US3773394A - Flexible track belts - Google Patents

Flexible track belts Download PDF

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Publication number
US3773394A
US3773394A US00093033A US3773394DA US3773394A US 3773394 A US3773394 A US 3773394A US 00093033 A US00093033 A US 00093033A US 3773394D A US3773394D A US 3773394DA US 3773394 A US3773394 A US 3773394A
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United States
Prior art keywords
belt
elastomer
track
support
flexible track
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Expired - Lifetime
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US00093033A
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English (en)
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C Grawey
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Caterpillar Inc
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Caterpillar Tractor Co
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Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B15/00—Wheels or wheel attachments designed for increasing traction
    • B60B15/02—Wheels with spade lugs
    • B60B15/04—Wheels with spade lugs with resiliently-mounted spade lugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B15/00—Wheels or wheel attachments designed for increasing traction
    • B60B15/18—Wheels with ground-engaging plate-like shoes
    • B60B15/20—Wheels with ground-engaging plate-like shoes with resiliently-mounted shoes, e.g. on a spider
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/02—Replaceable treads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C27/00—Non-skid devices temporarily attachable to resilient tyres or resiliently-tyred wheels
    • B60C27/20—Non-skid devices temporarily attachable to resilient tyres or resiliently-tyred wheels having ground-engaging plate-like elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2433/00—Closed loop articles

Definitions

  • sible filaments encased in elastomer retain a plurality of circumferentially disposed track shoes which are attached to these support belts through an elastomeric couple in which shaped keepers are employed to compressively load the elastomer at the couple to secure the track shoes to the internal inextensible filaments of the support belts.
  • a dense elastomer insulated joint is formed wherein direct physical contact by the track shoes and/or the keepers with these filaments is avoided and a resulting couple. is obtained which prevents slipping movement between the track shoes and the filaments.
  • the resulting trackbelt system can be employed about the periphery of pneumatic tire carcasses to increase traction, protect the carcass, etc.
  • ATTORNEYS FLEXIBLE TRACK BELTS BACKGROUND OF THE INVENTION mounted about the periphery of a pneumatic tire carcass.
  • the current invention is. primarily related to the latter type having limited universal relative movement between adjacent track shoes and is designed to overcome many of the troublesome problems experienced with the prior art syste'rns.
  • an object of the instant: invention is the provision of a highly flexible support belt system that has sufi'icient strength to adequately hold the circumferentially disposed track shoes and radial preloads from the supporting pneumatic carcass while also providing the needed service-life required in earthworking vehicles.
  • Another important object is the provision of an elastomeric couple between the inextensible reinforcing filaments in the flexible support belts and the track shoes which provides insulation between these parts without slippage therebetween.
  • Another object is provision of a flexible track belt which can be manufactured economically in all sizes.
  • a flexible track belt includes several flexible circular support belts with each belt having internal inextensibl e reinforcing filaments wound therein and encased in elastomer, a plurality of track shoes circumferentially arranged about the circular support belts and oriented transversely thereto and attaching means for each track shoe to couple it to the support belts, the attaching means having shaped retaining means for receiving the support belt and clamping means to compressively load the elastomer encasing the reinforcing filaments whereby a dense elastomeric couple between the track shoes and the filaments is formed through the attaching means without direct physical contact due to the insu-- lation provided by the elastomer.
  • the retaining means for the support belts must be shaped in a manner to prevent the extrusion of the elastomer when it undergoes compressive loading in the area of the elastomeric couple so adequate density is achieved to prevent slippage of the attaching means relative to the reinforcing filaments in the support belts.
  • the resulting flexible track belts can be employed about the periphery of a pneumatic tire carcass to form a reliable track encircled tire combination for work vehicle.
  • Radially reinforced tire carcasses are preferred in such a track encircled tire combination, with filament wound tube tire carcasses combining with the track belts to form the most preferred and superior perfonning arrangement when the track belts are used in this manner.
