Inventor
LIBERFARB ZILEK
US11 patents
⚠️ This page may combine multiple inventors who share the name “LIBERFARB ZILEK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HYDRAFORCE INC
5 patentsUS7063100B2Jun 20, 2006
Flow regulator with pressure relief combination valve
HYDRAFORCE INC45 citations92
US6966329B2Nov 22, 2005
Proportional pilot-operated flow control valve
HYDRAFORCE INC54 citations92
US6167906B1Jan 2, 2001
Bi-directional flow control valve
HYDRAFORCE INC25 citations92
US6116263ASep 12, 2000
Proportional priority flow regulator with reverse flow control
HYDRAFORCE INC19 citations83
US7261030B2Aug 28, 2007
Method and system for improving stability of hydraulic systems with load sense
HYDRAFORCE INC16 citations75
PARKER HANNIFIN CORP
4 patentsUS6286535B1Sep 11, 2001
Proportional pressure control valve
PARKER HANNIFIN CORP45 citations95
US6571828B2Jun 3, 2003
Proportional pressure control valve
PARKER HANNIFIN CORP25 citations92
US6405746B2Jun 18, 2002
Proportional pressure control valve
PARKER HANNIFIN CORP11 citations73
US6926033B2Aug 9, 2005
Proportional pressure control valve
PARKER HANNIFIN CORP3 citations62