US3441249A - Flow control valve - Google Patents

Flow control valve Download PDF

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Publication number
US3441249A
US3441249A US510647A US3441249DA US3441249A US 3441249 A US3441249 A US 3441249A US 510647 A US510647 A US 510647A US 3441249D A US3441249D A US 3441249DA US 3441249 A US3441249 A US 3441249A
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US
United States
Prior art keywords
valve
needle
needle valve
orifice
flow
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.)
Expired - Lifetime
Application number
US510647A
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English (en)
Inventor
Wilfred Aslan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALKON PRODUCTS CORP
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ALKON PRODUCTS CORP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ALKON PRODUCTS CORP filed Critical ALKON PRODUCTS CORP
Application granted granted Critical
Publication of US3441249A publication Critical patent/US3441249A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • F16K47/10—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths in which the medium in one direction must flow through the throttling channel, and in the other direction may flow through a much wider channel parallel to the throttling channel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8225—Position or extent of motion indicator
    • Y10T137/8275—Indicator element rigidly carried by the movable element whose position is indicated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87298—Having digital flow controller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87515—Mechanical movement between actuator and valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87539—Having guide or restrictor

Definitions

  • the .present invention relates to flow control valves for regulating the flow of fluid and more particularly to a flow control valve of the needle type construction which is compact and inexpensive to produce, one which has a relatively large unrestricted flow area between axially aligned ports and in Which the needle, disposed between the ports may be precisely adjusted to vary the rate of flow of fluid through the valve.
  • Flow control valves having an adjustable needle member disposed between end ports of the valve are presently available; however, they possess certain inherent characteristics as far as their structure and operation which are undesirable.
  • the needle is adapted to cooperate with a metering orifice disposed internally of the valve to vary the size of the fluid passageway extending through this orifice.
  • This adjustment of the size of flow passageway is effected by moving the needle into and out of the orifice; however, with present constructions, the degree to which the fluid flow is controllable varies as the needle is moved between a fully closed position and a fully opened position.
  • accurate control of the fluid flow may be effected for only low flow rates and not for medium or large flow rates while in other situations where the needle valve is constructed for accurate adjustment of medium and large flow rates, the needle is less sensitive to low flow rates.
  • the needle mechanism is typically comprised of a number of separate parts with the connections between these parts in direct communication with the internal pressure created by the fluid passing through the valve.
  • Such a construction gives rise to fluid sealing problems and requires that extra care be taken in assuring that these connections are completely leak proof and this, of course, adds to the expense involved in forming the parts that make up the valve and in assembling them together.
  • valves of this construction In addition to the fact that steps must be taken to prevent accidenal removal of the needle member in valves of this construction, it is nevertheless sometimes desirable to be able to disassemble the needle member from the valve housing as for example where repairs or replacement is found to be in order. With presently constructed valves of this type, however, this can require that the entire valve unit be first removed from the system in order to gain access to the internal structure of the needle mechanism for releasing the locking mechanism. It is apparent that this can result in excessive down time and as such is undesirable.
  • the valve of the present invention includes a body member having a flow passageway extending therethrough, a valve seat positioned within the passageway and forming a metering orifice connecting together two portions of the passageway, and a needle valve member mounted on the valve'body for movement toward and away from the valve metering orifice to control the rate of fluid flow through the orifice.
  • the valve body For purposes of mounting the needle valve member in operative position with respect to the valve metering orifice, the valve body is provided with a support member tormed integrally therewith.
  • the needle valve member is, in turn, received in an opening extending through the support member and retained therein by means of a retainer connected to the support member.
  • the metering end of the needle valve member which is positioned for cooperating with the metering orifice is provided with differently tapered portions so that the rate of flow of fluid through the orifice may be accurately controlled for both low and higher flow rates while the opposite end of the needle valve member extends outwardly beyond the support member and retainer and has connected thereto a control knob.
