|Publication number||US1911531 A|
|Publication date||May 30, 1933|
|Filing date||Oct 20, 1930|
|Publication number||US 1911531 A, US 1911531A, US-A-1911531, US1911531 A, US1911531A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (7), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
May 30, 1933. R. RODERWALD DRIVING MECHANISM FOR AXLE DRIVEN TRAIN LIGHTING DYNAMOS Filed 001;. 20, 1930 7 Sheets-Sheet 1 May 30, 1933. R. RODERWALD 1,911,531
DRIVING MECHANISM FOR AXLE DRIVEN TRAIN LIGHTING DYNAMOS Filed Oct. 20, 1930 7 Sheets-Sheet 2 32 3 v BNVENTU:
May 30, 1933. R. RODERWALD 1,911,531
DRIVING MECHANISM FOR AXLE DRIVEN TRAIN LIGHTING DYNAMOS 7 Filed Oct. 20, 1930 7 Sheets-Sheet 3 INVENTUR= y 1933- R. RODERWALD 1,911,531
DRIVING MECHANISM FOR AXLE DRIVEN TRAIN LIGHTING DYNAMOS Filed Oct. 20. 1930 7 Sheets-Sheet 4 22 4 5 f: 13 Y \\\\T mu! I I:::z -4
May 30, 1933. 1 R. RODERWALD 3 L5 DRIVING MECHANISM FOR AXLE DRIVEN TRAIN LIGHTING DYNAMOS Filed Oct. 20, 1930 7 Sheets-Sheet 6 F1922. I I8 a U 2/ Fig.23.
"-" g INVENTUR W a y l 24 2:7
May 30, 1933. R. RODERWALD DRIVING MECHANISM FOR AXLE DRIVEN TRAIN LIGHTING DYNAMOS Filed Oct. 20, 1930 7 Sheets-Sheet 7 mvmmw O O O O O 0 O Patented. May 30, 1933 UNITED STATES PATENT orrlca BUDOLF RODELRWAIJD, OF BERLIN, GERMANY, ASSIGNOR 'IO' THE DAYTON RODERWALD COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO DRIVING- MECHANISM FOR AXLE-DRIVEN TRAIN LIGHTING DYNAMOS' Application filed October 20, 1930, Serial No.
There is a'series of factors which require cushioning of such driving mechanisms against undue strains, especially against shocks due to sudden starting or stopping and to the irregularities of the rails and furthermore against strains or stresses due to the movements of the axle with respect to the truck frame or car.
It is the main object of my mvention to absorb an essential part of t e said shocks or stresses by an elastic belt, preferably a \/-type belt of rubber impregnated cloth and to absorb the resting part of these shocks or stresses by elastic means, especially elastic joints or the like, so that the dynamo is held free from these shocks and the driving mechanism is absorbing successively all stresses, whereby the driving mechanism and the dynamo become adapted to resist to all accidents in the train handling. Therefore it is the object of my invention'to employ in combination an elastic belt and an universal joint in the said driving mechanism.
It is a further object of my invention to maintain a constant tension of the belt employed in the said combination irrespective of any fore and aft or lateral movement of the car axle and therefore to employ in combination with the said. elastic belt and universal joint a yielding connection, ensuring a constant tension of the said belt and an adjustment of this tension during lateral movements of the axle.
As such a yielding connection I propose to employ a rotatively mounted hanger, the mounting allowing the hanger to swing in a plane parallel to the running plane of the belt, a tension spring ensuring always the proper driving tension.
I furthermore intend to provide means,
whereby the driving ratio may be altered in great extent. I obtain this result by employing or inserting in my driving mechanism a plurality of devices the gearing ratio of which may be altered.
For instance the pulleys for the belt may form the first device, gearing wheels, transmitting the force from the driven pulley to the said universal joint may form the second device, beveled gear wheels transmitting 489,920, and in Germany October 21, 1929.
tight, on account of the fact, that it is traversed by this axle.
the force from the universal joint to the A further advantage of the V-ty'pe belt is to run easier on its pulleys than a wide face belt or unelastic Morse-chain and to automatically adjust the belt position duning lateral movements of the car axle.
I also intend to ensure an uninterrupted service with a minimum amount of attention and this result is obtained by providing two belts running parallelto each other, each of which being so dimensioned as to be enabled to take over the total load when the other belt is broken.
