EP0093691A1 - Pompe à piston pour liquides - Google Patents

Pompe à piston pour liquides Download PDF

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Publication number
EP0093691A1
EP0093691A1 EP83810165A EP83810165A EP0093691A1 EP 0093691 A1 EP0093691 A1 EP 0093691A1 EP 83810165 A EP83810165 A EP 83810165A EP 83810165 A EP83810165 A EP 83810165A EP 0093691 A1 EP0093691 A1 EP 0093691A1
Authority
EP
European Patent Office
Prior art keywords
piston
cover
cylinder
during
stroke
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.)
Granted
Application number
EP83810165A
Other languages
German (de)
English (en)
Other versions
EP0093691B1 (fr
Inventor
Kurt Stauffer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT83810165T priority Critical patent/ATE17158T1/de
Publication of EP0093691A1 publication Critical patent/EP0093691A1/fr
Application granted granted Critical
Publication of EP0093691B1 publication Critical patent/EP0093691B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/122—Valves; Arrangement of valves arranged in or on pistons the piston being free-floating, e.g. the valve being formed between the actuating rod and the piston

Definitions

  • the invention is based on a piston pump for liquids, with a cylinder, in which a piston with a piston rod is arranged to be able to move back and forth, by means of which back and forth movement the liquid is sucked in via an inlet into the working space of the cylinder and out of the working space an outlet is pushed.
  • the piston pumps of this type are equipped with suction and pressure valves. During the suction stroke of the piston, the liquid is sucked into the working chamber of the cylinder through the suction valve, during the pressure stroke the suction valve closes and the liquid is pressed out of the cylinder working chamber through the pressure valve that is opened into a pressure line.
  • the manufacture of such valves increases the price of the piston pump. In addition, such valves can be prone to failure.
  • the invention specified in claim 1 is based on the object of providing a piston pump for liquids which operates reliably and reliably without valves.
  • a piston pump according to the preamble of claim 1 that the piston is perforated parallel to its axis and that on the suction side of the piston a separate, separate piston piston cover of a diameter that corresponds at most to the piston diameter is provided, which is adjustably connected to the piston rod in such a way that it is under pressure -And the suction stroke of the piston lies tightly against the same and seals the holes in the piston and is spaced from the piston during the return stroke, which creates a gap between the piston and the piston cover for the flow of the liquid through the piston.
  • the piston cover is advantageously provided with a neck with an internal thread that runs freely through a bore of the piston and into which a pin with an external thread of the piston rod is screwed.
  • the piston cover is set relative to the piston so that the distance of the piston cover from the piston during the return stroke of the piston is at most 2 mm, the piston stroke varying.
  • the piston pump shown in the figures can be used for various liquids, such as water, milk, cream.
  • the piston pump consists of a cylinder 1 and two end parts 14 and 16 screwed to the cylinder 1 by means of connecting screws 21.
  • One 14 of the end parts is provided with an inlet 15 for the liquid.
  • the piston 2 with the piston rod 11 is arranged to be reciprocable in the cylinder 1.
  • the piston 2 is provided on its peripheral surface with annular seals 4.
  • the piston 2 is further perforated parallel to its axis, as can be seen from FIG. 3.
  • the number of holes 3 can advantageously be three.
  • a circular piston cover 5 separate from the piston 2 is provided on the suction side of the piston 2.
  • the diameter of the piston cover 5 does not exceed the diameter of the piston 2; it is advantageously a few millimeters smaller than that of the piston 2.
  • the piston cover 5 has a neck 6 with an internal thread 7, which passes through a central bore 22 of the piston 2 with play.
  • a pin 12 with an external thread 13 of the piston rod 11 is screwed into the neck 6 of the piston cover 5.
  • the diameter of the piston rod 11 is larger than that of the pin 12 with an external thread 13 and that of the bore 22 in the piston 2.
  • the outside of the neck is coated with Teflon 8 to prevent abrasion.
  • connection of the piston cover 5 with the piston rod 11 can be adjusted as desired. This connection is such that the piston cover 5 during the return stroke of the piston 2 against the first End part 14 with inlet 15 is spaced from the piston 2. As a result, an intermediate space 24 for the flow of the liquid through the piston 2 is formed between the piston 2 and the piston cover 5.
  • the distance between the piston cover 5 and the piston 2 is at most 2 mm and is given by the fact that the piston rod 11 is supported against the pressure side of the piston 2 and presses it during the return stroke.
  • the piston cover 5 lies close to the piston 2, so that the holes 3 in the piston 2 are closed.
  • the piston 2 is pulled through the piston rod 11, a gap being formed between the edge of the piston rod 11 facing the piston 2 and the pressure side of the piston 2.
  • the liquid is pressed out of the working space of the cylinder 1 via the outlet 17.
  • the liquid cannot escape along the inner wall of the cylinder 1 because the piston in the cylinder 1 is sealed by ring-shaped seals 4.
  • the liquid can also not flow through the holes 3 in the piston 2 because they are sealed off by the piston cover 5.
  • the piston 2 is provided with a raised edge 9 on its suction side.
  • the edge of the piston cover is folded inwards on its side facing the piston 2.
  • the folded edge 10 of the piston cover 5 comes to rest on the raised edge 9 of the piston 2, so that the piston 2 forms a tight fit with the piston cover 5.
  • the outside diameter of the piston cover 5 is somewhat smaller than the outside diameter of the piston 2.
  • the second end part 16 has a sealed bore 19 through which the piston rod 11 is passed.
  • the piston rod 11 is then connected to a drive shaft 23 of an electric motor (not shown), advantageously eccentrically. With 18 and 20 seals are designated.
  • Such a piston pump can, for. B. be used in a device for making whipped cream.
  • the cream with air is fed into the pump through the inlet.
  • the piston which is driven by an electric motor at 1,500 rpm, reciprocates, the stroke length varying in the range of approximately 10 mm.
  • the cream with air sucked into the cylinders is forced out of the cylinder into a homogenizer, in which the blow occurs.
  • the pressure in the piston pump is around 6.7 atm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP83810165A 1982-04-21 1983-04-20 Pompe à piston pour liquides Expired EP0093691B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83810165T ATE17158T1 (de) 1982-04-21 1983-04-20 Kolbenpumpe fuer fluessigkeiten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH242082 1982-04-21
CH2420/82 1982-04-21

