EP0980977A2 - Piston for a piston compressor - Google Patents

Piston for a piston compressor Download PDF

Info

Publication number
EP0980977A2
EP0980977A2 EP99116360A EP99116360A EP0980977A2 EP 0980977 A2 EP0980977 A2 EP 0980977A2 EP 99116360 A EP99116360 A EP 99116360A EP 99116360 A EP99116360 A EP 99116360A EP 0980977 A2 EP0980977 A2 EP 0980977A2
Authority
EP
European Patent Office
Prior art keywords
piston
support ring
piston head
ring
head
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.)
Withdrawn
Application number
EP99116360A
Other languages
German (de)
French (fr)
Other versions
EP0980977A3 (en
Inventor
Erfindernennung liegt noch nicht vor Die
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.)
Magna BDW Technologies GmbH
Original Assignee
Magna BDW Technologies GmbH
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 Magna BDW Technologies GmbH filed Critical Magna BDW Technologies GmbH
Publication of EP0980977A2 publication Critical patent/EP0980977A2/en
Publication of EP0980977A3 publication Critical patent/EP0980977A3/en
Withdrawn legal-status Critical Current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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0469—Other heavy metals
    • F05C2201/0475—Copper or alloys thereof

Definitions

  • the present invention relates to a piston for piston compressors for gaseous media with one inside a cylinder reciprocating connecting rods, the connecting rod with the Piston is connected and the piston has a valve disk with at least a passage for the to be sucked in from the bottom of the piston gaseous medium and an annular piston head Has plastic.
  • Such a piston for a piston compressor for gaseous Media is known from WO 96/05430.
  • the well-known piston has a piston head with an annular groove, in a helical spring washer is used. This spans one Sealing lip of the piston head radially outwards, so that a secure Given the piston head against the cylinder inner wall is.
  • a disadvantage of this known piston is that the manufacturing costs are high for such a coil spring washer and Assembly is complex. It has also been found that at the usual heating of the piston head of the coil spring ring is uneven pushes radially outward, causing leaks between the piston head and the inner wall of the cylinder.
  • a piston according to the invention has a piston head which a closed metal support ring on the inside of the ring or a metal alloy, the expansion coefficient of the support ring material and the cylinder material approximately are the same. This ensures that the measure between the cylinder inner wall and the support ring is always constant and the one pressed against the cylinder inner wall by the support ring Piston head seals with this.
  • a support ring is inexpensive to manufacture and light on the inside the piston head.
  • the Brass support ring In an advantageous embodiment of the invention, the Brass support ring.
  • the piston head facing Be outside of the support ring curved outward. This results in an easier attachment of the support ring in the corresponding groove of the piston head.
  • the outside the piston head is also curved. Total results this advantageously results in a uniform power transmission on the outside of the piston head and thus one secure seal between piston and inner cylinder wall.
  • FIG. 1 shows a piston 10 according to the invention for a piston compressor for gaseous media with a cylinder 12.
  • a connecting rod 14 is moved back and forth or moved up and down.
  • the connecting rod 14 is fixed to the piston 10 connected.
  • the piston 10 has a valve disk 16 with an annular shape arranged passages 18 for the piston side gaseous medium to be sucked up.
  • valve plate 16 protrudes through the central ring opening of the piston head 20 or the support ring 22 through, the diameter of the projecting valve plate element 30 is smaller than the diameter of the support ring 22.
  • piston head 20 one on its inner side facing the connecting rod 14 annular support surface 32 for a piston disc 34.
  • the Piston head 20 can be between the valve plate 14 and the Piston disk 34 are moved up and down.
  • a closed Support ring 22 made of metal or a metal alloy, the coefficients of expansion of the support ring material and of the cylinder material are approximately the same.
  • the support ring 22 is made of brass.
  • FIG. 2 shows a schematic, partially sectioned detail drawing of the piston head 20. You can see the annular formation of the piston head 20 and the formation of the bearing surface 32 for the piston disc 34. Furthermore, it can be seen that an annular groove 36 on the inside of the piston head 20 is arranged to receive the support ring 22. The one in FIG. 3 illustrated cross section of the piston head 20 illustrates this.
  • Figure 4 shows a schematic, partially sectioned representation of the support ring 22. It can be seen that the support ring 22 on the the outside 28 facing the piston head 20 is curved outwards is trained. It is also clear that the support ring 22 on the inside of the ring has bevelled edges 24, 26. By this bevel becomes the mobility of the valve plate 16 or the valve plate element 30 in the opening of the support ring 22 improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

