FR2975148A1 - Device for protecting shaft of car, has sleeve including bore with inlet portion having camelback shaped longitudinal section, where vertices of section are dimensioned to compress seal during removal of shaft from sleeve to lubricate shaft - Google Patents

Device for protecting shaft of car, has sleeve including bore with inlet portion having camelback shaped longitudinal section, where vertices of section are dimensioned to compress seal during removal of shaft from sleeve to lubricate shaft Download PDF

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Publication number
FR2975148A1
FR2975148A1 FR1154197A FR1154197A FR2975148A1 FR 2975148 A1 FR2975148 A1 FR 2975148A1 FR 1154197 A FR1154197 A FR 1154197A FR 1154197 A FR1154197 A FR 1154197A FR 2975148 A1 FR2975148 A1 FR 2975148A1
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FR
France
Prior art keywords
shaft
seal
mechanical member
sleeve
vertices
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.)
Pending
Application number
FR1154197A
Other languages
French (fr)
Inventor
Jean-Francois Muller
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Priority to FR1154197A priority Critical patent/FR2975148A1/en
Publication of FR2975148A1 publication Critical patent/FR2975148A1/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/32Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268Mounting of sealing rings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0028Tools for removing or installing seals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00Shafts; Axles; Cranks; Eccentrics
    • F16C3/02Shafts; Axles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/32Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/324Arrangements for lubrication or cooling of the sealing itself

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

The device has a cylindrical protection sleeve (10) comprising a bore with an inlet portion having a camelback shaped longitudinal section. Two vertices (12) of the section are dimensioned to compress a seal (2) i.e. O-ring, positioned in a cylindrical groove (1A) of a mechanical part (1), during withdrawal of the mechanical part from the sleeve before assembling the mechanical part. The compression of the seal causes rising of oil, which is migrated into the bottom of the groove, for lubricating the mechanical part. The inlet portion of the bore is formed with two grooves (13). An independent claim is also included for a method for protecting a mechanical part such as shaft, before mounting the mechanical part.

Description

DISPOSITIF DE PROTECTION D'UN ORGANE MECANIQUE A JOINT D'ETANCHEITE LUBRIFIE, EN PARTICULIER D'UN ARBRE [0001 La présente invention concerne un dispositif de protection d'un organe mécanique à joint d'étanchéité lubrifié, en particulier mais non exclusivement d'un arbre. [0002] Différents procédés sont connus pour lubrifier des joints d'étanchéité et faciliter, ainsi, l'emmanchement d'une pièce, de type arbre par exemple. On peut, par exemple, déposer un produit qui facilite l'emmanchement avec un système de type « Rotospray® » dans l'alésage ou sur le joint lui-même. De manière alternative, on peut prévoir des joints toriques sur le produit fini, avec un traitement de surface dit « auto-lubrifié ». [0003] Ces procédés connus de l'art antérieur présentent des inconvénients. Ils nécessitent des manipulations supplémentaires, et présentent un temps de mise en oeuvre relativement long, ce qui a pour résultat d'en faire des procédés peu économiques. [0004] Le but de la présente invention est de fournir un dispositif de protection d'un organe mécanique à joint d'étanchéité lubrifié, en particulier mais non exclusivement d'un arbre, qui soit de conception et de réalisation simples, et qui soit efficace, [0005] Un autre but de la présente invention est de fournir un tel dispositif, qui permette de diminuer les risques de blessure du joint d'étanchéité au montage de l'organe mécanique, et de diminuer également les risques de blessure de l'opérateur de montage. [0006] Enfin, c'est aussi un but de la présente invention de fournir un tel dispositif, qui améliore la propreté du poste sur lequel est monté ultérieurement l'organe mécanique. [000n Pour parvenir à ces buts, la présente invention a pour objet un dispositif de protection d'un organe mécanique à joint d'étanchéité lubrifié, le joint The present invention relates to a device for protecting a mechanical member with a lubricated seal, in particular, but not exclusively, of a device for protecting a mechanical member with a lubricated seal. a tree. Various methods are known for lubricating seals and facilitate, thus, the fitting of a part, such as tree. For example, a product that facilitates fitting with a "Rotospray®" type system can be placed in the bore or on the joint itself. Alternatively, one can provide O-rings on the finished product, with a so-called "self-lubricated" surface treatment. These known methods of the prior art have drawbacks. They require additional manipulations, and have a relatively long implementation time, which results in uneconomical processes. The object of the present invention is to provide a device for protecting a mechanical member lubricated seal, particularly but not exclusively a shaft, which is simple in design and construction, and which is Another object of the present invention is to provide such a device, which makes it possible to reduce the risk of injury of the seal when mounting the mechanical member, and also to reduce the risk of injury to the user. mounting operator. Finally, it is also an object of the present invention to provide such a device, which improves the cleanliness of the post on which is mounted later the mechanical member. In order to achieve these objects, the present invention relates to a device for protecting a mechanical member with a lubricated seal, the seal