A further object of my invention is to facilitate the control of the driving mechanism and to provide means, whereby the belt of the mechanism may be protected against outer adverse influences of all kinds.
Further objects of my invention will arise from the following text, which is a clear description of my said invention.
In the accompanying drawings Fig. 1 is a side view and Fig. 2 a front view of a construction, embodying my invention, Fig. 3 shows in a greater scale a horizontal cross section on the line III-J11 of Fig. 1, Fig. 4.
shows the front view of a. detail of the construction illustrated in Fig. 3, Figs. 5 and 6 are respectively a top and a front view of an axle extension-piece, fixed to the end of the axle, the latter being illustrated in Fig. 5 partly in section, Figs. 7 and 8 are "similar views as those shown in Figs. 5 and 6 and illustrate a modification, Fig. 9 is a horizontal cross-section similar to that of Fig. 3 showing a modification thereof adapted to provide a box for protecting the belt and pulleys, Fig. 10 is a side View ofFig. .9, Fig. 1
11 a horizontal cross section similar to that of Fig. 3, showing afurther modification, Fig. 12 shows an universal joint shaft broken away at both ends, Fi 13 is a front view of the joint shown in Flg. 12, Figs. 14 and 15 are respectively a sectional and top View of a modification of my invention, the section of Fig. 14 being on line XIV-XIV of Fig. 15, Figs. 16 and 17 are respectively a sectional and a top view of a further modification of my invention, the section of Fig. 16 being on. line XVI-XVI of Fig. 17, Fi 18 is a front view, Fig. 18a is detail 0 Fig. 18 Fig. 19 a top view and Fig. 20 a top view of three further modifications, and Fig. 21 a perspective view of a detail of the Fig. 20.
Figs. 22, 23 and 24 show respectively a side, a sectional and a top view of a still further modification, the section of Fig. 23 being on line XXIII-XXIII of Fig. 22. Figs. 25 and 26 show two different modifications of a detail of the embodiment of the Figs. 22-24 in side elevation partly broken away, Fig. 27 shows a side-and Fig. 28 a top-view of a last modification, Fig. 29 shows a side view of a ulley and Fig. 30 a section on line XXX XXX of Fig. 29.
The mechanical energy for the driving mechanism according tomy invention is derived from the axle 1 inside or outside the car-wheels 2. I prefer to derive it outside in order to have better access to the parts for controlling and replacing and in order to be enabled to mount an unsplit driving element on the car axle. In the modification shown in Figs. land 2 II have employed the outside arrangement. The axle 1 is provided with an extensionBr This extension has a middle cylindrical part 4, a conical part 5 and a screw threaded part 6. Integral with the cylindrical part 4 is a disc 7, and integral with the .disc 7 is a segment 8 with parallel end walls 9. The axle 1 is provided with a recess 10 to be entered by the said segment 8 and with four screw threaded holes into which screws 11 are screwed in.
The cylindrical part 4 supports the cover 12 of the axle-bearingbox and the conical part 5 supports the pulley 13. The oil su ply 14 is located inside the cover 12 and t e pulley 13 has its periphery likewise retracted to inside, so that ,the assembly of these parts remains inside the rescribed outline of railway cars. As seen rom the drawings relatively simple and compact parts are used in all my constructions.
In the modification of the axle extension illustrated in the Figures 7 and 8, the disc 7 is held by four screw bolts 15,. Four prisonpins 16 ensure the coincidence of the axis of the axle extension piece with the axis of the axle 1. In this modification the axle 1 is not weakened and the mounting of the extension piece is facilitated.
Fixed to the truck frame 17 is a bracket 18 and pivotall mounted therein is a hanger'19. The ower end of the hanger 19 forms the bearing for the shaft 20 of the pulley 21, which is driven by the pulley 13 by a belt 22 and fixed to the hanger 19 or integral therewith is a gearing box 23, containlng two ear wheels 24 and 25, meshing with each ot er. terchangeable in order to alter the driving ratio. The gear wheel 24 with the greater diameter is fixed to the said shaft 20 and transmits its rotational energy to the gear wheel 25 fixed to the end of an universal joint shaft 26, the other end of which is driving the generator 27, which is adjust ably fixed to the truck frame 17.
