US3320900A - Fuel pump - Google Patents

Fuel pump Download PDF

Info

Publication number
US3320900A
US3320900A US424859A US42485965A US3320900A US 3320900 A US3320900 A US 3320900A US 424859 A US424859 A US 424859A US 42485965 A US42485965 A US 42485965A US 3320900 A US3320900 A US 3320900A
Authority
US
United States
Prior art keywords
valve
fuel
chamber
cap
pump
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
US424859A
Other languages
English (en)
Inventor
Johnson Dolores
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.)
ACF Industries Inc
Original Assignee
ACF Industries Inc
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 ACF Industries Inc filed Critical ACF Industries Inc
Priority to US424859A priority Critical patent/US3320900A/en
Priority to GB54442/65A priority patent/GB1077250A/en
Priority to DE19651475921 priority patent/DE1475921B1/de
Priority to SE00255/66A priority patent/SE340925B/xx
Priority to FR45382A priority patent/FR1469244A/fr
Application granted granted Critical
Publication of US3320900A publication Critical patent/US3320900A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
    • F02M17/02—Floatless carburettors
    • F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
    • 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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • 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
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/438—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters
    • F02M2700/4388—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump
    • F02M2700/439—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump the pump being a membrane pump
    • 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
    • Y10S261/68—Diaphragm-controlled inlet 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
    • Y10T137/7504—Removable valve head and seat unit
    • Y10T137/7559—Pump type

