EP0527701A1 - Piston compressor for oil-free gas compression - Google Patents

Piston compressor for oil-free gas compression Download PDF

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Publication number
EP0527701A1
EP0527701A1 EP92810552A EP92810552A EP0527701A1 EP 0527701 A1 EP0527701 A1 EP 0527701A1 EP 92810552 A EP92810552 A EP 92810552A EP 92810552 A EP92810552 A EP 92810552A EP 0527701 A1 EP0527701 A1 EP 0527701A1
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EP
European Patent Office
Prior art keywords
piston rod
ring
oil
piston
stuffing box
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
EP92810552A
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German (de)
French (fr)
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EP0527701B1 (en
Inventor
Hans Meier
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.)
Burckhardt Compression AG
Original Assignee
Maschinenfabrik Burckhardt AG
Maschinenfabrik Sulzer Burckhardt AG
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Publication of EP0527701A1 publication Critical patent/EP0527701A1/en
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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
    • 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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/902—Seal for sterling engine

Definitions

  • the invention relates to a piston compressor for oil-free compression of a gas, in particular oxygen, with at least one free-floating piston which is connected via a piston rod to a crosshead, the piston rod sliding on the crosshead side in a guide bearing and on the cylinder side in a stuffing box.
  • the rubber ring stops the oil film from penetrating the piston rod, but it gets wet on the surface itself and can thus become a sling ring for oil drops that form on it. Oil droplets can also be thrown off directly from the windings of the tube spring because the tube spring protrudes from the circumferential surface of the rubber ring. Oil drops thrown off the rubber ring and / or the hose spring can nevertheless reach the area of the stuffing box.
  • the invention has for its object to improve a piston compressor of the type mentioned in such a way that no more oil gets into the area of the gland, be it by advancing as an oil film on the piston rod or by spinning off oil drops.
  • a ring made of porous material is arranged on the piston rod between the guide bearing and the stuffing box and in that the ring has a circumferential groove intended to receive a tube spring, the depth of which - measured from the outside transversely to the longitudinal axis of the piston rod - at least is as large as the outside diameter of one turn of the tube spring.
  • the ring according to the invention consists of porous material, oil penetrating the piston rod is sucked up by the ring and stored in it. Before the ring is saturated with oil, it is removed from the ring by washing and the ring is then reinstalled. Another option is to use oil replace the enriched ring with a dry ring. Since only small amounts of oil are on the way, it takes a long time until the ring volume is saturated. The claimed depth of the circumferential groove ensures that the hose spring no longer protrudes from the outer surface of the ring, so that any oil drops that accumulate on the windings of the hose spring remain within the circumferential groove and cannot be thrown out of the area of the ring.
  • the piston compressor of the vertical type intended for compressing oxygen for example, has a crankcase 1 in which a crankshaft (not shown in detail) is mounted, the crank pin 2 of which is articulated to a push rod 3.
  • the upper end of the push rod 3 is articulated with a pin 4, which is part of a vertically straight up and down movable crosshead 5.
  • the lower end of a piston rod 6 is attached, which carries a piston 7 at its upper end.
  • the piston rod 6 slides in a guide bearing 8 which is fastened to the crankcase 1 at the upper end thereof and which is provided with oil scraper rings 9 at its end protruding from the crankcase.
  • the piston 7 is located in a cylinder housing 10, which is provided at its lower end with a stuffing box 11, which closely surrounds the piston rod 6 - as well as the guide bearing 8 and the oil scraper rings 9. In this way, the piston 7 is freely suspended in the cylinder housing 10.
  • the cylindrical outer surface of the piston 7 is provided with labyrinth grooves 7 ', so that the piston 7 moves up and down during operation of the compressor without touching the adjacent cylinder surface 10'.
  • a spacer 12 is provided between the cylinder housing 10 and the crankcase 1, which connects the two housings 1 and 10.
  • an essentially rectangular cross section is arranged on the piston rod 6, which, as shown in FIG. 2, sits firmly on the piston rod 6 and moves together with it during the operation of the compressor.
  • a constriction 14 is worked into the piston rod 6, into which the ring 15 projects with its correspondingly shaped inner surface.
  • the ring 15 is pressed against the piston rod 6 by a hose spring 13.
  • the ring 15 is made of porous material, which is able to suck up oil droplets penetrating from the piston rod 6 from the bottom upwards and to store them.
  • Possible materials for this purpose are, for example, a plastic made of polyurethane having a porous structure or a body bonded from aluminum grains with a plastic as a binder, or a porous body made of cellulose. It is essential that the ring 15 remains stable in its shape both in the installed oil-free state and in the state soaked with oil.
  • the ring 15 has on its outside a circumferential groove 16, the depth t - measured transversely to the longitudinal axis 6 'of the piston rod - is at least as large as the winding diameter d of the tube spring 13.
  • This dimensioning specification is achieved that the hose spring 13 does not protrude from the outer circumferential surface of the ring 15.
  • the ring is either not cut open across its circumference or cut open once so that it can be elastically expanded during assembly, or it consists of at least two ring segments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

