US3795173A - Cascade throttle - Google Patents

Cascade throttle Download PDF

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Publication number
US3795173A
US3795173A US00316377A US3795173DA US3795173A US 3795173 A US3795173 A US 3795173A US 00316377 A US00316377 A US 00316377A US 3795173D A US3795173D A US 3795173DA US 3795173 A US3795173 A US 3795173A
Authority
US
United States
Prior art keywords
recesses
throttle
sleeve member
partition walls
sectors
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
US00316377A
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English (en)
Inventor
P Freymond
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US3795173A publication Critical patent/US3795173A/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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02772—Throttle passages using spirally or helically shaped channels

Definitions

  • a cascade throttle having a sleeve within which there are provided a number of hollow compartments or spaces bounded by partition or intermediate walls. Recesses are arranged at the intermediate walls and these recesses establish flow connections between neighboring hollow compartments. The recesses of neighboring intermediate walls and which are arranged between the sleeve member and the intermediate walls are situated diametrically opposite one another. The recesses at the intermediate wall form between the latter and the wall of the sleeve member a respective gap having the shape of a circular ring sector.
  • Each hollow compartment is subdivided into a number of sectors by a substantially star-shaped web, and the sectors are connected with one another by throttle locations formed by the tips of the star-shaped web.
  • the present invention relates to a new and improved construction of cascade throttle possessing within a sleeve member a number of hollow compartments or spaces bounded by partition or intermediate walls, recesses being arranged at the intermediate walls and such recesses establishing flow connections between neighboring hollow compartments, the recesses of the I neighboring intermediate walls and which are arranged between the sleeve member and the intermediate walls are located diametrically opposite one another.
  • a known construction of cascade throttle has the axial extent of the intermediate walls approximately equal to the axial extent of the hollow compartments, and the recesses at the intermediate walls possess the shape of circular segments.
  • the throttle locations in the flow direction should be as short as possible, i.e., the intermediate walls should be thin.
  • cylindrical intermediate walls should not be too thin, otherwise they will become deformed by the gas pressure.
  • the cross-section of a throttle opening should possess a large peripheral length in relationship to the throughflow surface, and the throughflow surface therefore should have the form of a narrow gap.
  • each of the recesses at the partition or intermediate walls between the latter and the wall of the sleeve member form a gap possessing the shape of a substantially circular ring sector, and each hollow compartment is subdivided into a number of sectors by a substantially star-shaped web member, and the aforementioned sectors are connected by throttle locations formed by the tips of the star-shaped web member.
  • the cascade throttle of this development can be advantageously arranged in a cadence control or regulator for an automatic firing weapon.
  • the present invention aims at maintaining the cadence constant independent of the temperature of the gases while avoiding a too large size cascade throttle with a great number of cutouts.
  • FIG. 1 is a sectional view through the barrel of a firing weapon at the region of the gas removal channel and through a gas cylinder arranged therebelow with an insert member;
  • FIG. 2 is an enlarged view of the insert member arranged in a sleeve and employed in the arrangement of FIG. 1;
  • FIG. 3 is a cross-sectional view of the insert member arranged in a sleeve as depicted in FIG. 2, and taken substantially along the line IIIIII thereof;
  • FIG. 4 is a cross-sectional view of the arrangement depicted in FIG. 2, taken substantially along the line IV-IV thereof;
  • FIG. 5 is a cross-sectional view of the arrangement depicted in FIG. 2, taken substantially along the line VV thereof.
  • FIG. 1 a barrel or tubular member 1 is inserted in a closure housing 2 of an automatic firing weapon.
  • the closure housing 2 possesses a cylindrical compartment 3 connected by a gas removal or withdrawal channel 4 with the interior of barrel 1.
  • the cylindrical compartment 3 is closed by an insert member 5 and contains a displaceable piston 6 to which is secured a piston rod 7.
  • the rear end 7a of the piston rod 7 extends through an end wall 20 bounding the cylindrical compartment 3 and bears against a sleeve member 8 subjected to the pressure of a spring 9 or equivalent structure.
  • the piston 8 bears with its end surface 8a against the rear end surface 10 of insert member 5.