  • FIG. 1 is a perspective of a work vehicle with the flexible track belts mounted on its pneumatic tires illustrating an earth-working environmental application thereof;
  • FIG. 2 is a section through a belted tire of one of the wheels of the work vehicle shown in FIG. 1 with parts broken away;
  • FIG. 3 is a broken away elevation of the belted tire shown in FIG. 1;
  • FIG. 4 is an exploded section of an alternate embodiment of the flexible track belt
  • FIG. 5 is an elevation of the flexible track belt in which the retaining member or keeper is extended to limit the travel of an adjacent track shoe due to an overlapping relationship;
  • FIGS. 6 and 6A are perspectives illustrating another embodiment of the flexible track belt in which only two support belts are employed;
  • FIG. 7 is an enlarged section of a sidewall retention device which can be employed in place of the centering lugs illustrated in FIGS. 6 and 6A with the two support belt embodiments;
  • FIG. 8 is a broken away perspective of an individual support belt illustrating some of its internal construction details
  • FIG. 9 is a perspective of a filament winding machine for fabricating the support belts.
  • FIG. 10 is a section of a support belt having fabric disposed between the layers or plies of reinforcing filaments;
  • FIG. 11 is a broken away perspective of a portion of the drum of the machine illustrated in FIG. 9 showing the simultaneous application of multiple reinforcing filaments;
  • FIGS. 12 and 13 illustrate in section and elevation, respectively, a belleville spring clamping device to compressively load the elastomer in the elastomeric couple
  • FIG. 14 is an elevation of an arcuate retaining means which will shorten the support belts as the track shoes with a compatible surface are tightened against the retaining means;
  • FIG. 15 is a perspective of a filament wound tube-tire carcass providing the most preferred carcass with which the track belt can be combined.
  • FIG. 1 An earth-working machine is illustrated in FIG. 1 wherein flexible track belts 21 have been assembled on its pneumatic tire carcasses 22.
  • This is one of the principal environmental applications for which the current flexible track belts were designed.
  • the flexible track belts may appreciably increase the tractive effort capability of such a vehicle. In some situations, this increased capability can exceed the structural capability of the drive train.
  • the tractive effort may be much less than a contemporary vehicle with conventional rubber tires. Therefore, it should be appreciated that the flexible track belts of this invention, which employ a unique elastomer couple, are usually employed in specialized applications wherein large economies can be experienced through their use, for
  • the track belt Besides acting as a shield in certain environments, the track belt provides increased machine stability, improved floatation, and better steering response in many applications. Better load distribution in the footprint also is achieved which contributes their many advantages.
  • Prior art devices have traditionally been incapable'of attaching or retaining the individual track shoes'on flexible belts for extended periods of time without resulting in belt failure due to slippage between the shoes and the support systems or wear in the support system. If the support reinforcing such as cables are physically gripped with sufiicient force to prevent slippage, it is often crushed, flattened or nicked encouraging its failure contiguous to such attachments. If the support system is not physically secured, the track shoes tend to slip causing excessive wear and/or flexure therein. In addition, the prior art designs, because of the above factors and others, are normally incapable of achieving some uniform load distribution on the reinforcing members or filaments of the support systems.
  • the reinforcing flexible support system must be substantially inextensible in order for the track belt to be retained on tire carcass, if combined therewith, and provide sufficient strength to allow the transfer of torque between the tire carcass and the track shoes, prior art devices often employed large cables or wires which resulted in poor load distribution causing failures.
  • FIG. 2 the different construction of the instant invention can be seen in detail wherein track shoe 30 with grousers 31 is attached with tap bolts 32 to a retainer member or a keeper 33 having channels 34 for receiving the supporting belts 35, which in this embodiment are connected together by a thin elastomer web between the channels in the keepers, but are shown as independent belts in FIG. 4, an alternate embodiment.
  • the space A between the track shoe base 30a and the tops of the ridges 36 of the keeper 33 is critical with reference to the thickness of the individual belts, since it would be impossible to obtain the desired preload or compressive loading on the elastomer surrounding the reinforcing filaments of the support belts 35 for the elastomeric couple necessary to join the track shoes and the support belts in a manner which is compatible with the small diameter inextensible reinforcing employed in this invention, if this space or gap was not present.