  • This control knob is adapted to be manually actuated to move the needle valve member axially within the support member to thereby adjust the size of the metering orifice.
  • a seal is effected between the needle valve and surrounding support member at a location disposed between the retainer and the valve fluid passageway. In this way, fluid within the valve is prevented from reaching the point of connection of the retainer and thus, this connection need not be precision made in the sense of being leak proof.
  • a positive locking arrangement for preventing accidental disconnection of the needle valve member as it is moved outwardly away from the metering orifice.
  • the needle valve member intermediate its ends is provided with a flange facing in a direction away from the orifice and the retainer is provided with a cooperating oppositely facing flange.
  • the stop mechanism of the present invention is constructed so as to be readily accessible by the operator whereby the metering valve mechanism may be completely disassembled if desired.
  • the retainer member is releasably connected to the support member and since it defines one part of the stop mechanism, its removal will permit full removal of the needle valve member.
  • FIG. 1 is a perspective view of the flow control valve of the present invention
  • FIG. 2. is a cross-sectional View of the valve shown in FIG. 1 with the needle valve shown in one position of adjustment;
  • FIG. 3 is a partial cross-sectional view of the valve of FIG. 1 with the needle member shown in a second position of adjustment.
  • the flow control valve of the present invention is generally comprised of a valve body member 1 having a flow passageway 2 extending therethrough, a metering orifice 3 positioned intermediate the ends of the passageway, a needle valve metering mechanism 4, and a control knob 5 attached to the needle valve member for adjusting the position of the latter with respect to the metering orifice.
  • the body member 1 of the valve is constructed of a one-piece, high tensile strength, brass forging; and as an integral part thereof, an outwardly extending support member 6 is formed for supporting the needle valve metering member 4.
  • the fluid flow passageway 2 extending through the valve body is generally divided into two portions. One portion 2 extends axially through the valve body from oppositely disposed valve ports 7 and 8 while the other portion 2" is defined by a drilled hole extending at an angle relative to the portion 2'. This drilled hole communicates at one end with the passageway portion 2' and at its other end with an opening 9 extending through the support member 6. This opening 9, in turn, communicates with the metering orifice 3 and through this orifice is connected directly to the portion 2' of the passageway.
  • a valve seat 10 surrounds the metering orifice and faces in a direction toward the opening 9 of the support member for cooperating with the needle valve member to completely close the orifice as more fully described below.
  • the portion 2" of the flow passageway 2 is aligned with respect to the port 7 whereby the drilling of this portion may be effected through the port 7.
  • the support 6 for the needle valve 4 extends outwardly of the valve body and terminates in an internally threaded end 11.
  • the opening through the support member is enlarged adjacent this end to define a seat 12 facing in a direction away from the metering orifice 3.
  • the needle valve member constructed of heat treated, ground and polished 416 stainless steel or the like, extends longitudinally through the support member and is held therein by means of a retainer 13 formed of cold drawn brass.
  • This retainer has an externally threaded neck portion 14 extending downwardly into the enlarged opening of the support member terminating at a position spaced from the seat 12.
  • the retainer is connected to the support member by threaded engagement therewith as shown at 15 and is provided with a threaded bore 16 through which the needle valve member extends.
  • the needle valve member is, in turn provided with a cooperating threaded portion 17 for threadably connecting it to the retainer.
  • the needle valve member is threaded through the retainer and the retainer, in turn, threaded to the support member until it is sufliciently tight so as to remain fixed relative to the support member upon subsequent rotation of the needle valve member.
  • the axial position of the needle valve member may then be adjusted relative to the metering orifice 3 by rotation thereof relative to the support member and retainer; and for this purpose, the outwardly extending end of the needle valve member is provided with the control knob 5 which is locked thereto by means of a set screw 18.
  • the retainer 13 and needle valve member 4 are provided with cooperating positive locking flanges 19, 20, respectively.
  • the flange 19 is formed along the bore 16 of the retainer and faces in a direction toward the metering orifice 3 while the flange 20 of the needle valve member faces in a direction away from the metering orifice 3.
