US3805360A - Method and apparatus for sizing brake drum rings - Google Patents
Method and apparatus for sizing brake drum rings Download PDFInfo
- Publication number
- US3805360A US3805360A US00327309A US32730973A US3805360A US 3805360 A US3805360 A US 3805360A US 00327309 A US00327309 A US 00327309A US 32730973 A US32730973 A US 32730973A US 3805360 A US3805360 A US 3805360A
- Authority
- US
- United States
- Prior art keywords
- ring
- die
- cavity
- sizing
- set forth
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/34—Making other particular articles wheels or the like brake drums
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/10—Drums for externally- or internally-engaging brakes
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49718—Repairing
- Y10T29/49748—Repairing by shaping, e.g., bending, extruding, turning, etc.
Definitions
- ABSTRACT PP ,309 Method and apparatus for sizing lbrake drum rings of frustoconical cross section wherein the ring is inserted 52 U.S. c1 29/401 29/4205 72/345 axially a female Sizing die having a 51 Int. c1...: B221 3/24 B2l d 45/00 my frustnical Surface and axially relative 58 Field of Search 29/401 4205- 72/344 to the die Squeezed sufficiemly to take a Perm 72/345 nent set while undergoing axial elongation as it is pushed into the sizing die.
- the deformation is con- [56] References Cited trolled by the distance of ring entry into the die. The
- a brake drum with a sintered metal drum ring having cylindrical inner and outer surfaces and fixed to a sheet metal backing plate is disclosed in United States Pat. No. 3,500,972.
- Another brake drum generally of this type having an improved frustoconical contour is disclosed in a copending United States patent application of Alexander Brede III, Charles E. Schalla and Frank R. Tully, Ser. No. 255,230, filed May 19, 1972 and assigned to the assignee herein.
- drum rings of the same or similar configuration as that disclosed in said copending application Ser. No. 255,230 it has been found that after the drum ring has been compacted to high density and then sintered and allowed to cool the ring may have a small amount of distortion producing an out-of-round condition in the inner peripheral surface thereof.
- This surface must be held to within close circularity limits since it serves as the cylindrical brake track in the brake drum of which the ring is the chief component.
- This brake track surface may be brought into proper circularity or roundness by a machining operation, but this adds extra manufacturing cost and may introduce some unbalance into the drum, thereby tending to negate some of the advantages of forming the brake drum by powder metallurgy techniques.
- Another object is to provide method and apparatus of the above character which will enable drum rings produced with the above configuration from compacted and'sintered metal powder to be sized after sintering without any scrap loss in a mass production operatlon.
- a blend of iron powder and graphite is compacted into a ring having a frustoconical outer periphery and a cylindrical inner periphery.
- the compact After the compact has been sintered and cooled it is pressed endwise into a tapered female die in the direction of convergence of the die whereby the ring diameter is reduced by an amount that exceeds the elastic limit of the instered material in compression.
- This results in a permanent set in the material as it is cold worked by radial contraction and axial elongation in bringing the outer periphery of the ring essentially'to the die dimension at the end of sizing stroke.
- the circularity of the die is thus imparted throughout the ring to thereby reduce or eliminate the out-of-round condition of the ring.
- FIGS. 1, 2, 3 and 4 are semi-schematic vertical sectional views alongthe axis of one exemplary but preferred embodiment of a drum ring sizing apparatus of the present invention and sequentially illustrating schematically the operation of the apparatus in accordance with the method of the invention.
- FIG. 5 is a fragmentary vertical center section taken on the line 5-5 of FIG. 6 of one embodiment of a sizing die and press of the invention with the same shown in closed position at the end of the sizing stroke, corresponding to position of the parts shown in FIG. 3.
- FIG. 6 is a horizontal plan view of the apparatus of FIG. 5 at two elevations.
- Drum ring 10 is preferably compacted from a simple mixture of iron powder and graphite of relatively high density, in the order of 6.7 grams per cubic centimeter, in a compacting die set so that the configuration is essentially that of drum ring 10.
- the compact is sintered and then cooled, which may introduce a small amount of distortion into the sintered drum ring; i.e., the brake track surface 12 may have a slight ellipsoidal or oval shape with an unacceptable amount of out-ofroundness.
- This distortion can be removed by machining surface 12, but this is objectionable because it tends to negate one of the chief advantages of using powder metallurgy techniques; i.e., manufacturing complicated shapes to precise dimensions with little or no machining required. Machining to circularity also roughens the otherwise smooth finish imparted to surface 12 during the compacting operation, as well as imparting a possible unbalance to the ring in those cases where the distortion is of asymmetrical nature.