  • high torques can be transferred between the inextensible reinforcing filaments within the belts and the individual track shoes without direct physical contact by placing the encasing elastomer under high compressive loading, preferably from l,500-5,000 psi, in the area of the couples. Since the elastomer is substantially incompressible and exhibits resiliency through elastomer flow, it is necessary that the couple employ means to prevent the flow (extrusion) of the elastomer if a satisfactory couple is to be achieved.
  • the individual channel 34 in the keepers closed by the cooperating base 30a of the track shoe 30 contains the elastomer, except along the generally parallel axes of its internal reinforcing filaments (the open ends of the channels).
  • the filaments are preferably brass plated to improve elastomer adhesion thereto,
  • Each rivet has an integral head 43 and is assembled in its bore with belleville springs 44'nested thereon so they can be compressed against the outer surface of the keeper as the head is moved toward the keeper.
  • the rivets which fit loosely in their respective bores are positioned to extend through apertures 45 in the associated track shoe after the support belts 35 are placed in channels 34 of the keeper.
  • a press is then employed to compress the belleville springs and the ends of the rivets extending through track shoes are peenedto secure the rivets in their associated track shoes, after which the assembled parts are removed from the press.
  • the belleville springs will maintain the desired compressive loading in the elastomer couple and compensate forany stress relaxation in the elastomer as it occurs.
  • this arrangement eliminates the necessity of torquing the tap bolts 32at periodic intervals.
  • the belleville springs and rivets can be counter sunk in the keeper to provide a smooth undersurface where keeper engages the supporting pneumatic carcass.
  • centering lugs 46' are utilized in the central portion of each track shoe 30 on its base surface 30a which are received in a cooperating groove (not shown) in the supporting pneumatic tire carcass.
  • FIG.'7' An alternate centering device which cooperates with the sidewall of the pneumatic tire carcass 22 is illustrated in FIG.'7'.
  • the retaining member or keeper 33 having the shaped channel 34 for the flexible support belt 35 includes a radially inwardly projecting: leg 33a which engages the sidewall of the tire carcass 22 at point B which is well below the crown C of the tire carcass with the track belt assembled thereon.
  • leg 33a This'arran'gernent 'will also'prevent transverse displacement of the track belt" on the tire-carcass under 9, 10 and 11.
  • th ese support belts have internal inextensible reinforcing fiIa'ments SO which are encased in elastomer 51.
  • the reinforcing typically has been large diameter cables or wires;
  • the instant invention employs very small diameterwires, or cables by'comparison, usually brass" plated, to improve the adhesion of the elastomer thereto, which are preferably wound in a helical manner in the belts forming a series of connected loops.
  • Mono-filament steel wires having high tensile strength and a diameter from 0.005 to 0.050 inch are normally utilized to form the helically wound reinforcing filaments in the support belts.
  • Several of these fila ments may be first twistedloosely together and applied in thesame manner as a single filament.
  • the diameters of the reinforcing filaments 50 are exaggerated for purposes of illustration and their density in the cross-section reduced for clarity.
  • the flexible support belts can be fabricated on the winding machine shown in FIG. 9.
  • a motor 61 drives a drum 62 of an appropriate diameter on which a thin layer of elastomer is applied to its peripheral flat surface 63. Thereafter, a layer or ply of reinforcing is applied by helically winding the wire 50 from spool 64 on the previously-applied elastomer layer through the level winding guide 65.
  • FIG. 10 where the layers or plys E of elastomer 51and layers or plys W of the wires 50 are clearly illustrated in the resulting laminated or sandwich structure of the support belts 35.
  • a bobbin 66 is employed to helically wind multiple wires 50 to speed the fabrication of the belts, and it should also be appreciated that the thickness of -the elastomer plys E are exaggerated for the purpose of illustration.
  • the elastomer layers will be in the range of 0.050 to 0.250 inches and will lose their individual identity when the belts are fabricated due to fusion with adjacent layer through the'wire plies.
