US20220196154A1 - Butterfly valve with vibration resistant mount - Google Patents
Butterfly valve with vibration resistant mount Download PDFInfo
- Publication number
- US20220196154A1 US20220196154A1 US17/689,323 US202217689323A US2022196154A1 US 20220196154 A1 US20220196154 A1 US 20220196154A1 US 202217689323 A US202217689323 A US 202217689323A US 2022196154 A1 US2022196154 A1 US 2022196154A1
- Authority
- US
- United States
- Prior art keywords
- roller pin
- crank
- piston
- set forth
- collars
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910001026 inconel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
- F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
- F16K31/1635—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston for rotating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/045—Pivotal connections with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
- F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
- F16K31/5282—Mechanical actuating means with crank, eccentric, or cam with pin and slot comprising a pivoted disc or flap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/91—Valves
Definitions
- This application relates to a vibration resistant mount for roller pin bearings on a butterfly valve.
- Butterfly valves are known, and utilized in any number of applications.
- a butterfly valve includes a valve member which pivots within a fluid passage to control the amount of opening of the fluid passage.
- An actuator piston drives a roller pin, and the roller pin drives a crank shaft to in turn rotate a valve shaft to cause the valve member to pivot within the fluid passage, and control the amount of fluid passing through the passage.
- the roller pin is mounted on bearings such that crank collars of the crank shaft may rotate about the roller pin.
- butterfly valve is in an anti-ice system for a gas turbine engine.
- relatively hot air is selectively directed to areas that might experience icing to melt the ice.
- a butterfly valve includes a valve member mounted on a shaft to pivot within a fluid passage.
- An actuator includes a piston having opposed piston heads associated with fluid chambers.
- a control selectively moves the piston in a linear direction to control a position of the valve member in the fluid passage.
- the piston causes a roller pin to move as the piston moves linearly.
- the roller pin is mounted in crank collars of a crank shaft such that movement of the roller pin causes the crank collars to rotate a crank shaft rotating position, and the valve shaft.
- the roller pin is mounted within the crank collars by bearings.
- the bearings each have an outer race associated with one of the crank collars, an inner race associated with the roller pin, and bearing members separate the inner and outer race. There is a spring bias resisting movement of the inner races relative to said roller pin.
- a gas turbine engine anti-ice system is also disclosed.
- FIG. 1 shows an anti-ice system schematically.
- FIG. 2 is a cross sectional view through a butterfly valve actuator as shown along line 2 - 2 of FIG. 1 .
- FIG. 3 is a top cutaway view of the actuator of FIG. 2 .
- FIG. 4 shows a detail of a crankshaft and roller pin arrangement.
- An anti-ice system 20 controls the flow of hot air from a source 22 , such as a gas turbine engine compressor, to a destination 24 .
- the destination 24 may be an area on an associated aircraft that needs deicing.
- a butterfly valve 25 is shown controlling the amount of airflow from the source 22 to the destination 24 .
- Butterfly valve 25 may be mounted directly on a gas turbine engine 26 , shown schematically. With such a mount, the butterfly valve 25 will experience vibration during operation.
- the butterfly valve 25 includes a valve member 28 that pivots within a fluid passage 30 to control the amount of airflow.
- An actuator 32 controls the position of the valve member 28 .
- a control 33 supplies fluid to opposed chambers (see FIG. 2 ) to move a piston, and control the position of members.
- FIG. 2 is a cross-sectional view along line 2 - 2 as shown in FIG. 1 .
- the actuator 32 includes a piston having piston heads 50 and 52 associated with fluid chambers 54 and 56 .
- a piston connecting portion 51 connects piston heads 50 and 52 .
- Fluid is selectively delivered by control 33 into the chambers 54 and 56 to move the piston to a desired position to in turn control the position of the valve member 28 .
- a valve shaft 42 is driven to rotate to cause a valve shaft extension 40 to move the valve member 28 .