d'étanchéité étant un joint positionné dans une gorge cylindrique de l'organe mécanique et trempé de fluide de lubrification, et ce dispositif nouveau est constitué par un manchon de protection, cylindrique, dont l'alésage, dans sa partie d'entrée, présente une section longitudinale en forme en « dos de chameau », les sommets de ladite forme en dos de chameau étant dimensionnés de façon à comprimer le joint d'étanchéité lors du retrait de l'organe mécanique du manchon de protection avant le montage de l'organe mécanique, cette compression ayant pour résultat de faire remonter l'huile qui avait migrée en fond de gorge et de lubrifier, ainsi, l'organe mécanique pour en faciliter le montage ultérieur. [0008] Selon le mode préféré de réalisation de l'invention, le diamètre externe du joint d'étanchéité est légèrement supérieur au diamètre des sommets de la forme en dos de chameau, de telle sorte que le joint d'étanchéité est comprimé lors du retrait de l'organe mécanique du manchon de protection. [0009] Selon une application particulière, mais non exclusive, l'organe mécanique est un arbre. [0010] Les sommets de la forme en dos de chameau sont égaux en diamètre de l'alésage destiné à recevoir l'arbre dans son utilisation. [0011] Le joint d'étanchéité est avantageusement un joint torique. [0012] A titre d'exemple, la forme en dos de chameau peut comprendre deux sommets et deux gorges. [0013] La présente invention a également pour objet un procédé de protection d'un organe mécanique à joint d'étanchéité lubrifié, en particulier d'un arbre, avant montage dudit organe mécanique, et ce procédé nouveau comporte les étapes suivantes, prises en combinaison : - on trempe le joint d'étanchéité dans le fluide de lubrification, - on met en place le joint d'étanchéité, ainsi trempé, sur l'organe mécanique, sealant being a seal positioned in a cylindrical groove of the mechanical member and quenched with lubricating fluid, and this new device is constituted by a protective sleeve, cylindrical, whose bore, in its inlet part, presents a camel-back shaped longitudinal section, the tops of said camel-shaped shape being dimensioned so as to compress the seal when the mechanical member is removed from the protective sleeve prior to assembly of the camber; mechanical member, this compression resulting in remount oil that had migrated to the bottom of the groove and lubricate, thus, the mechanical member to facilitate subsequent assembly. According to the preferred embodiment of the invention, the outer diameter of the seal is slightly greater than the diameter of the tops of the camel shape, so that the seal is compressed during the removal of the mechanical member of the protective sleeve. According to a particular application, but not exclusive, the mechanical member is a shaft. The tops of the camel shape are equal in diameter to the bore for receiving the shaft in use. The seal is advantageously an O-ring. For example, the camel back shape may include two vertices and two grooves. The present invention also relates to a method of protecting a mechanical member lubricated seal, particularly a shaft, before mounting said mechanical member, and this new method comprises the following steps, taken in combination: - the seal is quenched in the lubricating fluid, - the seal, thus soaked, is put in place on the mechanical member,