  • the location of the flange 19 of the retainer is so oriented relative to the metering orifice so that when engaged by the flange 20 of the needle valve member, the valve member will have moved to a fully opened position with respect to the metering orifice to allow maximum flow of fluid therethrough.
  • leakage of fluid through the support member is prevented by means of an O-ring 21 of resilient material disposed about the needle valve member.
  • This sealing means is positioned with respect to the point of threaded connection 15 of the retainer 13 to the support member 6 so that fluid pressure created within the fluid passageway of the valve will be prevented from reaching this connection.
  • the O-ring is positioned within the opening 9 of the support member 6 intermediate the seat 12 of the support and the neck 14 of the retainer and is backed up by an annular washer 22 constructed of Teflon or suitable material positioned adjacent the retainer neck 14.
  • the needle valve member 4 is constructed to provide accurate control of the fluid flow through the metering orifice 3 both for low flow rates and for medium and large flow rates.
  • the operative end of the metering valve member is provided with two conically tapered portions 23, 24.
  • the portion '23 is tapered at a 3 angle relative to the longitudinal axis of the needle valve member while the portion 24 is tapered at a 15 angle with respect to the axis of the needle valve member.
  • a seat portion 25 is constructed to face the valve seat 10. Accordingly, a complete closing of the metering orifice may be effected by turning of the needle valve until the port-ion 25 is seated against the valve seat 10.
  • the seat portion 25 is formed at the upper section of the tapered portion 23.
  • the tapered portion 23 has a minimum diameter less than the diameter of the orifice of the valve seat and a maximum diameter larger than the diameter of the orifice.
  • control knob 5 and support member 6 are provided with cooperating calibrated dials,
  • the control knob which is generally cupshaped is provided around its open end with uniformly spaced graduation marks 26 ranging from zero to nine.
  • the outer surface of the support member 6 is, in turn,
  • each row of indicia is comprised of a single set of numbers ranging from zero to five and each row is uniformly spaced from the adjacent row along the axis of the needle valve member.
  • the support member is provided with an axially extending reference line 28.
  • the pitch of the threads of the portion 17 of the needle valve member is such that one full rotation of the control knob will efiect an axial movement thereof from one row of indicia 27 of the same relative position on the next row of indicia. Accordingly, with this arrangement, it is apparent that the position of the needle valve member relative to the metering orifice may be repeatedly set at the same value by appropriate adjustment of the control knob and the graduation marks 26 relative to the indicia 27 and reference line 28.
  • a set screw 29 extending through the control knob may be tightened against the retainer member to lock the metering valve in any desired position of adjustment against accidental movement.
  • a check valve mechanism generally designated at 30 is positioned within the passageway 2 between the metering orifice 3 and the connection of the passageway portion 2'' with the portion 2', This check valve mechanism permits the flow of fluid through the valve body to bypass the metering orifice 3 when in a direction to the left as viewed in FIG. 1. When, however, the flow of fluid is in the opposite direction, the check valve will remain closed and the fluid will be caused to flow through the metering orifice and will thus be under the control of the metering mechanism.
  • the check velve mechanism is generally comprised of a ball member 31 resiliently urged against a check valve set 32 formed in the portion 2' of the passageway.
  • the ball 31 is held in operative position within the passageway by means of a ball retainer member 33 and spring member 34.
  • the specific details of the ball check mechanism forms the subject matter of another application, Ser. No. 510,645 filed on Nov. 30, 1965 and reference is made to that application for a complete description thereof.
  • a flow control valve comprising a body member having a passageway extending therethrough, a valve seat disposed in said passageway and having an orifice therethrough connecting one portion of said passageway to a second portion thereof, a support member disposed on one side of said valve seat and extending outwardly from said body member, and a metering mechanism mounted on said support member for controlling the rate of flow of fluid through said orifice, said mechanism comprising an elongated cylindrical needle valve member mounted for axial movement transversely of said valve seat from a first position disposed within said orifice and seated against said valve seat to close said orifice to a second position spaced axially of said first position on said one side of the valve seat to open said orifice, said needle valve member having two tapered metering surfaces at the free end thereof which are tapered in the direction of movement of said needle valve member from said second position to said first position, said metering surfaces comprising first and second conical'ly tapered portions with the first portion disposed axially outwardly of said second portion