- FIGS. 14 includes a female sizing die 20 having a sizing cavity defined by a frustoconical surface 22 having a straight taper complementary to the outer periphery 14 of ring 10.
- the axial extent of die 20 is about twice that of ring 10.
- Die 20 is preferably oriented with its axis vertical with the large entrance end of the die cavity facing upwardly.
- the upper end surface 24 of the die 20 extends perpendicular to the axis of the die and is normally horizontal as indicated inFIGS. 1-4.
- the maximum diameter of surface 22, i.e., in the plane of surface 24, is greater than the outside diameter of surface 14 at end 18, and may be slightly less than, equal to or greater than the outside diameter of surface 14 at end 16 to permit fully insertion of ring 10 into the sizing cavity.
- the sizing apparatus also includes a central piloting core 26 extending coaxially of die 22 and having a cylindrical outer periphery 28 which preferably is slightly smaller in diameter than the inside diameter of surface 12 of ring 10 after sizing.
- the upper end surface 30 of core 26 is preferably flat and horizontal so as to lie flush with surface 24 of die 20.
- both die 20 and core 26 are mounted in fixed relationship to one another and are maintained stationary throughout the operation of the apparatus.
- the surface 28 of core 26 extends downwardly so as to be coextensive axially with surface 22.
- the apparatus also includes an ejector 32 in the form of a cylindrical annulus mounted to move coaxially of and radially between die 20 and core 26 with its inside cylindrical surface 34 having a close clearance fit relative to surface 28, and with its outside cylindrical surface 36 having a close clearance fit with the lower edge of surface 22.
- Ejector 32 is adapted to move between a raised position shown in FIGS. 1 and 4, wherein its flat upper end surface 38 is flush with surfaces 24 and 30, and a lowered position wherein surface 38 is spaced below the leading' end surface 18 of ring (FIGS. 2 and 3).
- the remaining principal component of the apparatus of the invention is a punch 40 mounted for movement coaxially of die from an elevated open position (FIGS. 1, 2 and 4) to a fully lowered position (FIG. 3).
- Punch 40 is also in the form of an annulus having inner and outer cylindrical surfaces 42 and 44 dimensioned similarly to the corresponding surfaces 34 and 36 of ejector 32.
- the lower end' surface 44 of punch 40 is preferably flat, or may be contoured to match the end surface 16 of ring 10, and thusin the example shown extends radially to make flat contact with surface 16.
- the next step is to lower ejector 32 from its raised position of FIG. 1 to its lowered position as shown in FIG. 2.
- ejector 32 begins its descent, ring 10 will drop by gravity with the ejector into the cavity of die 20 until the outer surface 14 of the ring makes initial seating contact with the sizing surface 22 of the die 20.
- this'condition is reached with ring 20 in the position shown in FIG. 2 wherein the ring has been inserted about two-thirds of its axial dimension into the die cavity.
- the extent of insertion of the ring into the cavity will, of course, vary depending upon the degree of out-of-roundness, diameter variation and/or distortion present in ring 10.
- the range of distortion in rings being received for sizing thus must be taken into account in deciding the entrance diameter of the die cavity.
- the axial extent of surface 22 may be increased so that the entrance diameter of the die cavity is equal to the maximum outside dimension of the drum ring having the greatest distortion. In such a case,
- the drum rings when lowered for initial insertion into the die cavity will not reach initial seating contact until the ring has been at least fully inserted into the die cavity so that its upper surface 16 is flush with or below surface 24.
- punch 40 is lowered in a smooth continuous stroke wherein its lower end face 44 contacts the end face 16 of ring 10 to force the ring axially a given distance along the wall 22 of the cavity of die 20.
- a radial compression force is applied inwardly of the drum ring progressively about its entire circumference and generally simultaneously along the entire axial length of the peripheral contact zones of the ring.
- punch 40 is lifted clear of ring 10 to its elevated position shown in FIG. 4 and then ejector 32 is raised from its position in FIG. 3 to its position in FIG. 4 to thereby reverse the axial forces applied to the ring.
- Due to the tapered surface 22 of the die cavity as soon as ring 10 is moved a short distance upwardly from its position in FIG. 3, it will be uniformly released about its entire outer periphery from the wall 22, thereby facilitating ejection of the ring and minimizing die wear.