The said hanger is spring influenced by an adjustable screw spring 28, which tends to normally ull the lower end of the hanger and the pul ey 21 in a direction awa from the axle 1 and thereby to place the elt 22 under the proper driving tension and to adust the same when the car is passing curves. When it is desired to protect the pulleys 13 and 21 and the belt 22 by a box I provide the cover of the axle bearing box with a flange 29 (Fig. 9) adapted to sup ort a box 30 of the form as illustrated in t e Figs. 9 and 10. The outlet of the shaft 20 is ti htened by two discs 20 of coal or the like, travelling with this shaft 20 when swinging in the curved slot 31 around the pivot of the hanger 19.
In the modification shown in Fig. 11 a pulley 32 for two beltsis shown. When each of these belts is so dimensioned as to sustain the total load, the security for an unlnterrupted service is obtained, when one of the belts is breaking. In order to prevent that the broken belt interferes with the other, tiges 33 or a grate may be provided between the two belts.
The Figs. 12 and 13 show one of the universal joints of the shaft 26 (Fig. 2). Three-armed parts 34 and 35 are so located relatively to each other, that the three arms of the one part lie between the arms of the other part. i
Between both parts 34 and 35 a rubber disc 36 is provided and screw bolts 37 interconnect the rubber disc with the arms.
In the modification shown in Figs. 14 and 15 the rotational energy is derived from the axle 1 inside the wheels 2 by a split pulley 13 and transmitted by the belt 22 'to the pulley 21. Fixed to the sills 38 are bearings 39, in which is fixedly held a shaft 40. Pivotally mounted thereon is a hanger 19.
The lower end of the hanger 19 forms the bearing 68 for the shaft 20 of the pulley 21, which is driven by the pulley 13*.by the belt 22 and fixed t0 the hanger 19 or integral therewith is a gearing box 23, containing two gear wheels with a desired driving ratio. The gear wheel with the greater These gear wheels are in diameter is fixed to the said shaft 20 and meshes with the gear wheel of the smaller diameter which latter gear wheel is supported within the box by the end of an universal joint shaft 26, the other end of which is driving a bevel gear 41 meshing with a bevel pinion 42. The gear box 43 containing the bevel gear and pinion is held on the one hand by the shaft 40 and on the other hand fixed to the truck frame 17.
The bevel inion 42 is fixed to a second universal sha t 26 driving the generator 27, which is not illustrated in this modification and may be fixed by brackets to the truck frame or to the car. The hanger 19 is spring influenced by an adjustable screw Spring 28, in the manner as described above.
which the driving T211310 may, be altered I am enabled to ensure a considerable total driving ratio of say 3.:10. Moreover I am enabled to use pulleys of nearly the same diameter for instance 400 mm:300 mm. In this way the great pulley becomes smaller and the small pulle becomes greater.
Therefore it is acilitated to locate the greater pulley whereas the small pulley, the
diameter of which becomes greater ensures a longer life of the belt, becausethe belt is not so sharply bent on a greater pulley.
The modification of the Figures 16 and 17 differs from that just described substantially in that the hanger is inverted and the driving ratio of the beveled gear wheels is 1: 1.
The rotational energy is derived from the axle 1 b the inside mounted pulley 13 which drives by the belt 22 the pulley 21.
Fixed to the truck 17 is a bracket 18 and pivotally mounted on the free end of this bracket is an inverted hanger 19 the upper end of which supports a bearing box 44 provided with an eye 45. The bearing box 44 sup orts the shaft 20 of the pulley 21. The sai hanger 19 is spring influenced by an adjustable screw spring 28, which tends to normally pull the upper end of the hanger and the pulley 21 in a direction away from the axle 1 and thereby to place the belt 22 under the proper driving tension and to adjust the same when the car is passing curves, 1n the same manner as pointed out above.
The said spring 28 tends to normally pull the lower The spring 28 considerably assists the belt in its elasticity, with the result that all sudden strains and shocks are elastically absorbed by the belt and hanger. Mounted on and fixed to the free end of the shaft 20 is the one of two gear wheels, meshing with a second gear wheel. Both ear wheels are enclosed in a box 23 which is integral with the said bearing box 44.