- on conditionne l'organe mécanique dans un dispositif de protection conforme à celui décrit ci-dessus dans ses grandes lignes, le fluide de lubrification migrant alors dans le fond de gorge de l'organe mécanique, - on déconditionne ou retire ledit dispositif de protection en vue du montage de l'organe mécanique, le dispositif de protection comprimant le joint d'étanchéité lors de son retrait et faisant, ainsi, revenir l'huile à la surface du joint d'étanchéité pour faciliter le montage ultérieur de l'organe mécanique. [0014] D'autres buts, avantages et caractéristiques de l'invention apparaîtront dans la description qui suit d'un mode de réalisation préféré, non limitatif de l'objet et de la portée de la présente demande de brevet, accompagnée de dessins dans lesquels : - la figure 1 est une vue en coupe longitudinale, partielle, du dispositif de protection d'un arbre à joint torique auto lubrifié, selon la présente invention, et la figure 2 est une vue en perspective et en coupe partielle du dispositif de la figure 1 intégré dans un conditionnement. [0015] En référence au dessin de la figure 1, on a représenté un arbre, de référence générale 1, d'axe « XX' », portant, dans une gorge 1A, de largeur « A » et située dans le voisinage de son extrémité, un joint torique 2, de section transversale de diamètre « a » et de diamètre externe « D ». [0016] La lubrification du joint torique 2 est assurée avant la mise en place d'un manchon de protection, de référence générale 10. [0017] Le manchon de protection 10 est de forme cylindrique, de longueur "L » et de diamètre « d ». Le manchon 10 est fermé à son extrémité longitudinale 10A tournée vers l'extérieur, et il est ouvert à son extrémité longitudinale d'entrée 10B tournée vers l'arbre. Dans sa partie d'entrée de longueur désignée « I » à partir de la section d'entrée 10B, le manchon 10 présente une section longitudinale en forme en « dos de chameau », par exemple à deux sommets 12 qui alternent the mechanical member is conditioned in a protective device conforming to that described above in its main lines, the lubricating fluid then migrating into the groove bottom of the mechanical member; the said protective device is deconditioned or removed; for the mounting of the mechanical member, the protective device compressing the seal when removed and thus returning the oil to the surface of the seal to facilitate the subsequent assembly of the organ mechanical. Other objects, advantages and features of the invention will appear in the following description of a preferred embodiment, not limiting the object and scope of the present patent application, accompanied by drawings in which: - Figure 1 is a partial longitudinal sectional view of the protection device of a self lubricated O-ring shaft, according to the present invention, and Figure 2 is a perspective view in partial section of the device of Figure 1 integrated in a package. With reference to the drawing of Figure 1, there is shown a shaft, of general reference 1, axis "XX '", carrying, in a groove 1A, width "A" and located in the vicinity of its end, an O-ring 2, of cross-section of diameter "a" and outer diameter "D". The lubrication of the O-ring 2 is provided before the introduction of a protective sleeve, general reference 10. The protective sleeve 10 is cylindrical in shape, length "L" and diameter " The sleeve 10 is closed at its longitudinal end 10A facing outwards, and is open at its longitudinal end of the inlet 10B facing the shaft, in its inlet portion of length designated "I" to from the inlet section 10B, the sleeve 10 has a longitudinal section shaped "camel back", for example two vertices 12 which alternate

avec deux creux ou gorges 13. Les sommets 12 sont dimensionnées de façon à comprimer le joint d'étanchéité 2 lors du retrait de l'arbre 1 du manchon 10 avant le montage de l'arbre 1, cette compression ayant pour résultat de faire remonter l'huile qui avait migrée en fond de gorge 1A et de lubrifier, ainsi, l'arbre 1 pour en faciliter le montage. [0018] La compression du joint d'étanchéité 2 au passage de la forme en dos de chameau peut être relativement importante, de l'ordre de 10 à 30%. [0019] Les sommets 12 de la forme en dos de chameau sont égaux en diamètre de l'alésage destiné à recevoir l'arbre 1 dans son utilisation. [0020] Le fonctionnement du dispositif de protection est décrit ci-après. [0021] Le manchon de protection 10 selon l'invention est monté sur l'arbre 1, après avoir monté le joint 2 sur l'arbre 1 et avoir trempé le joint 2 dans l'huile de lubrification. [0022] Quand l'arbre 1 est conditionné, l'huile migre dans le fond de la gorge 1A durant le temps du stockage. [0023] En retirant le manchon de protection 10 pour effectuer le montage de l'arbre 1 de son alésage, le manchon 10 comprime le joint 2 et fait revenir l'huile qui avait migrée dans la gorge à la surface du joint 2. Ainsi, le joint est à nouveau lubrifié et son montage ultérieur est facilité. De plus, de cette façon, l'intégrité du joint est préservée. [0024] En référence au dessin de la figure 2, on a représenté le dispositif de protection de l'invention décrit ci-dessus intégré dans un conditionnement (représenté partiellement) de référence générale 20. Ce conditionnement 20 peut-être, par exemple, un intercalaire de conditionnement et de stockage, de type classique ou « rotomoulé ». [0025] Le dispositif de protection décrit ci-dessus présente de nombreux avantages, parmi lesquels les avantages suivants : with two recesses or grooves 13. The tops 12 are dimensioned so as to compress the seal 2 during the withdrawal of the shaft 1 of the sleeve 10 before the mounting of the shaft 1, this compression having the result of winding the oil that had migrated at the bottom of the groove 1A and lubricate, thus, the shaft 1 to facilitate assembly. The compression of the seal 2 to the passage of the camel back shape can be relatively large, of the order of 10 to 30%. The vertices 12 of the camel shape are equal in diameter of the bore for receiving the shaft 1 in use. The operation of the protective device is described below. The protective sleeve 10 according to the invention is mounted on the shaft 1, after mounting the seal 2 on the shaft 1 and soaking the seal 2 in the lubricating oil. When the shaft 1 is conditioned, the oil migrates into the bottom of the groove 1A during the storage time. By removing the protective sleeve 10 to mount the shaft 1 of its bore, the sleeve 10 compresses the seal 2 and returns the oil that had migrated into the groove at the surface of the seal 2. Thus , the seal is lubricated again and its subsequent assembly is facilitated. In addition, in this way, the integrity of the joint is preserved. With reference to the drawing of Figure 2, there is shown the protection device of the invention described above integrated in a packaging (shown partially) of general reference 20. This packaging 20 may, for example, a packaging and storage interlayer, of conventional type or "rotomoulded". The protection device described above has many advantages, among which the following advantages:

