US 2012/0073920 A1Published application

Shock absorber

AssigneeHitachi Automotive Systems, Ltd.

InventorsJin Yamasaki, Shinichi Kagawa, Tetsuo Yoshida

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Abstract

A flow of hydraulic oil induced by sliding movement of a piston in a cylinder is controlled by a pilot-type main valve and a pilot valve, which is a pressure control valve, to generate a damping force. The pilot valve is adjusted in its valve-opening pressure with the thrust of a solenoid and adjusts the pressure in a back pressure chamber to control the valve-opening pressure of the main valve. A baffle plate is provided in a reservoir to isolate from each other the surface of hydraulic oil in the reservoir and an inlet port through which the hydraulic oil flows into the reservoir from a damping force generating mechanism, thereby suppressing the occurrence of aeration and cavitation. The baffle plate is secured by inserting a connecting port through a positioning opening and holding a separator tube with a pair of arm portions.

Claims13

Dependent claims

A shock absorber configured to be mounted between two relatively movable members, the shock absorber comprising:

a cylinder having a hydraulic liquid sealed therein;
a piston inserted in the cylinder;
a piston rod connected to the piston and extending to an outside of the cylinder;
an outer tube provided around an outer periphery of the cylinder;
a reservoir formed between the cylinder and the outer tube and having the hydraulic liquid and a gas sealed therein;
a connecting tube connected to an interior of the cylinder and extending toward an outside of the outer tube;
and
an inlet port provided on the outer tube to allow the hydraulic liquid to flow therethrough into the reservoir from the outside of the outer tube;
wherein a partition member is provided in the reservoir, the partition member having a partition that limits an upward flow of hydraulic liquid from the inlet port in the shock absorber with the shock absorber being mounted between the two members;
the partition member having a restraint portion restraining the partition member to a part of the connecting tube that extends toward the outside.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/246,284Filed 27 Sep 2011
Priority: JP 218961/201029 Sep 2010
Published: 29 Mar 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

F16F 9/32
Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium: details
B60G 17/08
Characteristics of dampers , e.g. mechanical dampers: characteristics of fluid dampers
F16F 9/18
Involving only straight-line movement of the effective parts: with a closed cylinder and a piston separating two or more working spaces therein
F16F 9/325
Of cylinders: for attachment of valve units

Family

US 8,899,391 B2Related patent
US 2012/0073920 A1This patent

From the US filing history. Foreign family members aren’t listed.

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