US 2024/0191728 A1 · Hydraulic Pump

Abstract

A hydraulic pump is provided including a housing with a work port, a bladder that stores hydraulic fluid, a pump assembly, and a manifold. The pump assembly pumps hydraulic fluid from the bladder to the work port via an outlet line. The manifold includes a first chamber, a first relief valve, a second chamber located between the first chamber and the work port, a second relief valve, and a check valve. The first relief valve releases fluid from the outlet line to the bladder when a first pressure is reached within the first chamber. The second relief valve releases fluid from the outlet line to the bladder when a second pressure is reached within the second chamber. The check valve is positioned along the outlet line between the first chamber and the second chamber and prevents fluid flow from the second chamber to the first chamber.

Claims20

Dependent claims

A hydraulic pump comprising:

a housing including a work port;
a bladder that stores hydraulic fluid;
a pump assembly that pumps hydraulic fluid from the bladder to the work port via an outlet line;
and
a manifold containing a portion of the outlet line, the manifold comprising:
a first chamber,
a first relief valve connected to the first chamber, the first relief valve releasing fluid from the outlet line to the bladder when a first pressure is reached within the first chamber,
a second chamber located between the first chamber and the work port,
a second relief valve connected to the second chamber, the second relief valve releasing fluid from the outlet line to the bladder when a second pressure is reached within the second chamber, and
a check valve positioned along the outlet line between the first chamber and the second chamber, the check valve preventing fluid flow from the second chamber to the first chamber.

7 more elements

Dependencies are inferred from the claim text.

Hydraulic Pump

Life of this patent

Hydraulic Pump

Life of this patent

Abstract

Claims20