Der Kolbenkompressor weist mindestens einen freifliegend gelagerten Kolben (7) auf, der über eine Kolbenstange (6) mit einem Kreuzkopf (5) verbunden ist. Die Kolbenstange gleitet kreuzkopfseitig in einem Führungslager (8) und zylinderseitig in einer Stopfbüchse (11). Auf der Kolbenstange (6) ist zwischen dem Führungslager (8) und der Stopfbüchse (11) ein Ring (15) aus porösem Werkstoff angeordnet. Der Ring (15) weist eine zum Aufnehmen einer Schlauchfeder bestimmte Umfangsnut auf, deren Tiefe - von aussen quer zur Längsachse (6′) der Kolbenstange gemessen - mindestens so gross ist wie der Aussendurchmesser einer Windung der Schlauchfeder.

Figure imgaf001
The piston compressor has at least one free - floating piston (7), which is connected to a crosshead (5) via a piston rod (6). The piston rod slides on the crosshead side in a guide bearing (8) and on the cylinder side in a stuffing box (11). A ring (15) made of porous material is arranged on the piston rod (6) between the guide bearing (8) and the stuffing box (11). The ring (15) has a circumferential groove for receiving a tube spring, the depth of which - measured from the outside transversely to the longitudinal axis (6 ') of the piston rod - is at least as large as the outside diameter of a turn of the tube spring.
Figure imgaf001

Description

Die Erfindung betrifft einen Kolbenkompressor zum oelfreien Verdichten eines Gases, insbesondere von Sauerstoff, mit mindestens einem freifliegend gelagerten Kolben, der über eine Kolbenstange mit einem Kreuzkopf verbunden ist, wobei die Kolbenstange kreuzkopfseitig in einem Führungslager und zylinderseitig in einer Stopfbüchse gleitet.The invention relates to a piston compressor for oil-free compression of a gas, in particular oxygen, with at least one free-floating piston which is connected via a piston rod to a crosshead, the piston rod sliding on the crosshead side in a guide bearing and on the cylinder side in a stuffing box.