Definitions

  • the fuel pump may be adjacent to and built in the same housing or body as the carburetor and both the fuel pump and carburetor are expected to operate in all attitudes and under widely varying operating conditions.
  • Minimum size and weight are required of all parts and they must also be responsive to sudden changes in operating conditions, such as from high speed to idle speed.
  • the cost of making and assembling the parts must be held to a minimum and the number of parts manufactured for a particular fuel pump should be reduced as much as possible. if feasible, one part should be constructed for use in more than one location or perform multiple functions, thereby reducing the total number of separate parts required or extending production runs to the extent that more economical manufacturing operations are achieved.
  • FIG. 1 is a view in elevation of a combination carburetor and fuel pump connected to the manifold of a gasoline and incorporating the fuel pump and novel check valve of this invention;
  • FIG. 2 is an enlarged cross section through the carburetor and fuel pump of FIG. 1;
  • FIG. 3 is an enlarged cross section of a portion of the carburetor of FIG. 1 showing the low speed or idle fuel ssytem;
  • FIG. 4 is an enlarged cross section of a check valve of this invention used for both the intake and discharge check valves in the fuel pump.
  • FIG. 5 is an enlarged partial top plan view of the valve body of FIG. 4.
  • a combination carburetor and fuel pump is indicated in its entirety by the reference numeral 1 and is particularly adapted for use with engines of power saws, small tools or the like which are intended to be operated in various attitudes or positions and where size and weight considerations are important.
  • the carburetor 1 includes a body casting 3 and a cap 5.
  • the body of the carburetor has an air and fuel mixture passage 7. Air is received at the inlet 3,32%,9dll- Patented May 23, 1967 or right end of the passage 7 as viewed in FIG. 1 and the outlet or left end of the passage 7 is in communication with the intake manifold M of an engine E.
  • Mounted within the conduit or passage 7 is a choke valve 9 and a throttle valve 11.
  • Cap 5 has an intake cavity 15 and a discharge cavity 17 which are in comunication with a chamber 19 formed in body 3 and cap 5.
  • Fuel pump 13 has an intake check valve 21 and a discharge check valve 23 for controlling admission of fuel to chamber 19 and discharge of fuel from chamber 19.
  • a fitting or nipple 25 is connected to cap 5 for connection through a fuel line 26 to a source of fuel as tank T, shown schematically in FIG. 2.
  • Fuel is supplied through nipple 25 to intake cavity 15 and through intake check valve 21 to chamber 19, and subsequently the fuel is passed to discharge cavity 17.
  • Fuel flows from the cavity 17 to a chamber 27 leading to a conduit or passage 29 in the body 3.
  • a carburetor fuel inlet valve 31 At the lower end of conduit or passage 29 is a carburetor fuel inlet valve 31 to regulate passage of fuel from conduit 29 to a chamber 33 in the carburetor.
  • Within chamber 33 is a diaphragm 35 fixed to a backing plate 36 having a button 37 engaging an arm 39 connected to the valve 31 to operate the valve 31.
  • an idle port 43 FIG. 3, is provided and fuel from chamber 33 flows through passage 44 to port 43 and to passage 7 when the engine is idling and in the well-known manner.
  • Adjusting screw 45 regulates the amount of fuel that is provided from the chamber 33 to the port or opening 43.
  • the fuel pump 13 of this invention includes a diaphragm 47 which is positioned across chamber 19 and divides the chamber into a pump chamber 49 and a pulsation chamber 51. Diaphragm 47 is held in place by bolts 50 which also hold cap 5 on base 3. The pulsation chamber 51 is connected by a passageway 52 to the crankcase at manifold M of the engine, so that pulsations in the crankcase cause the diaphragm 47 to be flexed or pulsed. Flexing of diaphragm 47 alternately increases and decreases pressure in pump chamber 49.
  • the check valves 21 and 23 of this invention are preferably of the same construction and FIG. 4 is an enlarged cross section of the check valve 21.
  • the valve 21 includes a valve seat 53 constituted by a sheet metal stamping which has a generally cylindrical tubular boss 55, with an inturned shoulder or flange 57 extending radially inwardly at the outer end of the boss 55 (its lower end as shown in FIG. 4).
  • the seat has a body portion 59 which extends outwardly from the boss 55 in a generally radial direction and is located at the end of boss 55 opposite from the internal shoulder 57.
  • the body 59 is dished on a portion of one surface thereof to provide a concave recess 61 having annular ribs 63 and 65 at the outer and inner edges thereof, respectively.
  • the body 59 has a multiplicity or ports 67 arranged in a circle between the ribs 63 and 65.
  • An annular rim 69 is located at the radially outer edge of one surface of the body 59 of the valve seat 53, this rim being substantially coaxial with boss 55 and extending axially from the one surface of the body 59 of the seat 53.
  • the outermost edge of the rim '69 preferably tapers to a narrow edge for engagement with a seat or gasket as explained hereinafter.
  • a narrow annular land 71 projects from the other surface of the body 59 of the seat 53, this land 71 being positioned radially inwardly a slight distance from the rim 69 and spaced radially outwardly from the boss 55.
  • the land 71 is engageahle with a seal or gasket as explained hereinafter when mounting the valve 21 on the cap 5.
  • a valve stop member 73 constituted by a sheet metal stamping has a generally cylindrical stem 75 which is axially longer than the boss 55. Stem 75 is telescoped into the boss 55 with the end of the stem engaging the flange 57.
  • the valve stop 73 has an annular recess 77 in the lower surface thereof, that is, the surface that faces the body portion 59 of the seat 53.
  • Valve stop 73 has a plurality of holes or openings 79 through the recess 77.
  • the recess 77 is generally coaxial with the stem 75 and is general-1y aligned with the concave surface 61 on the valve seat 53.
  • a flat surface 81 surrounding the stem 75. This surface 81 is adapted to be engaged by the head of a mounting bolt or by a projection on the pump body when the valve 21 is mounted.
  • a flexible valve-closing member 83 is positioned around the stem 75 of the stop 73.
  • This valve member 83 is constituted by a disk of a flexible rubber or rubber-like material, including synthetic rubbers or other flexible materials which are fuel resistant.
  • Disk 83 extends radially outwardly from the stem 75 and portions of one surface of the disk are engageable with the annular ribs or ridges 63 and 65 bounding the annular recess 61 thereby to close the ports 67 against passage of fuel.
  • Disk 83 is biased toward closed posit-ion by a light coil spring 85 which has one end engaging the disk and its other end seated in the recess 77 of the valve stop 73.
  • the stated one end of the spring 85 engages the surface of the disk 83 directly opposite from the recess 61 and ports 67 intermediate the ribs 63 and 65, and presses the disk 83 into seating engagement with the ribs 63 and 65.
  • Fluid forced upward through the ports 67 from the bottom of the valve seat moves the disk 83 toward valve stop 73 to open the valve for the passage of the fuel from the bottom of the valve as illustrated in FIG. 4 to the top of the valve.