- a roller pin 48 drives crank collars 44 and 46 of a crank shaft 70 to cause the valve shaft 42 to rotate.
- FIG. 3 shows detail with a piston connecting member 51 and roller pin 48 .
- roller pin 48 moves within a slot 61 to cause the crank shaft 70 to rotate and rotate the valve shaft 42 .
- the roller pin 48 will slide within the slot 61 , and cause the crank shaft 70 to rotate.
- FIG. 4 shows details of the crankshaft 70 having a bore 71 in a rotating portion 75 receiving the valve shaft 42 .
- Crank collars 44 and 46 extend from the rotating portion 75 of the crankshaft 70 .
- the crank collars 44 and 46 surround the roller pin 48 .
- the roller pin 48 receives a retention bolt 60 having a head 62 and a retention nut 66 at a remote end 64 of the bolt 60 .
- Bolt 60 extends through a bore 81 in roller pin 48 .
- Torque between the bolt and nut provides the primary method of securing the bolt to the nut. Secondary retention is obtained via a locking helical coil insert 68 .
- a tack weld 100 secures the bolt end 64 to the retention nut 66 as a tertiary securing method to further enhance the joint in the high vibration environment.
- Bearings 73 mount the roller pin 48 within each crank collar 44 and 46 .
- the bearings 73 include an outer race 72 moving with the crank collar 44 and 46 and an inner race 74 moving with the roller pins 48 .
- Ball bearings 76 sit between the races 72 and 74 .
- Channels 78 in the roller pin 48 are associated with each bearing 73 .
- the channels receive a wave spring 80 , and the wave springs 80 apply a bias outwardly through a shim 82 to resist movement of the inner races 74 .
- both channels 78 are positioned between the two opposed inner races 74 .
- the term “outwardly” as utilized in this paragraph means that each spring biases its shim 82 and inner race 74 in opposed directions.
- the wave springs 80 may be formed of Inconel®.
- Inconel® is a registered trademark of Special Metals Corporation for a family of austenitic nickel-chromium steel superalloys.
- other appropriate materials such as 1707 steel which can withstand the temperatures expected to be experienced at the locations may be utilized.
- a nickel alloy steel may be appropriate.
- the shims may be formed of an appropriate steel.
- the size of the shims 82 is selected in combination with the spring force of the wave springs 80 to get to a desired preload. Thus, preferably, there would be some limited movement of the inner races 74 , but that amount of movement is controlled, and limited by the wave springs 80 .
- the shims 82 assist in limiting this movement to a desired amount of movement.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 17/012,666 filed on Sep. 4, 2020.
- This application relates to a vibration resistant mount for roller pin bearings on a butterfly valve.
- Butterfly valves are known, and utilized in any number of applications. In general, a butterfly valve includes a valve member which pivots within a fluid passage to control the amount of opening of the fluid passage.
- An actuator piston drives a roller pin, and the roller pin drives a crank shaft to in turn rotate a valve shaft to cause the valve member to pivot within the fluid passage, and control the amount of fluid passing through the passage.
- The roller pin is mounted on bearings such that crank collars of the crank shaft may rotate about the roller pin.
- One application for a butterfly valve is in an anti-ice system for a gas turbine engine. In such system, relatively hot air is selectively directed to areas that might experience icing to melt the ice.
- A butterfly valve includes a valve member mounted on a shaft to pivot within a fluid passage. An actuator includes a piston having opposed piston heads associated with fluid chambers. A control selectively moves the piston in a linear direction to control a position of the valve member in the fluid passage. The piston causes a roller pin to move as the piston moves linearly. The roller pin is mounted in crank collars of a crank shaft such that movement of the roller pin causes the crank collars to rotate a crank shaft rotating position, and the valve shaft. The roller pin is mounted within the crank collars by bearings. The bearings each have an outer race associated with one of the crank collars, an inner race associated with the roller pin, and bearing members separate the inner and outer race. There is a spring bias resisting movement of the inner races relative to said roller pin.
