[go: up one dir, main page]

US20060067842A1 - Simplified piston slidable in a cylinder - Google Patents

Simplified piston slidable in a cylinder Download PDF

Info

Publication number
US20060067842A1
US20060067842A1 US11/271,890 US27189005A US2006067842A1 US 20060067842 A1 US20060067842 A1 US 20060067842A1 US 27189005 A US27189005 A US 27189005A US 2006067842 A1 US2006067842 A1 US 2006067842A1
Authority
US
United States
Prior art keywords
cylinder
piston according
piston
reciprocating
slidable
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.)
Abandoned
Application number
US11/271,890
Inventor
Stefano Meucci
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 US11/271,890 priority Critical patent/US20060067842A1/en
Publication of US20060067842A1 publication Critical patent/US20060067842A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • 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
    • F04B31/00—Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps

Definitions

  • the present invention relates to a simplified piston slidable in a cylinder.
  • pistons for cylinders for example those used in machines of the reciprocating type such as reciprocating compressors.
  • Such a piston which slides in an essentially guided way in a cylinder, typically comprises a piston body fitted on at least one rod which is generally central.
  • the cylinder is generally closed at its two bases, but has an aperture for the shaft which emerges from the cylinder in such a way that motion can be transmitted to the piston body; for example, in the case of a reciprocating compressor, the rod is moved by a reciprocating motor.
  • a mechanical seal must be provided around this aperture to prevent leakage of the fluid contained in the cylinder or, conversely, the entry of dirt into the cylinder from the exterior.
  • the mechanical seal is an element which must be correctly managed and kept in good condition, especially in the case of operations with fluids which are environmentally polluting and harmful to persons.
  • the object of the present invention is therefore to overcome the aforementioned problems and in particular that of providing a simplified piston slidable in a cylinder but which has no operating rod and therefore no corresponding mechanical seals.
  • Another object of the present invention is to provide a simplified piston slidable in a cylinder and which is particularly reliable, functional and relatively inexpensive.
  • FIG. 1 is a lateral and cross-sectional view of a reciprocating compressor which includes a simplified piston slidable in a cylinder according to the present invention.
  • this shows a reciprocating compressor, indicated as a whole by 12 , which includes a simplified piston 14 slidable in a cylinder 16 according to the present invention.
  • the reciprocating compressor 12 is double-acting, and the piston 14 has no central operating rod.
  • the piston 14 is made from metallic material and is slidable in a cylinder 16 which is made from a nonmagnetic material.
  • An external magnetic element 20 such as a ring, slidable externally along the cylinder 16 , is also provided.
  • the magnetic element 20 is moved, for example, by a reciprocating motor of the pneumatic type, which is not shown in the figure.
  • the motion is transmitted to the piston 14 by magnetic coupling from the exterior of the cylinder 16 of nonmagnetic material, by means of the magnetic element 20 .
  • the magnetic element 20 is moved along and outside the cylinder 16 .
  • the magnetic field of the magnetic element 20 moves the piston 14 , which is generally made from metallic material or other material sensitive to the magnetic field.
  • the very high reliability of the piston 14 according to the invention makes it suitable for numerous applications with all types of gas or liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
  • Actuator (AREA)

Abstract

A simplified piston (14), slidable in a cylinder (16), moved by magnetic coupling to an external magnetic element (20) which moves along the cylinder (16).