  • the disk 83 may engage the valve stop member 73 on both sides of the recess 77 and, should such engagement occur, the holes or ports 79 prevent adherence of the valve closing member 83 to the valve stop. Since the coil spring 85 is light, very little fluid pressure is required to unseat the valve disk 83.
  • the intake check valve 21 is mounted on the cap of the pump body by a mounting screw 87.
  • the shank portion of the mounting screw 87 passes through the hollow stem 75 and the annular shoulder 57 of the seat 53 and is threaded into a tapped hole in the cap 5 adjacent the intake cavity 15.
  • the head of screw 87 engages surface 81 on valve stop 73.
  • An annular shoulder 89 is formed in the cap 5 around the cavity 15 and a gasket or seal 91 is positioned on the shoulder 89.
  • the land 71 of intake check valve 21 engages the seal or gasket 91. Tightening of screw 87 places the land 71 in sealing engagement with the gasket or seal 91 and simultaneously places the flange 57 of the valve seat in engagement with a relieved surface 93 in cap 5.
  • valve seat 53 is firmly engaged with the cap 5 both at the boss portion and at the outer edge thereof.
  • This positive stop arrangement limits total deflection of the valve seat 53.
  • the flat port-ion 59 of the valve seat is substantially in the position illustrated in FIG. 4 when the screw 87 is tightly fastened to the cap 5 and as a result the valve disk 83 is placed in engagement with both of the annular ribs 63 and '65 by spring 85 to close the ports 67.
  • valve seat 53 With the valve 21 mounted as shown in FIG. 2, the valve seat 53 is positioned between cavity 15 and pump chamber 49. The only communication between cavity 15 and pump chamber 49 is through ports 67.
  • the check valve 23 is identical in construction with check valve 21 and is mounted in an inverted position relative to valve 21.
  • An annular shoulder 95 is provided in the cap 5 around the discharge cavity 17.
  • a seal or gasket 97 is positioned on the annular shoulder 95 and the outermost edge of rim 69 of the check valve 23 is placed in engagement with the gasket or seal 97.
  • a mounting screw 99 is used to mount the check valve 23 on the cap 5 and the shank of the screw 99 passes through the annular shoulder 57 and the boss 55 of the valve seat and through the hollow stem 75 of the valve stop and is threaded into a tapped hole in the cap 5.
  • the head of the screw 99 engages the flange 57 of the valve seat 53 and holds surface 81 of stop 73 in engagement with a surface 101 on cap 5.
  • the surface 101 is annular and dimensioned so that the projection on the valve stop '73 resulting from formation of the recess 77 will not engage the cap 5.
  • the seat 53 of the discharge check valve 23 is also positively located in the cap 5 so that little or no deflection of the valve seat occurs. It will be observed from FIG. 2 that the shoulder 95 is nearer the top of the cap than is the shoulder 89 and as a result the heads of screws 87 and 99 are substantially coplanar and are out of the way of the diaphragm 47.
  • pulse chamber 51 is responsive to pulsations in the crankcase of the engine.
  • the diaphragm 47 is moved upwardly and downwardly in the chamber 19.
  • a suction is created in the pumping chamber 49 which moves the disk 83 of the intake check valve 21 downward against the pressure of the spring and as a result the ports 67 of the check valve 21 are opened and fuel in cavity 15 is drawn into the pumping chamber 49.
  • the discharge check valve 23 is closed when the diaphragm 47 moves downwardly as viewed in FIG. 2 to result in a suction in the pumping chamber 49, the suction together with the spring 85 of the discharge check valve 23 moving the disk 83 into engagement with the valve seat 53 to thereby close the ports 67 to the passage of fuel.
  • a cavity 103 is formed in base 3 and separated from cavity 27 by diaphragm 47. Diaphragm 47 may flex into cavity 163 when fluid pres sure increases in cavity 27.
  • the construction of the check valve 21 and 23 together with the manner in which the valve seats 53 are mounted in the cap 5 of the pump body results in little or no deflection of the valve seats relative to the cap when they are mounted to the cap.
  • the mounting screw 87 of the inlet valve 21 can only force stem 75 against flange 57 and that in turn against cap surface 93. Parts are so dimensioned that annular land 71 simultaneously seals against gasket 91. Any further forcing of screw 87 cannot move land 71 against the cap as cap surface 93 is a stop for flange 57.
  • the body 59 of the valve seat cannot be forced out of its substantially planar configuration. This then, results in the valve member 85 making sealing contact with the annular ribs 63 and 65.
  • valve members 83 will operate efiectively in either arrangement of the valve and positive sealing action is obtained by the valve member 83 at all times.
  • valves 21 and 23 By using a very light coil spring 85 to oppose the fluid pressure for opening the valves 21 and 23, the valves are quickly responsive to small pressure changes and are thus quickly responsive to changes in engine operation.
  • the stem 75 of the valve stop 73 need not be press-fitted in the boss 55 of the valve seat 53 as in some prior art valves, thereby reducing tolerance requirements and reducing the cost of producing the cost of producing the valves.
  • a fuel pump having a pump body, the body having a chamber and an intake-cavity and a discharge cavity in communication with the chamber the, pump body having a first annular shoulder surrounding the intake cavity and a second annular shoulder surrounding the discharge cavity said shoulders having substantially equal diameters, an intake check valve, said check valve comprising a valve seat having a tubular boss with a shoulder therein and an annular rim at the outer periphery of the periphery of the seat, said valve seat having a port therein between said boss and said rim, said valve having a valve stop member having a stem positioned in said boss, said valve having a flexible valve-closing member positioned around said stem and positionable on said seat to close said port, said valve having a spring engaging said flexible member to urge said flexible members to a position to close said port, said intake valve being mounted on said pump body with said boss engaging said pump body and with said seat having a sealing connection with said first annular shoulder around said intake cavity, said valve being opened by suction in said chamber and closed by pressure in said
  • said fuel pump includes two mounting screws passing through said tubular stems of said respective valves and mounted in said pump body to position said valves body with said valves seats in engagement with said gaskets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
US424859A 1965-01-11 1965-01-11 Fuel pump Expired - Lifetime US3320900A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US424859A US3320900A (en) 1965-01-11 1965-01-11 Fuel pump
GB54442/65A GB1077250A (en) 1965-01-11 1965-12-22 Fuel pump
DE19651475921 DE1475921B1 (de) 1965-01-11 1965-12-31 Rueckschlagventil als Saug- bzw. Druckventil einerBrennstoffpumpe und mit zwei Rueckschlagventilen identischer Konstruktion versehene Brennstoffpumpe
SE00255/66A SE340925B (instruction) 1965-01-11 1966-01-10
FR45382A FR1469244A (fr) 1965-01-11 1966-01-10 Perfectionnements aux ensembles carburateur-pompe pour outils portatifs à moteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US424859A US3320900A (en) 1965-01-11 1965-01-11 Fuel pump

