US3751016A - Carburetion system - Google Patents

Carburetion system Download PDF

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Publication number
US3751016A
US3751016A US00127153A US3751016DA US3751016A US 3751016 A US3751016 A US 3751016A US 00127153 A US00127153 A US 00127153A US 3751016D A US3751016D A US 3751016DA US 3751016 A US3751016 A US 3751016A
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US
United States
Prior art keywords
venturi
intake conduit
throttle valve
fuel
downstream
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
US00127153A
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English (en)
Inventor
G Nardi
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.)
Compagnie des Freins et Signaux Westinghouse SA
Westinghouse Air Brake Co
Original Assignee
Compagnie des Freins et Signaux Westinghouse SA
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Filing date
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Assigned to CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), THE reassignment CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAIL ACQUISITION CORP.
Anticipated expiration legal-status Critical
Assigned to WESTINGHOUSE AIR BRAKE COMPANY reassignment WESTINGHOUSE AIR BRAKE COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMERICAN STANDARD INC., A DE CORP.
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F02M9/12—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers
    • F02M9/127—Axially movable throttle valves concentric with the axis of the mixture passage
    • F02M9/133—Axially movable throttle valves concentric with the axis of the mixture passage the throttle valves having mushroom-shaped bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/10—Engines with means for rendering exhaust gases innocuous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/10—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means
    • F02M7/106—Fluid amplifier as a device for influencing the fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/34—Measures, also constructive measures, for avoiding the generation of nixious products such as CO in the exhaust gases
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/69—Fluid amplifiers in carburetors

