US3116933A - Rear oil seal for journal boxes - Google Patents

Rear oil seal for journal boxes Download PDF

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US3116933A
US3116933A US831653A US83165359A US3116933A US 3116933 A US3116933 A US 3116933A US 831653 A US831653 A US 831653A US 83165359 A US83165359 A US 83165359A US 3116933 A US3116933 A US 3116933A
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well
dust guard
ridges
seal
outer portion
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US831653A
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Charles S Bohmer
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RAILWAY CAR EQUIPMENT CO
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RAILWAY CAR EQUIPMENT CO
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/74—Sealings of sliding-contact bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/20—Details
    • B61F15/22—Sealing means preventing entrance of dust or leakage of oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

Definitions

  • Journal boxes of the type commonly used for supporting a railroad cai on its axles are conventionally provided with a sealing device adapted to snugly surround the axle dry seat, or fillet portion, at the point where the axle enters the journal box.
  • VThe sealing device thus seals oli the opening ythrough which the axle enters the journal box, preventing dust and other foreign material from entering the box while retaining lubricant therein for lubricating the supporting Deming or brass.
  • Conventional journal boxes have a vertical slot or groove at the point where the axle enters the box, called the dust guard well, which is adapted to receive and retain a rear oil seal in proper position.
  • Seals of this type are subject to very hard usage during normal operation since the axle journal of a railroad car does not remain exactly centered with respect to the journal box when the car is running. Indeed, an axle journal and journal box may shift relative to one another a distance oi over ll/z inches when the cars brakes are applied or the car is otherwise jolted, and it has been observed that the journal brass will jump up to 3A of an inch above the axle journal when track imperfections are encountered at high speeds. Thus,y not only is the axle rotating quite rapidly within the rear oil seal, but the axle will also be frequently jarred laterally and down into the body of the seal. Y
  • Another object of the invention is to provide a rear oil seal of the above type which fits easily and snugly into tight sealing engagement withjournal box dust guard wells of varying width.
  • a further object of the invention is to provide a rear oil seal having the above advantages which is quite economical to manufacture in that it requires a minimum amount of material and can be quitersimply formed.
  • FIGURE l is a longitudinal section of a conventional railroad journal box assembly in which a rear oil seal constructed according to the present invention has been installed;
  • FIG. 2 is a transverse section taken along the line 2 2 in FIG. l;
  • FIG. 3 is a section taken along the line 3 3 in FIG. 2.
  • FIG. l there is shown a railroad journal box 1li including a hinged front cover 12 and a circular aperture 13 formed iu a double rear wall 14. Extending through the aperture 13 is an axle 15 which includes a journal portion 16 and a iillet portion or dry seat 17.
  • journal 16 Resting on top of the journal 16 is the conventional supporting bearing structure or brass Ztl. It will be understood that the axle journal 16 is free to revolve beneath the bearing 2@ and that the bearing, through the journal box 1li, transfers the weight of the railroad car to the axle l5.
  • journal box rear wall llt is provided with a dust guard well 22 generally of U-shaped outer configuration as can be seen in FIG. 2.
  • the parts are so proportioned that the dry seat 1'7 of the axle 15 is disposed in the plane of the dust guard well 22 when the axle and the journal box 10 are in their normal relative positions.
  • the seal 3@ is a unitary body formed lof resilient material having a continuous outer thickened portion or rim 31 shaped to t snugly within the well 22, an inner thickened portion or Vring 32 slightly distended about the axle dry seat 17 so as to maintain a lirm sealing contact therewith, and a relatively thin web portion 33 joining the rim 31 and the ring 32 and forming a barrier closing and sealing the opening 13.
  • the seal 363 is not symmetrical when viewed in longitudinalsection, and therefore the seal has a ⁇ wheel side 33a and a box side 33o facing, respectively, the wheel (not shown) on the axle 15 and the journal box 1o@
  • the web portion 33 joins the rim. 31 closelyadjacent the wheel ⁇ side 33a of the seal30 and the web is folded once at 3ft completely about its periphery toward the box side 33]) of the seal.