  • a package of annular or ring springs 11 functioning as a buffer for the piston member 6, and which cooperate with a ring-shaped or annular stop or shoulder 12 of the piston rod 7.
  • a bore I3 opens into the cylindrical compartment 3 and communicates the interior thereof with the surrounding atmosphere.
  • the insert member 5 possesses threading 14, a threaded head 15 with an internal hexagonal bore 16, so that the insert member 5 can be sealingly threadably screwed into the closure housing 2.
  • the insert member 5 possesses a central blindhole bore 37 which opens into the end surface H and widens forwardly thereof. According to the showing of HGV 3, it will be recognized that four bores 38 open into the end of the blindhole bore l7 and are located essentially perpendicular thereto. Between the threading l4 and the one flange 20 of the insert member there are provided a row or series of cutouts 46 which are formed by the partition or intermediate walls 2i. These partition walls Zll, as best seen by referring to FIG. 4, possess along one half of their periphery a larger diameter than over the remainder of their periphery.
  • the web 21a between two neighboring partition or intermediate walsl 211 possesses four arch-shaped recesses 22, so that there are formed four substantially radially extendings arms Zlb possessing the tip portions 23 and 24 of the star-like web. As particularly well recognized by inspecting FIG. 4 both of the tip portions 23 are somewhat longer than both of the tip portions 24.
  • the web between the flange and the first partition wall 21 is constructed in such a manner that its tips 27 all possess the same length.
  • the rigidity of the partition walls is especially also increased by the aforementioned tip portions 23, 24 and 27.
  • the tips 24 have the additional function of acting as throttle locations.
  • the flange 20 possesses a groove 29 in which there is located a sealing ring member which prevents gas from flowing out of the cutout directly behind the flange into the space in front of the piston 6.
  • the gas flows firstly through the gas removal channel 4 into the cutout 40 behind the flange Ed. in this first cutout the gas initially must flow past the tips or tip portions 27 and moves out of such cutout past the first partition wall Zll into the neighboring cutout.
  • the gas can only flow past one half of the periphery of the first partition wall 21 which possesses the smaller diameter, since the other half containing the larger diameter sealingly bears against the sleeve member 36D, as shown.
  • the portion with the smaller diameter is offset by 180 with regard to the portion of the first partition wall. Therefore, if the gas is to arrive from the second into the third cutout, it must first flow past the tips 24 of the web between the partition walls 21, so that it can flow past the second partition wall into the third cutout.
  • the gas at each cutout must initially flow past both of the tip portions 24 before it can flow past the next partition wall 21 into the next successive cutout. Consequently, the gas is throttled on the one hand by the ring gap which extends over one-half of the periphery or circumference and located between partition wall and sleeve member 30 and, on the other hand, is also throttled during the time that it flows past the tip portions 24.
  • the gas is throttled at each cutout at two locations. so that there is realized a pronounced pressure drop.
  • the final pressure is independent of the starting pressure so that there is produced a constant cadence.
  • A. cascade throttle arrangement comprising a sleeve member containing a number of hollow compartments bounded by partition walls, said partition walls being provided with recesses establishing connections between neighboring hollow compartments, the recesses of neighboring partition walls which are arranged between the sleeve member and the intermediate wall being located at diametrically opposed locations, the recesses at each partition wall forming between the latter and the wall of the sleeve member a gap possessing the shape of a substantially circular ring sector, each hollow compartment being subdivided by a substantially star-shaped web member into a number of sectors, said sectors being connected by throttle locations formed by tip portions of the star-like web member.
  • a cascade throttle arrangement comprising a sleeve member equipped with partition walls bounding a number of hollow compartments, said partition walls having recesses for connecting neighboring hollow compartments, the recesses at the partition walls forming between the latter and the wall of the sleeve member respective gap means each possessing the shape of a substantially circular ring sector, each hollow compartment being subdivided by a substantially starshaped web member into a number of sectors, and said sectors being connected by throttle locations formed by tip portions of the star-like web member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Actuator (AREA)
  • Lighters Containing Fuel (AREA)
US00316377A 1972-01-07 1972-12-18 Cascade throttle Expired - Lifetime US3795173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH26172 1972-01-07

