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US 2019/0168720 A1Published application
Manually-operable hydraulic stabilizing system
AssigneeLippert Components, Inc.
InventorsMark Kinder, Robert L. Tiedge, Nicholas Cornett
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Abstract
A stabilizing system includes a plurality of jacks, each operated by a corresponding hydraulic actuator. A hydraulic fluid transfer pump provides supplies hydraulic fluid to and receives hydraulic fluid from one or more pressure chambers of the actuator. A pilot-operated check or directional valve may be provided in fluid communication with one or more of the pressure chambers and configured to regulate the flow of hydraulic fluid to and from the pressure chamber.
Claims17
A hydraulic stabilizing system comprising:
- a plurality of hydraulic stabilizing jacks, each of said jacks having an actuator comprising:
- an actuator cylinder;
- an actuator piston slidingly engaged with said actuator cylinder, said actuator piston cooperating with said actuator cylinder to define an actuator extend chamber and an actuator retract chamber;
- an actuator piston rod connected to said actuator piston and selectively extendable from and retractable into said jack cylinder;
- and
- one of a pilot-operated check valve and a pilot-operated directional valve having a first flow port connected to one of said actuator retract chamber and said actuator extend chamber in fluid communication therewith;
- a fluid reservoir;
- a fluid transfer pump having an input in fluid communication with said fluid reservoir, wherein said fluid transfer pump is one of a reciprocating pump and a gear pump;
- a hydraulic line connecting an output of said pump with said one of said actuator retract chamber and said actuator extend chamber of at least one of said actuators and with a second flow port of said one of pilot-operated check valve and a pilot-operated directional valve of said at least one of said actuators;
- and
- a control valve operable to selectively establish fluid communication between said first hydraulic line and said fluid reservoir.
8 more elements
Dependencies are inferred from the claim text.