  • the web 33 joins the ring 32. at the box side of the latter.
  • the effect of this arrangement is to dispose the ring 32 toward the wheel side 33a of the seal 33.
  • the fold 34 provides llexibility between the rim 31 and the ring 32 and allows free relative movement between these parts in all directions but that direction in which the ring tends to move toward the box side 33h of the seal.
  • Vthe ring 32 can be easily moved up, down and tothe right in FIG. l, and from side to side in FIG. 2, ⁇ through the flexibility inthe fold 3ft.
  • movement of the ring 32 to the left in FIG. l can only be accomplished by stretching thematerialformingthe Web 33.
  • movement of the ring 32 toward the box side 33h ,of the seal is resisted by'thevseal construction.
  • the dry seat i7 must be forced within the ring 32, or more accurately, the ring 32 must be forced over onto the dry seat i7. Since the seal 3?' is constructed so that movement of the ring 32 toward the box side of the seal is strongly resisted by the seal itself, it can be seen that the ring 32 can be drawn over the edge i715: and onto the dry seat 17 without jamming the web 33 against the rough cast walis of the journal box. Stated another way, the seal 39 itself provides the required stiffness to permit the ring 32 to move up onto the ry seat i7. Therefore, the web 33 is not jammed against the rough cast walls ot the journai box when the ring 32 is forced onto the axle dry seat 17.
  • the rim 3?. is formed with oppositely projecting ridges Il and 42 which are arranged about the lower portion of the rim to achieve snug sealing engagement with the walls of the well 22, even though the Iwidth of the well 22. may vary through a very wide range.
  • conventional railroad journal boxes such as the box l@ are formed by casting and it is common experience to set permissible tolerances for the width of the well 22 at as much as plus or minus /G of an inch.
  • the rim 3d must thus be able to snugly' and easily tit within dust guard wells whose width might vary at least as much as 1/8 of an inch.
  • the rim 3l is formed with a thickness that is less than the smallest well width likely to be encountered, the ridges il and 42 are extracted suiciently tar so that the combined thickness of the rim 31 and the ridges 4i and 42 is greater than the widest guard well likely to be encountered, and the ridges dll and 42 are laterally oifset with respect to one another.
  • the effect of this construction is best shown in FXG. 3.
  • the offset ridges are squeezed between the opposed walls of the well and act to twist the rim 31 by slightry distorting the w resilient material forming the rim.
  • the rim 311 is iiexibly distorted as it is inserted into the well 22 permits the seal 3l? to be moved into place without jamming.
  • a steel reinforcement 45 is embedded within the rim 31.
  • a second steel reinforcement 46 is ernbedded within the material forming the ring 32.
  • the seal 3d be molded as a single unt from a suitable oil resistant, resilient material, such as Buna-N, a synthetic rubber s-old under the trade name Hycaiz
  • a suitable oil resistant, resilient material such as Buna-N, a synthetic rubber s-old under the trade name Hycaiz
  • the molding operation required to form the seal Sti is relatively simple because of the uncomplicated conliguration 4of the seal 30.
  • the seal may be very inexpensively manufactured.
  • an oil seal comprising an integrally molded unit of tlexible material including an outer thickened portion shaped to -iit within a journal box dust guard well, said outer' portion being thinner than the smallest allowable Width of a standard railroad journal box dust guard well, an inner thickened portion circular in outline for surrounding an axle dry seat in sealing engagement, a relatively' thin portion connecting said inner and outer portions, and integral projecting sealing ridges extending one from each side of said outer portion so that the overall thickness of the outer portion and its ridges is greater than the largest alowable width of a standard dust guard well, said ridges being laterally offset one from the other on said outer portion so that insertion of the unit into a dust guard well causes the outer portion to twist slightly to accommodate the width of thef well with the sealing ridges snugly engaging the opposite well walls without jamming.
