US3333550A - Rail apparatus - Google Patents

Rail apparatus Download PDF

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Publication number
US3333550A
US3333550A US458313A US45831365A US3333550A US 3333550 A US3333550 A US 3333550A US 458313 A US458313 A US 458313A US 45831365 A US45831365 A US 45831365A US 3333550 A US3333550 A US 3333550A
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Prior art keywords
locomotor
rail
wheels
downwardly
rails
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US458313A
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Harold F Gorham
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GORHAM UNIVERSAL Manufacturing Co I
GORHAM UNIVERSAL MANUFACTURING COMPANY Inc
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GORHAM UNIVERSAL Manufacturing Co I
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C11/00—Locomotives or motor railcars characterised by the type of means applying the tractive effort; Arrangement or disposition of running gear other than normal driving wheel
    • B61C11/06—Locomotives or motor railcars characterised by the type of means applying the tractive effort; Arrangement or disposition of running gear other than normal driving wheel tractive effort applied or supplied by aerodynamic force or fluid reaction, e.g. air-screws and jet or rocket propulsion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60F—VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES
    • B60F1/00—Vehicles for use both on rail and on road; Conversions therefor
    • B60F1/02—Vehicles for use both on rail and on road; Conversions therefor with rail and road wheels on the same axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60V—AIR-CUSHION VEHICLES
    • B60V3/00—Land vehicles, waterborne vessels, or aircraft, adapted or modified to travel on air cushions
    • B60V3/02—Land vehicles, e.g. road vehicles
    • B60V3/04—Land vehicles, e.g. road vehicles co-operating with rails or other guiding means, e.g. with air cushion between rail and vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B61B12/12—Cable grippers; Haulage clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B13/00—Other railway systems
    • B61B13/08—Sliding or levitation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B5/00—Elevated railway systems without suspended vehicles
    • B61B5/02—Elevated railway systems without suspended vehicles with two or more rails