There is a reciprocating connecting-rod (14) inside a cylinder (12), with the connecting-rod being connected to a piston (10). The piston has a valve washer (16) with at least one through-let (18) for to-be-sucked gaseous medium, on the piston's underside, and a ring-shaped piston head (20) made from plastics. The piston head may have a sealed support ring (22) on its ring inner side that is made from metal or a metal alloy. The coefficient of friction of both the support ring material and the cylinder material are approximately the same. The support ring may be made from brass and may have a tapered-off bevel (24,26). The valve washer may extend through a central ring opening of the piston head, e.g. the support ring.

Description

Die vorliegende Erfindung betrifft einen Kolben für Kolbenverdichter für gasförmige Medien mit einem innerhalb eines Zylinders hin- und herbewegbaren Pleuel, wobei das Pleuel mit dem Kolben verbunden ist und der Kolben einen Ventilteller mit mindestens einem Durchlaß für das von der Kolbenunterseite anzusaugende gasförmige Medium und einen ringförmigen Kolbenkopf aus Kunststoff aufweist.The present invention relates to a piston for piston compressors for gaseous media with one inside a cylinder reciprocating connecting rods, the connecting rod with the Piston is connected and the piston has a valve disk with at least a passage for the to be sucked in from the bottom of the piston gaseous medium and an annular piston head Has plastic.

Ein derartiger Kolben für einen Kolbenverdichter für gasförmige Medien ist aus der WO 96/05430 bekannt. Der bekannte Kolben weist einen Kolbenkopf mit einer ausgebildeten Ringnut auf, in die ein Wendelfederring eingesetzt wird. Dieser spannt eine Dichtlippe des Kolbenkopfes radial nach außen, so daß ein sicheres Anliegen des Kolbenkopfes an der Zylinderinnenwand gegeben ist.Such a piston for a piston compressor for gaseous Media is known from WO 96/05430. The well-known piston has a piston head with an annular groove, in a helical spring washer is used. This spans one Sealing lip of the piston head radially outwards, so that a secure Given the piston head against the cylinder inner wall is.

Nachteilig an diesem bekannten Kolben ist, daß die Herstellungskosten für einen derartigen Wendelfederring hoch sind und die Montage aufwendig ist. Zudem hat sich herausgestellt, daß bei der üblichen Erwärmung des Kolbenkopfes der Wendelfederring ungleichmäßig radial nach außen drückt, so daß es zu Undichtigkeiten zwischen Kolbenkopf und Zylinderinnenwand kommen kann.A disadvantage of this known piston is that the manufacturing costs are high for such a coil spring washer and Assembly is complex. It has also been found that at the usual heating of the piston head of the coil spring ring is uneven pushes radially outward, causing leaks between the piston head and the inner wall of the cylinder.

Es wurde versucht, die bekannten Wendelfederringe durch gespaltene bzw. offene Stahlringe zu ersetzen. Auch hier kommt es bei Betätigung des Kolbens zu einer unterschiedlichen Ausdehnung des Kolbenkopfes, was wiederum zu Undichtigkeiten zwischen Kolbenkopf und Zylinderinnenwand führt. An attempt was made to split the known spring washers or to replace open steel rings. It also comes here Actuation of the piston to a different extent of the Piston head, which in turn leads to leaks between the piston head and leads cylinder inner wall.

Es ist daher Aufgabe der vorliegenden Erfindung, einen Kolben der eingangs genannten Art bereitzustellen, der kostengünstig herzustellen ist und gleichzeitig eine sichere Dichtung zwischen Kolben und Zylinderinnenwand gewährleistet.It is therefore an object of the present invention, a piston to provide the type mentioned, the inexpensive to manufacture and at the same time a secure seal between Piston and cylinder inner wall guaranteed.