  • an oil seal comprising an integrally molded unit of resilient material including an outer thickened portion shaped to tit within a journal box dust guard well, an inner thickened portion circular in outline for surrounding an axle dry seat in sealing engagement, a relatively thin portion connecting said inner and outer portions, said un-it having a wheel side and a box side to be disposed, when installed, facing the wheel and journal box respectively, said thin portion joining said outer portion closely adjacent the wheel side of the unit and being folded only once toward said box side completely about its periphery so as to dispose said inner portion at the wheel side of said unit, said single fold allowing free relative movement between said inner and outer portions in all directions but that in which the inner portion tends to move toward the box side of the unit, and integral projecting sealing ridges extending one from each side of said outer portion so that the overall thickness of the outer portion and its ridges is greater than the largest allowable width of a standard dust guard well,l
  • said ridges being laterally oifset one from the ⁇ other on said outer portion so that insertion of the unit into a dust guard well causes the outer portion to twist slightly to accommodate the width of the well with the sealing ridges snugly engaging the opposite well walls without jamming.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Description

Jan. 7, 1964 C, s, B01-MER 3,116,933
REAR OIL SEAL FOR JOURNAL BOXES Filed Aug. 4, 1959 IN V EN TOR.
United States Patent() 3,116,933 REAR @EL FR JOURNAL BXES Chai-ies S. Ballmer, Hillsboro, Ill., assignor to` Railway Car Equipmentv Co., Hillsboro, Ill., a corporation of Illinois Filed Aug. 4, 1959,53. No. 831,653 2 Claims. (Cl. 277-174) This invention relates generally to railroad car journal boxes and concerns more particularly a rear oil seal for use in such boxes.
Journal boxes of the type commonly used for supporting a railroad cai on its axles are conventionally provided with a sealing device adapted to snugly surround the axle dry seat, or fillet portion, at the point where the axle enters the journal box. VThe sealing device thus seals oli the opening ythrough which the axle enters the journal box, preventing dust and other foreign material from entering the box while retaining lubricant therein for lubricating the supporting Deming or brass. Conventional journal boxes have a vertical slot or groove at the point where the axle enters the box, called the dust guard well, which is adapted to receive and retain a rear oil seal in proper position.
Seals of this type are subject to very hard usage during normal operation since the axle journal of a railroad car does not remain exactly centered with respect to the journal box when the car is running. Indeed, an axle journal and journal box may shift relative to one another a distance oi over ll/z inches when the cars brakes are applied or the car is otherwise jolted, and it has been observed that the journal brass will jump up to 3A of an inch above the axle journal when track imperfections are encountered at high speeds. Thus,y not only is the axle rotating quite rapidly within the rear oil seal, but the axle will also be frequently jarred laterally and down into the body of the seal. Y
It is therefore an object of the invention to providea rear oil seal for standard journal box assemblies which readily accommodates relative axle-journal boximovernent while minimizing the likelihood of the seal being unseated from the dry seat or fillet portion of the axle journal.
It is an equally important and related object to provide a seal as characterized above that, inthe event the seal is separated from the axle dry seat, permits the parts to regain their normal sealing relationship without crushing or jamming the seal against the rough cast wall surface of the journal box.
Another object of the invention is to provide a rear oil seal of the above type which fits easily and snugly into tight sealing engagement withjournal box dust guard wells of varying width.
A further object of the invention is to provide a rear oil seal having the above advantages which is quite economical to manufacture in that it requires a minimum amount of material and can be quitersimply formed.
Other objects and advantages of the invention will become apparent upon reading the following detailed description and upon reference to the drawings in which:
FIGURE l is a longitudinal section of a conventional railroad journal box assembly in which a rear oil seal constructed according to the present invention has been installed;
FIG. 2 is a transverse section taken along the line 2 2 in FIG. l; and
FIG. 3 is a section taken along the line 3 3 in FIG. 2.
While the invention will be described in connection with a preferred embodiment, it will be understood that I do not intend to limit the invention to that embodiment. On the contrary, l intend to cover all alternatives, modilications and equivalents as may be included within the Mice spirit and scope of the invention as deiined by the appended claims.