  • the belts are fabricated so the wire filaments 50 will be insulated from oneanother by the elastomer as graphically illustrated in FIG. 10 wherein layers F of fabric have been placed between the wire plies W to make the belts somewhat more resistant to elastomer flow. Even if several wires are applied loosely twisted together, the elastomer will still tend to insulate them from one another. Generally, the elastomer is applied in an uncured condition, and after the belt is finished, the drum can be wrapped with shrink tape'if desired, and the belt is then cured by removing the drum from the winding machine 60 and placing it in an autoclave.
  • the small diameter wires 50 to form the reinforcing filaments in the support belts 35, excellent flexibility is obtained with adequate strength since these individual wires have tensile strengths from 275,000 to 425,000 psi. Because of their small diameters, the wires in the belts develop little internal stress during bending in contrast to large diameter, prior art wires or cables wherein the outside diameter (CD) of the cable reinforcing rings are under tension while the inner diameter (ID) is under compression as the track belt passes through the footprint of the tires. This condition causes loads to be unevenly distributed in larger diameter reinforcing filaments causing failure.
  • CD outside diameter
  • ID inner diameter
  • the wire plies W of the reinforcing filaments of the support belt of this invention are parallel to the bending axis as the track belts pass through the footprint and are also very close to the neutral bending axis.
  • these wire plies be located close to the neutral bending axis of the support belts 35 so that more even load distribution on all of the plies can occur. As a result, thick support belts are less desirable than the thinner belts.
  • the elastomer 51 protects and insulates the reinforcing filaments from the track shoes and their associated keepers while the compressive loading on the elastomer forms a non-slip couple between them. While many compositions are suitable, the elastomer generally employed in the support belts is a natural rubber composition having the following characteristics:
  • a suitable composition is:
  • This composition is cured at 280F. from 2.5 to 8.0 hours, depending on thickness.
  • composition of the elastomers employed between the support belts in some embodiments can vary from that set forth above.
  • Track belts made according to this invention have been successfully field tested in earth-working environments, and were found suitable for rock work on a loader having a 64-inch tire carcass.
  • Such a bond increases the capacity to transfer torqueplied as a loosely twisted cable having several strands.
  • Such small cables are substantiallyinextensible in com-'" parison to large cable or wire; rope, 'used in the prior art, and function substantially the same as the individual wires, especially when their individual wires are insulated from each other by the elastomer so the fatigue life of the wires will not be reduceddue to fretting.
  • the completed track belt is assembled on a pneumatic tire carcass having a design profile somewhat larger than the ID of the track belt, by partially collapsing the conventional tire carcass. After the track belt is in place, the tire is inflated and the radial growth of the carcass is constricted by the track belt to a diameter under its normal design profile.
  • a similar technique may be employed by also restricting its radial growth with the track belt.
  • the instant track belt can be advantageously combined with a radially reinforced tire carcass, such as disclosed in US. Pat. No. 2,874,742 issued to Lugli when the track belt of this invention is employed in place of the tread belt shown in Lugli.
  • the track belt of this invention will be sized to constrict the carcass to an oval configuration when assembled thereon. The pressure in the carcass will adequately secure the track belt on the tire preventing both circumferential and transverse slippage on the carcass.
  • the disclosures of Lugli concerning the carcass construction is incorporated herein by reference.
  • the track belts are preloaded and, therefore, must be strong enough to accept the torque through the track shoes along with the preload which in a 64-inch tire could be in the range of 100,000 pounds.
  • the necessary belt strength can be obtained for the required service condition with thesetypes of carcasses.
  • the keepers 33 include arcuate surfaces in their channels to shorten the belts as the tap bolts 32 are tightened to achieve the compressive loading.
  • FIG. 14 An example of a suitable arrangement is illustrated in FIG. 14. Since carcass 2 2. In such an embodiment, the coefficient of friction between the mating rubber surfaces is generally sufficient to prevent transverse movement of the track belt on the carcass and insure adequate drive to transmit the necessary torque.