Definitions

  • the present invention relates to locomotors which are guided by a rail of rails.
  • Rail means having an upwardly facing surface and having two downwardly facing surfaces, which surfaces are utilized, in c-onjunction with means on a locomotor, are provided for guiding the locomotor and for limiting the upward or tilting movements of the locomotor.
  • the rail means comprises three rails, namely a centrally disposed rail having an upwardly facing surface forming a track, and two parallelly disposed rails, on opposite sides of the central rail, each having a downwardly facing surface and each forming a track.
  • the locomotor is provided with a wheel having spaced peripheral flanges. This wheel is disposed above the central track and the flanges thereon are utilized for guiding the locomotor.
  • the locomotor is 'pro"' vided also with two flanged wheels disposed below the other two tracks which are utilized to limit the extent of upward or tilting movements of the locomotor.
  • the rail means includes two rails having upwardly facing surfaces which cooperate with the flanges on two locomotor wheels for guiding the locomotor, and the same rails are also provided with downwardly facing surfaces which cooperate with two additional wheels on the locomotor for limiting upward movement of the locomotor.
  • the present invention also contemplates the inclusion of auxiliary wheels on the locomotor which wheels can be lowered for rolling the locomotor along rails or along trackless surfaces.
  • FIG. 1 is a side view of the locomotor, part thereof being broken away to show operating mechanism therein, the view also showing the locomotor on the rail means;
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. 1;
  • FIG. 3 is a fragmentary sectional view taken along line 3-3 of FIG. 1, but on a larger scale;
  • FIG. 4 is a side view of another embodiment of the invention showing the locomotor designed to operate on a standard width railroad track or rails;
  • FIG. 5 is a sectional View taken along line 5 5 of FIG. 4.
  • the track means 20 is shown in cross-section in FIG. 3.
  • the track means 20 is supported by a plurality of posts 22 disposed along the route. They are formed of any suitable material such as steel or re-enforced and prestressed concrete.
  • the track means includes a runner 24 which may be formed of prestressed, re-enforced concrete and is provided with two ice upwardly facing surfaces 26 and 28.
  • the top 30 of this runner 24 carries a rail 32 formed of steel and having an upwardly facing surface 34.
  • the underside of the runner 24 carries two rails 36 and 38 which are provided with downwardly facing surfaces 40 and 42, respectively.
  • the rails 36 and 38 are arranged parallelly of the rail 32 and are spaced an equal distance laterally of the rail 32.
  • the surfaces 26 and 23 extend downwardly whereby material falling thereon will slide off readily. These surfaces 26 and 28 are herein defined as air irnpinged surfaces.
  • the locomotor 44 includes a housing 46 which carries propulsion mechanism such as jet engines, disposed on opposite sides of the housing 46, one of which is shown at 48.
  • the housing is provided with a lloor 50 which carries a plurality of upwardly extending brackets forming bearing supports for a front wheel 54 and a rear wheel 56.
  • These wheels are provided with spaced peripherally extending flanges 5S. The wheels are disposed above the rail 32 and when lowered, the flanges 58 form guides for the locomotor.
  • the locomotor -rides on an air cushion. This is accomplished by impinging air upon the angling surfaces 26 and 28 on the runner 24 through air nozzles 60 and 62. The air is supplied to the nozzles 62 through tube 64 and branch tubes 66 and 68. The air is compressed and forced through the tubes by a compressor 70 which receives air through a tube 72, the open end vof which is at 74 at the forward part of the housing 46. K
