Inventor
FLETCHER DAVID E
US62 patents
⚠️ This page may combine multiple inventors who share the name “FLETCHER DAVID E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FLETCHER DAVID E
25 patentsUSD821302SJun 26, 2018
Venturi device
FLETCHER DAVID E14 citations92
USD780296SFeb 28, 2017
Actuated valve
FLETCHER DAVID E8 citations92
USD821546SJun 26, 2018
Actuated valve
FLETCHER DAVID E3 citations84
USD802095SNov 7, 2017
Actuated valve
FLETCHER DAVID E5 citations84
US9599234B1Mar 21, 2017
Sprung gate valve
FLETCHER DAVID E14 citations84
US9599246B2Mar 21, 2017
Magnetically actuated shut-off valve
FLETCHER DAVID E8 citations84
US10273978B2Apr 30, 2019
Low-cost evacuator for an engine having tuned Venturi gaps
FLETCHER DAVID E7 citations83
US10626888B2Apr 21, 2020
Dual Venturi device
FLETCHER DAVID E2 citations73
US10519984B2Dec 31, 2019
Noise attenuation in a Venturi device and/or check valves
FLETCHER DAVID E2 citations73
US10513954B2Dec 24, 2019
Restrictors using the Venturi effect
FLETCHER DAVID E2 citations73
US10443627B2Oct 15, 2019
Vacuum producing device having a suction passageway and a discharge passageway entering through the same wall
FLETCHER DAVID E3 citations73
US10422351B2Sep 24, 2019
Devices for producing vacuum using the venturi effect having a plurality of subpassageways and motive exits in the motive section
FLETCHER DAVID E3 citations73
US10316864B2Jun 11, 2019
Devices for producing vacuum using the venturi effect
FLETCHER DAVID E3 citations73
US10239187B2Mar 26, 2019
Methods for post-mold processing a Venturi device or check valve
FLETCHER DAVID E3 citations73
US10167971B2Jan 1, 2019
Aspirated relief valve for a turbocharging system
FLETCHER DAVID E2 citations73
US10100720B2Oct 16, 2018
Crankcase ventilating evacuator
FLETCHER DAVID E3 citations73
US9919689B2Mar 20, 2018
Bypass valve in an apparatus for producing vacuum
FLETCHER DAVID E6 citations73
US9879699B2Jan 30, 2018
Venturi devices with dual Venturi flow paths
FLETCHER DAVID E2 citations73
US9841110B2Dec 12, 2017
Sprung gate valves movable by a solenoid actuator
FLETCHER DAVID E6 citations73
US9732871B2Aug 15, 2017
Aspirated relief valve for a turbocharging system
FLETCHER DAVID E4 citations73
USD796006SAug 29, 2017
Actuated valve
FLETCHER DAVID E1 citations62
US10107240B2Oct 23, 2018
Check valves and Venturi devices having the same
FLETCHER DAVID E1 citations52
US9915370B2Mar 13, 2018
Magnetically actuated shut-off valve
FLETCHER DAVID E0 citations52
US9863537B2Jan 9, 2018
Check valve with improved sealing member
FLETCHER DAVID E0 citations52
USD796634SSep 5, 2017
Actuated valve
FLETCHER DAVID E0 citations52
DAYCO IP HOLDINGS LLC
16 patentsUS9574677B2Feb 21, 2017
Solenoid-powered gate valve
DAYCO IP HOLDINGS LLC10 citations84
USD843315SMar 19, 2019
Venturi device
DAYCO IP HOLDINGS LLC4 citations83
USD840920SFeb 19, 2019
Venturi device
DAYCO IP HOLDINGS LLC4 citations83
USD840923SFeb 19, 2019
Venturi device
DAYCO IP HOLDINGS LLC3 citations83
USD840922SFeb 19, 2019
Venturi device
DAYCO IP HOLDINGS LLC5 citations83
US10724550B2Jul 28, 2020
Venturi devices with dual Venturi flow paths
DAYCO IP HOLDINGS LLC3 citations73
USD844550SApr 2, 2019
Venturi device
DAYCO IP HOLDINGS LLC1 citations72
USD840921SFeb 19, 2019
Venturi device
DAYCO IP HOLDINGS LLC1 citations72
US11378211B2Jul 5, 2022
Quick connector with a replaceable restriction orifice
DAYCO IP HOLDINGS LLC2 citations71
US11015498B2May 25, 2021
Crankcase ventilation system with a flow control device for on board diagnostics
DAYCO IP HOLDINGS LLC4 citations70
US11067177B2Jul 20, 2021
Sprung gate valves movable by an actuator
DAYCO IP HOLDINGS LLC0 citations62
US11668423B2Jun 6, 2023
Quick connector with a replaceable restriction orifice
DAYCO IP HOLDINGS LLC0 citations60
US11492936B2Nov 8, 2022
Crankcase ventilation system with constant restriction in the flow direction and free flow in an opposite direction
DAYCO IP HOLDINGS LLC0 citations59
US10525952B2Jan 7, 2020
Aspirators for producing vacuum using the venturi effect
DAYCO IP HOLDINGS LLC0 citations52
US10323767B2Jun 18, 2019
Sprung gate valves movable by an actuator
DAYCO IP HOLDINGS LLC0 citations52
US10190549B2Jan 29, 2019
Check valves and venturi devices having the same
DAYCO IP HOLDINGS LLC0 citations52
HAMPTON KEITH
3 patentsUS9915362B2Mar 13, 2018
Fluidic diode check valve
HAMPTON KEITH12 citations84
US9534704B2Jan 3, 2017
Noise attenuation in a check valve unit or apparatus for producing vacuum
HAMPTON KEITH13 citations83
US10571030B2Feb 25, 2020
Valve gate within a Venturi gap of a Venturi device for producing vacuum
HAMPTON KEITH5 citations73
GRAICHEN BRIAN M
3 patentsDAYCO PRODUCTS INC
3 patentsUS5391118AFeb 21, 1995
Belt tensioner, actuator therefor and methods of making the same
DAYCO PRODUCTS INC6 citations71
US5571061ANov 5, 1996
Belt tensioner, actuator and method of making
DAYCO PRODUCTS INC3 citations60
US5499950AMar 19, 1996
Belt tensioner, actuator therefor and methods of making the same
DAYCO PRODUCTS INC2 citations60
Showing the top 50 of 62 patents by PatentIndex Score.