The said second gear wheel is mounted on an universal joint shaft 26 the other end of which is held in a bracket 46, which is fixed to the truck 17 Fixed to the free,end of the universal joint shaft 26 is a bevel gear wheel 47 meshing with a gear wheel 48, which is mounted on and fixed to a shaft 49. This shaft terminates in the coupling of an universal joint. shaft 26 transmitting the force to the dynamo mounted on the car.-
The modification of Fig. 18 shows an advantageous mounting of the driving mechanism on passenger-cars with two or three axles. As seen the transmission of the force is the same as described above.
The force is derived inside the wheels 2 from the axle 1 and transmitted by pulley 13 belt 22, pulley 21, shaft 20, gear wheels 24, 25 of the box 23 to the universal joint shaft 26 and dynamo 27. In order to support the hanger and the dynamo, a shaft 50 and symmetrically arran ed to it a shaft 51 is provided, whereas a rthershaft 52 is provided somewhat laterally to the shafts 50 and 51, but in the same level as the shafts 50 and 51 and nearly in the middle between them. The shafts 50, and 51 are held and supported by the main frame 53 and by the sills 54 of the normal frame, whereas the shaft 52 is'supported by the sills 54 alone. The shaft 50 forms the pivot for the hanger 19, and on the shaft 51 the dynamo 27 is supported. The shaft 52 supports the holder 55 for the adjustable screw spring 28 and supports also a link 55, the under end of which is connected to an eye 56 0f the dynamo, so that the latteris rigidly suspended.
In the modification shown in'the Fig. 19 the rotational energy isderived outside the wheels 2 from the axle 1 by a bevel gear 57 fixed to the axle 1 and meshing with a' gear wheel 58. Both bevel gears are protected by a box 59, which forms the bearing for the one end of an universal joint shaft26, to which the said bevel gear wheel 58 is fixed to. The other end of the said shaft 26 is supported by a bracket 60. Near to the end of the shaft 26* and fixed thereto between branches of the said bracket is a pulley 13 which drives by a belt 22 a pulley 21 The latter is mounted on and fixed to a shaft 61, which is fixed in the free end .of a hanger 19. The one end of this shaft61 enters a box 23 and supports inside this box the greater of two gear Wheels. The other end of the said shaft 61 is spring influenced in the manner and sense as described above Supported on a bracket 64 is a bearin 63. J ournalled in this bearing 63 and in a aring not shown mounted onthe truck 17 is an universal .joint shaft 26, on which the hanger 19 is pivotally mounted and which v transmits the rotational energy to a dynamo fixed to the car body. The spring 28 tends the axle 1 and transmitted to a bevel gear corporated 58 and universal joint shaft 26. In this modification however the force is transmitted by a second pair of bevel gear wheels 65 and 66. These wheels are lod ed in a box 62 sup rted by a bracket 67 xed to the truck 1 Supported by the said box 62 are the mentioned shaft 26 and an universal joint shaft 26, the other end of which is journalled in the free end of a hanger 19 and is spring influenced. Between the arms of the hanger 19 a pulley 13 is fixed to the shaft 26.
- This pulley drives by a belt 22 a pulley 21 and the pulley 21 drives the d namo 27 which may be fixed to the truck 1 or to the car body as desired. I
Selfevidently my invention may be inin various other alternative structures. For instance the last described structure can be so modified, that instead of the pulle 13. bevel gear wheels are arranged t e smaller driving an universal joint shaft 26, which is so arranged as the shaft 26 in Fig. 19. A further modification would result when instead of the dynamo in Fig. 1 bevel gear wheels were arranged, the smaller gear wheel driving a shaft 26 arran ed in the same manner as the shaft 26 in ig. 19.
The universal joint shaft 26. of Figs. 19
and 20 is made of two parts adapted to be shifted relatively to each other. A pris matical section of the one part and prismatical hollow of the other part prevents rotation of the one part relatively to. the other part. A spring 67 ensures the uninterrupted engagement of the bevel gear wheels 57 and 58 during lateral movements ofv the axle 1'. I
In the modification shown inFigs. 22-24 the axle bearing box 69 is enlarged by 2. casing 70 fixedly mounted thereon. Contained in this casing 70 is a casing 71, the latter being provided with openings 72 for the en-, trance of the oil. Contained in the casing 71 are gear wheels 73 and 74, thegeariwheel 73 being mounted on and fixed to an axle extension 3 and the gear wheel 74 being mounted on and fixed to a shaft 75.. The
one of the ends of this shaft supports a pulparts 69 and 70, the said sieve being adapted to hold the axle and axle bearing cup free from all solid bodies ofany kind.