- il est économique parce qu'il diminue le temps de montage de l'arbre, - il supprime l'investissement d'un système Rotospray®, - il diminue les risques de blessure du joint d'étanchéité, et les risques de blessure de l'opérateur de montage, ^ il améliore la propreté du poste de montage, - il est plus efficace que les moyens connus de l'art antérieur, et son résultat est de meilleure qualité. [0026] Bien entendu, la présente invention n'est pas limitée au mode de réalisation décrit et représenté ci-dessus à titre d'exemple ; d'autres modes de réalisation peuvent être conçus par l'homme de métier sans sortir du cadre et de la portée de la présente invention. - it is economical because it reduces the time of assembly of the shaft, - it removes the investment of a Rotospray® system, - it reduces the risk of injury of the seal, and the risk of injury of the mounting operator, it improves the cleanliness of the mounting station, it is more efficient than the known means of the prior art, and its result is of better quality. Of course, the present invention is not limited to the embodiment described and shown above by way of example; other embodiments may be devised by those skilled in the art without departing from the scope and scope of the present invention.

Claims (7)

REVENDICATIONS1 . Dispositif de protection d'un organe mécanique à joint d'étanchéité lubrifié, le joint d'étanchéité (2) étant un joint positionné dans une gorge cylindrique (1A) de l'organe mécanique (1) et trempé de fluide de lubrification, caractérisé en ce que ledit dispositif est constitué par un manchon de protection (10), cylindrique, dont l'alésage, dans sa partie d'entrée, présente une section longitudinale en forme en « dos de chameau », les sommets (12) de ladite forme en dos de chameau étant dimensionnés de façon à comprimer le joint d'étanchéité (2) lors du retrait de l'organe mécanique (1) du manchon (10) avant le montage dudit organe mécanique (1), cette compression ayant pour résultat de faire remonter l'huile qui avait migrée en fond de gorge (1A) et de lubrifier, ainsi, l'organe mécanique (1) pour en faciliter le montage ultérieur. CLAIMS1. Device for protecting a mechanical member with a lubricated seal, the seal (2) being a seal positioned in a cylindrical groove (1A) of the mechanical member (1) and quenched with lubricating fluid, characterized in that said device is constituted by a cylindrical protective sleeve (10), whose bore, in its inlet part, has a longitudinal section in the form of a "camel's back", the vertices (12) of said camshaft shaped being dimensioned to compress the seal (2) upon removal of the mechanical member (1) from the sleeve (10) prior to mounting of said mechanical member (1), resulting in compression to remount the oil that had migrated to the bottom of the groove (1A) and to lubricate, thus, the mechanical member (1) to facilitate subsequent assembly. 2. Dispositif selon la revendication 1, caractérisé en ce que le diamètre externe (« D ») du joint d'étanchéité (2) est légèrement supérieur au diamètre des sommets (12) de la forme en dos de chameau, de telle sorte que le joint d'étanchéité (2) est comprimé lors du retrait de l'organe mécanique (1) du manchon de protection (10). 2. Device according to claim 1, characterized in that the outer diameter ("D") of the seal (2) is slightly greater than the diameter of the vertices (12) of the camel back shape, so that the seal (2) is compressed upon removal of the mechanical member (1) from the protective sleeve (10). 3. Dispositif selon l'une quelconque des revendications 1 et 2, caractérisé en ce que ledit organe mécanique est un arbre (1). 3. Device according to any one of claims 1 and 2, characterized in that said mechanical member is a shaft (1). 4. Dispositif selon la revendication 3, caractérisé en ce que les sommets (12) de la forme en dos de chameau sont égaux en diamètre de l'alésage destiné à recevoir l'arbre (1) dans son utilisation. 4. Device according to claim 3, characterized in that the vertices (12) of the camel shape are equal in diameter of the bore for receiving the shaft (1) in use. 5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le joint d'étanchéité (2) est un joint torique. 