- A gas turbine engine anti-ice system is also disclosed.
- These and other features of this application may be best understood from the following drawings and specification, the following is a brief description.
-
FIG. 1 shows an anti-ice system schematically. -
FIG. 2 is a cross sectional view through a butterfly valve actuator as shown along line 2-2 ofFIG. 1 . -
FIG. 3 is a top cutaway view of the actuator ofFIG. 2 . -
FIG. 4 shows a detail of a crankshaft and roller pin arrangement. - An
anti-ice system 20 controls the flow of hot air from asource 22, such as a gas turbine engine compressor, to adestination 24. Thedestination 24 may be an area on an associated aircraft that needs deicing. Abutterfly valve 25 is shown controlling the amount of airflow from thesource 22 to thedestination 24.Butterfly valve 25 may be mounted directly on agas turbine engine 26, shown schematically. With such a mount, thebutterfly valve 25 will experience vibration during operation. - The
butterfly valve 25 includes avalve member 28 that pivots within afluid passage 30 to control the amount of airflow. Anactuator 32 controls the position of thevalve member 28. Acontrol 33 supplies fluid to opposed chambers (seeFIG. 2 ) to move a piston, and control the position of members. -
FIG. 2 is a cross-sectional view along line 2-2 as shown inFIG. 1 . As shown, theactuator 32 includes a piston havingpiston heads fluid chambers piston connecting portion 51 connectspiston heads - Fluid is selectively delivered by
control 33 into thechambers valve member 28. Avalve shaft 42 is driven to rotate to cause avalve shaft extension 40 to move thevalve member 28. Aroller pin 48drives crank collars crank shaft 70 to cause thevalve shaft 42 to rotate. -
FIG. 3 shows detail with apiston connecting member 51 androller pin 48. As shown,roller pin 48 moves within aslot 61 to cause thecrank shaft 70 to rotate and rotate thevalve shaft 42. As understood, as thepiston 50/51/52 moves linearly, theroller pin 48 will slide within theslot 61, and cause thecrank shaft 70 to rotate. -
FIG. 4 shows details of thecrankshaft 70 having abore 71 in a rotatingportion 75 receiving thevalve shaft 42.Crank collars portion 75 of thecrankshaft 70. Thecrank collars roller pin 48. As shown, theroller pin 48 receives aretention bolt 60 having ahead 62 and aretention nut 66 at aremote end 64 of thebolt 60.Bolt 60 extends through abore 81 inroller pin 48. Torque between the bolt and nut provides the primary method of securing the bolt to the nut. Secondary retention is obtained via a lockinghelical coil insert 68. Finally, atack weld 100 secures thebolt end 64 to theretention nut 66 as a tertiary securing method to further enhance the joint in the high vibration environment.Bearings 73 mount theroller pin 48 within eachcrank collar bearings 73 include anouter race 72 moving with thecrank collar inner race 74 moving with theroller pins 48.Ball bearings 76 sit between theraces -
Channels 78 in theroller pin 48 are associated with each bearing 73. The channels receive awave spring 80, and thewave springs 80 apply a bias outwardly through ashim 82 to resist movement of theinner races 74. As is clear fromFIG. 4 , bothchannels 78 are positioned between the two opposedinner races 74. The term “outwardly” as utilized in this paragraph means that each spring biases itsshim 82 andinner race 74 in opposed directions. - Now, when vibration is experienced the
wave springs 80 andshims 82 resist movement of theinner races 74. - The
wave springs 80 may be formed of Inconel®. Inconel® is a registered trademark of Special Metals Corporation for a family of austenitic nickel-chromium steel superalloys. However, other appropriate materials (such as 1707 steel) which can withstand the temperatures expected to be experienced at the locations may be utilized. In general, a nickel alloy steel may be appropriate. Similarly, the shims may be formed of an appropriate steel. - The size of the
shims 82 is selected in combination with the spring force of the wave springs 80 to get to a desired preload. Thus, preferably, there would be some limited movement of theinner races 74, but that amount of movement is controlled, and limited by the wave springs 80. Theshims 82 assist in limiting this movement to a desired amount of movement. - Although an embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this disclosure. For that reason, the following claims should be studied to determine the true scope and content of this disclosure.