Definitions

  • ABSTRACT A carburetion system including a carburetor with a venturi in the air intake passageway thereof and a fuel nozzle opening thereinto downstream of the venturi, a fluidic regulator device for effecting fuel delivery from a fuel tank to said fuel nozzle for injection into said in take passageway at a rate according to a pressure differential between atmospheric pressure and a venturi induced pressure in the intake passage impressed across the control inputs of the regulator device, said carburetor including a metering element disposed within the venturi area and being axially displaceable against biasing means from a normal position adjacent the most constricted region of the venturi throat toward the least constricted region by dynamic action of intake air flow through the intake passageway, the degree of such dynamic action and, therefore, the amount of such axial displacement of said metering element being determined by the extent to which a throttle valve disposed in the intake passageway downstream of the venturi is opened, thereby proportionally modifying the effect of pressure differential across the input controls of the regulator device.
  • the object of the present invention is to provide a simplified carburetor for use in a fuel supply system for an internal combustion engine, said carburetor being characterized by a fine attunement and, therefore, a maximum sensitivity of response to all variationsof engine speeds to deliver, without hesitancy, the proper mixture of gasoline and air to the engine, even at idling speed, with a minimum of carbon monoxidc in the exhaust gases.
  • the object of the invention is attained by providing the carburetor with the usual venturi in the intake passageway and a throttle valve arranged downstream of said venturi.
  • the supply offuel to the carburetor to be mixed with air is controlled by a fluidic regulator or amplifier responsive to an air pressure differential established across two oppositely disposed control inputs thereon to act on and thus diverta portion of a fuel stream flowing through the regulator to a channel leading to the carburetor mixing chamber, said portion of fuel thus diverted being determined by the degree of said pressure differential, which is established by subjecting one of the control inputs, say a reference input, to a reference pressure such as that at the upstream end of the carburetor, and subjecting the other control input, say a signalinput, to a pressure signal from the venturi region of the carburetor.
  • a throttle or metering element is coaxially disposed in the venturi region of the carburetor and is axially displaceable, against opposing action of biasing means, by the dynamic action of intake air flowing through the venturi region.
  • Axial displacement of the metering element past one or more levels of the openings of the passageways into the venturi throat affects the pressure signal at the signal input such that the degree of said pressure signal varies in accordance with the amount of axial displacement of said metering element.
  • the extent of axial displacement of the metering element is determined by the degree of intake air flow through the venturi, which, in turn, is determined by the extent to which the throttle valve is opened.
  • FIG. 1 is a schematic view of a fuel supply system including an elevational view, mostly in section, of a carburetor according to the invention.
  • FIG. 2 is a graphical diagram of percentage of carbon monoxide emission versus the engine speed according to the effects of the carburetion system embodying the invention.
  • the carburetion system embodying the invention comprises a carburetor 1 including an air intake conduit or tubular casing 2 having an air intake passageway 3 extending coaxially therethrough with a venturi 4 formed in said passageway.
  • a carburetor 1 including an air intake conduit or tubular casing 2 having an air intake passageway 3 extending coaxially therethrough with a venturi 4 formed in said passageway.
  • the upstream end] of passageway 3 is connected to an air cleaner device (not shown), and the downstream end is connected to an intake manifold (not shown) of an internal combustion engine (not shown).
  • An accelerating throttle valve 5 is arranged in conventional manner in a uniform-diameter portion 6 of the casing 2 downstream of the venturi 4.
  • An annular chamber 7 is formed in the casing 2 in surrounding relation to the smallest diameter-or throat region of the venturi 4 with a connecting passageway 8 leading from said chamber to the exterior of the carburetor l.
  • the throat region of venturi 4 is connected to annular chamber 7 via a plurality of angularly spaced passageways 9 extending radially in a common plane passing through the smallest diameter of said thraot and perpendicular to the axis of the venturi.
  • Two other pluralities of similarly formed passageways l0 and 11 also connect the venturi throat region to chamber 7 and are disposed in planes, one above and one below, the plane in which the passageways 9 lie.
  • a main jet 12 of the carburetor l is fixed transversely in the uniform-diameter portion 6 between venturi 4 and throttle valve 5.
  • This main jet 12 comprises an induction manifold 13 of tubular form extending diametrically through the intake passageway 3 and removably secured at both ends iii the tubular casing 2.
  • Manifold 13 is provided with two sets of openings or nozzles 14 and 15 extending laterally of the plane containing the respective axes of said manifold and of intake passageway 3, each of said sets comprising respective pairs of such nozzles arranged on opposite sides of said plane and extending obliquely downwards, as viewed in the drawing.
  • the manifold 13 also acts as a support for the lower end of guide rod 16 extending coaxially through the venturi 4, the upper end of said rod being secured to a support member or finger 17 extending radially from and supportedon the inner wall of an annular connector l8 connecting the upstream end of carburetor l to the air cleaner (not shown).
  • a generally bell-shaped throttle or metering element 19 is coaxially slidable on rod 16 and is urged by a calibrated spring 20 fitted on the rod between said element and the manifold 13 toward a normal or idling position resting against the support member 17.
  • the bell shape of the metering element 19 is flared in the direction of flow of intake air through the intake passageway 3, as indicated by the arrows at both ends of the carburetor l, and is of such axial length that, when in its normal or idling position against support member 17 and in which it is shown in the drawing, its maximum diameter is at an axial position or level between the two sets of passageways 9 and 10.