5. Device according to any one of claims 1 to 4, characterized in that the seal (2) is an O-ring. 6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ladite forme en dos de chameau comprend deux sommets (12) et deux gorges (13). 6. Device according to any one of claims 1 to 5, characterized in that said camel back shape comprises two vertices (12) and two grooves (13). 7. Procédé de protection d'un organe mécanique (1) à joint d'étanchéité (2) lubrifié, en particulier d'un arbre, avant montage dudit organe mécanique (1), caractérisé par les étapes suivantes, prises en combinaison : - on trempe le joint d'étanchéité (2) dans le fluide de lubrification, on met en place le joint d'étanchéité (2) ainsi trempé sur l'organe mécanique (1), - on conditionne l'organe mécanique (1) dans un dispositif de protection (10) conforme à l'une quelconque des revendications précédentes, le fluide de lubrification migrant alors dans le fond de gorge de l'organe mécanique (1), on déconditionne ou retire ledit dispositif de protection (10) en vue du montage de l'organe mécanique (1), le dispositif de protection (10) comprimant le joint d'étanchéité (2) lors de son retrait et faisant, ainsi, revenir l'huile à la surface du joint d'étanchéité (2) pour faciliter le montage de l'organe mécanique (1).15 7. A method of protecting a lubricated mechanical seal member (1), in particular a shaft, before mounting said mechanical member (1), characterized by the following steps taken in combination: the sealing gasket (2) is quenched in the lubricating fluid, the sealing gasket (2) thus immersed on the mechanical member (1) is put in place, the mechanical member (1) is conditioned in a protective device (10) according to any one of the preceding claims, the lubricating fluid then migrating into the bottom of the groove of the mechanical member (1), the said protective device (10) being deconditioned or removed in order to the mounting of the mechanical member (1), the protective device (10) compressing the seal (2) during removal and thereby returning the oil to the surface of the seal (2). ) to facilitate the mounting of the mechanical member (1).
FR1154197A 2011-05-13 2011-05-13 Device for protecting shaft of car, has sleeve including bore with inlet portion having camelback shaped longitudinal section, where vertices of section are dimensioned to compress seal during removal of shaft from sleeve to lubricate shaft Pending FR2975148A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1154197A FR2975148A1 (en) 2011-05-13 2011-05-13 Device for protecting shaft of car, has sleeve including bore with inlet portion having camelback shaped longitudinal section, where vertices of section are dimensioned to compress seal during removal of shaft from sleeve to lubricate shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1154197A FR2975148A1 (en) 2011-05-13 2011-05-13 Device for protecting shaft of car, has sleeve including bore with inlet portion having camelback shaped longitudinal section, where vertices of section are dimensioned to compress seal during removal of shaft from sleeve to lubricate shaft

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FR2975148A1 true FR2975148A1 (en) 2012-11-16

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FR1154197A Pending FR2975148A1 (en) 2011-05-13 2011-05-13 Device for protecting shaft of car, has sleeve including bore with inlet portion having camelback shaped longitudinal section, where vertices of section are dimensioned to compress seal during removal of shaft from sleeve to lubricate shaft

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB693074A (en) * 1951-05-22 1953-06-24 Willem Bakker Improvements in or relating to closure means for containers
FR2381949A1 (en) * 1977-02-26 1978-09-22 Taunus Armaturen Gmbh SLIDING SEAL FOR PISTONS AND PISTON RODS
US4603864A (en) * 1985-06-14 1986-08-05 Red Valve Company, Inc. Sealing arrangement for knife gate valves

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB693074A (en) * 1951-05-22 1953-06-24 Willem Bakker Improvements in or relating to closure means for containers
FR2381949A1 (en) * 1977-02-26 1978-09-22 Taunus Armaturen Gmbh SLIDING SEAL FOR PISTONS AND PISTON RODS
US4603864A (en) * 1985-06-14 1986-08-05 Red Valve Company, Inc. Sealing arrangement for knife gate valves

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