Zur Lösung dieser Aufgabe dienen die Merkmale des Patentanspruches 1.The features of the claim serve to solve this problem 1.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben.Advantageous configurations are described in the subclaims.

Ein erfindungsgemäßer Kolben weist einen Kolbenkopf auf, der an seiner Ringinnenseite einen geschlossenen Stützring aus Metall oder einer Metallegierung aufweist, wobei die Ausdehnungskoeffizienten des Stützringmaterials und des Zylindermaterials ungefähr gleich sind. Dadurch ist gewährleistet, daß das Maß zwischen der Zylinderinnenwand und dem Stützring immer konstant ist und der durch den Stützring an die Zylinderinnenwand angedrückte Kolbenkopf dichtend mit dieser abschließt. Ein derartiger Stützring ist kostengünstig herzustellen und leicht in der Innenseite des Kolbenkopfes zu befestigen.A piston according to the invention has a piston head which a closed metal support ring on the inside of the ring or a metal alloy, the expansion coefficient of the support ring material and the cylinder material approximately are the same. This ensures that the measure between the cylinder inner wall and the support ring is always constant and the one pressed against the cylinder inner wall by the support ring Piston head seals with this. Such a support ring is inexpensive to manufacture and light on the inside the piston head.

In einer vorteilhaften Ausgestaltung der Erfindung besteht der Stützring aus Messing. Zudem kann die dem Kolbenkopf zugewandte Außenseite des Stützringes nach außen gewölbt ausgebildet sein. Daher ergibt sich eine leichtere Befestigung des Stützringes in der entsprechenden Nut des Kolbenkopfes. Zudem ist die Außenseite des Kolbenkopfes ebenfalls gewölbt ausgebildet. Insgesamt ergibt sich dadurch vorteilhafterweise eine gleichmäßige Kraftübertragung auf die Außenseite des Kolbenkopfes und damit eine sichere Dichtung zwischen Kolben und Zylinderinnenwand.In an advantageous embodiment of the invention, the Brass support ring. In addition, the piston head facing Be outside of the support ring curved outward. This results in an easier attachment of the support ring in the corresponding groove of the piston head. In addition, the outside the piston head is also curved. Total results this advantageously results in a uniform power transmission on the outside of the piston head and thus one secure seal between piston and inner cylinder wall.

Weitere Einzelheiten, Ausgestaltungen und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung des zeichnerisch dargestellten Ausführungsbeispieles.Further details, configurations and advantages of the invention result from the following description of the drawing illustrated embodiment.

Es zeigen:

Figur 1
einen schematischen Schnitt durch den erfindungsgemäßen Kolben;
Figur 2
eine schematische Detailzeichnung eines Kolbenkopfes des erfindungsgemäßen Kolbens;
Figur 3
einen schematisch dargestellten Querschnitt durch den Kolbenkopf des erfindungsgemäßen Kolbens; und
Figur 4
eine teilweise geschnittene, schematisch dargestellte Detailzeichnung eines Stützringes des Kolbenkopfes des erfindungsgemäßen Kolbens.
Show it:
Figure 1
a schematic section through the piston according to the invention;
Figure 2
a schematic detailed drawing of a piston head of the piston according to the invention;
Figure 3
a schematically illustrated cross section through the piston head of the piston according to the invention; and
Figure 4
a partially sectioned, schematically illustrated detailed drawing of a support ring of the piston head of the piston according to the invention.

Figur 1 zeigt einen erfindungsgemäßen Kolben 10 für einen Kolbenverdichter für gasförmige Medien mit einem Zylinder 12. Innerhalb des Zylinders 12 wird ein Pleuel 14 hin- und herbewegt bzw. auf- und abbewegt. Das Pleuel 14 ist mit dem Kolben 10 fest verbunden. Der Kolben 10 weist einen Ventilteller 16 mit ringförmig angeordneten Durchlässen 18 für das von der Kolbenseite anzusaugende gasförmige Medium auf. Desweiteren besteht der Kolben 10 aus einem ringförmigen Kolbenkopf 20 aus Kunststoff.FIG. 1 shows a piston 10 according to the invention for a piston compressor for gaseous media with a cylinder 12. Inside of the cylinder 12, a connecting rod 14 is moved back and forth or moved up and down. The connecting rod 14 is fixed to the piston 10 connected. The piston 10 has a valve disk 16 with an annular shape arranged passages 18 for the piston side gaseous medium to be sucked up. There is also the piston 10 from an annular piston head 20 made of plastic.