Publications (2)

Publication Number Publication Date
EP0093691A1 true EP0093691A1 (fr) 1983-11-09
EP0093691B1 EP0093691B1 (fr) 1985-12-27

Family

ID=4233390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810165A Expired EP0093691B1 (fr) 1982-04-21 1983-04-20 Pompe à piston pour liquides

Country Status (3)

Country Link
EP (1) EP0093691B1 (fr)
AT (1) ATE17158T1 (fr)
DE (1) DE3361613D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035440A (en) * 1989-08-09 1991-07-30 Chappell International, Inc. Pump
US5127804A (en) * 1989-08-09 1992-07-07 Innovative Bicycle Products, Inc. Bicycle seat-tube pump with one-way valves
FR2689570A1 (fr) * 1992-04-07 1993-10-08 Serac Group Pompe volumétrique.
EP0715039A1 (fr) 1994-11-30 1996-06-05 Fischer, Willibald Elément de coffrage
FR2817848A1 (fr) * 2000-12-12 2002-06-14 Rexam Sofab Micropompe electronique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR489088A (fr) * 1917-02-16 1918-12-13 Georges Constantinesco Perfectionnements aux pompes
DE462509C (de) * 1926-03-10 1928-07-13 John Coard Franke Verfahren zum Heben von Fluessigkeiten mittels Pumpen mit Schoepfkolben
CH253083A (de) * 1946-05-10 1948-02-15 Maier Emilio Mit Trägheitskraft arbeitende Kolbenpumpe.
US2933050A (en) * 1957-05-23 1960-04-19 Reynolds Oil Well Pumps Inc Oil well pump
FR1323618A (fr) * 1962-02-27 1963-04-12 Perfectionnement aux pompes à piston
FR1592548A (fr) * 1968-06-21 1970-05-19
US3536424A (en) * 1968-11-12 1970-10-27 Hydro Seal Ltd Pump and piston assembly therefor
DE2263363A1 (de) * 1972-12-23 1974-07-11 Canada Tiefbohrgeraete Und Mas Kolbenpumpe, insbesondere tiefpumpe
DE2628985A1 (de) * 1976-06-28 1977-12-29 Speck Kolbenpumpen Fabrik Zylinder-kolbenanordnung fuer eine fluessigkeitspumpe

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR489088A (fr) * 1917-02-16 1918-12-13 Georges Constantinesco Perfectionnements aux pompes
DE462509C (de) * 1926-03-10 1928-07-13 John Coard Franke Verfahren zum Heben von Fluessigkeiten mittels Pumpen mit Schoepfkolben
CH253083A (de) * 1946-05-10 1948-02-15 Maier Emilio Mit Trägheitskraft arbeitende Kolbenpumpe.
US2933050A (en) * 1957-05-23 1960-04-19 Reynolds Oil Well Pumps Inc Oil well pump
FR1323618A (fr) * 1962-02-27 1963-04-12 Perfectionnement aux pompes à piston
FR1592548A (fr) * 1968-06-21 1970-05-19
US3536424A (en) * 1968-11-12 1970-10-27 Hydro Seal Ltd Pump and piston assembly therefor
DE2263363A1 (de) * 1972-12-23 1974-07-11 Canada Tiefbohrgeraete Und Mas Kolbenpumpe, insbesondere tiefpumpe
DE2628985A1 (de) * 1976-06-28 1977-12-29 Speck Kolbenpumpen Fabrik Zylinder-kolbenanordnung fuer eine fluessigkeitspumpe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035440A (en) * 1989-08-09 1991-07-30 Chappell International, Inc. Pump
US5127804A (en) * 1989-08-09 1992-07-07 Innovative Bicycle Products, Inc. Bicycle seat-tube pump with one-way valves
FR2689570A1 (fr) * 1992-04-07 1993-10-08 Serac Group Pompe volumétrique.
EP0569262A1 (fr) * 1992-04-07 1993-11-10 Serac France Pompe volumétrique
US5292236A (en) * 1992-04-07 1994-03-08 Serac France Positive displacement pump with pivot piston valve
EP0715039A1 (fr) 1994-11-30 1996-06-05 Fischer, Willibald Elément de coffrage
FR2817848A1 (fr) * 2000-12-12 2002-06-14 Rexam Sofab Micropompe electronique
WO2002047826A1 (fr) * 2000-12-12 2002-06-20 Rexam Dispensing Systems Micropompe electronique

Also Published As

Publication number Publication date
EP0093691B1 (fr) 1985-12-27
ATE17158T1 (de) 1986-01-15
DE3361613D1 (en) 1986-02-06

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