US3756748A - Valveless oscillating displacement pump - Google Patents

Valveless oscillating displacement pump Download PDF

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Publication number
US3756748A
US3756748A US00102342A US3756748DA US3756748A US 3756748 A US3756748 A US 3756748A US 00102342 A US00102342 A US 00102342A US 3756748D A US3756748D A US 3756748DA US 3756748 A US3756748 A US 3756748A
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United States
Prior art keywords
pump
diaphragms
set forth
chamber
duct
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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
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US00102342A
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English (en)
Inventor
E Thiele
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/20—Other positive-displacement pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F7/00—Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein

Definitions

  • a valveless oscillating displacement pump which comprises two chambers connected by a transfer duct and two displacing members which operate in phase opposition and one of which is disposed in the chamber which precedes the outlet of the transfer duct and the other in the chamber which succeeds the outlet of the transfer duct.
  • This invention relates to a valveless oscillating displacement pump which comprises a member which consists of a piston, diaphragm or the like and is oscillatable by preferably electromagnetic drive means, a transfer duct, which may taper, if desired, in the direction of flow, and a receiving duct, which is in register with the outlet of the transfer duct.
  • Valveless oscillating displacement pumps are known in which the valve action is utilized which is due to the fact that nozzles have different resistances to flow in different directions.
  • Those known pumps have a low noise and suffer wear owing to cavitation, which is ap-- preciable from about 2 meters water column when the pump discharges against atmospheric pressure.
  • the present invention relates to a valveless oscillating pump, in which cavitation occurs only from a relatively large total heat and which can be designed to resist acid without involving the disadvantagesset forth hereinbefore.
  • a displacement pump ' which is of the kind mentioned first hereinbefore and in which, in accordance with the invention, the oscillatable part consists of two displacing members which operate in phase opposition and one of which is disposed in the chamber which precedes the outlet of the transfer duct whereas the other is disposed in the chamber which succeeds the outlet of the transfer duct.
  • Both the transfer duct and the receiving duct may consist of nozzles.
  • FIG. 1 shows an embodiment of the pump comprising displacing pistons.
  • FIGS. 2 to 5 show embodiments of the pump comprising displacing diaphragms.
  • the basic concept of the displacement pump is shown in FIG. 1.
  • the pump comprises a housing 3, which is divided into two chambers l, 2 and provided with an inlet duct 4, which opens into chamber 1.
  • the two chambers l, 2 are connected by a jet nozzle 5, which tapers toward the chamber 1 and is in register with a receiving duct 6, which extends out of the chamber 1.
  • the displacing members consistof two single-acting pistons 9 and 8, which operate in phase opposition and are movable in cylinders 7, 10 connected to chambers l and 2, respectively.
  • This pump has the following mode of operation: As the piston 9 rises, liquid is sucked through the inlet 4 into the chamber 1 and at the same time the descending piston 8 transfers liquid from chamber2 through nozzle 5 into duct 6. During a movement of each of the pistons 9 and 8 in the opposite direction, the piston 8 sucks liquid into the chamber 2 and the piston 9 displaces-liquid from chamber 1 into chamber 2.
  • the displacing members consist of diaphragms 17 and 18 rather than of the pistons 9 and 8 described hereinbefore.
  • the diaphragm l8 seals the chamber 2 at the rear end of the transfer nozzle 5 so that said chamber is restricted to the interior of the nozzle.
  • Liquid-filled pipes 19 and 20 I non-magnetizable,
  • the displacement pump has concentric chambers l' and 2 and the diaphragms l7 and 18 are made in one piece, which is gripped between the head 3' of the pump and the housing member 3".
  • the diaphragms 17'and 18 are caused to oscillate in phase opposition by a piston 22, which is slidably mounted and reciprocates in a cylinder 33.
  • Thelatter is formed by the wall of the housing member 3" and has a small wall thickness and consists of preferably insulating material.
  • FIG. 4 Such an embodiment of the displacement pump is shownin FIG. 4, which differs from that of F IG. 3 in that the electric drive means 34 is disposed in the housing member 3" rather than being disposed outside the housing 3.
  • the piston 22 is hollow and its interior forms part of the chamber 120 which adjoins the diaphragm 18.
  • the piston 22 is movable on a hollow cylinder 133 and in a cylindrical section 133, which is coaxial with said hollow cylinder. The latter extends inwardly from the bottom of housing member 3" and communicates with chamber 120.
  • the hollow cylinder 133 of the displacement pump constitutes a damping means and for this purpose is closed toward the chamber 120 and open on the outside, where it is sealed by a screw 134 and an interposed gasket 135.
  • a ring 136 protrudes from the inside wall of the piston 22 and in the central position of the piston is in register with a recessed surface 137 of the hollow cylinder 133 so that two annular spaces 138 are defined between the cylinder 133 and the piston 22 and communicate with the interior of the cylinder'l33 through openings 139 in the wall of the latter and also communicate with chambers 119 and 120 through the clearances at the contacting surfaces of the piston.
  • the throttling can be controlled by the screw 134, which can be screwed inwardly to a greater or lesser extent so as to throttle the flow path leading into the lower annular chamber 138 to a greater or lesser extent so that the throttling of the flow of liquid in one direction or the other is increased or decreased.
  • the diaphragms 17, 18 are concentric as in the embodiments shown in FIGS. 3 and 4. Besides, the diaphragm 17, 18 is covered on the liquidcontacted side by a protective sheet 140, which may be replaceable and resists any chemicals to be handled. As is apparent from the drawing, the sheet is gripped between the diaphragm and the head 3' of the pump.
  • the two displacing members operating in phase opposition need not consist of pistons or diaphragms but may constitute bellows or two oppositely acting surfaces of one and the same displacing member or the like.
  • a combination of a piston and diaphragm or of a piston and bellows is also desirable, and it has proved advantageous to use a hydraulic liquid for a transmission of force.
  • a valveless pump which comprises a pump housing having wall means defining two chambers connected by a transfer duct comprising a jet nozzle, an inlet duct and an outlet duct opening into one of said chambers with said outlet duct in said wall means opposite and aligned with said jet nozzle, said outlet duct spaced relative to said jet nozzle to receive fluid directly therefrom, and means for displacing a liquid, said means comprising two reciprocable liquid displacing members which operate at high, speed in phase opposition and one of which is disposed in the chamber preceding the transfer duct and the other in the chamber succeeding the transfer duct.
  • a pump as set forth in claim 2 comprising an electric drive system at least partially in said housing for imparting a reciprocatory motion to a hydraulic liquid which serves to drive the diaphragms.
  • each diaphragm on that side thereof which is remote from the transfer duct sealingly adjoins a chamber and these chambers communicate with a piston adapted to perform reciprocatory motion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00102342A 1970-01-02 1970-12-29 Valveless oscillating displacement pump Expired - Lifetime US3756748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1270A AT291772B (de) 1970-01-02 1970-01-02 Ventillose, oszillierende Verdrängerpumpe

