US2189526A - Double acting vacuum pump - Google Patents

Double acting vacuum pump Download PDF

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Publication number
US2189526A
US2189526A US198380A US19838038A US2189526A US 2189526 A US2189526 A US 2189526A US 198380 A US198380 A US 198380A US 19838038 A US19838038 A US 19838038A US 2189526 A US2189526 A US 2189526A
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United States
Prior art keywords
diaphragm
pump
chamber
valve
suction
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Expired - Lifetime
Application number
US198380A
Inventor
Abraham M Babitch
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Motors Liquidation Co
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Motors Liquidation Co
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Publication date
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Priority to US198380A priority Critical patent/US2189526A/en
Application granted granted Critical
Publication of US2189526A publication Critical patent/US2189526A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/12Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary
    • F02M59/14Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary of elastic-wall type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/14Feeding by means of driven pumps the pumps being combined with other apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/13Special devices for making an explosive mixture; Fuel pumps
    • F02M2700/1317Fuel pumpo for internal combustion engines
    • F02M2700/1323Controlled diaphragm type fuel pump

Definitions

  • FIG. 1 wardly after the completion .of the upward Figure 1 is a. view in vertical section of the movement which has been'given it by the me- 20 novel pump.
  • is ytherefore made to vibrate.
  • the top member is formed with an opening 59 in its outer wall. y ⁇ This top memberis castto form a socalled surge chamber or inlet. chamber g5. form. l 8
  • the drawing shows a combined fuel and sucscreen 63 which latter is heldin position by a tion pump.
  • the combined pump is made up of cap 65 and a screw 61.
  • Figure 3 is a section online 3--3 of Figure 1.
  • Figure 4 is a sectional detail of a modified diaphragm is lifted to create suction in a pump chamber beneath the diaphragm by means of a 'lever 2
  • The'body 1 and the top member together form the suction pump. Clamped betweenY these members 1 and is a flexible diaphragm 3
  • a metal disc 33 Above the diaphragm is a metal disc 33 and beneath the diaphragm is a disc 35, the discs being'attached to the diaphragmas usual.
  • a pocket 31 in the lower disc carriestherewithinthe head 39 of a diaphragm lstein 4I.
  • The'stem passes through any suitable seal I3 located in an mentioned opening is controlledv by a valve 1
  • Theoutlet valve from the second pump chamber is marked 15. ⁇ It disfl charges air-through an apertured baille .11 to the intermediate chamber 19 of thebody 1, this ⁇ being the chamber Voccupied by the pump y:operyating mechanism.
  • Chamber 13 is in communication with the engine casing* receivingthe lever 2
  • FIG. 1 the construction may be as shown in Figure 1 where the discharge from both pump chambers is into chamber 19. Should it be de sired to use the engine vacuum for normal operation of the vacuum operated accessory and to use the present invention as a booster, the expedient shown .by Figure 4 may be adopted.
  • the upper part of body i is formed with an outlet passage 81 instead of with the passage 85.
  • Passage 81 is in communication with a passage I9 in the lower wall of top il'.
  • Passage 89 communicates with a passage 9
  • the intake manifold be connected by a suitable conduit with outlet passage 81.
  • a valve 95 opens from passage 89 to passage 81.
  • valve 8l and the passages 83 and 85 may be omitted.
  • the suction of the manifold tends to open valve 95 and create suction in the upper pump chamber.
  • the suction in the upper pump chamber may operate through valve '66 to draw air through the surge chamber 6
  • a body In a double pump, a body, a top. a diaphragm clamped between said body and top,

