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Hydraulic shock absorber with adjusting of shock absorbing type

Image Number 4 for United States Patent #7055661.

A shock absorber (1) includes a compression chamber (2) in which a piston (3) moves along a path of travel from a near end to a far end. The chamber includes a constant force mode bleed orifice (10) adjacent the far end and a series of progressive force bleed orifices (9a 9e) at spaced intervals between the near and far ends. An adjustment cylinder (12) has sloping arcuate apertures (13a 13e). As the cylinder (12) is rotated, one of the arcuate apertures aligns with the constant force orifice or the apertures align with the progressive force orifices in full or in part.

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