Der Ventilteller 16 ragt durch die zentrale Ringöffnung des Kolbenkopfes 20 bzw. des Stützringes 22 hindurch, wobei der Durchmesser des hindurchragenden Ventiltellerelementes 30 kleiner ist als der Durchmesser des Stützringes 22. Zudem weist der Kolbenkopf 20 an seiner dem Pleuel 14 zugewandten Ringinnenseite eine ringförmige Auflagefläche 32 für eine Kolbenscheibe 34 auf. Der Kolbenkopf 20 kann dabei zwischen dem Ventilteller 14 und der Kolbenscheibe 34 auf- und abbewegt werden.The valve plate 16 protrudes through the central ring opening of the piston head 20 or the support ring 22 through, the diameter of the projecting valve plate element 30 is smaller than the diameter of the support ring 22. In addition, the piston head 20 one on its inner side facing the connecting rod 14 annular support surface 32 for a piston disc 34. The Piston head 20 can be between the valve plate 14 and the Piston disk 34 are moved up and down.

An der Ringinnenseite des Kolbenkopfes 20 ist ein geschlossener Stützring 22 aus Metall oder einer Metallegierung angeordnet, wobei die Ausdehnungskoeffizienten des Stützringmaterials und des Zylindermaterials ungefähr gleich sind. In dem vorliegenden Ausführungsbeispiel besteht der Stützring 22 aus Messing. On the inside of the piston head 20 is a closed Support ring 22 made of metal or a metal alloy, the coefficients of expansion of the support ring material and of the cylinder material are approximately the same. In the present In the exemplary embodiment, the support ring 22 is made of brass.

Figur 2 zeigt eine schematische, teilweise geschnittene Detailzeichnung des Kolbenkopfes 20. Man erkennt die ringförmige Ausbildung des Kolbenkopfes 20 sowie die Ausbildung der Auflagefläche 32 für die Kolbenscheibe 34. Weiterhin erkennt man, daß an der Ringinnenseite des Kolbenkopfes 20 eine ringförmige Nut 36 zur Aufnahme des Stützrings 22 angeordnet ist. Der in Figur 3 dargestellte Querschnitt des Kolbenkopfes 20 verdeutlicht dies.Figure 2 shows a schematic, partially sectioned detail drawing of the piston head 20. You can see the annular formation of the piston head 20 and the formation of the bearing surface 32 for the piston disc 34. Furthermore, it can be seen that an annular groove 36 on the inside of the piston head 20 is arranged to receive the support ring 22. The one in FIG. 3 illustrated cross section of the piston head 20 illustrates this.

Figur 4 zeigt eine schematische, teilweise geschnittene Darstellung des Stützrings 22. Man erkennt, daß der Stützring 22 an der dem Kolbenkopf 20 zugewandten Außenseite 28 nach außen gewölbt ausgebildet ist. Zudem wird deutlich, daß der Stützring 22 an der Ringinnenseite abgeschrägte Kanten 24, 26 aufweist. Durch diese Abschrägung wird die Beweglichkeit des Ventiltellers 16 bzw. des Ventiltellerelementes 30 in der Öffnung des Stützrings 22 verbessert.Figure 4 shows a schematic, partially sectioned representation of the support ring 22. It can be seen that the support ring 22 on the the outside 28 facing the piston head 20 is curved outwards is trained. It is also clear that the support ring 22 on the inside of the ring has bevelled edges 24, 26. By this bevel becomes the mobility of the valve plate 16 or the valve plate element 30 in the opening of the support ring 22 improved.