  • the housing 46 is also provided withA a sub lloor 76:
  • the underside of the sub floor 76 carries two cylinders 78 of the pneumatic hydraulic type, in which pistons (not shown) a're ⁇ adapted to reciprocate.
  • Thesepistons carry arms 80 which in turn form axles for wheels 82, each having a plurality of spaced flanges 84.
  • These flanges are adapted to engage the rails 36 and 38 to assist in guiding the locomotor.
  • the wheels 82 also stabilize the locomotor when it is stationary or is moving at a very slow speed.
  • the wheels are adapted to engage the underside of the surfaces 40 and 42 of the rails 36 and 38, respectively, for this purpose. When the wheels 82 are not needed, they can be lowered by forcing air or liquid through the pipes 86.
  • the underside of the sub floor 76 also carries brackets S8 which form axles for wheels 90. These wheels are spaced so as to ride on standard gauge rails shown in phantom at 92 in FIG. 2. In this manner the locomotor can also be conveyed over standard gauge railroad tracks.
  • the housing 46 is provided with a series of brackets 94 disposed on opposite sides of the runner 24 and these brackets through pivots 96 carry arms 98, the lower end of which carries wheels 100, preferably the type that carries rubber tires.
  • These wheels 100 can be raised and lowered by pneumatic or hydraulic equipment including the ram 102 and the cylinder 104.
  • the ram is connected with the axle for the wheels and the cylinders are pivoted at 106 to brackets 108.
  • the locomotor can be moved over a trackless path such as a road.
  • Any suitable steering mechanism may be provided for turning the wheels 100 so that they can be driven as an automobile truck.
  • the locomotor is shown at 144 and the rail means which is shown at is supported by a plurality of posts 122.
  • Two rails 132 are provided and each is formed in superimposed sections 135, 137 and 139 welded to one another, the center section 137 is supported by the post 122 through a plurality of transversely disposed I-beams 141.
  • Each of these composite rails 132 is provided with an upwardly facing surface 134 and a downwardly facing surface 140.
  • the composite rails 132 are spaced at standard gauge distances from one another.
  • the sides 145 of the locomotor carry inwardly extending brackets 147 which brackets carry bearings 149 on an axis arranged transversely of the rails 132 for supporting Wheels 154 which are adapted to ride on the upwardly facing surfaces 134 of the rails 132.
  • Each of these wheels is provided with peripherally extending flanges 156 which are arranged to engage the inner and outer sides of a rail 132 for guiding the locomotor.
  • Each of the brackets 147 carries a cylinder 178 of the pneumatic or hydraulic type.
  • Each cylinder receives a piston (not shown) which is connected with a ram 179 which merges into axles 181 for a steel wheel 182 and a pneumatic wheel 100.
  • VThe cylinders 178 are connected to a source offluid or air pressure through pipes 186 whereby when wheel 182 is riding on the standard gauge tracks 92 or riding upon a road, the locomotor can be raised above the rails 132. Suitable steering mechanism would be provided for the wheels 100 whereby the locomotor can be drivenand guided manually on a trackless road.
  • the locomotor -144 When the locomotor -144 is riding on standard rails, such as 92, the peripheral anges 184 of the wheel 182 function as guides.
  • Rail means forming upwardly facing surfaces yand a downwardly facing surface, said upwardly facing Y surfaces including a centrally disposed rail and surfaces angling outwardly and downwardly from opposite sides of the rail;