Publications (1)

Publication Number Publication Date
US3795173A true US3795173A (en) 1974-03-05

Family

ID=4182968

Family Applications (1)

Application Number Title Priority Date Filing Date
US00316377A Expired - Lifetime US3795173A (en) 1972-01-07 1972-12-18 Cascade throttle

Country Status (7)

Country Link
US (1) US3795173A (fr)
JP (1) JPS5147999B2 (fr)
CH (1) CH546891A (fr)
FR (1) FR2167736B1 (fr)
GB (1) GB1369972A (fr)
IT (1) IT973213B (fr)
SE (1) SE396996B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080307954A1 (en) * 2005-12-23 2008-12-18 Norbert Fluhr Gas bleed assemblies for use with firearms
US20100218671A1 (en) * 2008-12-30 2010-09-02 Magpul Industries Corporation Adjustable and Suppressible Gas Operating System for an Automatic Firearm
WO2012097334A3 (fr) * 2011-01-14 2013-08-15 ArmWest, LLC Arme à feu permettant un changement rapide du canon
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US8813406B1 (en) 2010-03-25 2014-08-26 ArmWest, LLC High capacity magazine with multiple springs
US8973483B2 (en) 2010-03-25 2015-03-10 Arm West, Llc Gas regulator system
US9038525B2 (en) 2011-01-14 2015-05-26 ArmWest, LLC Firearm
US9243859B1 (en) * 2014-01-16 2016-01-26 FN America, LLC Gas block valve stem for modifying the firing rate of a machine gun
US9488423B2 (en) 2011-01-14 2016-11-08 Arm West, Llc Firearm systems and methods
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US10488136B2 (en) 2016-09-23 2019-11-26 ArmWest, LLC Selective fire firearm systems and methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680434A (en) * 1969-07-11 1972-08-01 Werkzeug Mas Fab Derlikon Buhr Firing rate regulator for a gas-operated firearm
US3690219A (en) * 1969-07-01 1972-09-12 Oerlikon Buehrle Ag Gas-operated automatic firearm having thermal firing rate control

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE630127C (de) * 1933-08-29 1936-05-20 Ludvig Birch Dipl Ing Vorrichtung zur Geraeuschdaempfung und zum Regeln der maximalen Ausflussmenge von Zapfventilen in Wasserversorgungsanlagen
US2400161A (en) * 1943-08-24 1946-05-14 Worthington Pump & Mach Corp Multiple orifice throttling device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690219A (en) * 1969-07-01 1972-09-12 Oerlikon Buehrle Ag Gas-operated automatic firearm having thermal firing rate control
US3680434A (en) * 1969-07-11 1972-08-01 Werkzeug Mas Fab Derlikon Buhr Firing rate regulator for a gas-operated firearm

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7621210B2 (en) * 2005-12-23 2009-11-24 Heckler & Koch, Gmbh Gas bleed assemblies for use with firearms
US20080307954A1 (en) * 2005-12-23 2008-12-18 Norbert Fluhr Gas bleed assemblies for use with firearms
US20100218671A1 (en) * 2008-12-30 2010-09-02 Magpul Industries Corporation Adjustable and Suppressible Gas Operating System for an Automatic Firearm
US8813406B1 (en) 2010-03-25 2014-08-26 ArmWest, LLC High capacity magazine with multiple springs
US8973483B2 (en) 2010-03-25 2015-03-10 Arm West, Llc Gas regulator system
US10415906B2 (en) 2011-01-14 2019-09-17 ArmWest, LLC Firearm systems and methods
US9038525B2 (en) 2011-01-14 2015-05-26 ArmWest, LLC Firearm
US9228786B2 (en) 2011-01-14 2016-01-05 ArmWest, LLC Quick barrel change firearm
US9488423B2 (en) 2011-01-14 2016-11-08 Arm West, Llc Firearm systems and methods
WO2012097334A3 (fr) * 2011-01-14 2013-08-15 ArmWest, LLC Arme à feu permettant un changement rapide du canon
US11137222B2 (en) 2011-01-14 2021-10-05 ArmWest, LLC Firearm systems and methods
US8528458B2 (en) 2011-07-27 2013-09-10 Bernard T. Windauer Pressure-regulating gas block
US9243859B1 (en) * 2014-01-16 2016-01-26 FN America, LLC Gas block valve stem for modifying the firing rate of a machine gun
US9719739B2 (en) 2014-02-06 2017-08-01 Bernard (Bernie) T. Windauer Gas block balancing piston for auto-loading firearm
US10488136B2 (en) 2016-09-23 2019-11-26 ArmWest, LLC Selective fire firearm systems and methods
US11650023B2 (en) 2016-09-23 2023-05-16 Arm West, Llc Selective fire firearm systems and methods

Also Published As

Publication number Publication date
GB1369972A (en) 1974-10-09
FR2167736B1 (fr) 1975-10-31
FR2167736A1 (fr) 1973-08-24
DE2261246A1 (de) 1973-07-12
JPS4878800A (fr) 1973-10-22
DE2261246B2 (de) 1975-12-04
IT973213B (it) 1974-06-10
JPS5147999B2 (fr) 1976-12-17
SE396996B (sv) 1977-10-10
CH546891A (de) 1974-03-15

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