Claims (8)

Kolben für einen Kolbenverdichter für gasförmige Medien mit einem innerhalb eines Zylinders (12) hin- und herbewegbaren Pleuel (14), wobei das Pleuel (14) mit dem Kolben (10) verbunden ist und der Kolben (10) einen Ventilteller (16) mit mindestens einem Durchlaß (18) für das von der Kolbenunterseite anzusaugende gasförmige Medium und einen ringförmigen Kolbenkopf (20) aus Kunststoff aufweist,
dadurch gekennzeichnet,
daß der Kolbenkopf (20) an seiner Ringinnenseite einen geschlossenen Stützring (22) aus Metall oder einer Metallegierung aufweist, wobei die Ausdehnungskoeffizienten des Stützringmaterials und des Zylindermaterials ungefähr gleich sind.Piston for a piston compressor for gaseous media with a connecting rod (14) which can be moved back and forth within a cylinder (12), the connecting rod (14) being connected to the piston (10) and the piston (10) having a valve disk (16) has at least one passage (18) for the gaseous medium to be sucked in from the underside of the piston and an annular piston head (20) made of plastic,
characterized,
that the piston head (20) has a closed support ring (22) made of metal or a metal alloy on its ring inside, the coefficients of expansion of the support ring material and the cylinder material being approximately the same. Kolben gemäß Anspruch 1,
dadurch gekennzeichnet,
daß der Stützring (22) aus Messing besteht.Piston according to claim 1,
characterized,
that the support ring (22) consists of brass. Kolben gemäß Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß der Stützring (22) an der dem Kolbenkopf (20) zugewandten Außenseite (28) nach außen gewölbt ausgebildet ist.Piston according to claim 1 or 2,
characterized,
that the support ring (22) on the piston head (20) facing the outside (28) is curved outwards. Kolben gemäß einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Stützring (22) an der Ringinnenseite abgeschrägte Kanten (24, 26) aufweist.Piston according to one of the preceding claims,
characterized,
that the support ring (22) has bevelled edges (24, 26) on the inside of the ring. Kolben gemäß einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Ventilteller (16) durch die zentrale Ringöffnung des Kolbenkopfs (20) bzw. des Stützrings (22) hindurchragt, wobei der Durchmesser des hindurchragenden Ventiltellerelementes (30) kleiner ist als der Durchmesser der Öffnung des Stützrings (22). Piston according to one of the preceding claims,
characterized,
that the valve plate (16) projects through the central ring opening of the piston head (20) or the support ring (22), the diameter of the projecting valve plate element (30) being smaller than the diameter of the opening of the support ring (22). Kolben gemäß einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Kolbenkopf (20) an seiner dem Pleuel (14) zugewandten Ringinnenseite eine ringförmige Auflagefläche (32) für eine Kolbenscheibe (34) aufweist.Piston according to one of the preceding claims,
characterized,
that the piston head (20) has an annular bearing surface (32) for a piston disk (34) on its ring inside facing the connecting rod (14). Kolben gemäß Anspruch 5,
dadurch gekennzeichnet,
daß der Kolbenkopf (20) zwischen dem Ventilteller (14) und der Kolbenscheibe (34) auf- und abbewegt werden kann.Piston according to claim 5,
characterized,
that the piston head (20) can be moved up and down between the valve plate (14) and the piston disc (34). Kolben gemäß einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Stützring (22) in einer ringförmigen Nut (36) an der Ringinnenseite des Kolbenkopfs (20) angeordnet ist.Piston according to one of the preceding claims,
characterized,
that the support ring (22) is arranged in an annular groove (36) on the inside of the piston head (20).
EP99116360A 1998-08-20 1999-08-19 Piston for a piston compressor Withdrawn EP0980977A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29814962U DE29814962U1 (en) 1998-08-20 1998-08-20 Piston for a piston compressor
DE29814962U 1998-08-20

Publications (2)

Publication Number Publication Date
EP0980977A2 true EP0980977A2 (en) 2000-02-23
EP0980977A3 EP0980977A3 (en) 2000-10-11

Family

ID=8061560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99116360A Withdrawn EP0980977A3 (en) 1998-08-20 1999-08-19 Piston for a piston compressor

Country Status (2)

Country Link
EP (1) EP0980977A3 (en)
DE (1) DE29814962U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20106700U1 (en) * 2001-04-18 2002-05-23 Alusuisse Bayrisches Druckgus Piston for a piston compressor
WO2004011804A1 (en) * 2002-07-24 2004-02-05 Ventrex Automotive Gmbh Device for compressing gases
AT414270B (en) * 2002-07-24 2006-10-15 Ventrex Automotive Gmbh DEVICE FOR COMPACING GASES