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Heat Treatment Of Articles (AREA)

Description

H. F. GORHAM BAIL APPARATUS Aug. 1, 1967 2 Sheets-Sheet l Filed May 24, 1965 RM mA w MM M 0 m| @fl M6 y fr. l .ev 5 1 t 5ft? 0 s 1 wt Y P m w M n Y p/A NM l .m B m, E. W n w NN M N m Nw H. F. GORHAM Aug. l, 1967 RAIL APPARATUS 2 Sheets-Shee't Filed May 24, 1955 Y INVENTOR. HA FD D E' @GEH/M7 ATTOZ/YEYS United States Patent O 3,333,550 RAIL APPARATUS Harold F. Gorham, National City, Calif., assig'nor to Gorham Universal Manufacturing Company, Inc., National City, Calif., a corporation of California Filed May 24, 1965, Ser. No. 458,313 2 Claims. (Cl. 104-23) ABSTRACT F THE DISCLOSURE Transportation system employing a locomotor riding on a single rail or riding on air delivered by nozzles to surfaces which extend outwardly and downwardly from opposite sides of the rail.
The present invention relates to locomotors which are guided by a rail of rails.
Rail means, having an upwardly facing surface and having two downwardly facing surfaces, which surfaces are utilized, in c-onjunction with means on a locomotor, are provided for guiding the locomotor and for limiting the upward or tilting movements of the locomotor.
In one embodiment of the present invention, the rail means comprises three rails, namely a centrally disposed rail having an upwardly facing surface forming a track, and two parallelly disposed rails, on opposite sides of the central rail, each having a downwardly facing surface and each forming a track. The locomotor is provided with a wheel having spaced peripheral flanges. This wheel is disposed above the central track and the flanges thereon are utilized for guiding the locomotor. The locomotor is 'pro"' vided also with two flanged wheels disposed below the other two tracks which are utilized to limit the extent of upward or tilting movements of the locomotor.
In another embodiment of the invention, the rail means includes two rails having upwardly facing surfaces which cooperate with the flanges on two locomotor wheels for guiding the locomotor, and the same rails are also provided with downwardly facing surfaces which cooperate with two additional wheels on the locomotor for limiting upward movement of the locomotor.
The present invention also contemplates the inclusion of auxiliary wheels on the locomotor which wheels can be lowered for rolling the locomotor along rails or along trackless surfaces.
Other features and the advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein preferred embodiments of the invention are illustrated.
In the drawings:
FIG. 1 is a side view of the locomotor, part thereof being broken away to show operating mechanism therein, the view also showing the locomotor on the rail means;
FIG. 2 is a sectional view taken along line 2-2 of FIG. 1;
FIG. 3 is a fragmentary sectional view taken along line 3-3 of FIG. 1, but on a larger scale;
FIG. 4 is a side view of another embodiment of the invention showing the locomotor designed to operate on a standard width railroad track or rails; and
FIG. 5 is a sectional View taken along line 5 5 of FIG. 4.
Referring more in detail to the drawings,- and more particularly to FIGS. l, 2 and 3, there the track means 20 is shown in cross-section in FIG. 3. The track means 20 is supported by a plurality of posts 22 disposed along the route. They are formed of any suitable material such as steel or re-enforced and prestressed concrete. The track means includes a runner 24 which may be formed of prestressed, re-enforced concrete and is provided with two ice upwardly facing surfaces 26 and 28. The top 30 of this runner 24 carries a rail 32 formed of steel and having an upwardly facing surface 34. The underside of the runner 24 carries two rails 36 and 38 which are provided with downwardly facing surfaces 40 and 42, respectively. The rails 36 and 38 are arranged parallelly of the rail 32 and are spaced an equal distance laterally of the rail 32. The surfaces 26 and 23 extend downwardly whereby material falling thereon will slide off readily. These surfaces 26 and 28 are herein defined as air irnpinged surfaces.
The locomotor 44 includes a housing 46 which carries propulsion mechanism such as jet engines, disposed on opposite sides of the housing 46, one of which is shown at 48. The housing is provided with a lloor 50 which carries a plurality of upwardly extending brackets forming bearing supports for a front wheel 54 and a rear wheel 56. These wheels are provided with spaced peripherally extending flanges 5S. The wheels are disposed above the rail 32 and when lowered, the flanges 58 form guides for the locomotor.
- The locomotor -rides on an air cushion. This is accomplished by impinging air upon the angling surfaces 26 and 28 on the runner 24 through air nozzles 60 and 62. The air is supplied to the nozzles 62 through tube 64 and branch tubes 66 and 68. The air is compressed and forced through the tubes by a compressor 70 which receives air through a tube 72, the open end vof which is at 74 at the forward part of the housing 46. K