Turning lirst to FIG. l, there is shown a railroad journal box 1li including a hinged front cover 12 and a circular aperture 13 formed iu a double rear wall 14. Extending through the aperture 13 is an axle 15 which includes a journal portion 16 and a iillet portion or dry seat 17.
y Resting on top of the journal 16 is the conventional supporting bearing structure or brass Ztl. It will be understood that the axle journal 16 is free to revolve beneath the bearing 2@ and that the bearing, through the journal box 1li, transfers the weight of the railroad car to the axle l5.
For the purpose of conveniently mounting a rear oil seal in the rear of the journal box lil, the journal box rear wall llt is provided with a dust guard well 22 generally of U-shaped outer configuration as can be seen in FIG. 2. The parts are so proportioned that the dry seat 1'7 of the axle 15 is disposed in the plane of the dust guard well 22 when the axle and the journal box 10 are in their normal relative positions.
Providing a rotary seal enclosing the rear of the journal box 1t? is a rear oil seal 3%embodying the present in vention, Vwhich is fully bottomed within the dustjguard well 22 and whichhas an annular sealing edge 3tlg snugly engaging the periphery of theaxle dry seat 17. The seal 3@ is a unitary body formed lof resilient material having a continuous outer thickened portion or rim 31 shaped to t snugly within the well 22, an inner thickened portion or Vring 32 slightly distended about the axle dry seat 17 so as to maintain a lirm sealing contact therewith, and a relatively thin web portion 33 joining the rim 31 and the ring 32 and forming a barrier closing and sealing the opening 13.
The seal 363 is not symmetrical when viewed in longitudinalsection, and therefore the seal has a `wheel side 33a and a box side 33o facing, respectively, the wheel (not shown) on the axle 15 and the journal box 1o@ Pursuant to the invention, the web portion 33 joins the rim. 31 closelyadjacent the wheel` side 33a of the seal30 and the web is folded once at 3ft completely about its periphery toward the box side 33]) of the seal. The web 33 joins the ring 32. at the box side of the latter.
The effect of this arrangement is to dispose the ring 32 toward the wheel side 33a of the seal 33. The fold 34 provides llexibility between the rim 31 and the ring 32 and allows free relative movement between these parts in all directions but that direction in which the ring tends to move toward the box side 33h of the seal. In other words, considering the rim 31 to be held steady, Vthe ring 32 can be easily moved up, down and tothe right in FIG. l, and from side to side in FIG. 2,` through the flexibility inthe fold 3ft. But movement of the ring 32 to the left in FIG. l can only be accomplished by stretching thematerialformingthe Web 33. Thus, movement of the ring 32 toward the box side 33h ,of the seal is resisted by'thevseal construction.
The importance of providing flexibility between the ring 32 and the rim 31 will be obvious to those skilled in the art. This liexibility allows relative movement between the axle and the journal box without damage to the seal 3@ and without affecting its sealing effectiveness.
The importance of disposing the ring 32. toward the wheel side 33a of the seal 3% is that this minimizes the tendency of the ring to drop from the dry seat 17 since the edge 17a of the dry seat is as far away as possible from the normal position of the ring 32. Thus, a maximum amount of axial relative movement between the journal box and the axle is permitted before the ring 32 becomes unseated from the dry seat 17.
Although the ring 32 is kept ras far as possible from the edge 17a of the dry seat 17, experience has shown that relative movement between the axle and the journal box is often suflicient to unseat the ring 32 from the dry seat. Such relative movement between the axle and the journal box could occur, for example, when the railroad ear swings around a relatively sharp curve in the track so that the car, and hence the journal box 1t?, slides to the left in 1li-G. l relative to the axle i5. lf this movement is sufricient, the ring 32 will -be carried over the edge 57a of the axle dry seat. Such extreme movement is always a temporary condition and the journal box llt?, after shifting to the left, is usually slammed back to the right.
