US3556691A - Pump having a piston with a combined rotary and reciprocating action - Google Patents

Pump having a piston with a combined rotary and reciprocating action Download PDF

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Publication number
US3556691A
US3556691A US847090A US3556691DA US3556691A US 3556691 A US3556691 A US 3556691A US 847090 A US847090 A US 847090A US 3556691D A US3556691D A US 3556691DA US 3556691 A US3556691 A US 3556691A
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United States
Prior art keywords
piston
pump
chamber
inlet
outlet
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Expired - Lifetime
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US847090A
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English (en)
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Albert Friedrich Buri
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Individual
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Individual
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    • 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
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/06—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated

Definitions

  • a pump comprising a housing defining a chamber, an inlet connection to said chamber and an outlet connection therefrom, a piston mounted for reciprocatory movement in said chamber to draw fluid therein through said inlet during an induction stroke of said piston and to expel fluid drawn into said chamber from said outlet during a reciprocal exhaust stroke of said piston, the piston having a duct, one end thereof opening into said chamber and the other end terminating in at least one aperture in the outer surface of said piston, the piston being mounted so that the aperture is aligned with said inlet during said induction stroke and is rotated so that the aperture is aligned with said outlet during the exhaust stroke, said pump further including means for urging the inlet and outlet connections against the outer surface of said piston to provide a fluid tight seal therewith.
  • a pump in accordance with the invention overcomes the disadvantages mentioned above because the inlet and outlet connections are separate and are urged onto the periphery of the piston to provide a fluid tight seal therewith.
  • the inlet and outlet connections are spring-loaded so that the piston no longer has to be a close fit in the pump housing, thus overcoming the problems associated with sealing and the provision of close tolerances. Temperature fluctuations resulting in changes in the dimensions of the housing, piston and inlet and outlet connections are compensated for by the spring loading.
  • the most suitable materials for the pump are glass and the branded product Teflon.
  • FIG. 1 is a cross section of a pump in accordance with the present invention
  • FIGS. 2 to 6 show cross sections of a simplified pump at various stages in the operation thereof
  • FIG. 7 shows a cross section of the simplified pump along the line VII-VII in FIG. 4.
  • the pump shown in FIG. 1 comprises the following main components: a double-walled pump housing 1 having two connections 10 and 11 for circulating heating or cooling media through the housing; a pump cylinder 2; a hollow piston 3 having one end opening into the pump chamber formed by the housing 1 and the other end closed by an insert 12, the piston 3 having a perforated zone 4 including one or more apertures which are accurately defined both with regard to position and dimensions relative to the ends of the piston; a suction input connection 5 and diametrically opposite thereto a pressure output connection 6, the ends of the input and output connections within the chamber are shaped to fit closely to the periphery of the piston 3.
  • the inlet and outlet connections are urged against the piston by compression springs 7 and 8.
  • Other elements such as the sealing and connecting parts are of standard design found in pumps and are therefore not dealt with in detail.
  • the most suitable material for the housing 1, the cylinder 2 and the piston 3 is instrument glass and for the two connections 5 and 6 Teflon (registered trademark).
  • FIGS. 2 to 7 are used to facilitate understanding of the operation of the pump shown in FIG. 1, the legend for these diagrams being as before i.e., the pump housing 1, piston 3 with perforated zone 4, the suction input connection 5 and the pressure output connection 6.
  • the hollow piston 3 is actuated by a drive mechanism (not shown) so that it is given a rotary movement represented by the arrow r and a reciprocating motion represented by the arrow h.
  • the perforated zone 4 is located so that at the beginning of the suction stroke it faces the suction connection 5 while the pressure connection 6 is urged against the solid wall of the piston 3 closing the output connection (FIG. 2). Axial movement of the piston 3 in the direction of the arrow +h in FIG. 2-
  • the drive should provide infinitely variable reciprocating and rotary motions which would enable, for instance, the stroke to be ,speeded up and shortened or slowed down and lengthened according to requirements.
  • the piston is not an exact fit in the pump housing. Instead the seal on the inlet and outlet sides is provided by the input and output connections that are spring-loaded onto the outer surface of the piston. Accordingly the dosing accuracy is not affected by tolerance problems nor by the influence of temperature fluctuations on materials so that virtually all the materials such as metal, glass, plastics or ceramics can be used for the construction of these pumps. This advantage combined with the elimination of valves makes it possible for such pumps to handle most of the liquids or suspensions encountered in practice.
  • a pump comprising a housing defining a chamber, an inlet connection to said chamber and an outlet connection therefrom, a piston mounted for reciprocatory movement in said chamber to draw fluid therein through said inlet during an induction stroke of said piston and to expel fluid drawn into said chamber from said outlet during a reciprocal exhaust stroke of said piston, the piston having a duct, one end thereof opening into said chamher and the other end terminating in at least one aperture in the outer surface of said piston, the piston being mounted so that the aperture is aligned with said inlet during said induction stroke and is rotated so that the aperture is aligned with said outlet during the exhaust stroke, said pump further including means for urging the inlet and outlet connections against the outer surface of said piston to provide a fluid tight seal therewith.
  • a pump according to claim 1 in which said piston is hollow and includes a plurality of apertures in the outer 4 surface thereof which communicate with the hollow interior to form said duct.
  • a pump according to claim 2 including a cylinder within which said piston is mounted for reciprocal and rotary motion, said cylinder being secured to said housing and extending into said chamber.
  • a pump according to claim 3 in which at least a portion of said piston extends from that part of the cylinder within said chamber at both extremities of the exhaust and induction stroke and said inlet and outlet connectionsare mounted so as to bear against the outer surface of said portion of said piston to provide a fluid tight seal therewith.
  • a pump according to claim 1 in which said housing includes a jacket surrounding said chamber and an inlet and outlet to said jacket for the admission and extraction of cooling fluid.
  • a pump comprising a housing defining a chamber therein, a cylinder secured to said housing and extending into said chamber, a hollow piston mounted in said cylinder for reciprocatory and rotary motion, said piston having one end opening into said chamber and a plurality of apertures in the outer surface of the piston communicating with the hollow interior thereof, inlet and outlet connections each mounted to said housing and communicating with said chamber, said inlet and outlet connections each having an insert mounted therein and springloaded to urge said inserts onto the outer surface of said piston to provide a fluid tight seal therewith, said piston being so mounted that during a reciprocal induction stroke the apertures in the piston align with said inlet connection and during an exhaust stroke and rotation of said piston the apertures align with said outlet connection.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US847090A 1968-08-30 1969-08-04 Pump having a piston with a combined rotary and reciprocating action Expired - Lifetime US3556691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1306668A CH495508A (de) 1968-08-30 1968-08-30 Drehschieber - Kolben - Pumpe