Bei solchen Kompressoren, bei denen das Führungslager meistens noch mit Oelabstreifringen versehen ist, lässt sich nicht vermeiden, dass sich auf der Kolbenstange ein dünner Oelfilm auf dem durch das Führungslager gleitenden Abschnitt der Kolbenstange bildet. Bei mangelhaften Funktionieren der Oelabstreifringe, z.B. infolge langsamer Abnützung, kann dieser Oelfilm auf der Kolbenstange zu wandern beginnen und so in Richtung Stopfbüchse vorstossen, was besonders dann verhindert werden muss, wenn der Kolbenkompressor zum Verdichten von Sauerstoff dient. Um ein Vordringen von Oel in Richtung Stopfbüchse zu behindern, war es bisher üblich, auf der Kolbenstange einen Gummiring anzuordnen, der mittels einer Schlauchfeder an die Kolbenstange gepresst wird, die überdies eine Einschnürung aufweist, in die sich der Gummiring mit seiner Innenfläche einbettet. Der Gummiring hält zwar das Vordringen des Oelfilms auf der Kolbenstange auf, er wird aber oberflächlich selber nass und kann so zum Schleuderring für Oeltropfen werden, die sich auf ihm selbst bilden. Auch von den Windungen der Schlauchfeder können Oeltropfen direkt abgeschleudert werden, weil die Schlauchfeder gegenüber der Umfangsfläche des Gummirings herausragt. Es können also gleichwohl vom Gummiring und/oder von der Schlauchfeder abgeschleuderte Oeltropfen in den Bereich der Stopfbüchse gelangen.In such compressors, in which the guide bearing is usually still provided with oil scraper rings, it cannot be avoided that a thin oil film forms on the piston rod on the section of the piston rod sliding through the guide bearing. If the oil scraper rings are not working properly, e.g. due to slow wear, this oil film can begin to migrate on the piston rod and advance towards the stuffing box, which must be prevented especially if the piston compressor is used to compress oxygen. In order to prevent oil from penetrating in the direction of the stuffing box, it was previously customary to arrange a rubber ring on the piston rod, which was attached by means of a hose spring the piston rod is pressed, which also has a constriction in which the rubber ring is embedded with its inner surface. The rubber ring stops the oil film from penetrating the piston rod, but it gets wet on the surface itself and can thus become a sling ring for oil drops that form on it. Oil droplets can also be thrown off directly from the windings of the tube spring because the tube spring protrudes from the circumferential surface of the rubber ring. Oil drops thrown off the rubber ring and / or the hose spring can nevertheless reach the area of the stuffing box.

Der Erfindung liegt die Aufgabe zugrunde, einen Kolbenkompressor der eingangs genannten Art dahingehend zu verbessern, dass kein Oel mehr in den Bereich der Stopfbüchse gelangt, sei es durch Vordringen als Oelfilm auf der Kolbenstange oder sei es durch Abschleudern von Oeltropfen.The invention has for its object to improve a piston compressor of the type mentioned in such a way that no more oil gets into the area of the gland, be it by advancing as an oil film on the piston rod or by spinning off oil drops.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass auf der Kolbenstange zwischen dem Führungslager und der Stopfbüchse ein Ring aus porösem Werkstoff angeordnet ist und dass der Ring eine zum Aufnehmen einer Schlauchfeder bestimmte Umfangsnut aufweist, deren Tiefe - von aussen quer zur Längsachse der Kolbenstange gemessen - mindestens so gross ist, wie der Aussendurchmesser einer Windung der Schlauchfeder.This object is achieved according to the invention in that a ring made of porous material is arranged on the piston rod between the guide bearing and the stuffing box and in that the ring has a circumferential groove intended to receive a tube spring, the depth of which - measured from the outside transversely to the longitudinal axis of the piston rod - at least is as large as the outside diameter of one turn of the tube spring.

Dadurch das der erfindungsgemässe Ring aus porösem Material besteht, wird auf der Kolbenstange vordringendes Oel von dem Ring aufgesaugt und in ihm gespeichert. Bevor der Ring mit Oel gesättigt ist, wird es aus dem Ring durch Waschen entfernt, und der Ring wird dann wieder eingebaut. Eine andere Möglichkeit besteht darin, den mit Oel angereicherten Ring durch einen trockenen Ring zu ersetzen. Da nur kleine Oelmengen unterwegs sind, dauert es lange bis das Ringvolumen gesättigt ist. Durch die beanspruchte Tiefe der Umfangsnut wird erreicht, dass die Schlauchfeder nicht mehr gegenüber der Aussenfläche des Ringes herausragt, so dass sich allfällig an den Windungen der Schlauchfeder ansammelnde Oeltropfen innerhalb der Umfangsnut bleiben und nicht aus dem Bereich des Ringes weggeschleudert werden können.Because the ring according to the invention consists of porous material, oil penetrating the piston rod is sucked up by the ring and stored in it. Before the ring is saturated with oil, it is removed from the ring by washing and the ring is then reinstalled. Another option is to use oil replace the enriched ring with a dry ring. Since only small amounts of oil are on the way, it takes a long time until the ring volume is saturated. The claimed depth of the circumferential groove ensures that the hose spring no longer protrudes from the outer surface of the ring, so that any oil drops that accumulate on the windings of the hose spring remain within the circumferential groove and cannot be thrown out of the area of the ring.