When the above described action occurs, it can be seen that to re-establish the normal position of the parts, the dry seat i7 must be forced within the ring 32, or more accurately, the ring 32 must be forced over onto the dry seat i7. Since the seal 3?' is constructed so that movement of the ring 32 toward the box side of the seal is strongly resisted by the seal itself, it can be seen that the ring 32 can be drawn over the edge i715: and onto the dry seat 17 without jamming the web 33 against the rough cast walis of the journal box. Stated another way, the seal 39 itself provides the required stiffness to permit the ring 32 to move up onto the ry seat i7. Therefore, the web 33 is not jammed against the rough cast walls ot the journai box when the ring 32 is forced onto the axle dry seat 17.
In accordance with a further aspect of the invention, the rim 3?. is formed with oppositely projecting ridges Il and 42 which are arranged about the lower portion of the rim to achieve snug sealing engagement with the walls of the well 22, even though the Iwidth of the well 22. may vary through a very wide range. -It should be understood that conventional railroad journal boxes such as the box l@ are formed by casting and it is common experience to set permissible tolerances for the width of the well 22 at as much as plus or minus /G of an inch. The rim 3d must thus be able to snugly' and easily tit within dust guard wells whose width might vary at least as much as 1/8 of an inch.
To achieve this result, the rim 3l is formed with a thickness that is less than the smallest well width likely to be encountered, the ridges il and 42 are extracted suiciently tar so that the combined thickness of the rim 31 and the ridges 4i and 42 is greater than the widest guard well likely to be encountered, and the ridges dll and 42 are laterally oifset with respect to one another. The effect of this construction is best shown in FXG. 3. When the rim 31 is pushed downwardlv into a dust guard well, the offset ridges are squeezed between the opposed walls of the well and act to twist the rim 31 by slightry distorting the w resilient material forming the rim. The fact that the rim 311 is iiexibly distorted as it is inserted into the well 22 permits the seal 3l? to be moved into place without jamming. The slight twist of the rim 31, dependent upon the thickness of the well 22, assures that the offset ridges 42 are urged into snug engagement with the opposite side walls of the well 22, even though the spacing of these walls may vary.
In order to stiften the outer shape of the seal 3o' and rig-idify the rim 31, a steel reinforcement 45 is embedded within the rim 31. To siffen and rigidity the circular shape of the ring 32, a second steel reinforcement 46 is ernbedded within the material forming the ring 32.
It is contemplated that the seal 3d be molded as a single unt from a suitable oil resistant, resilient material, such as Buna-N, a synthetic rubber s-old under the trade name Hycaiz The molding operation required to form the seal Sti is relatively simple because of the uncomplicated conliguration 4of the seal 30. Those skilled in the art will also appreciate that very little material is required to form the seal 3d and hence, for this further reason, the seal may be very inexpensively manufactured.
l claim as my invention:
l. As an article of manufacture, an oil seal comprising an integrally molded unit of tlexible material including an outer thickened portion shaped to -iit within a journal box dust guard well, said outer' portion being thinner than the smallest allowable Width of a standard railroad journal box dust guard well, an inner thickened portion circular in outline for surrounding an axle dry seat in sealing engagement, a relatively' thin portion connecting said inner and outer portions, and integral projecting sealing ridges extending one from each side of said outer portion so that the overall thickness of the outer portion and its ridges is greater than the largest alowable width of a standard dust guard well, said ridges being laterally offset one from the other on said outer portion so that insertion of the unit into a dust guard well causes the outer portion to twist slightly to accommodate the width of thef well with the sealing ridges snugly engaging the opposite well walls without jamming.