Publications (1)

Publication Number Publication Date
US3556691A true US3556691A (en) 1971-01-19

Family

ID=4388983

Family Applications (1)

Application Number Title Priority Date Filing Date
US847090A Expired - Lifetime US3556691A (en) 1968-08-30 1969-08-04 Pump having a piston with a combined rotary and reciprocating action

Country Status (6)

Country Link
US (1) US3556691A (de)
AT (1) AT286111B (de)
CH (1) CH495508A (de)
DE (2) DE1943395A1 (de)
FR (1) FR2016668A1 (de)
GB (1) GB1271969A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043711A (en) * 1975-04-24 1977-08-23 Mikuni Kogyo Kabushiki Kaisha Lubricating oil pump
US20070193609A1 (en) * 2005-12-27 2007-08-23 Bsh Bosch Und Siemens Hausgerate Gmbh Dosing device for the addition of an additive to a treatment chamber and dishwasher machine with a dosing device
WO2009069063A1 (en) * 2007-11-27 2009-06-04 Koninklijke Philips Electronics N.V. Implantable therapeutic substance delivery device
US20110002802A1 (en) * 2007-12-10 2011-01-06 Medrad, Inc. Continuous fluid delivery system
US10507319B2 (en) 2015-01-09 2019-12-17 Bayer Healthcare Llc Multiple fluid delivery system with multi-use disposable set and features thereof
JP2024077006A (ja) * 2022-11-25 2024-06-06 ゼンジーレ・メディカル・アーゲー マイクロポンプ

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH636703A5 (fr) * 1980-10-01 1983-06-15 Sapal Plieuses Automatiques Machine de dosage pour produits de consistance liquide a pateuse.
AT526919B1 (de) * 2023-03-01 2024-09-15 Friedl Rainhard Kolbenmaschine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043711A (en) * 1975-04-24 1977-08-23 Mikuni Kogyo Kabushiki Kaisha Lubricating oil pump
US20070193609A1 (en) * 2005-12-27 2007-08-23 Bsh Bosch Und Siemens Hausgerate Gmbh Dosing device for the addition of an additive to a treatment chamber and dishwasher machine with a dosing device
US8182615B2 (en) * 2005-12-27 2012-05-22 Bsh Bosch Und Siemens Hausgeraete Gmbh Dosing device for the addition of an additive to a treatment chamber and dishwasher machine with a dosing device
WO2009069063A1 (en) * 2007-11-27 2009-06-04 Koninklijke Philips Electronics N.V. Implantable therapeutic substance delivery device
US20110002802A1 (en) * 2007-12-10 2011-01-06 Medrad, Inc. Continuous fluid delivery system
US9057363B2 (en) 2007-12-10 2015-06-16 Bayer Medical Care, Inc. Continuous fluid delivery system
US10507319B2 (en) 2015-01-09 2019-12-17 Bayer Healthcare Llc Multiple fluid delivery system with multi-use disposable set and features thereof
US11491318B2 (en) 2015-01-09 2022-11-08 Bayer Healthcare Llc Multiple fluid delivery system with multi-use disposable set and features thereof
US12201802B2 (en) 2015-01-09 2025-01-21 Bayer Healthcare Llc Multiple fluid delivery system with multi-use disposable set and features thereof
JP2024077006A (ja) * 2022-11-25 2024-06-06 ゼンジーレ・メディカル・アーゲー マイクロポンプ

Also Published As

Publication number Publication date
FR2016668A1 (de) 1970-05-08
DE6933625U (de) 1970-02-12
GB1271969A (en) 1972-04-26
DE1943395A1 (de) 1970-03-05
CH495508A (de) 1970-08-31
AT286111B (de) 1970-11-25

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