Ein Ausführungsbeispiel der Erfindung wird in der folgenden Beschreibung anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 einen schematisch vereinfachten Längsschnitt durch einen Kompressor und
  • Fig. 2 das Detail A in Fig. 1 in grösserem Massstab.
An embodiment of the invention is explained in more detail in the following description with reference to the drawing. Show it:
  • Fig. 1 shows a schematically simplified longitudinal section through a compressor and
  • Fig. 2 shows the detail A in Fig. 1 on a larger scale.

Gemäss Fig. 1 weist der z.B. zum Verdichten von Sauerstoff bestimmte Kolbenkompressor der Vertikalbauart ein Kurbelgehäuse 1 auf, in dem eine nicht näher dargestellte Kurbelwelle gelagert ist, deren Kurbelzapfen 2 gelenkig mit einer Schubstange 3 verbunden ist. Das obere Ende der Schubstange 3 ist mit einem Zapfen 4 gelenkig verbunden, der Teil eines vertikal geradlinig auf und ab beweglichen Kreuzkopfes 5 ist. Am Kreuzkopf 5 ist das untere Ende einer Kolbenstange 6 befestigt, die an ihrem oberen Ende einen Kolben 7 trägt. Die Kolbenstange 6 gleitet in einem Führungslager 8, das am oberen Ende des Kurbelgehäuses 1 an diesem befestigt ist und das an seinem aus dem Kurbelgehäuse herausragenden Ende mit Oelabstreifringen 9 versehen ist.1, the piston compressor of the vertical type intended for compressing oxygen, for example, has a crankcase 1 in which a crankshaft (not shown in detail) is mounted, the crank pin 2 of which is articulated to a push rod 3. The upper end of the push rod 3 is articulated with a pin 4, which is part of a vertically straight up and down movable crosshead 5. At the crosshead 5, the lower end of a piston rod 6 is attached, which carries a piston 7 at its upper end. The piston rod 6 slides in a guide bearing 8 which is fastened to the crankcase 1 at the upper end thereof and which is provided with oil scraper rings 9 at its end protruding from the crankcase.

Der Kolben 7 befindet sich in einem Zylindergehäuse 10, das an seinem unteren Ende mit einer Stopfbüchse 11 versehen ist, die die Kolbenstange 6 - ebenso wie das Führungslager 8 und die Oelabstreifringe 9 - eng anliegend umgibt. Auf diese Weise ist der Kolben 7 freifliegend im Zylindergehäuse 10 gelagert. Die zylindrische Aussenfläche des Kolbens 7 ist mit Labyrinthnuten 7′ versehen, so dass sich im Betrieb des Kompressors der Kolben 7 auf und ab bewegt, ohne die benachbarte Zylinderfläche 10′ zu berühren. Zwischen dem Zylindergehäuse 10 und dem Kurbelgehäuse 1 ist ein Distanzstück 12 vorgesehen, das die beiden Gehäuse 1 und 10 verbindet.The piston 7 is located in a cylinder housing 10, which is provided at its lower end with a stuffing box 11, which closely surrounds the piston rod 6 - as well as the guide bearing 8 and the oil scraper rings 9. In this way, the piston 7 is freely suspended in the cylinder housing 10. The cylindrical outer surface of the piston 7 is provided with labyrinth grooves 7 ', so that the piston 7 moves up and down during operation of the compressor without touching the adjacent cylinder surface 10'. A spacer 12 is provided between the cylinder housing 10 and the crankcase 1, which connects the two housings 1 and 10.