This embodiment has a plurality. of speclal advantages. The oil chamber for the axle bearing box 69 is considerably increased. Oil cannot be lost on account of the high position of the shaft 75. The belt 1s likewise in a very high position and therefore better protected against snow, flying stones and so forth. The axle 1 is continuously furnished with oil, the latter being lifted by the wheels 73 and 74 and sprayed against the inner surface of the casing 71. It drops from the edge 76 into the recess or receptacle 78 and is guided to the bearm cup and to the axle. .1 I
riven by the pulley 13 by means of a V-ty belt is a pulley 21?, the' shaft 20 of WhlC is beared in the free end of a hanger 19, which is supported b a bracket 19 fixed to the frame 17 and is in uenced by a spring 28 and an universal joint shaft 26 drives the dynamo 27 .all substantially in the same manner as described above. In this em-.
bodiment the spring 28 is free from the weight of the gear box wit gearing wheels ggar wheels have to transmit a smaller numf r of revolutions per minute so that their life is prolonged.
In order to lift a sufiicient uantity of oil the wheel 73 may be provided with a recess 79 and with channels 80 spraying out the lifted oil as shown in Fig. 25 or wings 81 (Fig. 26) may be provided for the same purpose.
In the modification shown in Fi s. 27 and 28 the axle is provided outside t e wheels 2 with an axle-extension piece 3 supporting a pulley 82. Between the pulley 82 and a driven pulley 87 further pulleys 84 and 85 with a driving ratio are inserted, The pulle 82 drives by a belt 83 the pulley 84. Fixed thereto is the pulley 85, which drives by a pulley86 the said pu ley 87. The pulleys 84 and 85 are supported b an axis 88, which is beared in the free en ofa spring influenced hanger 19. This hanger is journalled on the upper end of an arm 89, which is held in a 7 bearing box 89 fixed to the frame 17 The pulley 87 is fixed to the outer end of an universal joint shaft 26, held by a bracket 90 on the frame 17. The said universal joint has openings 92 between the webs 95, so that foreign bodies as for example snow or the like may find an exit through the apertures 94 and 95. g
6 In all modifications above described a plurality of elastic transmitting means and a V-type belt of rubber impregnated cloth are employed, the different elastic transmitting means being arranged rectangularly to 10 each other. I obtain in this way a successive absor tion of all shocks and strains, the belt absorhing the most part of it and the dynamo remaining free therefrom. Gearing boxes transversed by the car axle are prevented, so that the driving mechanisms according to my invention do not require at tention and lubrication, the gear wheels running in closed boxes filled with oil. ,The
V-type belt ensures an exact and correct running even in curves and the combination with the hanger ensures the proper tension under all influences. The plurality of points with a driving ratio ensures a considerable total driving ratio. The arrangement of the several parts of the drivin mechanism may be modified as desire that means that the rotational energy may be derived outside or inside the wheels and that the transmitting means may be located inside or outside of the truck. I prefer to derive the rotational energy outside the wheels in order to have better access to the mechanism and to facilitate the mounting.
Although I have illustrated modifications of this manner, the elastic transmitting means of which being arranged outside the truck, it is clear, that they may also be arranged inside the truck, in combination with the driving belt outside the wheels without 4 leaving the spirit and scope of my invention. The gear wheels being interchangeable, it is possible to meet all requirements with respect to the speed of the dynamo.
The latter is rigidly fixed to the truck frame or car body, is however adjustable f. i. by a screw bolt 27 (Fig. 2). If desired the spring infiuenced 'fhanger may be replaced by a spring influenced slide. The employed V-type belt ensures a considerable elasticity and the spring influenced hanger combined with the belt ensures an automatic adjustment of the drivingtension during lateral, fore and aft movements of the axle. This automatic adjustment is facilitated when the gearin box 23 or 23 is somewhat displaced from t e spring influenced hanger and is located more adjacent to the dynamo 27 instead of being located adjacent to the said hanger.
By sucn displacement the spring 28 is substantially free from the load of the said box and from the weight of the gear wheels contained therein.
Alternative structures difi'ering in the mutual arrangement of the several parts and in their location inside or outside of the wheels or truck frame are evidently equivalent to the structures described above and I can'thererore resort in any event to all such changes, which may be fairly incorporated within the spirit and principle of my above described invention.
