Invention Grant
- Patent Title: Pilot-operated directional control valve
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Application No.: US15520107Application Date: 2015-10-14
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Publication No.: US10400912B2Publication Date: 2019-09-03
- Inventor: Frank Schulz , Markus Bill
- Applicant: HYDAC FLUIDTECHNIK GMBH
- Applicant Address: DE Sulzbach/Saar
- Assignee: HYDAC FLUIDTECHNIK GMBH
- Current Assignee: HYDAC FLUIDTECHNIK GMBH
- Current Assignee Address: DE Sulzbach/Saar
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: DE102014015704 20141022
- International Application: PCT/EP2015/002027 WO 20151014
- International Announcement: WO2016/062383 WO 20160428
- Main IPC: F16K31/40
- IPC: F16K31/40

Abstract:
A pilot-controlled directional control valve, in particular a directional poppet valve, has a valve housing (10), at least three fluid connection points (12, 14, 16), a main control stage (18) and a pilot control stage. A further fluid-controlling intermediate stage (22) is arranged between the main control stage (18) and the pilot control stage (20). The main control stage (18) has a longitudinally movable main control piston (24). The pilot control stage has a longitudinally movable pilot control piston (26).
Public/Granted literature
- US20170321820A1 PILOT-OPERATED DIRECTIONAL CONTROL VALVE Public/Granted day:2017-11-09
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