Im Bereich des Distanzstückes 12 ist auf der Kolbenstange 6 ein im wesentlichen rechteckigen Querschnitt aufweisender Ring 15 angeordnet, der wie Fig. 2 zeigt, fest auf der Kolbenstange 6 sitzt und sich mit dieser zusammen im Betrieb des Kompressors bewegt. Zu diesem Zweck ist in die Kolbenstange 6 eine Einschnürung 14 eingearbeitet, in die der Ring 15 mit seiner entsprechend geformten Innenfläche ragt. Der Ring 15 wird dabei durch eine Schlauchfeder 13 gegen die Kolbenstange 6 gepresst.In the area of the spacer 12, an essentially rectangular cross section is arranged on the piston rod 6, which, as shown in FIG. 2, sits firmly on the piston rod 6 and moves together with it during the operation of the compressor. For this purpose, a constriction 14 is worked into the piston rod 6, into which the ring 15 projects with its correspondingly shaped inner surface. The ring 15 is pressed against the piston rod 6 by a hose spring 13.

Der Ring 15 besteht aus porösem Werkstoff, der im Stande ist, an der Kolbenstange 6 von unten nach oben vordringende Oeltröpfchen aufzusaugen und in sich zu speichern. Als Werkstoff kommen dafür in Frage z.B. ein eine poröse Struktur aufweisender Kunststoff aus Polyurethan oder ein aus Aluminiumkörnern mit einem Kunststoff als Bindemittel verklebter Körper oder auch ein poröser Körper aus Zellstoff. Wesentlich ist, dass der Ring 15 sowohl im eingebauten oelfreien Zustand wie auch im mit Oel vollgesogenen Zustand in seiner Form stabil bleibt.The ring 15 is made of porous material, which is able to suck up oil droplets penetrating from the piston rod 6 from the bottom upwards and to store them. Possible materials for this purpose are, for example, a plastic made of polyurethane having a porous structure or a body bonded from aluminum grains with a plastic as a binder, or a porous body made of cellulose. It is essential that the ring 15 remains stable in its shape both in the installed oil-free state and in the state soaked with oil.

Zum Aufnehmen der Schlauchfeder 13 weist der Ring 15 auf seiner Aussenseite eine in Umfangsrichtung verlaufende Nut 16 auf, deren Tiefe t - quer zur Längsachse 6′ der Kolbenstange gemessen - mindestens so gross ist wie der Windungsdurchmesser d der Schlauchfeder 13. Durch diese Bemessungsvorschrift wird erreicht, dass die Schlauchfeder 13 nicht gegenüber der äusseren Umfangsfläche des Ringes 15 vorsteht. Je nach Werkstoffwahl ist der Ring entweder quer zu seinem Umfang nicht aufgeschnitten oder einmal aufgeschnitten, so dass er sich beim Montieren elastisch aufweiten lässt, oder er besteht aus mindestens zwei Ringsegmenten.To accommodate the tube spring 13, the ring 15 has on its outside a circumferential groove 16, the depth t - measured transversely to the longitudinal axis 6 'of the piston rod - is at least as large as the winding diameter d of the tube spring 13. This dimensioning specification is achieved that the hose spring 13 does not protrude from the outer circumferential surface of the ring 15. Depending on the choice of material, the ring is either not cut open across its circumference or cut open once so that it can be elastically expanded during assembly, or it consists of at least two ring segments.

Claims (1)

Kolbenkompressor zum oelfreien Verdichten eines Gases, insbesondere von Sauerstoff, mit mindestens einem freifliegend gelagerten Kolben, der über eine Kolbenstange mit einem Kreuzkopf verbunden ist, wobei die Kolbenstange kreuzkopfseitig in einem Führungslager und zylinderseitig in einer Stopfbüchse gleitet, dadurch gekennzeichnet, dass auf der Kolbenstange zwischen dem Führungslager und der Stopfbüchse ein Ring aus porösem Werkstoff angeordnet ist und dass der Ring eine zum Aufnehmen einer Schlauchfeder bestimmte Umfangsnut aufweist, deren Tiefe - von aussen quer zur Längsachse der Kolbenstange gemessen - mindestens so gross ist, wie der Aussendurchmesser einer Windung der Schlauchfeder.Piston compressor for oil-free compression of a gas, in particular oxygen, with at least one free-floating piston which is connected to a crosshead via a piston rod, the piston rod sliding in a guide bearing on the crosshead side and in a stuffing box on the cylinder side, characterized in that on the piston rod between a ring made of porous material is arranged in the guide bearing and the stuffing box and that the ring has a circumferential groove intended to receive a tube spring, the depth of which - measured from the outside transversely to the longitudinal axis of the piston rod - is at least as great as the outside diameter of a turn of the tube spring.
EP92810552A 1991-08-12 1992-07-20 Piston compressor for oil-free gas compression Expired - Lifetime EP0527701B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2381/91 1991-08-12
CH238191 1991-08-12