  • a lug 71 is employed: in.
  • the instant track belts are usedover conventionalbias angled tire carcasses which shortentheir circumference when deflected, thetrack belts, having a I QQHStfintcircumference,' may tend to shift laterally .(transversely) on these type carcasses.
  • the centering devices described above will be typically 'employeclwith bias angle tire carcasses, aiid notwith the hon belted radial carcasses.
  • bias angle tire carcasses and belted radial tire carcasses the drive between track belt and the carcass may not be so'positive.
  • si rnplistic but it does. serve to; illustrate, that the. couple isjnot rigid in .thesense of metal physically clamped against; the filament. In'this; couple, the; wires canand do. move to some; extent-along their axisduring bending of the beltsjthereby lessening-high localized tension:-
  • sible filament 81 helically'iwound around a 1 torusshaped elastomer liner 82 andthe resultingloopsl'covered with an outer elastomer casing 83.
  • the air chambet is inflated through valve stem 84. and when thecar-..
  • cass is mounted on a rim with the track belt encircling its outer periphery the oval configurationis maintained as the tire is pressurized'isince'the track belt is inextensible. Deflection of this't'ube' tire-carcass' occurs in the sidewalls and allows the outer circumference of the carcass to remain substantially constant, becoming less oval in the portions of the carcass away from the deflection point. Thus the track belt is -tigh'tly' retained on the carcass.
  • An internal bumper 85 maybe employed 7 to limit the deflection and a centering rib86 may be employed with cooperating rim structures to position the tire carcass thereon.
  • Roll restraining hoops 87 at the base of the sidewalls and positioned'inside the helically wound reinforcing prevent the carcass from rolling off the rim dueto lateral loadings.
  • inextensible reinforcing filaments such as high tensile strength steel 'wires having diameters from 0.005 to 0.050 inches,.which are employed in the track belt.
  • Other filaments meeting the tensile strength requirements' can be employed if they have a'total elongation of less than 5 percent.
  • a filament or small cable formed of such filaments which have a total elongation of less than 5 percent shall be considered to be inextensible in the con What is claimed is:
  • a flexible track belt comprising:
  • At least one flat elastomer endless support belt having a centrally disposed inextensible reinforcing ply of circularly wound inextensible reinforcing filaments in a side-by-side relationship therein to form connected loops of substantially equal diameters forming at least one cylindrical ply with filaments individually encased by elastomer;
  • each of said attaching means having an outer belt engaging member and an inner keeper member, each of said inner keeper members having a-belt conforming channel recess with a uniform recess cross-section therein, said keeper members arranged at circumferentially v spaced intervals about the inner peripheral surface of said support belt and integrally formed with said support belt so elastomer portions of said support belt separate adjacent edges of said keeper means from one another thereby providing a continuous inner surface, each of said keeper members confincouple formed therebetween as the elastomer is densified by said force.
