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US 5,178,243 AGranted
Hydraulic damper
AssigneeAtsugi Unisia Corporation
InventorsMasahiko Hamada, Seiji Iwasawa, Seiji Miyazawa
Life of this patent
Estimating the term…
Abstract
According to a hydraulic damper disclosed in the specification, a piston rod guide arrangement comprises a bushing in contact with a piston rod and a bushing retainer formed by pressing a sheet of metal to have an outer sleeve portion and an inner sleeve portion. An insert formed by pressing a sheet of metal is coupled with a cylinder. The retainer is coupled with the insert with the inner sleeve portion disposed between the insert the bushing.
Claims13
A hydraulic damper comprising:
- an outer shell;
- a cylinder, having an axial end, disposed in said outer shell;
- a piston rod disposed in said cylinder;
- a bushing in contact with said piston rod;
- an insert coupled with and inserted into said cylinder;
- a retainer having an outer sleeve portion including an outer peripheral wall in engagement with said outer shell and an inner sleeve portion inserted into said cylinder and disposed between said bushing and said insert, said inner sleeve portion including an inner peripheral wall supporting said bushing;
- one of said inner sleeve portion and said insert having a protruded portion which is so constructed and arranged between said bushing and said cylinder as to increase radial support rigidity of said bushing.
4 more elements
A hydraulic damper comprising:
- an outer shell;
- a cylinder, having an axial end, disposed in said outer shell;
- a piston rod disposed in said cylinder;
- a bushing in contact with said piston rod;
- an insert formed by pressing a sheet of metal and having a reduced diameter portion disposed in said cylinder;
- a retainer formed by pressing a sheet of metal and having an outer sleeve portion including an outer peripheral wall in engagement with said outer shell and an inner sleeve portion inserted into said cylinder and disposed between said bushing and said insert, said inner sleeve portion including an inner peripheral wall supporting said bushing;
- said reduced diameter portion of said insert having a protruded portion bearing against said inner sleeve portion of said retainer, whereby a radial support rigidity of said bushing is increased.
4 more elements
Dependencies are inferred from the claim text.