Description

  • The present invention relates to a simplified piston slidable in a cylinder.
  • In the prior art, there are numerous known types of pistons for cylinders, for example those used in machines of the reciprocating type such as reciprocating compressors.
  • Such a piston, which slides in an essentially guided way in a cylinder, typically comprises a piston body fitted on at least one rod which is generally central.
  • The cylinder is generally closed at its two bases, but has an aperture for the shaft which emerges from the cylinder in such a way that motion can be transmitted to the piston body; for example, in the case of a reciprocating compressor, the rod is moved by a reciprocating motor.
  • A mechanical seal must be provided around this aperture to prevent leakage of the fluid contained in the cylinder or, conversely, the entry of dirt into the cylinder from the exterior.
  • The mechanical seal is an element which must be correctly managed and kept in good condition, especially in the case of operations with fluids which are environmentally polluting and harmful to persons.
  • The object of the present invention is therefore to overcome the aforementioned problems and in particular that of providing a simplified piston slidable in a cylinder but which has no operating rod and therefore no corresponding mechanical seals.
  • Another object of the present invention is to provide a simplified piston slidable in a cylinder and which is particularly reliable, functional and relatively inexpensive.
  • These and other objects of the present invention are achieved with a simplified piston slidable in a cylinder as described in claim 1.
  • Further characteristics of a simplified piston slidable in a cylinder are described in the subsequent claims.
  • The characteristics and advantages of a simplified piston slidable in a cylinder according to the present invention will be made clearer by the following description, provided by way of example and without restrictive intent, with reference to the attached schematic drawing in which:
  • FIG. 1 is a lateral and cross-sectional view of a reciprocating compressor which includes a simplified piston slidable in a cylinder according to the present invention.
  • With reference to FIG. 1, this shows a reciprocating compressor, indicated as a whole by 12, which includes a simplified piston 14 slidable in a cylinder 16 according to the present invention.
  • In the illustrated example, according to the present invention, the reciprocating compressor 12 is double-acting, and the piston 14 has no central operating rod.
  • The piston 14 is made from metallic material and is slidable in a cylinder 16 which is made from a nonmagnetic material.
  • An external magnetic element 20, such as a ring, slidable externally along the cylinder 16, is also provided. The magnetic element 20 is moved, for example, by a reciprocating motor of the pneumatic type, which is not shown in the figure.
  • The operation of the simplified piston 14 slidable in a cylinder 16 according to the invention is clear from what has been described above with reference to the figure, and is briefly as follows.
  • The motion is transmitted to the piston 14 by magnetic coupling from the exterior of the cylinder 16 of nonmagnetic material, by means of the magnetic element 20.
  • The magnetic element 20 is moved along and outside the cylinder 16.
  • The magnetic field of the magnetic element 20 moves the piston 14, which is generally made from metallic material or other material sensitive to the magnetic field.
  • The absence of any seal in contact with the exterior makes the reciprocating compressor constructed with the piston 14 according to the invention, without a rod, particularly suitable for applications where dangerous gases and high pressures are used.
  • The very high reliability of the piston 14 according to the invention makes it suitable for numerous applications with all types of gas or liquid.
  • The characteristics of the simplified piston slidable in a cylinder according to the present invention, and the advantages thereof, will be clearly understood from the above description.
  • The following concluding remarks and observations will be made in order to define the aforesaid advantages more precisely and clearly.
  • In the first place, it should be noted that the simplified piston slidable in a cylinder according to the invention can be conveniently used in applications in which a polluting or harmful process fluid is used.
  • It is also pointed out that the simplified piston slidable in a cylinder according to the invention is simple and reliable in use and is inexpensive by comparison with the prior art.
  • Finally, it is clear that the simplified piston slidable in a cylinder designed in this way can be modified and varied in numerous ways, all within the scope of the invention; furthermore, all the components can be replaced by technically equivalent elements. In practice, the materials used and the forms and dimensions can be chosen at will, subject to technical requirements.

