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LEDUC & FILS RENE

Overview
  • Total Patents
    25
About

LEDUC & FILS RENE has a total of 25 patent applications. Its first patent ever was published in 1965. It filed its patents most often in France, Germany and EPO (European Patent Office). Its main competitors in its focus markets engines, pumps and turbines, mechanical elements and transport are Jiangsu hengjiu machinery co ltd, IMAMURA YUUZOU and JIANGSU WANCHUAN HYDRAULIC MACHINERY EQUIPMENT CO LTD.

Patent filings in countries

World map showing LEDUC & FILS RENEs patent filings in countries
# Country Total Patents
#1 France 19
#2 Germany 3
#3 EPO (European Patent Office) 1
#4 Japan 1
#5 United States 1

Patent filings per year

Chart showing LEDUC & FILS RENEs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Porel Louis-Claude 7
#2 Rui Kuroodo Poreru 1
#3 Porel Louis Claude 1
#4 Galopin Andre 1
#5 Leduc Gerard 1

Latest patents

Publication Filing date Title
FR2480865A1 Integrated hydraulic power unit - includes coaxial electric motor and pump with outer cylindrical casing housing fluid reservoir
FR2468013A1 Two part oleo-pneumatic bladder accumulator - has parts welded together with end of membrane included inside circumferential weld
FR2453751A2 Control of tipping hopper safety device - is fluid pressure distributor has four positions permitting selective communication between pump, tank, pilot hole and control holes
FR2449210A1 Two stage delivery valve for hydraulic pump - has two coaxial valves held by strong and weak springs respectively
FR2436030A1 Hydropneumatic suspension for vehicle - has multiple accumulators, all but one with pressure isolating valve acting at different pressures
DE2837639A1 SWASHPLATE PUMP
DE2825473A1 SWASHPLATE PUMP WITH TWO DIRECTIONS
FR2414130A1 Double acting hydraulic jack - has built-in pressure relief with spring-loaded piston which uncovers transfer ports
FR2393951A1 Swashplate pump with pistons sprung against slide shoe - has symmetrical inlet port to allow operation in either direction of rotation
US4004863A Hydraulic pump with remote control equipment
FR2254241A5 Seal for rotating and laterally vibrating shafts - additional flexible seal surrounds needle roller outer race