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2076072A (en) * 1980-03-14 1981-11-25 Maruyama Mfg Co Piston for a piston pump
GB2175653A (en) * 1985-05-23 1986-12-03 Song Wu An air cooling and reciprocating type of air compressor without lubricant
EP0312597A1 (en) * 1987-04-21 1989-04-26 Proizvodstvennoe Obiedinenie 'zavod Imeni M.I.Kalinina' Piston of volume displacement machine
WO1996005430A1 (en) * 1994-08-17 1996-02-22 Bayrisches Druckguss-Werk Thurner Gmbh & Co. Kg Piston for gaseous media piston compressor
DE29717655U1 (en) * 1997-10-02 1998-11-12 Alusuisse Bayrisches Druckgus Piston compressor for gaseous media

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2076072A (en) * 1980-03-14 1981-11-25 Maruyama Mfg Co Piston for a piston pump
GB2175653A (en) * 1985-05-23 1986-12-03 Song Wu An air cooling and reciprocating type of air compressor without lubricant
EP0312597A1 (en) * 1987-04-21 1989-04-26 Proizvodstvennoe Obiedinenie 'zavod Imeni M.I.Kalinina' Piston of volume displacement machine
WO1996005430A1 (en) * 1994-08-17 1996-02-22 Bayrisches Druckguss-Werk Thurner Gmbh & Co. Kg Piston for gaseous media piston compressor
DE29717655U1 (en) * 1997-10-02 1998-11-12 Alusuisse Bayrisches Druckgus Piston compressor for gaseous media

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20106700U1 (en) * 2001-04-18 2002-05-23 Alusuisse Bayrisches Druckgus Piston for a piston compressor
WO2004011804A1 (en) * 2002-07-24 2004-02-05 Ventrex Automotive Gmbh Device for compressing gases
AT414270B (en) * 2002-07-24 2006-10-15 Ventrex Automotive Gmbh DEVICE FOR COMPACING GASES
AT414269B (en) * 2002-07-24 2006-10-15 Ventrex Automotive Gmbh DEVICE FOR COMPACING GASES

Also Published As

Publication number Publication date
EP0980977A3 (en) 2000-10-11
DE29814962U1 (en) 1999-11-04

Similar Documents

Publication Publication Date Title
DE69929713T2 (en) HYDRODYNAMIC SEAL AND METHOD OF MANUFACTURE
DE3205878A1 (en) PISTON FOR A COMBUSTION ENGINE
EP1888918B1 (en) Refrigeration compressor
DE102006004027A1 (en) Oil-free / dry-running air compressor with an improved seal
CH660407A5 (en) SEALING RING FOR PISTON RODS.
DE102013001172A1 (en) poetry
DE2460185C2 (en) Process for the production of sealing elements with a hydrodynamic effect
DE2829352A1 (en) COMPOSITE OR COMPOSITE SEAL, IN PARTICULAR FOR A STIRLING MACHINE
DE2459524A1 (en) POLYTETRAFLUORAETHYLENE LIP SEAL
EP0627582A1 (en) Seal arrangement
DE3213809C2 (en) Cassette seal
DE2756403B2 (en) poetry
DE4314171A1 (en) Insert water seal - is used for radial sealing of shaft, of water pump with endothermic motor, sepg. dry and wet parts of pump
DE3213890A1 (en) THROTTLE VALVE
DE60107549T2 (en) HIGH PRESSURE SEAL
DE3332455A1 (en) VALVE Tappet with ceramic tappet surface
DE3412594A1 (en) MECHANICAL SEAL
EP0980977A2 (en) Piston for a piston compressor
DE3501066C2 (en)
EP0166855A2 (en) Butterfly valve for aggressive fluids
DE60015450T2 (en) Sealing arrangement for a mechanical element that moves back and forth, relative to a guide seat, in particular for shock absorber rod
DE19800827C1 (en) poetry
DE2160645A1 (en) Wiper ring for rotating shafts and the like
DE3114286A1 (en) Spherical piston for compressors or the like
DE823076C (en) Piston ring made of light metal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: THURNER, HELMUT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010411

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20030214

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030625