  • throttle valve 5 When throttle valve 5 is opened to cause air, in well-known manner, to be drawn into the carburetor 1 and through the intake passageway 3 including venturi 4, the flow or dynamic action of such air carries the metering ele ment l9 downwardly to an extent commensurate with the amount the throttle valve is opened, the maximum downward movement being to a maximum speed position against the manifold 13 and corresponding to the maximum rate of engine revolution.
  • the maximum speed position of metering element 19 being shown in broken outline in the drawing.
  • the impulse effected in chamber 7 would vary not only according to air speed flowing through venturi 4 but would also be affected by the position of metering element 19.
  • mixture of the fuel supply to the engine as effected by the impulse produced by only one set of passageways 9, would produce the curve A shown in FIG. 2 which indicates a relatively high content of carbon monoxide in the exhaust gases for lower engine speeds.
  • the signal impulse produced thereby produces a fuel mixture from which the curve B shown in FIG.
  • the metering element 19 occupies a range of positions in which a high degree of vacuum would be caused in the passageway 9, if no other passageways were provided, which vacuum alone would produce such an impulse as to effect an excessively enriched fuel mixture drawn by the engine. With the use of the additional sets of passageways 10 and 11, however, the degree of the impulse is reduced thereby to effect a more accureately blended fuel mixture. On the other hand, at higher engine speeds and loads, the metering element 19 occupies a range of positions such that, in the absence of passageways 11, the resulting vacuum impulse would be so weak as to effect an excessively thin blend of fuel mixture.
  • the vacuum impulse communicated to chamber 7 and, therefore, to connecting passageway 8 is related to a reference impulse or signal.
  • This reference impulse is obtained from an L-shaped passageway 21 formed adjacent the periphery of the annular connector 18, one branch of said passageway being formed parallel to an opening into the flow of intake air from the air cleaner (not shown), while the other branch leads to the exterior of said connector.
  • An idling mixture passageway or jet 22 formed in the wall of uniform-diameter portion 6 extends from the exterior and opens to the interior thereof slightly downstream of the throttle valve 5, which is shown in a closed position.
  • a progression passageway or jet 23 also formed in the wall of easing portion 6 extends from the exterior and opens to the interior thereof slightly upstream of throttle valve 5, when the latter is in its closed position, the interior region of said casing portion between said throttle valve and the manifold 13 being designated as a mixing chamber 24.
  • a drain passageway 25 is formed between one end of manifold 13 and the exterior of easing portion 6. The purpose of the passageways 22, 23, and 25 will be set forth hereinafter.
  • the fuel supply apparatus also comprises a fuel tank 26 from which fuel is drawn by a pump 27 and delivered through a pipe 28, in which said pump and a filter 29 are serially interposed, to a fluidic regulator or amplifier 30. Since the fluidic regulator 30 may be of conventioanl type, a detailed description thereofis not deemed necessary and therefore is shown diagrammaticaly.
  • the fluidic regulator 30 is provided with two control channels or input ports 31, 32 acting in opposition on a fuel stream flowing through a supply channel or port 33 extending through said regulator transversely to said control channels, the upper end of said supply channel, as viewed in the drawing, being connected to the portion of pipe 28 leading from filter 29.
  • part of the fuel flow in supply channel 33 is deflected into a branch channel or delivery port 34 which feeds manifold 13 through a pipe 35 interconnected therebe-' tween.
  • the remaining portion of the fuel flows back to tank 26 via a delivery channel or port 36 (continuing from supply channel 33) and a pipe 37 connected to the lower end of delivery channel 36, as viewed in the drawing.
  • Control channel 32 is connected via a pipe 38 to connecting passageway 8, so that the resultant vacuum impulse of the respective impulses transmitted from the sets of passageways 9, l0, and 11 to chamber 7 is thereby communicated to and effects the pressure in said control channel.
  • Control channel 31 is connected via a pipe 39 to the L-shaped passageway 21 in the connector 18 of the carburetor 1 and, therefore is affected by the reference impulse therefrom.
  • a three-way valve 40 is interposed in pipe 38 so that control channel 31 may be connected to reference passageway 21 either directly via pipe 39 only, or indirectly via a branch pipe 41 arranged in parallel relation to pipe 39 and in which branch pipe a calibrated choke 42 is interposed.
  • Pipe 37 leading from delivery channel 33 of the fluidic regulator 30 has a pipe 43 leading therefrom and commonly connecting to three branch pipes 44,45, and 46 connected with drain passageway 25, progression passageway 23 and idling passageway 22, respectively.
  • a calibrated choke 47 is interposed in pipe 43, and an adjustable choke 48 is interposed in branch pipe 46.
  • the branch pipe 44 allows fuel droplets forming at the opening of manifold 13 during engine idling to drain into branch pipe 46 leading to idling passageway 22.
  • Air for emulsifying or atomizing the fuel supplied to branch pipes 45 and 46 is provided via an air pipe 49 connecting said branch pipes and to pipe 39 leading from the reference passageway 21.
  • a branch conduit 50 also connects air pipe 49 with pipe 35 from branch channel 34 of the fluidic regulator 30 for atomizing fuel supply directed to manifold 13 through pupe 35.
  • control impulse in channel 32 of the regulator 30, to some degree is alsways negative, that is, a partial vacuum with respect to reference impulse in channel 31.
  • control impulse in channel 32 is accurately established for various engine speeds by automatic cooperation of the metering element 19 with the passageways 9, 10, and 11.
  • the inertia mass of the metering element 19 is precalculated so as to respond with a desired delay to sudden opening of the throttle valve 5.
  • the throttlevalve 5 is in its closed position, asshown in FIG. 1, and, therefore, in the absence of air flow in venturi 4, the respective control impulses in the control channels 31 and 32 of the regulator 30 are substantially balanced.
  • the progression passageway 23 also remains inactive due to lack of air flow through the carburetor intake passageway 3, only the idling passageway 22 supplies the engine with fuel (from pipe 43) and air (from pipe 49) in a quantity measured by the fixed choke 47 and the adjustable choke 48. Under such idling conditions, however, it is practically impossible to avoid a very small flow of fuel to channel 34 of the regulator 30, hence toward manifold 13 via pipe 35 which could cause idling instability. Such idling instability is avoided by draining off such fuel. via drain passageway 25 and pipe 44 into pipe 49 thence into pipe 46 at a point ahead of adjustable choke 48.