Description

Feb. 6, 1940.' A M. BAB|TCH n 2,189,526
DOUBLE ACTING VACUUM PUMP Filed March 28. 1938 5 q To /NTAKE y y MAN/FOLD rwentor Pstenfedreb. s, 1940 l2,189,526 l l 2,189,526 l DOUBLE Acrn'm VACUUM PUMP Abraham. M. Bahnen, Flint, Mich., minori General Motors CorporatiomlDetroit, Mich.. 'a
corporation o! Delaware Application March 28, 1938, Serial No. 198,380 k3 Claims. ((Cl. 230-38) 'I'his invention relates to air. pumps and is inupper closure wall 46 of the body. Atthe lower` tended more particularly as an improvement in end of stem 4| it is engagedl by a lever extension the air or Vacuum pump constituting a part of or arm 41. This extension is adapted to be ena combined fuel and vacuum pump for use with gaged by a shoulder 49 of lever 2| .and to `be motor vehicles. the fuel pump being used to suprocked with the lever and Apushed.` upwardly I ply the engine from the fuel reservoir, and the against the diaphragmvstem when thecam l23 suction pump being intended to actua'te a. vehicle 1 rocks the lever 2|. It will thus be seen that this' accessorysuch as the motor of a windshield lever 2| serves to produce: vibrating movements cleaner. l in both diaphragms |3 and 3|. Under the inl 'I'he primary object of the invention is to uence of aspringil engaginglthe body 1 anda l0 utilize both sides of a vibrating pump diaphragm part 53'which 'latter also engages thev lever, the Y as pump chambers whereby a lesser diaphragm lever is held against the cam 23. The'upward stroke produces the required suction. movement of the diaphragm 3| energizes a' spring More specically the inventive idea contem- 55. The spring 55 is seated within the upper endY plates but minor changes from prior pumps to l of a recess 51 formed in the` diecast top meml5 accomplish the above stated major object. y ber Il. At its lower endthis spring engages the.
Other objects and advantages will be underdiaphragm. plate 33. W'hen so energized thev stood from the following description; spring is available to move the diaphragmdownf UNITEDSTATBS *Pm-1wfil-ritmif.-
In the drawing: wardly after the completion .of the upward Figure 1 is a. view in vertical section of the movement which has been'given it by the me- 20 novel pump. chanical means associated with the cam. The 1 diaphragm 3| is ytherefore made to vibrate. The top member is formed with an opening 59 in its outer wall. y `This top memberis castto form a socalled surge chamber or inlet. chamber g5. form. l 8|. -This chamber is locatedl beneatha. ilter The drawing shows a combined fuel and sucscreen 63 which latter is heldin position by a tion pump. The combined pump is made up of cap 65 and a screw 61. Access to the surge cham; three die castings of which the intermediate or ber from the opening, 591s' afforded only'through' l body part is marked 1. `To the body 1 is secured the screen 63l -asgis 'shown by the arrows. in 30 k -a bottom part 9 and an upper casting No Figure 1. From the surge'chambera valve 66 of novelty is herein claimed for the fuel pump conventional lform admits air to the chambermechanism. Since pumps of this kind are above the diaphragm@ This valve may be held in well known it need be only briey described. position by screws 66 as shown in Figure 3.v $5 There is a flexible diaphragm I3 clamped be- Alsofrom the surge chamber a'passage 69 leads yu, `tween parts 1 and 9 by cap screws I5. 'I'he to an opening inthe lower surface ofv top member j usual lter cup for the fuel is marked |1 l I, this opening registering with `a. corresponding and at I9 is designated an inlet opening. The' opening in-the top portion of-body-j1.l -The last i Figure 2 is a top rplan view, the cover being partly broken away.
Figure 3 is a section online 3--3 of Figure 1.
Figure 4 is a sectional detail of a modified diaphragm is lifted to create suction in a pump chamber beneath the diaphragm by means of a 'lever 2| rocked by an engine cam.,23, the lever acting through the instrumentality of a link 25 attached to the diaphragm stem 21. 'The action. of the lever and the link 25A energizes a spring 29 which produces the'discharge stroke after the completion of the suction stroke.
The'body 1 and the top member together form the suction pump. Clamped betweenY these members 1 and is a flexible diaphragm 3|.
Above the diaphragm is a metal disc 33 and beneath the diaphragm is a disc 35, the discs being'attached to the diaphragmas usual. A pocket 31 in the lower disc carriestherewithinthe head 39 of a diaphragm lstein 4I. The'stem passes through any suitable seal I3 located in an mentioned opening is controlledv by a valve 1|, the valve 1| together with a bore 13 admitting air to' the second pump chamber, thechamber beneath the diaphragm.l Theoutlet valve from the second pump chamber is marked 15.` It disfl charges air-through an apertured baille .11 to the intermediate chamber 19 of thebody 1, this `being the chamber Voccupied by the pump y:operyating mechanism. Chamber 13 is in communication with the engine casing* receivingthe lever 2| andhousing the cam 23. From the upper pump chamber a valve 8| discharges into a slop- 50 ing passage. which--togetherwith a registering l passage 36 intheltop of body 11 also communichamber'l 'and with the engine lcasing. A'