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/689,323 US20220196154A1 (en) | 2020-09-04 | 2022-03-08 | Butterfly valve with vibration resistant mount |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/012,666 US11313473B2 (en) | 2020-09-04 | 2020-09-04 | Butterfly valve with vibration resistant mount |
US17/689,323 US20220196154A1 (en) | 2020-09-04 | 2022-03-08 | Butterfly valve with vibration resistant mount |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/012,666 Continuation US11313473B2 (en) | 2020-09-04 | 2020-09-04 | Butterfly valve with vibration resistant mount |
Publications (1)
Publication Number | Publication Date |
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US20220196154A1 true US20220196154A1 (en) | 2022-06-23 |
Family
ID=76765083
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/012,666 Active US11313473B2 (en) | 2020-09-04 | 2020-09-04 | Butterfly valve with vibration resistant mount |
US17/689,323 Pending US20220196154A1 (en) | 2020-09-04 | 2022-03-08 | Butterfly valve with vibration resistant mount |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US17/012,666 Active US11313473B2 (en) | 2020-09-04 | 2020-09-04 | Butterfly valve with vibration resistant mount |
Country Status (2)
Country | Link |
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US (2) | US11313473B2 (en) |
EP (1) | EP3964737B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117704081B (en) * | 2024-02-05 | 2024-04-09 | 四川顺腾机械制造有限公司 | High-pressure pneumatic execution valve |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3753386A (en) | 1971-03-03 | 1973-08-21 | F Scott | Valve actuator |
US3797324A (en) | 1972-07-31 | 1974-03-19 | Res Eng Co | Actuator |
CA1062975A (en) | 1975-09-19 | 1979-09-25 | Homer J. Shafer | Piston operator for imparting rotary motion |
US4507005A (en) | 1983-11-21 | 1985-03-26 | Clark Equipment Company | Pivot joint |
US5906029A (en) * | 1997-03-25 | 1999-05-25 | Fox; Larry | Hinge repair kit and installation method |
US20100108932A1 (en) * | 2008-10-31 | 2010-05-06 | Bauer Robert R | Bearing assembly and a method for controlling fluid flow within a conduit |
US20120144939A1 (en) * | 2010-12-13 | 2012-06-14 | Arne Lars Jonas Kullin | Double Bearing Assembly for Rotating Shaft |
US9550518B2 (en) * | 2013-12-31 | 2017-01-24 | Trw Automotive U.S. Llc | Electric power steering assembly |
US10088056B2 (en) | 2015-01-26 | 2018-10-02 | Hamilton Sundstrand Corporation | Butterfly valve with modified scotch yoke connection |
US9958071B1 (en) * | 2017-02-15 | 2018-05-01 | Hamilton Sundstrand Corporation | High temperature shaft seal for bleed valve with roller bearings |
US10359183B2 (en) | 2017-06-07 | 2019-07-23 | Fluence Bioengineering, Inc. | Systems and methods for lighting fixtures |
-
2020
- 2020-09-04 US US17/012,666 patent/US11313473B2/en active Active
-
2021
- 2021-07-05 EP EP21183784.4A patent/EP3964737B1/en active Active
-
2022
- 2022-03-08 US US17/689,323 patent/US20220196154A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
EP3964737B1 (en) | 2023-11-15 |
EP3964737A1 (en) | 2022-03-09 |
US11313473B2 (en) | 2022-04-26 |
US20220074500A1 (en) | 2022-03-10 |
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