Patent · US Active

System for supplying hydraulic fluid

US8151818B2 · kind B2 · utility

2Cited by

6References

14Claims

0Family size

Assignee

Deere & Company · US

Inventors

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

Key dates

Filing date	Sep 1, 2009
Grant date	Apr 10, 2012
Priority date	—
Expiry date	Oct 9, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86348
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The invention concerns a system for supplying hydraulic fluid to a hydraulic system, with an operating reservoir that accepts the hydraulic fluid provided for the operation of the hydraulic system and an auxiliary reservoir connected to the operating reservoir over a hydraulic line for intermediate storage of hydraulic fluid withdrawn from the operating reservoir. According to the invention, an air pump is available that is connected on the one hand on its low pressure side to a suction line that ends in a fluid free area of the auxiliary reservoir, so that a negative pressure can be built up in the auxiliary reservoir as against the external atmospheric pressure, and that is connected, on the other hand, to a control line that is provided with a control opening that is covered by the hydraulic fluid in the operating reservoir at least before the air pump is put into operation.

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