dates with By me immun abovedesnbedtne `ammtude of vibration of the diaphragm is materially reduced because of the vacuum condition preveiling in one chamber or the other and resisting the diaphragm movement. It will be obvious that because of the use of the space on both sides of the diaphragm as pump chambers there is an effective displacement equal to twice that existing in the case of a single acting diaphragm pump. In the event that the accessory Ydevice to be operated is a windshield cleaner, a conduit from Ythe suction motor of the cleaner will be connected to inlet opening 59.
In practice the construction may be as shown in Figure 1 where the discharge from both pump chambers is into chamber 19. Should it be de sired to use the engine vacuum for normal operation of the vacuum operated accessory and to use the present invention as a booster, the expedient shown .by Figure 4 may be adopted. Here the upper part of body i is formed with an outlet passage 81 instead of with the passage 85. Passage 81 is in communication with a passage I9 in the lower wall of top il'. Passage 89 communicates with a passage 9| plugged as at 93 and leading into the upper pump chamber above the diaphragm 3l. In this form of the invention it is intended that the intake manifold be connected by a suitable conduit with outlet passage 81. A valve 95 opens from passage 89 to passage 81. In this form of the invention valve 8l and the passages 83 and 85 may be omitted. The suction of the manifold tends to open valve 95 and create suction in the upper pump chamber. The suction in the upper pump chamber may operate through valve '66 to draw air through the surge chamber 6|, and through opening 59 and thereby from the windshield cleaner motor. If the engine suction issuicient it may lift diaphragm 3l against the tensionv of spring 55 to such an extent that no movement is imparted to the diaphragm by the lever 2|. Under these circumstances the windshield wiper motor is actuated solely by manifold suction. In the event of failure of manifold suction the spring and the lever 2| at once operate the diaphragm and suction is available for operating the engine accessory.
I claim:
. 1.v In a double pump, a body, a top. a diaphragm clamped between said body and top,
means constituting rigid parts of said body and top to form, together with said diaphragm, upper and lower pump chambers, an inlet valve and an outlet valve in each of saidA body and top to communicate with each of the respective pump chambers, an inlet chamber in the top communicating with the inlet valve of the upper pump chamber, registering passages in the top and body whereby the inlet chamber communicates with the inlet valve of the lower pump chamber, an outlet chamber in the body communicating with the outlet valve of the lower pump chamber and otherV registering passages in the top and body whereby the outlet valve of the upper pump chamber communicates with said outlet chamber, said inlet chamber adapted to be connected to a suction operated accessory and said outlet chamber adapted to be connected to the atmosphere.
2. The invention defined by claim 1, together with an apertured wall forming a baffle within said outlet chamber through which baille the discharged gas from the lower pump chamber passes to prevent the transmission of valve noise.
3. The invention defined by claim 1, said diaphragm being apertured in registration with said registering passages of the top and body.
ABRAHAM M. BABITCH.
US198380A 1938-03-28 1938-03-28 Double acting vacuum pump Expired - Lifetime US2189526A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798662A (en) * 1952-12-26 1957-07-09 Gen Motors Corp Vacuum pump drive
US2978990A (en) * 1956-05-03 1961-04-11 George W Lewis Fluid pumps
US3006535A (en) * 1954-03-05 1961-10-31 Acf Ind Inc Suction booster
US3035676A (en) * 1957-02-28 1962-05-22 Daimler Benz Ag Clutch actuating mechanism
US3045896A (en) * 1959-11-12 1962-07-24 Acf Ind Inc Pump
DE1162133B (en) * 1958-06-30 1964-01-30 Acf Ind Inc Combined fuel vacuum booster pump for use in connection with automotive engines
US3149777A (en) * 1961-04-03 1964-09-22 Thompson Ramo Wooldridge Inc Low pressure rotary valve diaphragm air pump
US3151568A (en) * 1961-07-26 1964-10-06 Gen Motors Corp Diaphragm pump of minimum displacement loss
US3163355A (en) * 1958-06-30 1964-12-29 Acf Ind Inc Fuel pump
US3954352A (en) * 1972-11-13 1976-05-04 Toyota Jidosha Kogyo Kabushiki Kaisha Diaphragm vacuum pump
WO2018098505A1 (en) * 2016-11-28 2018-05-31 Massachusetts Institute Of Technology Vacuum pumps and methods of manufacturing the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798662A (en) * 1952-12-26 1957-07-09 Gen Motors Corp Vacuum pump drive
US3006535A (en) * 1954-03-05 1961-10-31 Acf Ind Inc Suction booster
US2978990A (en) * 1956-05-03 1961-04-11 George W Lewis Fluid pumps
US3035676A (en) * 1957-02-28 1962-05-22 Daimler Benz Ag Clutch actuating mechanism
DE1162133B (en) * 1958-06-30 1964-01-30 Acf Ind Inc Combined fuel vacuum booster pump for use in connection with automotive engines
US3163355A (en) * 1958-06-30 1964-12-29 Acf Ind Inc Fuel pump
US3045896A (en) * 1959-11-12 1962-07-24 Acf Ind Inc Pump
US3149777A (en) * 1961-04-03 1964-09-22 Thompson Ramo Wooldridge Inc Low pressure rotary valve diaphragm air pump
US3151568A (en) * 1961-07-26 1964-10-06 Gen Motors Corp Diaphragm pump of minimum displacement loss
US3954352A (en) * 1972-11-13 1976-05-04 Toyota Jidosha Kogyo Kabushiki Kaisha Diaphragm vacuum pump
WO2018098505A1 (en) * 2016-11-28 2018-05-31 Massachusetts Institute Of Technology Vacuum pumps and methods of manufacturing the same
US11009020B2 (en) 2016-11-28 2021-05-18 Massachusetts Institute Of Technology Vacuum pumps and methods of manufacturing the same

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