- the pusher engages the outer periphery of the ring and slides the same horizontally in the direction of the arrow in FIG. 4 to clear the sizing die for reception of the next ring to be sized, whereupon the above-described sizing cycle is repeated on the next workpiece.
- the axial dimension of surface 22 of the die cavity is established so that the trailing end surface 16 of ring 10 will be at least flush with and preferably slightly below the upper end surface 24 of die 20 by the time that the ring has progressed far enough axially into the die to enable the progressively increasing interference fit to bend the ring from its out-of-round shape to a true circle.
- ring 10 in its first stage of axial forced travel into die 20, ring 10 is fully seated within the die cavity and in substantially complete engagement about its entire outer periphery with wall 22 before any radial compression of the ring takes place.
- the final inside dimension of surface 12 is preferably controlled by empirically testing the sample workpiece to determine the distance required to advance the workpiece from its fully seated condition to its fully sized and stressed position without surface 12 contacting surface 28. This obviates such problems as wearing of the pilot core 30 and seizure of the ring on the same.
- Any suitable die lubricant may be used to lubricate the outer periphery 14 of the workpiece and the die cavity wall 22.
- the outer contour of ring 10 is a straight taper, the minimum angle thereof being determined by the ejection force available taking into consideration the coefficient of friction of surface 14 relative to cavity wall 22.
- the maximum taper of surface 14 is determined by the limitations of press and die capacity and thus could be well in excess of the taper angle given in the example above, say up to about 15 included angle.
- surface 14 is smooth, but surfaces having ribs therein can be sized in the method of the invention if the ribs are uniformly spaced around the periphery and the crowns of the ribs extend axially from one end of the ring to the other along surface 14 or terminate at and merge into a smooth peripheral surface in flush relationship therewith.
- FIGS. 5 and 6 a brake drum ring sizing press constructed pursuant to the presentinvention and capable of performing the above-described method of the invention is shown with like reference numerals applied to the components thereof corresponding to the components illustrated schematically in FIGS. l-4.
- Die 20 is seated in and detachably secured to a bolster 50 stationarily mounted on the bed or frame 52 of the press, and likewise pilot core 26 is detachably secured to bolster 50.
- Punch 40 is detachably secured to a platen 54 of the press so as to reciprocate vertically with the drive train of the press in a conventional manner. Suitable guide pins 56 may be provided to assure parallelism of punch 40 with the axis of die 20.
- the ejector 32 is raised and lowered on a series of actuator pins 58 which in turn rest on the platen 60 of a hydraulic ram 62 mounted beneath bed 52 of the press.
- the remaining details of the construction of the press as well as the appropriate control equipment to control the motion of the movable parts of the press in accor' dance with the operation described previously will be well understood by those skilled in the art and therefore not described in detail herein.
- the apparatus of FIGS. 14 may be inverted, and core 26 eliminated, and die 20 arranged as the movable member to be brought downwardly onto ring 10 while the ring is stationarily supported on punch 40. Stripping may be then accomplished with ejector 32.
- ejector 32 can be yieldably lightly biased toward ring 10 to maintain contact therewith throughout the cycle so that ejector 32 can support the weight of ring 10 without exerting significant resistance to axial elongation of the ring.
- the size of the workpiece can vary as to the diameter of surface 12 from say 5 to 20 inches and axially from 2 to 10 inches, and the axial travel in the second stage may vary from about 0.2 to 2.0 inches.
- a method of sizing an out-of-round brake drum ring compacted and sintered from metal powder and having a frustoconical outer peripheral surface tapering linearly toward the axis of said ring toward one of the ends of said ring comprising the steps of positioning the ring coaxially on a sizing die having a sizing cavity with a frustoconical peripheral surface tapered complementarily to said outer ring surface and of substantially perfect circularity for an axial distance exceeding the axial dimension of said ring, said cavity tapering from a diameter greater than to less than the outside diameter of said one end of said ring, bringing said ring into circularity by moving said ring and die axially relative to one another in the direction of increasing interference fit of said ring in said die cavity by applying axial force endwise to said ring and an opposing axial force to said die while leaving said ring unrestrained against movement in said direction except for the sliding frictional interengagement of said ring and cavity surfaces, terminating said movement after a predetermined relative axial
- said positioning step further comprises elevating an ejector annulus within said cavity to bring an end surface of said ejector flush with said flat end surfaces, then sliding said ring into said registry to position the ring on said ejector end surface, and then lowering said ejector to lower said ring into engagement with the sizing surface of said die cavity.