Claims (12)

1. Simplified piston slidable in a cylinder, characterized in that it is moved by magnetic coupling to an external magnetic element which moves along the said cylinder.
2. Piston according to claim 1, characterized in that the said external magnetic element is a ring which is moved outside the said cylinder.
3. Piston according to claim 1, characterized in that the said cylinder is made from a nonmagnetic material.
4. Piston according to claim 1, characterized in that it is made from a material sensitive to a magnetic field.
5. Piston according to claim 4, characterized in that it is made from a metallic material.
6. Piston according to claim 1, characterized in that it is used in a reciprocating machine.
7. Piston according to claim 6, characterized in that the said reciprocating machine is a reciprocating compressor.
8. Piston according to claim 1, characterized in that the said external magnetic element is moved by a reciprocating motor.
9. Piston according to claim 8, characterized in that the said reciprocating motor is of the pneumatic type.
10. Piston according to claim 8, characterized in that it is not provided with a central operating rod.
11. Piston according to claim 1, characterized in that the said cylinder has no seal in contact with the exterior.
12. Piston according to claim 7, characterized in that the said reciprocating compressor is double-acting.
US11/271,890 2002-11-13 2005-11-14 Simplified piston slidable in a cylinder Abandoned US20060067842A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/271,890 US20060067842A1 (en) 2002-11-13 2005-11-14 Simplified piston slidable in a cylinder

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT002400A ITMI20022400A1 (en) 2002-11-13 2002-11-13 SIMPLIFIED PISTON SLIDING WITHIN A CYLINDER
ITMI2002A002400 2002-11-13
US10/704,664 US20040096344A1 (en) 2002-11-13 2003-11-12 Simplified piston slidable in a cylinder
US11/271,890 US20060067842A1 (en) 2002-11-13 2005-11-14 Simplified piston slidable in a cylinder

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/704,664 Continuation US20040096344A1 (en) 2002-11-13 2003-11-12 Simplified piston slidable in a cylinder

Publications (1)

Publication Number Publication Date
US20060067842A1 true US20060067842A1 (en) 2006-03-30

Family

ID=29765346

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/704,664 Abandoned US20040096344A1 (en) 2002-11-13 2003-11-12 Simplified piston slidable in a cylinder
US11/271,890 Abandoned US20060067842A1 (en) 2002-11-13 2005-11-14 Simplified piston slidable in a cylinder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US10/704,664 Abandoned US20040096344A1 (en) 2002-11-13 2003-11-12 Simplified piston slidable in a cylinder

Country Status (6)

Country Link
US (2) US20040096344A1 (en)
EP (1) EP1420164A3 (en)
JP (1) JP2004162713A (en)
AU (1) AU2003261537A1 (en)
IT (1) ITMI20022400A1 (en)
NO (1) NO20035022L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100079013A1 (en) * 2008-10-01 2010-04-01 Wandzilak Brian Machine for generating reciprocal motion and related method
US20110253237A1 (en) * 2010-04-16 2011-10-20 Paul Andrew Sworske Primer bulb