Publications (1)

Publication Number Publication Date
US3320900A true US3320900A (en) 1967-05-23

Family

ID=23684172

Family Applications (1)

Application Number Title Priority Date Filing Date
US424859A Expired - Lifetime US3320900A (en) 1965-01-11 1965-01-11 Fuel pump

Country Status (5)

Country Link
US (1) US3320900A (instruction)
DE (1) DE1475921B1 (instruction)
FR (1) FR1469244A (instruction)
GB (1) GB1077250A (instruction)
SE (1) SE340925B (instruction)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462073A (en) * 1966-12-15 1969-08-19 Peters & Russell Inc Air compressor
US3601102A (en) * 1970-01-16 1971-08-24 Walbro Corp Vibration-responsive fuel supplement valve
US3610273A (en) * 1969-03-13 1971-10-05 Peters & Russel Inc Compressor or like intake valve
US20080230733A1 (en) * 2007-03-22 2008-09-25 Bernhard Spiegl Automatic suction and pressure valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10064519B4 (de) * 2000-12-22 2014-11-06 Andreas Stihl Ag & Co. Membranvergaser für eine Brennkraftmaschine

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US674819A (en) * 1899-09-09 1901-05-21 Geo F Blake Mfg Company Direct-acting air-pump.
US1129072A (en) * 1914-01-24 1915-02-23 Charles A Conn Pump-valve.
GB187188A (en) * 1921-07-07 1922-10-09 Lentz Lokomotiv Umbau Aktien G Method of producing thin-walled valves for steam engines
US1480287A (en) * 1921-11-25 1924-01-08 Frank M Morton Removable check valve
US1599899A (en) * 1923-09-26 1926-09-14 Delco Light Co Diaphragm pump
US1684932A (en) * 1928-09-18 weatherhead
US1728788A (en) * 1926-12-07 1929-09-17 Monarch Engineering Company Division plate for pumps
US1768844A (en) * 1922-04-10 1930-07-01 Sullivan Machinery Co Valve
US1973103A (en) * 1932-06-06 1934-09-11 Copeland Refrigeration Corp Refrigerant compressor valve
US2076665A (en) * 1934-02-28 1937-04-13 Sullivan Machinery Co Composite valve and method of making the same
US2803265A (en) * 1951-07-23 1957-08-20 Acf Ind Inc Check valve device
GB921116A (en) * 1961-01-13 1963-03-13 Gen Motors Ltd Improvements in and relating to liquid pressure relief valves
US3146194A (en) * 1961-10-25 1964-08-25 Walker Mfg Co Filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191327046A (en) * 1912-12-20 1914-04-02 Georg Niemeyer Improvements in or relating to Valves.
US2622842A (en) * 1944-05-18 1952-12-23 Carter Carburetor Corp Valve device
DE809501C (de) * 1949-07-21 1951-07-30 Miag Vertriebs Gmbh Ventilplatte
US2905188A (en) * 1952-04-11 1959-09-22 Acf Ind Inc Check valve
US2810397A (en) * 1955-11-17 1957-10-22 Line Scale Company Inc Nylon pump valve with spring retainer