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Nozzles (AREA)
  • Lift Valve (AREA)
  • Check Valves (AREA)
US510647A 1965-11-30 1965-11-30 Flow control valve Expired - Lifetime US3441249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51064765A 1965-11-30 1965-11-30

Publications (1)

Publication Number Publication Date
US3441249A true US3441249A (en) 1969-04-29

Family

ID=24031592

Family Applications (1)

Application Number Title Priority Date Filing Date
US510647A Expired - Lifetime US3441249A (en) 1965-11-30 1965-11-30 Flow control valve

Country Status (3)

Country Link
US (1) US3441249A (enrdf_load_stackoverflow)
JP (1) JPS519931B1 (enrdf_load_stackoverflow)
GB (1) GB1156811A (enrdf_load_stackoverflow)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581762A (en) * 1968-08-12 1971-06-01 Parker Hannifin Corp Speed control valve for fluid motors
US3707987A (en) * 1970-08-03 1973-01-02 Mueller Steam Specialty Divisi Adjustable valve assembly
US3761052A (en) * 1972-02-07 1973-09-25 Whitney Res Tool Co Flow plugger valve
DE2401286A1 (de) * 1973-01-11 1974-07-18 Rexnord Inc Mehrzweckventil
US4026516A (en) * 1970-05-28 1977-05-31 Whitey Research Tool Co. Ball valve stem guide
US4099703A (en) * 1976-10-12 1978-07-11 Ideal-Aerosmith, Inc. Self-cleaning precision metering valve
US4171007A (en) * 1976-03-05 1979-10-16 Societe Anonyme: La Telemecanique Electrique Unidirectional flow limiter
US4503915A (en) * 1982-04-03 1985-03-12 Feecon Corporation Proportioning system
US4661096A (en) * 1985-09-06 1987-04-28 Edward Teeple Anti-air embolism and antiblood loss device for CVP catheter
US4958769A (en) * 1988-12-27 1990-09-25 Ford Motor Company Compressed O-ring spray gun needle valve seal
US5085243A (en) * 1991-02-14 1992-02-04 Westinghouse Air Brake Company Hydraulic isolation valve for railway vehicle
US5730420A (en) * 1995-09-15 1998-03-24 Parker-Hannifin Corporation Ball valve having one-piece packing
US6581623B1 (en) * 1999-07-16 2003-06-24 Advanced Technology Materials, Inc. Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels
US20050224737A1 (en) * 2004-04-08 2005-10-13 Mihaylov Gueorgui M Hybrid flow metering valve
US20150059864A1 (en) * 2012-03-07 2015-03-05 Waters Technologies Corporation Method, system and apparatus for automatic calibration of a needle valve device in a pressurized flow system
US20190264486A1 (en) * 2018-02-23 2019-08-29 Schlage Lock Company Llc Door closer apparatus and method
US10858872B2 (en) * 2018-06-19 2020-12-08 Schlage Lock Company Llc Door closer casings
US11280413B2 (en) * 2019-04-04 2022-03-22 ADS Services LLC Choke valve having gate body with multiple metering segments
US11761276B2 (en) 2020-04-30 2023-09-19 ADS Services, LLC Flow measurement choke valve system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4891505U (enrdf_load_stackoverflow) * 1972-02-03 1973-11-02
JPS4928226U (enrdf_load_stackoverflow) * 1972-06-12 1974-03-11
JPS53148836U (enrdf_load_stackoverflow) * 1977-04-27 1978-11-22
JPS541526U (enrdf_load_stackoverflow) * 1977-06-02 1979-01-08
JPS54149431U (enrdf_load_stackoverflow) * 1978-04-07 1979-10-17
JPS5631515U (enrdf_load_stackoverflow) * 1979-08-14 1981-03-27
FR2481480A1 (fr) * 1980-04-23 1981-10-30 Legris Perfectionnement aux dispositifs regulateurs de debit et de pression de fluides gazeux
DE3840182A1 (de) * 1988-11-29 1990-05-31 Wagner Gmbh & Co Fahrzeugteile Einwegeventil
US5052192A (en) * 1990-05-14 1991-10-01 Carrier Corporation Dual flow expansion device for heat pump system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514025A (en) * 1944-08-19 1950-07-04 Nat Supply Co Microchoke valve
US2606573A (en) * 1948-12-29 1952-08-12 William M Brobeck Adjustable venturi assembly
US2994343A (en) * 1956-12-26 1961-08-01 George W Banks Metering valve
US3085592A (en) * 1959-06-05 1963-04-16 Manatrol Corp Valve mechanism
US3240230A (en) * 1962-10-25 1966-03-15 Nuclear Products Company Cross pattern metering valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514025A (en) * 1944-08-19 1950-07-04 Nat Supply Co Microchoke valve
US2606573A (en) * 1948-12-29 1952-08-12 William M Brobeck Adjustable venturi assembly
US2994343A (en) * 1956-12-26 1961-08-01 George W Banks Metering valve
US3085592A (en) * 1959-06-05 1963-04-16 Manatrol Corp Valve mechanism
US3240230A (en) * 1962-10-25 1966-03-15 Nuclear Products Company Cross pattern metering valve