  • each of the attaching means is adjustable and operable to vary the force on the portion f the elastomer belt within its keeper member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Tires In General (AREA)
US00093033A 1970-11-27 1970-11-27 Flexible track belts Expired - Lifetime US3773394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9303370A 1970-11-27 1970-11-27

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US3773394A true US3773394A (en) 1973-11-20

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US (1) US3773394A (fr)
JP (1) JPS5543951B1 (fr)
AU (1) AU450999B2 (fr)
BE (1) BE775929A (fr)
CA (1) CA962563A (fr)
DE (1) DE2159000C3 (fr)
FR (1) FR2116077A5 (fr)
GB (1) GB1367524A (fr)
IT (1) IT945143B (fr)

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3902765A (en) * 1974-07-26 1975-09-02 Us Army Tension control for flexible tire connectors
US3902766A (en) * 1974-07-26 1975-09-02 Us Army Traction control for vehicles equipped with orbiting tires
US3948707A (en) * 1972-08-22 1976-04-06 Caterpillar Tractor Co. Flexible sealed track belt
DE2608795A1 (de) * 1975-03-03 1976-09-16 Caterpillar Tractor Co Gleiskettenschuh mit greifrippen
US4010789A (en) * 1975-09-02 1977-03-08 International Harvester Company Anchor plate tire
US4013112A (en) * 1975-09-02 1977-03-22 International Harvester Company Anchor plate tire having a sub-lug equipped anchor plate
US4043609A (en) * 1975-10-06 1977-08-23 International Harvester Company Armored tire having a flexible tapered belt arrangement
US4056288A (en) * 1976-03-01 1977-11-01 Caterpillar Tractor Co. Endless track for crawler vehicles
US4057302A (en) * 1976-01-05 1977-11-08 The Goodyear Tire & Rubber Company Removable tread belt
US4059313A (en) * 1976-09-27 1977-11-22 Caterpillar Tractor Co. Track belt assembly
US4070071A (en) * 1976-02-09 1978-01-24 The Goodyear Tire & Rubber Company Traction element for removable track
US4075048A (en) * 1975-10-31 1978-02-21 Owens-Corning Fiberglas Corporation Method for producing a bead for a pneumatic tire
US4081013A (en) * 1976-01-05 1978-03-28 The Goodyear Tire & Rubber Company Traction shoe seal
US4132258A (en) * 1975-10-06 1979-01-02 International Harvester Company Armored tire
US4230511A (en) * 1979-01-24 1980-10-28 The Goodyear Tire & Rubber Company Curing a replaceable tread for a big tire
US4241956A (en) * 1978-06-12 1980-12-30 Caterpillar Tractor Co. Track assembly for crawler-type vehicles
EP0025183A2 (fr) * 1979-09-11 1981-03-18 Caterpillar Tractor Co. Chenille à patins flexibles et/ou plaques d'ancrage flexibles
US4258768A (en) * 1979-12-26 1981-03-31 The Lamson & Sessions Co. Fastener assembly
US4368929A (en) * 1977-05-05 1983-01-18 Caterpillar Tractor Co. Sealed track belt arrangement
US4480670A (en) * 1980-12-29 1984-11-06 The Goodyear Tire & Rubber Company Track belt assembly
US4844560A (en) * 1987-10-28 1989-07-04 Edwards, Harper, Mcnew & Company Endless drive track joint assembly
US4861120A (en) * 1987-05-14 1989-08-29 Edwards, Harper, Mcnew & Company Modular endless track drive system and methods of making, installing and repairing same
WO1989008041A1 (fr) * 1988-03-02 1989-09-08 Williames Hi-Tech International Pty. Ltd. Support de chenilles pour machines agricoles
US4884852A (en) * 1987-05-14 1989-12-05 Edwards, Harper, Mcnew & Company Double V-shaped endless track drive system
US4906054A (en) * 1987-05-14 1990-03-06 Edwards, Harper, Mcnew & Company Endless track drive system
USRE33324E (en) * 1983-07-25 1990-09-04 Edwards, Harper, McNew & Co. Endless drive system
US5005922A (en) * 1987-05-14 1991-04-09 Edwards, Harper, Mcnew & Company Double V-shaped endless track drive system