  • progression passageway 23 is activated by the resulting air flow there-past, while suction of fuel and air mixture from the idling passageway 22 is substantially reduced, although air flow through venturi 4, at this point is not powerful enough yet to provide adequate supply to manifold 13. It should be obvious, however, that with throttle valve 5 in its initial position, a substantial quantity of fuel and air mixture is drawn from progression passageway 23 and is sufficient for effect- 6 ing a smooth even progression of engine acceleration.
  • the metering element 19 occupies its maximum speed position indicated by the broken outline in the drawing, in which position, the central portion of the manifold 13 is screened off from air flowthrough intake passageway 3.
  • the two sets of nozzles 14 and 15 are located in manifold 13 so as to be clear of the central portion of said manifold screened off by metering element 19 and thereby exposed to the flow action of air intake at all positions of said metering element.
  • the manifold 13 is disposed transversely to the axis of intake passageway 3 to provide the most effective response to air flow action even with slight openings of throttle valve 5.
  • the metering element 19 is shown as being substantially bell shaped and the guide rod 16 as circular in cross-section, said metering element need not be limited to such shape.
  • the metering ele ment could be of elliptical or polygonal cross-section with a prismatic guide on the support rod which, if desired, might extend helically with a predetermined pitch equivalent to one-fourth or one-half of the amount of axial movement or stroke length of said met ering element.
  • a carburetron system for internal neurosciencemen engines comprising: i
  • an air intake conduit having an upstream end and a downstream end;
  • a throttle valve in said intake conduit adjacent the downstream end, said throttle valve having a closed position, in which air flow through the intake conduit iscut off, and being operable to an open position of varying degrees for increasing the amount of air flow proportionally with the degree to which the throttle valve is opened;
  • a fuel manifold having at least one nozzle thereon opening to said air intake conduit upstream of said throttle valve;
  • a fluidic regulator having a supply port for receiving fuel under pressure, a pair of delivery ports, and a pair of control pressure input ports;
  • first passage means communicating one of said delivery ports to said fuel manifold
  • pressure transmitting means for providing a pressure differential across said control pressure input ports for effecting delivery of fuel to said one delivery port in accordance with the degree of said pres sure differential
  • said pressure transmitting means including second passage means communicating one of said control pressure input ports to said air intake conduit adjacent said upstream end thereof for transmitting a first pressure impulse to said one input port,
  • said pressure transmitting means further including third passage means with one end opening to said air intake conduit intermediate said upstream end and said throttle valve for communicating said air intake conduit to the other of said input ports;
  • metering means coaxially operably disposed and biased to a normal position in said intake conduit relative to said one end of said third passage means and forming a constriction of air flow space therebetween to effect a second pressure impulse of a certain degree relative to said first impulse and transmitted via said third passage means to the other of said input ports for establishing a minimum pressure differential across the input ports, j. said metering means being yieldingly operable out of said normal position in response to air flow through the intake conduit and to an extent commensurate with the degree to which the throttle valve is opened for reducing said constriction and varying the degree of said second impulse accordingly.
  • a carburetion system as set forth in claim 1, wherein said air intake conduit is provided with a venturi intermediate said upstream and downstream ends, and said one end of said third passage means opens into said venturi at the samllest diameter of the venturi throat.
  • said third passage means comprises a plurality of angularly spaced passageways extending radially in a common plane passing through said smallest diameter of the venturi and perpendicular to the axis thereof, each of said passageways having one end opening to the interior of said air intake conduit with the other end thereof opening to a common annular chamber formed in the air intake conduit and communicated to the other of said input ports.
  • said third passage means further comprises second and third pluralities of angularly spaced passageways formed similarly to said tirst-mentioned plurality and disposed in respective common planes situated upstream and downstream of and parallel to said first-mentioned common plane, said passageways of said second and third pluralities also each having one end open to the throat region of said venturi with the other ends thereof opening to said annular chamber.
  • a carburetion system as set forth in claim 4, wherein said metering means comprises:
  • a carburetion system as set forth in claim 5, wherein said fuel manifold comprises a tubular element extending diametrically through'the air intake conduit downstream of the venturi and upstream of said throttle valve.
  • a carburetion system as set forth in claim 1, further characterized by:
  • an idling jet opening to said intake conduit downstream of the throttle valve and connected to said second passage means and, via choke means, to said one of said delivery ports, said idling jet being effective in the closed position of said throttle valve for supplying fuel mixture to the engine at a restricted rate;
  • a progression jet opening to said intake conduit upstream of the throttle valve and downstream of the fuel manifold and connected to said second passage means and to the other of said delivery ports, said progression jet being effective, immediately upon opening of the throttle valve, for providing an initial supply of fuel mixture to the engine pending supply via the fuel manifold.
  • a carburetion system as set forth in claim 7, further characterized by drain means formed adjacent one end of said fuel manifold and connected to said idling jet for draining fuel condensate from said manifold during idling operation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US00127153A 1970-04-24 1971-03-23 Carburetion system Expired - Lifetime US3751016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6841770 1970-04-24

