged within said container, with a first axial end region facing toward said first axial end region of said container, and a second axial end region facing said second axial end region of said container;
- (c) support means on said container at said first axial end region thereof for axial support of said first axial end region of said cylinder;
- (d) a piston rod guide and sealing unit arranged at least in part within said second axial end region of said container and supported in the axial direction on said second axial end region of said cylinder;
- (e) a deformation in said second axial end region of said container by means of which said piston rod guide and sealing unit is fixed in the axial direction relative to said container, so that said cylinder is fixed axially immovably between said support means and said piston rod guide and sealing unit;
- (f) a piston rod inserted into said cylinder through said piston rod guide and sealing unit;
- (g) a piston connected to said piston rod within said cylinder;
- and
- (h) at least one circumferential indentation in said container between said support means and said deformation which is made after said deformation has been made.
6 more elements
A method for producing a piston-cylinder unit which is structured to include:
- (a) an essentially tubular container with a first axial end region and a second axial end region;
- (b) a cylinder arranged within said container with a first axial end region of said cylinder facing toward said first axial end region of said container, and a second axial end region of said cylinder facing said second axial end region of said container;
- (c) support means of said container at said first axial end region thereof for axial support of said first axial end region of said cylinder;
- (d) a piston rod guide and sealing unit arranged at least in part within said second axial end region of said container and supported in the axial direction on said second axial end region of said cylinder;
- (e) a deformation in said second axial end region of said container by means of which said piston rod guide and sealing unit is fixed in the axial direction relative to said container so that said cylinder is fixed axially immovably between said support means and said piston rod guide and sealing unit;
- (f) a piston rod inserted into said cylinder through said piston rod guide and sealing unit;
- and
- (g) a piston connected to said piston rod within said cylinder;
- said method comprising the steps of inserting said cylinder into said container until said first end region of said cylinder is almost against said support means whereupon said piston rod guide and sealing unit is inserted to said second end region of said container until it bears almost against said second end region of said cylinder, subsequently forming said deformation, to affix said piston rod guide and sealing unit to said container and forming an indentation in said container between said first and second axial end regions thereof, said indentation being made after said deformation has been formed.
6 more elements
Dependencies are inferred from the claim text.