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007136417A (en) * 2005-11-22 2007-06-07 Ulvac Japan Ltd Coating apparatus
EP1972933A1 (en) 2007-03-23 2008-09-24 Coöperatie AVEBE U.A. Chromatographic column system
DE102008015144A1 (en) * 2008-03-20 2009-09-24 GM Global Technology Operations, Inc., Detroit Pump for conveying fluid in motor vehicle, has channel wrapped at outer side with coils, and conveying element made from material exhibiting ferrous magnetic characteristics provided in channel between openings
US9482235B2 (en) 2008-06-20 2016-11-01 Ingersoll-Rand Company Gas compressor magnetic coupler
BRPI0919093A2 (en) * 2008-09-08 2015-12-15 Cameron Int Corp compression system having sealing with magnetic piston coupling.
KR20140034806A (en) * 2011-05-06 2014-03-20 일렉트로룩스 홈 프로덕츠 코오포레이션 엔.브이. Reciprocating pump assembly for liquids
US11592018B2 (en) * 2020-05-22 2023-02-28 Saudi Arabian Oil Company Surface driven downhole pump system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530873A (en) * 1969-03-26 1970-09-29 Leon J Arp Fluid delivery device
US3700360A (en) * 1971-08-23 1972-10-24 Myers Sherman Co Double-acting tandem piston pump
US4231722A (en) * 1977-03-22 1980-11-04 Joachim Teichmann Magnetic reciprocating pump for pumping fluids
US4610658A (en) * 1985-02-21 1986-09-09 Henry Buchwald Automated peritoneovenous shunt
US6851938B2 (en) * 2001-08-28 2005-02-08 Vanderbilt University Magnetic pumping system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127893A1 (en) * 1981-07-15 1983-02-03 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen "WORKING MACHINE FOR CONVEYING LIQUIDS AND GASES
DE3248229C1 (en) * 1982-12-27 1984-06-14 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Working machine for conveying gases and / or liquids
DE3515757A1 (en) * 1985-05-02 1986-11-06 Hans-Michael Dipl.-Chem. 5461 St Katharinen Rannow Seal-less liquid piston pump
JPH03253776A (en) * 1990-03-05 1991-11-12 Nitto Kohki Co Ltd electromagnetic reciprocating pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530873A (en) * 1969-03-26 1970-09-29 Leon J Arp Fluid delivery device
US3700360A (en) * 1971-08-23 1972-10-24 Myers Sherman Co Double-acting tandem piston pump
US4231722A (en) * 1977-03-22 1980-11-04 Joachim Teichmann Magnetic reciprocating pump for pumping fluids
US4610658A (en) * 1985-02-21 1986-09-09 Henry Buchwald Automated peritoneovenous shunt
US6851938B2 (en) * 2001-08-28 2005-02-08 Vanderbilt University Magnetic pumping system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100079013A1 (en) * 2008-10-01 2010-04-01 Wandzilak Brian Machine for generating reciprocal motion and related method
US7855478B2 (en) 2008-10-01 2010-12-21 Wandzilak Brian Machine for generating reciprocal motion and related method
US20110253237A1 (en) * 2010-04-16 2011-10-20 Paul Andrew Sworske Primer bulb
CN102235279A (en) * 2010-04-16 2011-11-09 比米斯制造业公司 Primer bulb
US8834137B2 (en) * 2010-04-16 2014-09-16 Bemis Manufacturing Company Primer bulb

Also Published As

Publication number Publication date
EP1420164A3 (en) 2004-12-08
AU2003261537A1 (en) 2004-06-03
EP1420164A2 (en) 2004-05-19
US20040096344A1 (en) 2004-05-20
NO20035022D0 (en) 2003-11-12
NO20035022L (en) 2004-05-14
ITMI20022400A1 (en) 2004-05-14
JP2004162713A (en) 2004-06-10

Similar Documents

Publication Publication Date Title
KR970009999B1 (en) Power variable cylinder device
US20060067842A1 (en) Simplified piston slidable in a cylinder
GB2153435A (en) Cylinder with leakage prevention mechanism
EP3604869A1 (en) Sealing device
EP3067560A1 (en) Vacuum pump and method for operating a scroll pump or a vacuum pump with at least two pump stages
US2501054A (en) Unloader for pumps
EP3611406B1 (en) Sealing device
SE9604287L (en) Fluid operated actuator
US4413647A (en) Leak detection arrangement for valve having sealing means
CN111902637A (en) Fluid pressure cylinder
DE58906585D1 (en) Mechanical seal.
US6499974B2 (en) Piston pump
US6637314B2 (en) Actuator
US20020084560A1 (en) Shock absorbing device having air envelopes
RU2806862C1 (en) Piston compressor with jacket around piston rod
KR20230040148A (en) Plunger pump having structure of oil leakage prevention
KR200166498Y1 (en) Bestec gas spring
WO2004035228A3 (en) Paste ejection apparatus
AU2021268063B2 (en) Reciprocating compressor with a jacket around the piston rod
KR20000026367A (en) Air cylinder
CN210290335U (en) Explosion-proof hydraulic cylinder
JP4425089B2 (en) Shaft seal
GB1573948A (en) Piston pump packings
CN202628669U (en) Novel hydraulic cylinder
CN117515161A (en) Auxiliary lip type sealing ring of piston rod and cylinder thereof

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION