US3826507A - Pneumatic spring for railroad cars - Google Patents

Pneumatic spring for railroad cars Download PDF

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Publication number
US3826507A
US3826507A US00206632A US20663271A US3826507A US 3826507 A US3826507 A US 3826507A US 00206632 A US00206632 A US 00206632A US 20663271 A US20663271 A US 20663271A US 3826507 A US3826507 A US 3826507A
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US
United States
Prior art keywords
cap
bead
combination
frame
plenum chamber
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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US00206632A
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English (en)
Inventor
W Brand
H Haarkotter
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Duewag AG
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Waggonfabrik Uerdingen AG
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Assigned to DUEWAG AKTIENGESELLSCHAFT reassignment DUEWAG AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WAGGONFABRIK UERDINGEN AG
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/10—Bolster supports or mountings incorporating fluid springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
    • B60G11/28—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/48—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds not including leaf springs
    • B60G11/62—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds not including leaf springs having both rubber springs and fluid springs
    • 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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/14—Side 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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/14—Side bearings
    • B61F5/144—Side bearings comprising fluid damping devices

Definitions

  • a pneumatic spring for use between the lateral frame members of the frame and bogie in a railroad car or a streetcar has a torus-shaped diaphragm having two coplanar ring-shaped beads theouter of which is sealingly secured to the frame and the inner of which is sealingly secured to a cap which is coupled to the b0- gie, preferably by way of a rubber spring.
  • the coupling between the cap and the frame member of the bogie may comprise an antifriction bearing or a friction bearing to reduce the stressing and wear on the diaphragm.
  • the interior of the diaphragm communicates with a plenum chamber in the frame member of the frame and the cap is provided with a projection which abuts against a partition in the frame forming the compartments of the plenum chambers in the event of a failure of the pneumatic spring.
  • the present invention relates to improvements in pneumatic springs for use in railroad cars, streetcars or the like rail-mounted vehicles. More particularly, the invention relates to improvements in pneumatic springs which can be used between the wheel-mounted beamfree or cradle-free truck or bogie and the body and frame of a railroad car, streetcar, tramway or the like.
  • German printed publication No. 1,207,420 discloses a railroad car with two pneumatic springs interposed between the lateral frame members of the cradle-free bogie and the lateral frame members of the frame or body of the vehicle.
  • Each spring comprises a torusshaped diaphragm which resembles a ring-shaped trough having an open side facing the underside of the frame and bounded by two beads including an outer bead which is secured to the frame and an inner bead which is coupled to the truck.
  • the two beads are normally located in two different horizontal planes, namely, the inner head is disposed at a level below the outer bead.
  • German Utility Model No. 7,018,231 discloses a modified pneumatic spring employing a diaphragm similar to that of the German printed publication No. 1,207,420 wherein the lower or inner bead of the diaphragm is secured to a rim provided on a tube which is mounted on the bogie. An anti-friction bearing is installed between the rim and the upper end of the tube. The rim has a cupped extension which is received in the tube and accommodates the component parts of an auxiliary or emergency stop which becomes operative in the event of failure of the pneumatic spring.
  • the just described construction comprises a very large number of parts which contribute to the high initial cost of the pneumatic spring.
  • An additional object of the invention is to provide novel and improved connections between the beads of the diaphragm and the frame and bogie of a streetcar or the like.
  • the invention is embodied in a vehicle, such as a railroad car or a streetcar, which comprises a wheelmounted bogie or truck, a vehicle frame located above the bogie, and cushioning means including at least one pneumatic spring which is interposed between the frame and the bogie and comprises a torus-shaped hollow flexible diaphragm having an inner ring-shaped bead and an outer ring-shaped bead spacedly surround ing the inner bead and being normally at least substantially coplanar with the inner bead, connecting means sealingly securing the outer head to the frame, a cap surrounded by and sealingly secured to the inner bead and having an arresting portion normally spaced from and located at the level below the adjacent portion of the frame, and coupling means securing the cap to the bogie.
  • the frame has a plenum chamber in communication with the interior of the diaphragm, and the diaphragm has an open upper side extending between the two beads and facing the frame.
  • FIG. 1 is a fragmentary vertical sectional view of a rail-mounted vehicle embodying a pneumatic spring which is constructed in accordance with a first embodiment of the invention and is shown in central vertical section;
  • FIG. 2 is a similar view of a portion of a vehicle embodying a modified pneumatic spring
  • FIG. 3 is a similar view of a vehicle embodying a third pneumatic spring.
  • FIG. 4 is a similar view of a vehicle embodying a fourth pneumatic spring and FIG. 5 is a fragmentary side view of a railway vehicle having a wheel mounted track, a frame, and a pneumatic spring interposed between track and frame.
  • FIG. 5 partly illustrates a railway vehicle RV having wheel mounted trucks or bogies B, only one of which is shown, and a pneumatic spring 1, 8, which will be described later on in detail, between the truck B and the frame F of the vehicle.
  • FIG. 1 there is shown a pneumatic spring which can be installed between a lateral frame member 4 of the body or frame F forming part of a railroad car or streetcar RV and a lateral frame member 11 of the bogie or truck B which is mounted on wheels, running along a pair of rails.
  • the locations in which two pneumatic springs of the type shown in FIG. 1 can be mounted between the bogie B and the vehicle frame F are shown in FIGS. 1 and 2 of the aforediscussed German printed publication No. 1,207,420.
  • the pneumatic spring of FIG. 1 comprises a torusshaped hollow flexible diaphragm 1 having an outer ring-shaped head 2 and an inner ring-shaped bead 3 which latter issurrounded by and is normally coplanar withthe outer bead 2.
  • the connecting device which sealingly secures the outer bead 2 to the frame member 4 comprises a clamping ring 5 and screws, bolts or analogous fasteners 5a.
  • the inner bead 3 surrounds and is sealingly secured to a cap 6 which has a downwardly extending cylindrical portion 7 adjacent to the external surface of the diaphragm 1 immediately below the bead 3.
  • the connection between the bead 3 and cap 6 is of the type similar to that between a tubeless tire and a rim on the wheel of an automotive vehicle.
  • the cylindrical portion 7 of .the cap 6 serves as means for properly centering the diaphragm 1 and for preventing inward bulging of the diaphragm in the region below the bead 3.
  • the upper side of the cap 6 is provided with a rib, rail or analogous arresting portion or projection 12 which serves'as an auxiliary or emergency stop in the event of failure of the pneumatic spring and then abuts against an internal portion or portions 13 of the frame 4. .Thus, if the diaphragm 1 is destroyed or punctured, the projection l2 abuts against the underside of the portion 13 and thereby prevents further descent of the respective side of the frame F toward the bogie B.
  • the partitions 13 is provided with one'or more openings or ports 13a for the flow of a pressurized gaseous fluid which fills the interior of the diaphragm l and a plenum chamber 15 of the frame F. Since the upper side of the diaphragm 1 between the beads 2 and 3 is open, the interior of the diaphragm is free'to communicate with all compartments of the plenum chamber 15, namely, with; the compartments above and below the partition 13. 1
  • The'coupling meansbetween the frame member 11 of thebogieB and the cap 6 comprises a laminated elastomeric spring 8 consisting at least essentially of natural or'synthetic rubber, a lower flange 8A which connects the lower end of the spring 8 to the frame member 11 by means of threaded fasteners 88, and an upper flange 8D which connects the upper end of the spring 8 tothe-cap 6 by means of threaded fasteners 815.
  • the respective ends of the rubber spring 8 are rigidly. connected with the cap 6 and with the frame member 1 1.
  • the cap 9 constitutes theupper race of an antifriction bearing 25 which forms part of thecoupling means between the inner bead 3 of the diaphragm 1 and the frame member 11.
  • the lower race of the bearing 25 is secured to the flange 8D by the fasteners 8E.
  • Rolling elements 9a are interposed between the races 9 and 10.
  • the pneumatic spring of FIG. 2 is identical with thepneumatic spring of FIG. 1, i.e., the heads 2, 3 are normally located in a common horizontal plane and the two compartmentsof the plenum chamberlS-are-free to communicate witheach other and with the interior of the diaphragm l.
  • the coupling means between the cap 6 and the frame member 11 of the bogie B comprises an antifriction bearing 26 having an upper race 27'which is rigid with the flange 8A, a lower race 14 which is bolted to theframe member 11, and rolling elements 28 interposed between the races 14, 27.
  • the pneumatic spring of FIG. 3 is identical with. the pneumatic spring of FIG. 1.
  • the cap 16 constitutes the/outer sleeve of a friction bearing 29 which forms part of the coupling means between the bead 3 and the frame member 11.
  • the inner sleeve 17 of the friction bearing 29 is bolted to the flange 8D.
  • the purpose of the rubber springs 8 is to take up mainly vertical stresses.
  • the manner in which the frame F is turnably connected with the bogie B is not shown in the drawing; such connection may comprise an antifriction ball bearing mounted on the frame F and having a lower race cooperating with arms'or leversprovided on the bogie B.
  • FIGS. 2-4 An important advantage of the constructions shown in FIGS. 2-4 is that the bearings in the coupling means between the inner bead 3 and the frame member 11 of the bogie B reduce the likelihood of subjectingthe diaphragm l to excessive torsional stresses. This .prolongs the useful life of the diaphragm.
  • the rubber spring 8 reduces the likelihood of excessive stressing of the diphragm 1 when the vehicle travels along a sharp curve and the distance between the lateral frame members 4 and 11 changes.
  • Another advantage of the improved pneumatic spring is that it comprises a relatively small number of simple parts which can be readily assembled or taken apart.
  • the useful life of the diaphragm considerably exceeds the useful life of diaphragms in conventional pneumatic springs. Also, the wear on the wheels of the bogie B is less pronounced and the running of wheels on the rails ismore satisfactory than in rail-mounted conveyances employing conventional pneumatic springs.
  • a pneumatic spring arrangement comprising, in combination, plenum chamber means having an opening; pneumatic spring means including a torus-shaped hollow flexible diaphragm having an inner ring shaped bead and an outer ring shaped bead spacedly surrounding said inner ring shaped bead; connecting means sealingly securing said outer ring shaped head to said plenum chamber means around said opening thereof; a cap surrounded by and sealinglysecured to said inner ring shaped .bead, said cap having a rigid projecting portion projecting toward a portion of said plenum chamber means located above said projecting portion,
  • said coupling means includes an antifriction bearing having an upper race constituting said cap, a lower race and rolling elements disposed between said races.
  • said coupling means comprises a friction bearing having two coaxial sleeve-like portions one of which constitutes said cap and the other of which is rotatable relative to said one sleeve-like portion.
  • said cap comprises a cylindrical portion whose axis is substantially normal to the common plane of said beads and said diaphragm further comprises a substantially cylindrical portion immediately adjacent to said inner bead and surrounding said cylindrical portion of said cap in engagement therewith.
  • said plenum chamber comprises a rigid partition extending transversely therethrough and substantially parallel to said inner bead, said partition dividing said chamber into two compartments, at least one port in said partition providing communication between said compartments, a portion of said partition forming said portion of said frame.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Diaphragms And Bellows (AREA)
  • Vehicle Body Suspensions (AREA)
US00206632A 1970-12-11 1971-12-10 Pneumatic spring for railroad cars Expired - Lifetime US3826507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2060960A DE2060960C3 (de) 1970-12-11 1970-12-11 Luftfederung für Schienenfahrzeuge mit wiegenlosem Drehgestell

Publications (1)

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US3826507A true US3826507A (en) 1974-07-30

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US00206632A Expired - Lifetime US3826507A (en) 1970-12-11 1971-12-10 Pneumatic spring for railroad cars

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DE (1) DE2060960C3 (it)
FR (1) FR2117872B1 (it)
IT (1) IT945346B (it)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904181A (en) * 1974-02-28 1975-09-09 S I G Schwiezerische Ind Ges Fluid type accumulator spring with emergency back-up spring
US3906865A (en) * 1972-06-09 1975-09-23 Mcneil Corp Material handling apparatus
JPS531765A (en) * 1976-06-26 1978-01-10 Sumitomo Metal Ind Ltd Rolling stock pneumatic spring
US4690388A (en) * 1984-03-29 1987-09-01 Dunlop Limited Pneumatic vehicle suspension with failsafe internal stop
US4697526A (en) * 1984-05-30 1987-10-06 Officina Meccanica Della Stanga O.M.S. S.P.A. Articulation system for articulated depressed-floor tramway carriages
US5348266A (en) * 1992-03-27 1994-09-20 Kinetic Systems, Inc. Reduced horizontal stiffness vibration isolation system
US5549269A (en) * 1992-03-27 1996-08-27 Gertel; Maurice Gas spring assembly
US5588640A (en) * 1994-10-26 1996-12-31 Mercedes-Benz Ag Air-spring leg with a pressure chamber for motor vehicles
US20040119213A1 (en) * 2002-09-10 2004-06-24 Seagate Technology Llc Fluid isolator assembly and floating elastomeric damping element
WO2005005220A1 (de) * 2003-07-15 2005-01-20 Siemens Transportation Systems Gmbh & Co Kg Zentrierende notfederabstützung
US20060170140A1 (en) * 2003-06-04 2006-08-03 Thorsten Menk Spring device, especially for the rail vehicle sector
US20080036125A1 (en) * 2001-02-14 2008-02-14 Ludger Burstedde Central Fastening Element for an Axially Symmetric Gas Spring
US20080121134A1 (en) * 2006-11-27 2008-05-29 Kadee Quality Products, Inc. Model railroad truck having polymer spring
EP2180204A2 (de) 2008-10-24 2010-04-28 ContiTech Luftfedersysteme GmbH Zusatzfeder mit Gleitfläche
CN101643073B (zh) * 2009-09-11 2011-01-19 南车株洲电力机车有限公司 地铁车辆用一系常接触弹性止挡
DE102009044031A1 (de) 2009-09-17 2011-03-24 Contitech Luftfedersysteme Gmbh Federelement für ein Fahrwerk
US20110233832A1 (en) * 2009-07-07 2011-09-29 Sumitomo Electric Industries, Ltd. Air spring for vehicle and railway truck for vehicle
CN102401072A (zh) * 2011-06-21 2012-04-04 贺劼 一种静刚度充液调节动刚度随位移调节的空气弹簧
CN102401071A (zh) * 2011-06-21 2012-04-04 贺劼 一种静刚度容积调节动刚度随位移调节的空气弹簧
CN102410330A (zh) * 2011-07-24 2012-04-11 杨洁 一种可变容积和隔膜孔调静动刚度加减冲的空气弹簧
DE202012103305U1 (de) 2012-08-30 2012-09-12 Contitech Luftfedersysteme Gmbh Luftfedersystem für ein Schienenfahrzeug
DE102011055399A1 (de) 2011-11-16 2013-05-16 Contitech Luftfedersysteme Gmbh Federsystem für ein Schienenfahrzeug
CN103171580A (zh) * 2013-04-01 2013-06-26 齐齐哈尔轨道交通装备有限责任公司 一种转向架及其旁承
CN103395429A (zh) * 2013-08-09 2013-11-20 株洲时代新材料科技股份有限公司 一种轨道交通用空气弹簧
EP2703246A2 (de) 2012-08-30 2014-03-05 ContiTech Luftfedersysteme GmbH Verfahren zur Herstellung eines Luftfederdeckels
US20140191487A1 (en) * 2013-01-08 2014-07-10 Firestone Industrial Products Company, Llc Lateral support elements, gas spring assemblies and methods
US20140230687A1 (en) * 2013-02-18 2014-08-21 Firestone Industrial Products Company, Llc End member assemblies as well as gas spring assemblies and methods of manufacture including same
US20150175176A1 (en) * 2012-06-18 2015-06-25 Kawasaki Jukogyo Kabushiki Kaisha Railcar bogie
US20160185363A1 (en) * 2013-07-31 2016-06-30 Kawasaki Jukogyo Kabushiki Kaisha Air spring and railcar
CN105889402A (zh) * 2016-06-04 2016-08-24 吴江市三达五金工具厂 一种能够多级调节和自我保护的车用弹簧
JP2017056846A (ja) * 2015-09-17 2017-03-23 公益財団法人鉄道総合技術研究所 制振装置
US20180058534A1 (en) * 2015-05-19 2018-03-01 Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. Nonlinear auxiliary spring, new-belted diaphragm and air spring

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Publication number Priority date Publication date Assignee Title
IT1135697B (it) * 1981-03-23 1986-08-27 Gomma Antivibranti Applic Sospensione secondaria per carrelli senza traversa oscillante di veicoli ferroviari
DE3119469A1 (de) * 1981-05-15 1982-12-09 Duewag AG, 4150 Krefeld Fahrzeugfederung, insbesondere fuer schienen- und lastkraftfahrzeuge
DE3701424A1 (de) * 1987-01-20 1988-07-28 Gutehoffnungshuette Man Luftfederdrehgestell, insbesondere fuer schnellauffaehige schienenfahrzeuge
DE59602664D1 (de) * 1995-12-12 1999-09-09 Phoenix Ag Federvorrichtung
DE102017214491A1 (de) * 2017-08-21 2019-02-21 Contitech Luftfedersysteme Gmbh Luftfedersystem für ein Schienenfahrzeug

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US2848956A (en) * 1955-12-15 1958-08-26 Firestone Tire & Rubber Co Vehicle suspension
US2896551A (en) * 1955-08-29 1959-07-28 Gen Steel Castings Corp Railway truck air spring structure
US2920885A (en) * 1954-12-14 1960-01-12 Continental Gummi Werke Ag Hollow bodies for air cushioning in particular for vehicles
US3008703A (en) * 1959-07-03 1961-11-14 Gen Tire & Rubber Co Vibration isolating air spring
US3012521A (en) * 1959-06-15 1961-12-12 Gen Steel Ind Inc Monorail system
US3045998A (en) * 1958-08-05 1962-07-24 Metalastik Ltd Side bearers for railway vehicles
US3092039A (en) * 1958-07-28 1963-06-04 Gen Steel Ind Inc Suspended railway systems
DE1207420B (de) * 1962-07-25 1965-12-23 Maschf Augsburg Nuernberg Ag Wiegenloses, gasgefedertes Drehgestell fuer Schienenfahrzeuge
US3319952A (en) * 1964-03-11 1967-05-16 Michelin & Cie Pneumatic or air springs
DE7018231U (de) * 1970-05-15 1970-09-03 Wegmann & Co Luftfederung fuer schienenfahrzeuge.
US3601063A (en) * 1969-06-23 1971-08-24 Budd Co Compound railway spring assembly

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DE1081037B (de) * 1955-10-11 1960-05-05 Continental Gummi Werke Ag Luftfeder fuer Fahrzeuge
BE552059A (it) * 1955-10-24
FR1362931A (fr) * 1963-07-11 1964-06-05 Maschf Augsburg Nuernberg Ag Bogie à suspension pneumatique, sans balancier, pour véhicules ferroviaires
DE6606697U (de) * 1967-07-22 1970-11-26 Maschf Augsburg Nuernberg Ag Federung fuer fahrzeuge, insbesondere schienenfahrzeuge