Publications (1)

Publication Number Publication Date
US3756748A true US3756748A (en) 1973-09-04

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ID=3479196

Family Applications (1)

Application Number Title Priority Date Filing Date
US00102342A Expired - Lifetime US3756748A (en) 1970-01-02 1970-12-29 Valveless oscillating displacement pump

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US (1) US3756748A (US08066781-20111129-C00013.png)
JP (1) JPS4842083B1 (US08066781-20111129-C00013.png)
AT (1) AT291772B (US08066781-20111129-C00013.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193986A (en) * 1992-01-06 1993-03-16 Grant Manufacturing Corporation Fluid pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61119559U (US08066781-20111129-C00013.png) * 1985-01-14 1986-07-28
JPS6294176U (US08066781-20111129-C00013.png) * 1986-11-24 1987-06-16

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204226A (en) * 1935-06-10 1940-06-11 Hoover Co Absorption refrigerating apparatus
GB780157A (en) * 1955-01-06 1957-07-31 Ford Motor Co Improvements in and relating to liquid pumps, particularly injectors
US2879144A (en) * 1955-07-01 1959-03-24 Thornton John Desmond Pumps
US3023708A (en) * 1957-06-14 1962-03-06 Thiele Ernst Valveless pump
AT222304B (de) * 1961-04-07 1962-07-10 Franz Krammer Wärmepumpe
US3289594A (en) * 1963-07-11 1966-12-06 Thiele Ernst Valveless pump for liquids

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204226A (en) * 1935-06-10 1940-06-11 Hoover Co Absorption refrigerating apparatus
GB780157A (en) * 1955-01-06 1957-07-31 Ford Motor Co Improvements in and relating to liquid pumps, particularly injectors
US2879144A (en) * 1955-07-01 1959-03-24 Thornton John Desmond Pumps
US3023708A (en) * 1957-06-14 1962-03-06 Thiele Ernst Valveless pump
AT222304B (de) * 1961-04-07 1962-07-10 Franz Krammer Wärmepumpe
US3289594A (en) * 1963-07-11 1966-12-06 Thiele Ernst Valveless pump for liquids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193986A (en) * 1992-01-06 1993-03-16 Grant Manufacturing Corporation Fluid pump

Also Published As

Publication number Publication date
JPS4842083B1 (US08066781-20111129-C00013.png) 1973-12-11
AT291772B (de) 1971-07-26

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