The housing 46 is also provided withA a sub lloor 76: The underside of the sub floor 76 carries two cylinders 78 of the pneumatic hydraulic type, in which pistons (not shown) a're`adapted to reciprocate. Thesepistons carry arms 80 which in turn form axles for wheels 82, each having a plurality of spaced flanges 84. These flanges are adapted to engage the rails 36 and 38 to assist in guiding the locomotor. The wheels 82 also stabilize the locomotor when it is stationary or is moving at a very slow speed. Thus the wheels are adapted to engage the underside of the surfaces 40 and 42 of the rails 36 and 38, respectively, for this purpose. When the wheels 82 are not needed, they can be lowered by forcing air or liquid through the pipes 86.
The underside of the sub floor 76 also carries brackets S8 which form axles for wheels 90. These wheels are spaced so as to ride on standard gauge rails shown in phantom at 92 in FIG. 2. In this manner the locomotor can also be conveyed over standard gauge railroad tracks.
The housing 46 is provided with a series of brackets 94 disposed on opposite sides of the runner 24 and these brackets through pivots 96 carry arms 98, the lower end of which carries wheels 100, preferably the type that carries rubber tires. These wheels 100 can be raised and lowered by pneumatic or hydraulic equipment including the ram 102 and the cylinder 104. The ram is connected with the axle for the wheels and the cylinders are pivoted at 106 to brackets 108. When the wheels are lowered, the locomotor can be moved over a trackless path such as a road. Any suitable steering mechanism may be provided for turning the wheels 100 so that they can be driven as an automobile truck.
Referring now to the embodiment shown in FIGS. 4 and 5, the locomotor is shown at 144 and the rail means which is shown at is supported by a plurality of posts 122. Two rails 132 are provided and each is formed in superimposed sections 135, 137 and 139 welded to one another, the center section 137 is supported by the post 122 through a plurality of transversely disposed I-beams 141. Each of these composite rails 132 is provided with an upwardly facing surface 134 and a downwardly facing surface 140. Like the rails 92, the composite rails 132 are spaced at standard gauge distances from one another.
The sides 145 of the locomotor carry inwardly extending brackets 147 which brackets carry bearings 149 on an axis arranged transversely of the rails 132 for supporting Wheels 154 which are adapted to ride on the upwardly facing surfaces 134 of the rails 132. Each of these wheels is provided with peripherally extending flanges 156 which are arranged to engage the inner and outer sides of a rail 132 for guiding the locomotor.
Each of the brackets 147 carries a cylinder 178 of the pneumatic or hydraulic type. Each cylinder receives a piston (not shown) which is connected with a ram 179 which merges into axles 181 for a steel wheel 182 and a pneumatic wheel 100. VThe cylinders 178 are connected to a source offluid or air pressure through pipes 186 whereby when wheel 182 is riding on the standard gauge tracks 92 or riding upon a road, the locomotor can be raised above the rails 132. Suitable steering mechanism would be provided for the wheels 100 whereby the locomotor can be drivenand guided manually on a trackless road. When the locomotor -144 is riding on standard rails, such as 92, the peripheral anges 184 of the wheel 182 function as guides.
From the foregoing, it will be seen that by limiting upward movement of the locomotorrby wheels 82, in FIGS. 1 and 2, and the wheel 182, in FIGS. 4 and 5, I have assured preventing of thelocomotors from leaving the track although the locomotor is operating at a very high speed. Also, the wheels 82, in the embodiment shown in FIGS. l and 2, prevent tilting of the locomotor 44 while it is stationary or is moving at a slowed speed.
While the forms of embodiment herein shown and described, constitute preferred forms, it is to be understood that other forms may be adopted falling within the scope of the claims that follow.
I claim:
1. In combination:
(A) Rail means forming upwardly facing surfaces yand a downwardly facing surface, said upwardly facing Y surfaces including a centrally disposed rail and surfaces angling outwardly and downwardly from opposite sides of the rail;
(B) a locomotor having:
(l) wheels above the upwardly facing surface of the rail for supporting the locomotor,
(2) means below the downwardly facing surface for limiting upward movement of the locomotor;
(C) a plurality of nozzles carried by the locomotor and directed to simultaneously direct air onto both the outwardly and downwardly anglingsurfaces of the rail means for raising the wheels above the rail;
(D) and'an air compressor carried by the locomotor for supplying air to the nozzles.
2. A combination as Vdefined in claim 1, characterized in that the rail means includes :v
(E) a second downwardly facingsurface; one ofsaid downwardly facing surfaces being disposed below one of the outwardly and downwardly angling surfaces, and the other of said downwardly 4facing surfaces being disposed below the other of the outwardly and .downwardly angling surfaces. 1
Y References Cited UNITED STATES PATENTS l Beecher 1(7)4-120 ARTHUR L. LA POINT, Primary Examiner.
R. M. WOHLFARTH, Assistant Examiner.