- said ring is made by compacting and sintering a metal powder blend comprising iron, graphite and wax and adpted to provide a pearlitic microstructure.
- drum ring has an inside diameter in the order of about five to twenty inches and an axial dimension in the order of 2 to 10 inches.
- a method of making a brake drum ring comprising the steps of compacting a brake drum ring from metal powder blend containing primarily iron powder into a ring shape having a trapezoid radial cross section with a frustoconical outer peripheral surface tapering linearly toward the axis of said ring toward one of the ends of said ring, sintering the ring compact and then cooling the same whereby said ring may be distorted to an out-of-round condition, positioning the ring coaxially in a sizing die cavity having a frustoconical peripheral surface tapered complementarily to said outer ring surface from a diameter greater than to less than the outside diameter of said one end of said ring and being of substantially perfect circularity for an axial distance exceeding the axial dimension of said ring, bringing said ring into circularity by moving said ring and die axially relative to one another in the direction of increasing interference fit of said ring in said die cavity by applying opposing axial forces endwise to said ring and said die while leaving said
- Apparatus for sizing an out-of-round brake drum ring compacted and sintered from metal powder and having a frustoconical outer peripheral surface tapering linearly toward the axis of the ring toward one of the ends of the ring comprising a sizing die having a sizing cavity with a frustoconical peripheral surface tapered complementarily to the outer surface of the ring and of substantially perfect circularity for an axial distance exceeding the axial dimension of the ring, said cavity tapering from a diameter greater than to less than the outside diameter of said one end of the ring, means for moving said ring and die axially relative to one another in the direction of increasing interference fit of said ring in said die cavity, said moving means being adapted to apply axial force endwise to said ring and said die while leaving said ring unrestrained against movement in said direction except for the sliding frictional interengagement of said ring and cavity surfaces, said moving means being operable to terminate said movement after a predetermined relative axial travel of said ring along said cavity
- said die is oriented with its axis vertical with its entrance end facing upwardly, and further including a pilot core positioned concentrically within said die cavity to provide a flat end surface flush with a flat end surface to said die to form therewith a support surface extending perpendicular to the axis of said cavity, and means for sliding said ring on said one end thereof perpendicular to the ring axis along said support surface into coaxial registry with an annular cavity defined between said pilot core and said die cavity surface, said pilot core being dimensioned so as to pilot through said ring prior to said ring being deformed by said die.
- said ring removing means comprises an ejector annulus movable axially within said cavity to bring an end surface of said ejector flush with said flat end surfaces, said sliding means being operable to move said ring into said registry on said ejector end surface, said ejector thereupon operating to lower said ring into engagement with the sizing of said die cavity.
- the apparatus set forth in claim 20 including support means for maintaining said die stationary, and wherein said moving means is operable to move said ring into and out of the entrance of said die cavity to accomplish said relative axial movement in both of said directions.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
- Braking Arrangements (AREA)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00327309A US3805360A (en) | 1973-01-29 | 1973-01-29 | Method and apparatus for sizing brake drum rings |
CA189,767A CA1001865A (en) | 1973-01-29 | 1974-01-09 | Method and apparatus for sizing brake drum rings |
JP49009171A JPS49104074A (ja) | 1973-01-29 | 1974-01-21 | |
IT47863/74A IT1008735B (it) | 1973-01-29 | 1974-01-22 | Dispositivo e procedimento per la coniatura a misura in particolare per tamburi di freni |