Publications (1)

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US3751016A true US3751016A (en) 1973-08-07

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US00127153A Expired - Lifetime US3751016A (en) 1970-04-24 1971-03-23 Carburetion system

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US (1) US3751016A (enExample)
CA (1) CA933428A (enExample)
DE (1) DE2049091A1 (enExample)
FR (1) FR2092280A5 (enExample)
GB (1) GB1318955A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004959A1 (en) * 1985-02-13 1986-08-28 Ting Hui Tzeng Movable jet carburetor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396279A (en) * 1943-07-01 1946-03-12 Alfred B Metsger Carburetor arrangement
US2873958A (en) * 1957-04-08 1959-02-17 Gen Motors Corp Thermostatically controlled air bleed
US2908488A (en) * 1957-11-07 1959-10-13 Gen Motors Corp Variable venturi
US3265374A (en) * 1963-08-14 1966-08-09 Glenn R Morton Carburetor for internal combustion engines
US3281132A (en) * 1965-08-23 1966-10-25 Llewellyn T Barnes Carburetor
US3574346A (en) * 1968-08-21 1971-04-13 Bendix Corp Fuel system
US3589384A (en) * 1968-01-05 1971-06-29 Bosch Gmbh Robert Flow rate-responsive fuel mixture control device with servomechanism
US3655170A (en) * 1970-03-06 1972-04-11 Acf Ind Inc Fluidic carburetor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396279A (en) * 1943-07-01 1946-03-12 Alfred B Metsger Carburetor arrangement
US2873958A (en) * 1957-04-08 1959-02-17 Gen Motors Corp Thermostatically controlled air bleed
US2908488A (en) * 1957-11-07 1959-10-13 Gen Motors Corp Variable venturi
US3265374A (en) * 1963-08-14 1966-08-09 Glenn R Morton Carburetor for internal combustion engines
US3281132A (en) * 1965-08-23 1966-10-25 Llewellyn T Barnes Carburetor
US3589384A (en) * 1968-01-05 1971-06-29 Bosch Gmbh Robert Flow rate-responsive fuel mixture control device with servomechanism
US3574346A (en) * 1968-08-21 1971-04-13 Bendix Corp Fuel system
US3655170A (en) * 1970-03-06 1972-04-11 Acf Ind Inc Fluidic carburetor

Also Published As

Publication number Publication date
GB1318955A (en) 1973-05-31
CA933428A (en) 1973-09-11
FR2092280A5 (enExample) 1971-01-21
DE2049091A1 (de) 1971-11-11

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Date Code Title Description
AS Assignment

Owner name: CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), THE

Free format text: SECURITY INTEREST;ASSIGNOR:RAIL ACQUISITION CORP.;REEL/FRAME:005323/0831

Effective date: 19900309

AS Assignment

Owner name: WESTINGHOUSE AIR BRAKE COMPANY, AIR BRAKE AVENUE,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN STANDARD INC., A DE CORP.;REEL/FRAME:005648/0269

Effective date: 19900307