US5005921A (en) * 1987-05-14 1991-04-09 Edwards, Harper, Mcnew & Company Endless track drive system
US5020865A (en) * 1988-01-20 1991-06-04 Edwards, Harper, Mcnew & Company Endless drive track joint assembly
US5040282A (en) * 1987-05-14 1991-08-20 Edwards, Harper, Mcnew & Company Method of making a modular endless track drive system
EP0493875A1 (fr) * 1990-12-20 1992-07-08 Bridgestone Corporation Chenille en caoutchouc
WO1995005947A1 (fr) * 1993-08-20 1995-03-02 Airboss Limited Moyens de prise au sol
US6217125B1 (en) * 1999-02-16 2001-04-17 Louis Raymond Tubetto Safety wheel assembly
US6287498B1 (en) * 1999-12-15 2001-09-11 Xerox Corporation Process of making flexible belts by pultrusion
US6299265B1 (en) * 1999-12-27 2001-10-09 Ronald J. Hoffart Replaceable tire gripping system for endless track
US6561241B2 (en) 2001-04-23 2003-05-13 The Goodyear Tire & Rubber Company Two piece tire with improved tire tread belt and carcass
US6652043B2 (en) * 2000-04-20 2003-11-25 Caterpillar Inc Reduced sound transmitting idler for track-type vehicles
US20070035077A1 (en) * 2005-08-10 2007-02-15 First Data Corporation Sideways sheet feeder and methods
CN103552615A (zh) * 2013-10-23 2014-02-05 嘉善久久车轮制造有限公司 冲压式复合履带车轮
US20140345761A1 (en) * 2013-05-24 2014-11-27 Ontario Drive & Gear Limited Wheel
US9211922B2 (en) 2012-08-17 2015-12-15 Cardinal Gibbons High School Robotic vehicle having traction and mobility-enhanced wheel structures
US10144462B2 (en) * 2014-03-04 2018-12-04 Prinoth S.P.A. Crawler vehicle drive system and crawler vehicle comprising such a drive system

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CA988562A (en) * 1972-08-22 1976-05-04 Robert W. Untz Flexible sealed track belt
US4071068A (en) * 1976-01-05 1978-01-31 The Goodyear Tire & Rubber Company Removable track belt with removable keeper bar
GB2164616B (en) * 1984-09-26 1988-04-07 Dunlop Ltd Tracks for track-laying vehicles
JPS6313437U (fr) * 1986-07-14 1988-01-28
DE3625416C1 (de) * 1986-07-28 1988-04-14 Rud Ketten Rieger & Dietz Reifenkette,insbesondere Gleitschutzkette fuer Fahrzeugreifen
JPH02115063U (fr) * 1989-03-02 1990-09-14
ATE110647T1 (de) * 1989-12-27 1994-09-15 Sumitomo Wiring Systems Gleitschutzkette für kraftfahrzeugreifen.
DE102011008411A1 (de) * 2011-01-12 2012-07-12 Bernhard Spindler Gleitschutzvorrichtung

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US2392988A (en) * 1942-07-15 1946-01-15 Wingfoot Corp Tractor and tank track
US2414822A (en) * 1943-06-25 1947-01-28 Dayton Rubber Mfg Co Wire reinforced belt
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US3948707A (en) * 1972-08-22 1976-04-06 Caterpillar Tractor Co. Flexible sealed track belt
US3902766A (en) * 1974-07-26 1975-09-02 Us Army Traction control for vehicles equipped with orbiting tires
US3902765A (en) * 1974-07-26 1975-09-02 Us Army Tension control for flexible tire connectors
DE2608795A1 (de) * 1975-03-03 1976-09-16 Caterpillar Tractor Co Gleiskettenschuh mit greifrippen
US4010789A (en) * 1975-09-02 1977-03-08 International Harvester Company Anchor plate tire
US4013112A (en) * 1975-09-02 1977-03-22 International Harvester Company Anchor plate tire having a sub-lug equipped anchor plate
US4043609A (en) * 1975-10-06 1977-08-23 International Harvester Company Armored tire having a flexible tapered belt arrangement
US4132258A (en) * 1975-10-06 1979-01-02 International Harvester Company Armored tire
US4075048A (en) * 1975-10-31 1978-02-21 Owens-Corning Fiberglas Corporation Method for producing a bead for a pneumatic tire
US4057302A (en) * 1976-01-05 1977-11-08 The Goodyear Tire & Rubber Company Removable tread belt
