Power transfer mechanism for a parking brake assembly
AssigneeAkebono Brake Industry Co., Ltd.
InventorGalus Chelaidite
Life of this patent
Estimating the term…
Abstract
A brake assembly including a first brake piston; a second brake piston; and a parking brake assembly. The parking brake assembly includes a power transfer mechanism and a motor providing power to the power transfer mechanism. During a parking brake apply, the power transfer mechanism provides the power to both the first brake piston and the second brake piston so that both the first brake piston and the second brake piston are moved until a resistance of the second brake piston becomes higher than a resistance of the first brake piston. The power transfer mechanism then transfers the power from the second brake piston to the first brake piston so that the second brake piston ceases to move and additional power is supplied to the first brake piston.
Claims20
A brake assembly comprising:
- a. a first brake piston;
- b. a second brake piston;
- and
- c. a power transfer mechanism;
- wherein during a parking brake apply or during a service brake apply, the power transfer mechanism provides power from a motor or to both the first brake piston and the second brake piston so that both the first brake piston and the second brake piston are moved until a resistance of the second brake piston becomes higher than a resistance of the first brake piston, the power transfer mechanism then transfers he power to the first brake piston so that the second brake piston ceases to move and additional power is supplied to the first brake piston, and
- wherein the power transfer mechanism comprises a first cone and a second cone that face away from each other.
A brake assembly comprising:
- a. a first brake piston;
- b. a second brake piston;
- and
- c. a power transfer mechanism;
- wherein the power transfer mechanism comprises:
- i. a first cone, the first cone is frictionally engageable with a first axle, the first axle is in communication with the first brake piston;
- and
- ii. a second cone, the second cone is frictionally engageable with a second axle, the second axle is in communication with the second brake piston;
- wherein during a brake apply, the first cone is frictionally engaged with the first axle and the second cone is fictionally engaged with the second axle so that the power transfer mechanism provides power to both the first axle and the second axle so that both the first brake piston and the second brake piston are moved until a resistance of the second brake piston becomes higher than a resistance of the first brake piston, and
- wherein when the resistance of the second brake piston becomes higher than the resistance of the first brake piston, engagement between the second axle and the second cone slips so that power ceases to be provided to the second axle and the second brake piston ceases to move while additional power is supplied to the first axle and the first brake piston so that the first brake piston continues to move.
A method of applying a service brake or a parking brake, the method comprising:
- providing power to both a first brake piston and a second brake piston so that both of the first brake piston and the second brake piston are moved, and
- transferring the power from the second brake piston to the first brake piston with a power transfer mechanism when a resistance of the second brake piston becomes higher than a resistance of the first brake piston so that the second brake piston ceases to move and additional power is supplied to the first brake piston,
- wherein the power transfer mechanism comprises a first cone and a second cone, the first cone is engageable with a first axle that is in communication with the first brake piston, and the second cone is engageable with a second axle that is in communication with the second brake piston.
Dependencies are inferred from the claim text.