Hydraulic actuator sealing device
AssigneeNok Corporation
InventorsDaiki KAMO, Kiichiro GOTO
Life of this patent
Estimating the term…
Abstract
A hydraulic actuator sealing device includes an annular piston, an annular cancel plate, a return spring, and an annular piston spring seat. The annular piston includes an annular pressure receiving plate portion receiving a load of the return spring, an inner cylinder portion extending from an inner peripheral side of the annular pressure receiving plate portion toward the annular cancel plate, and a bent portion connecting the annular pressure receiving plate portion with the inner cylinder portion and expanding with respect to the annular pressure receiving plate portion in a direction away from the return spring in an axial direction.
Claims4
A hydraulic actuator sealing device comprising:
- an annular cylinder;
- an annular piston disposed reciprocally in an axial direction in the annular cylinder;
- an annular cancel plate fixed to the annular cylinder;
- a return spring interposed between the annular piston and the annular cancel plate;
- and
- an annular piston spring seat interposed between the return spring and the annular piston;
- wherein the hydraulic actuator sealing device has:
- a pressure chamber formed between the annular cylinder and the annular piston and allowing hydraulic pressure to be applied to the pressure chamber;
- and
- an equilibrium oil chamber formed between the annular cancel plate and the annular piston;
- and
- wherein the annular piston comprises:
- an annular pressure receiving plate portion receiving a load of the return spring;
- an inner cylinder portion extending from an inner peripheral side of the annular pressure receiving plate portion toward the annular cancel plate;
- and
- a bent portion connecting the annular pressure receiving plate portion with the inner cylinder portion and expanding with respect to the annular pressure receiving plate portion in a direction away from the return spring in the axial direction.
Dependencies are inferred from the claim text.