Patent · US Active

Hydraulic circuit supply system

US9599127B2 · kind B2 · utility

1Cited by

8References

15Claims

0Family size

Assignee

Deere & Company · US

Inventors

Scott R. Wiens · Mannheim, DE
Marcus Bitter · Mannheim, DE
Christian Brueser · Speyer, DE
Harm-Hendrik Lange · Bockenem, DE
Helmut Schaefer · Pirmasens, DE

Key dates

Filing date	Jan 21, 2014
Grant date	Mar 21, 2017
Priority date	—
Expiry date	Jan 21, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86348
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to an system for supplying a hydraulic circuit with hydraulic fluid. The system includes a working reservoir and an auxiliary reservoir connected to the working reservoir by a hydraulic line. An air pump has an inlet connected to a suction line that opens into a liquid-free portion of the auxiliary reservoir so that a negative pressure can be built up in the auxiliary reservoir relative to the atmospheric ambient pressure. The air pump inlet is also connected to a control line, which comprises a control opening which is covered by the hydraulic fluid in the working reservoir, at least before the air pump is started up.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.