Hydraulic shock absorber
AssigneeKayaba Industry Co., Ltd.
InventorTsutomu Yoshimoto
Life of this patent
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Abstract
In a hydraulic shock absorber, a first oil chamber (R1) around the piston rod (2) and a second oil chamber (R2) on the opposite side are separated by a piston (3). A communicating passage (L) is disposed on the outside of the cylinder (1) to connect the first oil chamber (R1) and the second oil chamber (R2). An elongation damping valve (4) is installed in the communicating passage (L). When the piston (3) performs an elongation stroke, the entire amount of working oil that has flowed out from the first oil chamber (R1) is supplied to the second oil chamber (R2) via the elongation damping valve (4). As a result, the second oil chamber (R2) does not suffer a shortage of working oil and when the piston (3) shifts to the contraction stroke, a response in generation of damping force can be improved.
Claims7
A hydraulic shock absorber comprising:
- a cylinder;
- a piston accommodated in the cylinder;
- a piston rod connected to an end of the piston and protruding axially from the cylinder;
- a first oil chamber separated by the piston around the piston rod within the cylinder;
- a second oil chamber separated by the piston on the opposite side of the piston to the piston rod;
- a communicating passage disposed on the outside of the cylinder to connect the first oil chamber and the second oil chamber;
- and
- an elongation damping valve installed in the communicating passage to allow a working oil to flow from the first oil chamber to the second oil chamber under a predetermined damping force while preventing the working oil from flowing in the opposite direction.
Dependencies are inferred from the claim text.