GB351474A GB1453114A (en) | 1973-01-29 | 1974-01-25 | Manufacture of brake drums |
DE19742403729 DE2403729C3 (de) | 1973-01-29 | 1974-01-26 | Verfahren und Vorrichtung «um Formkorrigieren eines Metallpulver-Slnter/Inges, insbesondere Bremstrommelringes |
FR7402752A FR2215275B3 (ja) | 1973-01-29 | 1974-01-28 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00327309A US3805360A (en) | 1973-01-29 | 1973-01-29 | Method and apparatus for sizing brake drum rings |
Publications (1)
Publication Number | Publication Date |
---|---|
US3805360A true US3805360A (en) | 1974-04-23 |
Family
ID=23276035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00327309A Expired - Lifetime US3805360A (en) | 1973-01-29 | 1973-01-29 | Method and apparatus for sizing brake drum rings |
Country Status (6)
Country | Link |
---|---|
US (1) | US3805360A (ja) |
JP (1) | JPS49104074A (ja) |
CA (1) | CA1001865A (ja) |
FR (1) | FR2215275B3 (ja) |
GB (1) | GB1453114A (ja) |
IT (1) | IT1008735B (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100084780A1 (en) * | 2006-05-04 | 2010-04-08 | Lindh Sr David | Tissue holding devices and methods for making the same |
US9101980B2 (en) | 2010-06-10 | 2015-08-11 | Miba Sinter Austria Gmbh | Compacting device |
CN105234405A (zh) * | 2015-10-14 | 2016-01-13 | 东睦新材料集团股份有限公司 | 一种具有致密化表面的铁基粉末冶金零件的制备方法 |
US9929304B2 (en) | 2013-01-04 | 2018-03-27 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method and system for forming absorber layer on metal coated glass for photovoltaic devices |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115041569B (zh) * | 2022-08-12 | 2022-11-04 | 龙口市智兴机械制造有限公司 | 一种汽车配件加工用安全型冲压设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3423A (en) * | 1844-02-02 | Wheat-fan | ||
US439883A (en) * | 1890-11-04 | Machine for repairing spinning-rings | ||
US3677655A (en) * | 1970-11-05 | 1972-07-18 | James Ratteree | Brake drum truing method and apparatus |
US3676917A (en) * | 1970-11-10 | 1972-07-18 | Merriman Inc | Method of making a porous metal spinning ring |
-
1973
- 1973-01-29 US US00327309A patent/US3805360A/en not_active Expired - Lifetime
-
1974
- 1974-01-09 CA CA189,767A patent/CA1001865A/en not_active Expired
- 1974-01-21 JP JP49009171A patent/JPS49104074A/ja active Pending
- 1974-01-22 IT IT47863/74A patent/IT1008735B/it active
- 1974-01-25 GB GB351474A patent/GB1453114A/en not_active Expired
- 1974-01-28 FR FR7402752A patent/FR2215275B3/fr not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3423A (en) * | 1844-02-02 | Wheat-fan | ||
US439883A (en) * | 1890-11-04 | Machine for repairing spinning-rings | ||
US3677655A (en) * | 1970-11-05 | 1972-07-18 | James Ratteree | Brake drum truing method and apparatus |
US3676917A (en) * | 1970-11-10 | 1972-07-18 | Merriman Inc | Method of making a porous metal spinning ring |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100084780A1 (en) * | 2006-05-04 | 2010-04-08 | Lindh Sr David | Tissue holding devices and methods for making the same |
US8216497B2 (en) * | 2006-05-04 | 2012-07-10 | Ethicon, Inc. | Tissue holding devices and methods for making the same |
US9101980B2 (en) | 2010-06-10 | 2015-08-11 | Miba Sinter Austria Gmbh | Compacting device |
US9929304B2 (en) | 2013-01-04 | 2018-03-27 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method and system for forming absorber layer on metal coated glass for photovoltaic devices |
CN105234405A (zh) * | 2015-10-14 | 2016-01-13 | 东睦新材料集团股份有限公司 | 一种具有致密化表面的铁基粉末冶金零件的制备方法 |
CN105234405B (zh) * | 2015-10-14 | 2017-09-12 | 东睦新材料集团股份有限公司 | 一种具有致密化表面的铁基粉末冶金零件的制备方法 |
Also Published As
Publication number | Publication date |
---|---|
FR2215275A1 (ja) | 1974-08-23 |
JPS49104074A (ja) | 1974-10-02 |
DE2403729B2 (de) | 1976-09-09 |
DE2403729A1 (de) | 1974-08-01 |
CA1001865A (en) | 1976-12-21 |
IT1008735B (it) | 1976-11-30 |
FR2215275B3 (ja) | 1976-11-19 |
GB1453114A (en) | 1976-10-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CONGRESS FINANCIAL CORPORATION, 100 SOUTH WACKER D Free format text: SECURITY INTEREST;ASSIGNOR:MOTOR WHEEL CORPORATION;REEL/FRAME:005392/0671 Effective date: 19900615 |
|
AS | Assignment |
Owner name: MOTOR WHEEL CORPORATION, MICHIGAN Free format text: RELEASE AND TERMINATION;ASSIGNOR:CONGRESS FINANCIAL CORPORATION (CENTRAL);REEL/FRAME:008098/0455 Effective date: 19960702 |