2. As an article of manufacture, an oil seal comprising an integrally molded unit of resilient material including an outer thickened portion shaped to tit within a journal box dust guard well, an inner thickened portion circular in outline for surrounding an axle dry seat in sealing engagement, a relatively thin portion connecting said inner and outer portions, said un-it having a wheel side and a box side to be disposed, when installed, facing the wheel and journal box respectively, said thin portion joining said outer portion closely adjacent the wheel side of the unit and being folded only once toward said box side completely about its periphery so as to dispose said inner portion at the wheel side of said unit, said single fold allowing free relative movement between said inner and outer portions in all directions but that in which the inner portion tends to move toward the box side of the unit, and integral projecting sealing ridges extending one from each side of said outer portion so that the overall thickness of the outer portion and its ridges is greater than the largest allowable width of a standard dust guard well,l
said ridges being laterally oifset one from the `other on said outer portion so that insertion of the unit into a dust guard well causes the outer portion to twist slightly to accommodate the width of the well with the sealing ridges snugly engaging the opposite well walls without jamming.
References Cited in the file of this patent UNITED STATES PATENTS 2,668,067 Fitzsimmons Feb. 2, 1954 2,692,783 Foss Oct. 26, 1954 2,758,853 Beck Aug. 14, 1956 2,872,219 Cobb Feb. 3, 1959

Claims (1)

1. AS AN ARTICLE OF MANUFACTURE, AN OIL SEAL COMPRISING AN INTEGRALLY MOLDED UNIT OF FLEXIBLE MATERIAL INCLUDING AN OUTER THICKENED PORTION SHAPED TO FIT WITHIN A JOURNAL BOX DUST GUARD WELL, SAID OUTER PORTION BEING THINNER THAN THE SMALLEST ALLOWABLE WIDTH OF A STANDARD RAILROAD JOURNAL BOX DUST GUARD WELL, AN INNER THICKENED PORTION CIRCULAR IN OUTLINE FOR SURROUNDING AN AXLE DRY SEAT IN SEALING ENGAGEMENT, A RELATIVELY THIN PORTION CONNECTING SAID INNER AND OUTER PORTIONS, AND INTEGRAL PROJECTING SEALING RIDGES EXTENDING ONE FROM EACH SIDE OF SAID OUTER PORTION SO THAT THE OVERALL THICKNESS OF THE OUTER PORTION AND ITS RIDGES IS GREATER THAN THE LARGEST ALLOWABLE WIDTH OF A STANDARD DUST GUARD WELL, SAID RIDGES BEING LATERALLY OFFSET ONE FROM THE OTHER ON SAID OUTER PORTION SO THAT INSERTION OF THE UNIT INTO A DUST GUARD WELL CAUSES THE OUTER PORTION TO TWIST SLIGHTLY TO ACCOMMODATE THE WIDTH OF THE WELL WITH THE SEALING RIDGES SNUGLY ENGAGING THE OPPOSITE WELL WALLS WITHOUT JAMMING.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538671A1 (en) * 1985-10-31 1987-05-07 Kloeckner Humboldt Deutz Ag Profile washer
DE202007007555U1 (en) * 2007-05-25 2008-10-09 Mann+Hummel Gmbh sealing arrangement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668067A (en) * 1950-07-11 1954-02-02 William J Fitzsimmons Rubber seal
US2692783A (en) * 1947-04-18 1954-10-26 Curtis D Foss Dust guard and seal for inner ends of journal boxes
US2758853A (en) * 1952-11-07 1956-08-14 Gen Tire & Rubber Co Journal box seal
US2872219A (en) * 1954-12-06 1959-02-03 Gen Motors Corp Demountable closure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692783A (en) * 1947-04-18 1954-10-26 Curtis D Foss Dust guard and seal for inner ends of journal boxes
US2668067A (en) * 1950-07-11 1954-02-02 William J Fitzsimmons Rubber seal
US2758853A (en) * 1952-11-07 1956-08-14 Gen Tire & Rubber Co Journal box seal
US2872219A (en) * 1954-12-06 1959-02-03 Gen Motors Corp Demountable closure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538671A1 (en) * 1985-10-31 1987-05-07 Kloeckner Humboldt Deutz Ag Profile washer
DE202007007555U1 (en) * 2007-05-25 2008-10-09 Mann+Hummel Gmbh sealing arrangement

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