Invention Grant
- Patent Title: Hydraulic drive with an independent charge pump
- Patent Title (中): 带独立电荷泵的液压驱动
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Application No.: US12615412Application Date: 2009-11-10
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Publication No.: US08443596B2Publication Date: 2013-05-21
- Inventor: Frank Ramm
- Applicant: Frank Ramm
- Applicant Address: US IA Ames
- Assignee: Sauer Danfoss Inc.
- Current Assignee: Sauer Danfoss Inc.
- Current Assignee Address: US IA Ames
- Agency: Zarley Law Firm, P.L.C.
- Priority: DE102009021866 20090519
- Main IPC: F16D31/02
- IPC: F16D31/02

Abstract:
The invention relates to a hydraulic drive (2) having a main pump (8), which can be adjusted in terms of delivery volume and delivery direction, and having a hydraulic motor (9), which main pump (8) and hydraulic motor (9) are connected to one another in a closed circuit via pressure lines (10A, 10B), and having a charge pump (14, 15) for charging into the closed circuit and for supplying pressurized fluid to at least one controlling device (11, 12), wherein the charge pump (15) has a separate drive motor (19) whose power/rotational speed can be specified independently of the rotational speed of the drive (3) of the main pump (8). In this way, the charge pump (15) can be of smaller dimensions than previously conventional, and the power balance of the hydraulic drive can be improved.
Public/Granted literature
- US20100293937A1 HYDRAULIC DRIVE WITH AN INDEPENDENT CHARGE PUMP Public/Granted day:2010-11-25
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