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Publication number Priority date Publication date Assignee Title
US2920885A (en) * 1954-12-14 1960-01-12 Continental Gummi Werke Ag Hollow bodies for air cushioning in particular for vehicles
US2896551A (en) * 1955-08-29 1959-07-28 Gen Steel Castings Corp Railway truck air spring structure
US2848956A (en) * 1955-12-15 1958-08-26 Firestone Tire & Rubber Co Vehicle suspension
US3092039A (en) * 1958-07-28 1963-06-04 Gen Steel Ind Inc Suspended railway systems
US3045998A (en) * 1958-08-05 1962-07-24 Metalastik Ltd Side bearers for railway vehicles
US3012521A (en) * 1959-06-15 1961-12-12 Gen Steel Ind Inc Monorail system
US3008703A (en) * 1959-07-03 1961-11-14 Gen Tire & Rubber Co Vibration isolating air spring
DE1207420B (de) * 1962-07-25 1965-12-23 Maschf Augsburg Nuernberg Ag Wiegenloses, gasgefedertes Drehgestell fuer Schienenfahrzeuge
US3319952A (en) * 1964-03-11 1967-05-16 Michelin & Cie Pneumatic or air springs
US3601063A (en) * 1969-06-23 1971-08-24 Budd Co Compound railway spring assembly
DE7018231U (de) * 1970-05-15 1970-09-03 Wegmann & Co Luftfederung fuer schienenfahrzeuge.

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906865A (en) * 1972-06-09 1975-09-23 Mcneil Corp Material handling apparatus
US3904181A (en) * 1974-02-28 1975-09-09 S I G Schwiezerische Ind Ges Fluid type accumulator spring with emergency back-up spring
JPS531765A (en) * 1976-06-26 1978-01-10 Sumitomo Metal Ind Ltd Rolling stock pneumatic spring
JPS6114376B2 (it) * 1976-06-26 1986-04-18 Sumitomo Kinzoku Kogyo Kk
US4690388A (en) * 1984-03-29 1987-09-01 Dunlop Limited Pneumatic vehicle suspension with failsafe internal stop
US4697526A (en) * 1984-05-30 1987-10-06 Officina Meccanica Della Stanga O.M.S. S.P.A. Articulation system for articulated depressed-floor tramway carriages
US5348266A (en) * 1992-03-27 1994-09-20 Kinetic Systems, Inc. Reduced horizontal stiffness vibration isolation system
US5549269A (en) * 1992-03-27 1996-08-27 Gertel; Maurice Gas spring assembly
US5588640A (en) * 1994-10-26 1996-12-31 Mercedes-Benz Ag Air-spring leg with a pressure chamber for motor vehicles
US20080036125A1 (en) * 2001-02-14 2008-02-14 Ludger Burstedde Central Fastening Element for an Axially Symmetric Gas Spring
US7178794B2 (en) * 2002-09-10 2007-02-20 Seagate Technology Llc Fluid isolator assembly and floating elastomeric damping element
US20040119213A1 (en) * 2002-09-10 2004-06-24 Seagate Technology Llc Fluid isolator assembly and floating elastomeric damping element
US20060170140A1 (en) * 2003-06-04 2006-08-03 Thorsten Menk Spring device, especially for the rail vehicle sector
WO2005005220A1 (de) * 2003-07-15 2005-01-20 Siemens Transportation Systems Gmbh & Co Kg Zentrierende notfederabstützung
US20060180048A1 (en) * 2003-07-15 2006-08-17 Siemens Transportation Systems Gmbh & Co. Kg Emergency pneumatic spring with centering action
US20080121134A1 (en) * 2006-11-27 2008-05-29 Kadee Quality Products, Inc. Model railroad truck having polymer spring
EP2180204A2 (de) 2008-10-24 2010-04-28 ContiTech Luftfedersysteme GmbH Zusatzfeder mit Gleitfläche
DE102008037484A1 (de) 2008-10-24 2010-04-29 Contitech Luftfedersysteme Gmbh Zusatzfeder mit Gleitfläche
US20110233832A1 (en) * 2009-07-07 2011-09-29 Sumitomo Electric Industries, Ltd. Air spring for vehicle and railway truck for vehicle
US8540220B2 (en) * 2009-07-07 2013-09-24 Sumitomo Electric Industries, Ltd. Air spring for vehicle and railway truck for vehicle
CN101643073B (zh) * 2009-09-11 2011-01-19 南车株洲电力机车有限公司 地铁车辆用一系常接触弹性止挡
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DE2060960A1 (de) 1972-06-22
FR2117872B1 (it) 1976-02-13
DE2060960B2 (de) 1979-08-23
IT945346B (it) 1973-05-10
DE2060960C3 (de) 1980-04-30
FR2117872A1 (it) 1972-07-28

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