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US 11,964,530 B2Granted
Integrated multiple actuator electro-hydraulic units
AssigneeClearMotion, Inc.
InventorsJoseph Thomas Belter, Clive Tucker, Marco Giovanardi, Jack A. Ekchian, Zackary Martin Anderson, John A. Laplante
Life of this patent
Estimating the term…
Abstract
Integrated multiple actuator electro-hydraulic systems as well as their methods of use are described. Depending on the particular application, the integrated electro-hydraulic systems may exhibit different frequency responses and/or may be integrated into a single combined unit.
Claims20
An integrated motion control unit, comprising:
- a first actuator that includes a housing with an internal volume separated into a compression volume and an extension volume by a double-acting piston and a piston rod attached to the double-acting piston;
- a reversible hydraulic pump that has a first port that is in continuous fluid communication with the extension volume, and a second port that is in continuous fluid communication with the compression volume;
- a first pressurized accumulator in fluid communication with the compression volume or the extension volume;
- and
- a second actuator with a single-acting annular piston that extends radially and surrounds the housing of the first actuator along at least a portion of the axial length of the housing of the first actuator, wherein a volume of hydraulic fluid within the second actuator is separate from the internal volume of the first actuator.
2 more elements
An active motion control unit, comprising:
- a first actuator with an internal volume and a first piston that is slidably received in the internal volume and travels along a first axis, wherein the first actuator is interposed between a first structure and a second structure;
- a second actuator with an internal volume containing hydraulic fluid and a second piston with a second axis of travel, wherein a pressure of the hydraulic fluid induces a force on the second piston along the second axis of travel, wherein the second actuator is operatively connected to a spring element to form an assembly, wherein the assembly is operatively interposed between the first structure and the second structure;
- a pressurized accumulator;
- a hydraulic pump with a first port and a second port, wherein at least the first port is in fluid communication with the internal volume of the first actuator and the internal volume of the second actuator, and wherein the second port is in fluid communication with the pressurized accumulator;
- and
- a low pass hydraulic filter that regulates fluid flow between the first port and the internal volume in the second actuator, wherein a response frequency of the second actuator is determined, at least in part, by the low pass filter.
3 more elements
Dependencies are inferred from the claim text.