Invention Grant
- Patent Title: Electro-hydraulic system with float function
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Application No.: US14370685Application Date: 2013-01-07
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Publication No.: US09777749B2Publication Date: 2017-10-03
- Inventor: Germano Franzoni , Jarmo Harsia , Roger Lowman
- Applicant: Parker-Hannifin Corporation
- Applicant Address: US OH Cleveland
- Assignee: Parker-Hannifin Corporation
- Current Assignee: Parker-Hannifin Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- International Application: PCT/US2013/020513 WO 20130107
- International Announcement: WO2013/103954 WO 20130711
- Main IPC: F15B11/08
- IPC: F15B11/08 ; F15B11/024 ; F15B13/044

Abstract:
A method of controlling a float function of a cylinder 25 having a first side and a second side includes connecting the second side of the cylinder to a reservoir 15; connecting the first side of the cylinder to an output of a pump 20 and to the reservoir; and supplying an amount of flow from a pump less than an amount supplied by the pump under loaded conditions. A three-position directional control valve 30 having a pump port, a reservoir port, a first cylinder port, and a second cylinder port may be provided to effectuate aspects of this method.
Public/Granted literature
- US20140373519A1 ELECTRO-HYDRAULIC SYSTEM WITH FLOAT FUNCTION Public/Granted day:2014-12-25
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