Publications (2)

Publication Number Publication Date
EP0527701A1 true EP0527701A1 (en) 1993-02-17
EP0527701B1 EP0527701B1 (en) 1995-01-25

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EP92810552A Expired - Lifetime EP0527701B1 (en) 1991-08-12 1992-07-20 Piston compressor for oil-free gas compression

Country Status (7)

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US (1) US5199345A (en)
EP (1) EP0527701B1 (en)
JP (1) JP3241445B2 (en)
AT (1) ATE117770T1 (en)
BR (1) BR9202945A (en)
CA (1) CA2075759C (en)
DE (1) DE59201272D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598553A1 (en) * 1992-11-11 1994-05-25 Ultra Electronics Limited Gas supply apparatus
AT409291B (en) * 1999-06-16 2002-07-25 Hoerbiger Ventilwerke Gmbh wiper

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9501080D0 (en) * 1995-01-19 1995-03-08 Carding Spec Canada Piston rod bearing assembly of reciprocating piston engine
KR101347363B1 (en) 2012-02-23 2014-01-16 삼성중공업 주식회사 Buoy for pipeline laying in subsea and operation method of clamping device
CN104389761A (en) * 2014-11-11 2015-03-04 固耐重工（苏州）有限公司 Labyrinth compressor piston rod guiding device
CN105673447B (en) * 2016-03-24 2018-04-06 沈阳透平机械股份有限公司 A kind of guiding mechanism of labyrinth compressor piston

Citations (4)

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Publication number Priority date Publication date Assignee Title
US2204374A (en) * 1938-06-04 1940-06-11 Ingersoll Rand Co Compressor
DE1083480B (en) * 1953-05-26 1960-06-15 Sulzer Ag Piston compressor
GB905650A (en) * 1958-10-24 1962-09-12 Linde Eismasch Ag Improvements in or relating to shaft seals
EP0424310A1 (en) * 1989-10-18 1991-04-24 Maschinenfabrik Sulzer-Burckhardt AG Piston compressor having pistonrod guide bearings

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Publication number Priority date Publication date Assignee Title
CA513421A (en) * 1955-05-31 Hellingman Evert Oil control means
US1960927A (en) * 1932-02-05 1934-05-29 Mcdonald Mfg Co A Y Stuffing box for reciprocating pumps and the like
US2878990A (en) * 1953-10-30 1959-03-24 Sulzer Ag Upright piston compressor
US4140442A (en) * 1977-03-14 1979-02-20 Perfect Pump Co., Inc. High pressure pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204374A (en) * 1938-06-04 1940-06-11 Ingersoll Rand Co Compressor
DE1083480B (en) * 1953-05-26 1960-06-15 Sulzer Ag Piston compressor
GB905650A (en) * 1958-10-24 1962-09-12 Linde Eismasch Ag Improvements in or relating to shaft seals
EP0424310A1 (en) * 1989-10-18 1991-04-24 Maschinenfabrik Sulzer-Burckhardt AG Piston compressor having pistonrod guide bearings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598553A1 (en) * 1992-11-11 1994-05-25 Ultra Electronics Limited Gas supply apparatus
AT409291B (en) * 1999-06-16 2002-07-25 Hoerbiger Ventilwerke Gmbh wiper

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JP3241445B2 (en) 2001-12-25
CA2075759C (en) 1995-10-17
JPH05195956A (en) 1993-08-06
US5199345A (en) 1993-04-06
EP0527701B1 (en) 1995-01-25
CA2075759A1 (en) 1993-02-13
DE59201272D1 (en) 1995-03-09
ATE117770T1 (en) 1995-02-15
BR9202945A (en) 1993-03-30

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