Claims (1)

1. IN COMBINATION: (A) RAIL MEANS FORMING UPWARDLY FACING SURFACES AND A DOWNWARDLY FACING SURFACE, SAID UPWARDLY FACING SURFACES INCLUDING A CENTRALLY DISPOSED RAIL AND SURFACES ANGLING OUTWARDLY AND DOWNWARDLY FROM OPPOSITE SIDES OF THE RAIL; (B) A LOCOMOTOR HAVING: (1) WHEELS ABOVE THE UPWARDLY FACING SURFACE OF THE RAIL FOR SUPPORTING THE LOCOMOTOR, (2) MEAND BELOW THE DOWNWARDLY FACING SURFACE FOR LIMITING UPWARD MOVEMENT OF THE LOCOMOTOR; (C) A PLURALITY OF NOZZLES CARRIED BY THE LOCOMOTOR AND DIRECTED TO SIMULTANEOUSLY DIRECT AIR ONTO BOTH THE OUTWARDLY AND DOWNWARDLY ANGLING SURFACES OF THE RAIL MEANS FOR RAISING THE WHEELS ABOVE THE RAIL; (D) AND AN AIR COMPRESSOR CARRIED BY THE LOCOMOTOR FOR SUPPLYING AIR TO THE NOZZLES.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575454A (en) * 1969-04-01 1971-04-20 Martha C Meeker Bumper shock-absorbing vehicle
US3652038A (en) * 1969-11-03 1972-03-28 John Van Veldhuizen Airplane with air cushion landing gear
US3815513A (en) * 1972-10-06 1974-06-11 Westinghouse Air Brake Co Vehicle retaining arrangement for a monobeam type of transportation system
US3828680A (en) * 1972-06-08 1974-08-13 P Farren Storage system
US3875856A (en) * 1970-10-30 1975-04-08 Martha C Meeker High speed transportation means for small vehicles
US20050011399A1 (en) * 2003-05-12 2005-01-20 Skoblenick Harry R. Automated people mover (APM) monorail system
ITUB20160075A1 (en) * 2016-01-26 2017-07-26 Giuseppe Rosario Pinnavaia TRAIN A LEVITATION
US11130504B2 (en) * 2018-11-23 2021-09-28 Aerom Representações E Participações Ltda. Pneumatic propulsion system for high capacity transport of passengers and/or cargo
US20230031854A1 (en) * 2020-01-02 2023-02-02 Crrc Qingdao Sifang Co., Ltd. Railway vehicle with aerodynamic lift control device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US695137A (en) * 1900-07-25 1902-03-11 American Construction Company Monorailway.
US1748514A (en) * 1925-12-03 1930-02-25 Kucharzik Adolf Relatively stationary body with a single punctiform or approximately punctiform support or a plurality of such supports in one row
US3055312A (en) * 1958-10-03 1962-09-25 Ford Motor Co High speed transportation vehicle
US3168875A (en) * 1963-04-18 1965-02-09 Charles F Reed Jet suspension
US3190235A (en) * 1962-06-26 1965-06-22 Bertin & Cie Vehicles associated to a guiding track
US3233559A (en) * 1964-10-27 1966-02-08 Lor Corp Transportation means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US695137A (en) * 1900-07-25 1902-03-11 American Construction Company Monorailway.
US1748514A (en) * 1925-12-03 1930-02-25 Kucharzik Adolf Relatively stationary body with a single punctiform or approximately punctiform support or a plurality of such supports in one row
US3055312A (en) * 1958-10-03 1962-09-25 Ford Motor Co High speed transportation vehicle
US3190235A (en) * 1962-06-26 1965-06-22 Bertin & Cie Vehicles associated to a guiding track
US3168875A (en) * 1963-04-18 1965-02-09 Charles F Reed Jet suspension
US3233559A (en) * 1964-10-27 1966-02-08 Lor Corp Transportation means

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575454A (en) * 1969-04-01 1971-04-20 Martha C Meeker Bumper shock-absorbing vehicle
US3652038A (en) * 1969-11-03 1972-03-28 John Van Veldhuizen Airplane with air cushion landing gear
US3875856A (en) * 1970-10-30 1975-04-08 Martha C Meeker High speed transportation means for small vehicles
US3828680A (en) * 1972-06-08 1974-08-13 P Farren Storage system
US3815513A (en) * 1972-10-06 1974-06-11 Westinghouse Air Brake Co Vehicle retaining arrangement for a monobeam type of transportation system
US20050011399A1 (en) * 2003-05-12 2005-01-20 Skoblenick Harry R. Automated people mover (APM) monorail system
ITUB20160075A1 (en) * 2016-01-26 2017-07-26 Giuseppe Rosario Pinnavaia TRAIN A LEVITATION
US11130504B2 (en) * 2018-11-23 2021-09-28 Aerom Representações E Participações Ltda. Pneumatic propulsion system for high capacity transport of passengers and/or cargo
US20230031854A1 (en) * 2020-01-02 2023-02-02 Crrc Qingdao Sifang Co., Ltd. Railway vehicle with aerodynamic lift control device
US11718182B2 (en) * 2020-01-02 2023-08-08 Crrc Qingdao Sifang Co., Ltd. Railway vehicle with aerodynamic lift control device

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