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684932A (en) * 1928-09-18 weatherhead
US674819A (en) * 1899-09-09 1901-05-21 Geo F Blake Mfg Company Direct-acting air-pump.
US1129072A (en) * 1914-01-24 1915-02-23 Charles A Conn Pump-valve.
GB187188A (en) * 1921-07-07 1922-10-09 Lentz Lokomotiv Umbau Aktien G Method of producing thin-walled valves for steam engines
US1480287A (en) * 1921-11-25 1924-01-08 Frank M Morton Removable check valve
US1768844A (en) * 1922-04-10 1930-07-01 Sullivan Machinery Co Valve
US1599899A (en) * 1923-09-26 1926-09-14 Delco Light Co Diaphragm pump
US1728788A (en) * 1926-12-07 1929-09-17 Monarch Engineering Company Division plate for pumps
US1973103A (en) * 1932-06-06 1934-09-11 Copeland Refrigeration Corp Refrigerant compressor valve
US2076665A (en) * 1934-02-28 1937-04-13 Sullivan Machinery Co Composite valve and method of making the same
US2803265A (en) * 1951-07-23 1957-08-20 Acf Ind Inc Check valve device
GB921116A (en) * 1961-01-13 1963-03-13 Gen Motors Ltd Improvements in and relating to liquid pressure relief valves
US3146194A (en) * 1961-10-25 1964-08-25 Walker Mfg Co Filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462073A (en) * 1966-12-15 1969-08-19 Peters & Russell Inc Air compressor
US3610273A (en) * 1969-03-13 1971-10-05 Peters & Russel Inc Compressor or like intake valve
US3601102A (en) * 1970-01-16 1971-08-24 Walbro Corp Vibration-responsive fuel supplement valve
US20080230733A1 (en) * 2007-03-22 2008-09-25 Bernhard Spiegl Automatic suction and pressure valve
US8281805B2 (en) * 2007-03-22 2012-10-09 Hoerbiger Kompressortechnik Holding Gmbh Automatic suction and pressure valve

Also Published As

Publication number Publication date
GB1077250A (en) 1967-07-26
DE1475921B1 (de) 1970-06-04
FR1469244A (fr) 1967-02-10
SE340925B (instruction) 1971-12-06

Similar Documents

Publication Publication Date Title
US5507318A (en) Umbrella check valves
US6533254B1 (en) Carburetor fuel pump
US6019075A (en) Air and fuel delivery system for fuel injected engines
EP0247276B1 (en) Carburation system for an internal combustion engine
US20030062633A1 (en) Carburetor fuel priming pump with integral fuel bowl drain
US2542254A (en) Flexible valve member
US3320900A (en) Fuel pump
US3045605A (en) Fuel feeding means
JP2003097353A (ja) 気化器
US3150601A (en) Mechanical pump
US6928996B2 (en) Stratified scavenging mechanism of a two-stroke engine
US3263701A (en) Valve structure
US6446611B2 (en) Pulsation type diaphragm pump
US3179055A (en) Fuel pump
US3967606A (en) Fuel pump for internal combustion engines
US4180042A (en) Fuel-air mixture regulator for internal combustion engines
US3923425A (en) Fuel pump shut-off valve
US20190024613A1 (en) Main fuel jet and nozzle assembly for a carburetor
US3238886A (en) Fuel pump
US2987303A (en) Internal combustion engine and fuel system therefor
US3368495A (en) Fuel feed system and fuel pump
US20030047818A1 (en) Fuel metering assembly for a diaphragm-type carburetor
KR970006863A (ko) 연료 펌프
US3169154A (en) Carburetor
GB2178800A (en) Fuel/oil pump