What I claim is; j
1. In a driving mechanism for axle driven train lighting dynamos the combination of a plurality of elastic transmitting means arranged rectangularly to each other, one of which being formed by a V-type belt of rub- -ber impregnated cloth, a pulley mounted on the end of said axle and engaged by the said belt, a second swinging pulley driven by the said belt and an universal 'oint shaft rectangularly arranged to the said belt and driven by the driven pulley and a dynamo driven by the said shaft.
2. In a driving mechanism for axle driven train lighting dynamos a pulley on the end of said axle, a belt, a second pulley driven by the said belt, a spring influenced hanger pivotally mounted and supporting the said second pulley and adapted to swing in the direction of the said belt and to adjust.
thereby the belt tension, a pair of spur gear wheels, the one being driven by the said second pulley and the other driving an universal joint shaft arranged rectangularly to the said belt and a dynamo driven by this shaft.
3. In a driving mechanism for axle driven train lighting dynamos a pulley on the end of said axle, a belt, a second pulley, driven by the said belt, a spring influenced hanger pivotally mounted and supporting the said second pulley and adapted to swing in the direction of the said belt and to adjust thereby thebelt tension, an universal joint shaft driven by the said second pulley, the said shaft driving a dynamo and gear wheels between the said second pulley and the said dynamo, the said gear wheels beinginterchangeable to vary the rotational speed of the said dynamo.
.4. In a driving mechanism for axle driven train lighting dynamos a pulley mounted outside the car-wheel on the said axle, a V-type belt,a second pulley driven by the said belt, a spring influenced hanger pivotally mounted and supporting the saidv second pulley and adapted to swing in the direction of the said belt and to adjust thereby the belt tension, a pair of spur gear wheels, the one being driven by the said second pulley and the other driving an universal joint shaft arranged rectangularly to the said belt and a dynamo driven by this shaft.
5. In a driving mechanism for axle driven train lighting dynamos a pulley mounted outside the car-wheel on an axle-extensionpiece, the latter being provided with a disc,
hanger being su axle, a
the said disc being held by screws on the said axle, a V-type belt, a second pulleydriven by the said belt, a spring influenced hanger pivotally mounted and supporting the said second pulley and ada ted to swin in the direction of the said bet and to a just thereby the belt tension, a pair of spur gear wheels, the one bein driven by the said second pulley and the ot er driving an universal joint shaft arranged rectangularly to tlfiefsaidbelt and a dynamo driven by this s a t.
6. In a driving mechanism for axle driven 7 train lighting dynamos a pulley on the said y belt, a second pulle driven by the said It, a spring influence hanger pivotally mounted and en porting the said second pulley and ada. te to swing in the direction of the saidbe t and to adjust thereby the belt tension, a air of spur gear wheels, the one being d i'iven by the said second pulley and the other driving an universal joint shaft arranged rectangularly to the said belt and a dynamo driven by this shaft the said universal joint shaft being arranged along and inside the transverse beam of the truck frame of the car, the said ported on the said beam. In testimony t at I claim the foregoing as my invention, I have signed my name hereto.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2881567 *||Oct 18, 1955||Apr 14, 1959||Carl F Whitaker||Finishing machine|
|US3576142 *||May 15, 1969||Apr 27, 1971||John Matthews||Housing for motion transmission mechanism|
|US3837291 *||Jun 21, 1972||Sep 24, 1974||Dresser Ind||Crane bridge belt drive|
|US5345878 *||Aug 17, 1992||Sep 13, 1994||Charles Jacob||Apparatus and method for moving railway cars|
|US9132841 *||Mar 1, 2013||Sep 15, 2015||Johnson Hydramotive, LLC||Apparatus for moving railcars via self-propulsion|
|US20130239846 *||Mar 1, 2013||Sep 19, 2013||Johnson Hydramotive, LLC||Apparatus for Moving Railcars via Self-Propulsion|
|DE3204666A1 *||Feb 11, 1982||Oct 13, 1983||Kork & Homrich Gmbh||Drive assembly which can be positioned on the wheel axle of a vehicle, preferably of a rail vehicle|
|U.S. Classification||105/105, 105/96.1, 105/110, 474/117, 105/117|
|Cooperative Classification||Y02T30/36, B61D43/00|