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581762A (en) * 1968-08-12 1971-06-01 Parker Hannifin Corp Speed control valve for fluid motors
US4026516A (en) * 1970-05-28 1977-05-31 Whitey Research Tool Co. Ball valve stem guide
US3707987A (en) * 1970-08-03 1973-01-02 Mueller Steam Specialty Divisi Adjustable valve assembly
US3761052A (en) * 1972-02-07 1973-09-25 Whitney Res Tool Co Flow plugger valve
DE2401286A1 (de) * 1973-01-11 1974-07-18 Rexnord Inc Mehrzweckventil
US4171007A (en) * 1976-03-05 1979-10-16 Societe Anonyme: La Telemecanique Electrique Unidirectional flow limiter
US4214607A (en) * 1976-03-05 1980-07-29 Societe Anonyme: La Telemecanique Electrique Unidirectional flow limiter
US4099703A (en) * 1976-10-12 1978-07-11 Ideal-Aerosmith, Inc. Self-cleaning precision metering valve
US4503915A (en) * 1982-04-03 1985-03-12 Feecon Corporation Proportioning system
US4661096A (en) * 1985-09-06 1987-04-28 Edward Teeple Anti-air embolism and antiblood loss device for CVP catheter
US4958769A (en) * 1988-12-27 1990-09-25 Ford Motor Company Compressed O-ring spray gun needle valve seal
US5085243A (en) * 1991-02-14 1992-02-04 Westinghouse Air Brake Company Hydraulic isolation valve for railway vehicle
US5730420A (en) * 1995-09-15 1998-03-24 Parker-Hannifin Corporation Ball valve having one-piece packing
US6581623B1 (en) * 1999-07-16 2003-06-24 Advanced Technology Materials, Inc. Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels
US20050224737A1 (en) * 2004-04-08 2005-10-13 Mihaylov Gueorgui M Hybrid flow metering valve
US6981689B2 (en) * 2004-04-08 2006-01-03 Gueorgui Milev Mihaylov Hybrid flow metering valve
US20150059864A1 (en) * 2012-03-07 2015-03-05 Waters Technologies Corporation Method, system and apparatus for automatic calibration of a needle valve device in a pressurized flow system
US9341277B2 (en) * 2012-03-07 2016-05-17 Waters Technologies Corporation Method, system and apparatus for automatic calibration of a needle valve device in a pressurized flow system
US20190264486A1 (en) * 2018-02-23 2019-08-29 Schlage Lock Company Llc Door closer apparatus and method
US10815712B2 (en) * 2018-02-23 2020-10-27 Schlage Lock Company Llc Door closer apparatus and method
US10858872B2 (en) * 2018-06-19 2020-12-08 Schlage Lock Company Llc Door closer casings
US11365575B2 (en) 2018-06-19 2022-06-21 Schlage Lock Company Llc Door closer casings
US12276152B2 (en) 2018-06-19 2025-04-15 Schlage Lock Company Llc Door closer casings
US11280413B2 (en) * 2019-04-04 2022-03-22 ADS Services LLC Choke valve having gate body with multiple metering segments
US11761276B2 (en) 2020-04-30 2023-09-19 ADS Services, LLC Flow measurement choke valve system

Also Published As

Publication number Publication date
GB1156811A (en) 1969-07-02
JPS519931B1 (enrdf_load_stackoverflow) 1976-03-31

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