US4081013A (en) * 1976-01-05 1978-03-28 The Goodyear Tire & Rubber Company Traction shoe seal
US4070071A (en) * 1976-02-09 1978-01-24 The Goodyear Tire & Rubber Company Traction element for removable track
US4056288A (en) * 1976-03-01 1977-11-01 Caterpillar Tractor Co. Endless track for crawler vehicles
US4059313A (en) * 1976-09-27 1977-11-22 Caterpillar Tractor Co. Track belt assembly
US4368929A (en) * 1977-05-05 1983-01-18 Caterpillar Tractor Co. Sealed track belt arrangement
US4241956A (en) * 1978-06-12 1980-12-30 Caterpillar Tractor Co. Track assembly for crawler-type vehicles
US4230511A (en) * 1979-01-24 1980-10-28 The Goodyear Tire & Rubber Company Curing a replaceable tread for a big tire
EP0025183A2 (fr) * 1979-09-11 1981-03-18 Caterpillar Tractor Co. Chenille à patins flexibles et/ou plaques d'ancrage flexibles
EP0025183A3 (en) * 1979-09-11 1981-04-08 Caterpillar Tractor Co. Track belt with flexible track shoes and/or anchor plates
US4258768A (en) * 1979-12-26 1981-03-31 The Lamson & Sessions Co. Fastener assembly
US4480670A (en) * 1980-12-29 1984-11-06 The Goodyear Tire & Rubber Company Track belt assembly
USRE33324E (en) * 1983-07-25 1990-09-04 Edwards, Harper, McNew & Co. Endless drive system
US4861120A (en) * 1987-05-14 1989-08-29 Edwards, Harper, Mcnew & Company Modular endless track drive system and methods of making, installing and repairing same
US4884852A (en) * 1987-05-14 1989-12-05 Edwards, Harper, Mcnew & Company Double V-shaped endless track drive system
US4906054A (en) * 1987-05-14 1990-03-06 Edwards, Harper, Mcnew & Company Endless track drive system
US5005922A (en) * 1987-05-14 1991-04-09 Edwards, Harper, Mcnew & Company Double V-shaped endless track drive system
US5005921A (en) * 1987-05-14 1991-04-09 Edwards, Harper, Mcnew & Company Endless track drive system
US5040282A (en) * 1987-05-14 1991-08-20 Edwards, Harper, Mcnew & Company Method of making a modular endless track drive system
US4844560A (en) * 1987-10-28 1989-07-04 Edwards, Harper, Mcnew & Company Endless drive track joint assembly
US5020865A (en) * 1988-01-20 1991-06-04 Edwards, Harper, Mcnew & Company Endless drive track joint assembly
WO1989008041A1 (fr) * 1988-03-02 1989-09-08 Williames Hi-Tech International Pty. Ltd. Support de chenilles pour machines agricoles
US5131215A (en) * 1988-03-02 1992-07-21 Williames Geoffrey Allan Track support for agricultural machines
EP0493875A1 (fr) * 1990-12-20 1992-07-08 Bridgestone Corporation Chenille en caoutchouc
WO1995005947A1 (fr) * 1993-08-20 1995-03-02 Airboss Limited Moyens de prise au sol
US6217125B1 (en) * 1999-02-16 2001-04-17 Louis Raymond Tubetto Safety wheel assembly
US6287498B1 (en) * 1999-12-15 2001-09-11 Xerox Corporation Process of making flexible belts by pultrusion
US6299265B1 (en) * 1999-12-27 2001-10-09 Ronald J. Hoffart Replaceable tire gripping system for endless track
US6652043B2 (en) * 2000-04-20 2003-11-25 Caterpillar Inc Reduced sound transmitting idler for track-type vehicles
US6561241B2 (en) 2001-04-23 2003-05-13 The Goodyear Tire & Rubber Company Two piece tire with improved tire tread belt and carcass
US20030098110A1 (en) * 2001-04-23 2003-05-29 The Goodyear Tire & Rubber Company Two piece tire with improved tire tread belt and carcass
US20070035077A1 (en) * 2005-08-10 2007-02-15 First Data Corporation Sideways sheet feeder and methods
US7516949B2 (en) 2005-08-10 2009-04-14 First Data Corporation Sideways sheet feeder and methods
US9211922B2 (en) 2012-08-17 2015-12-15 Cardinal Gibbons High School Robotic vehicle having traction and mobility-enhanced wheel structures
US20140345761A1 (en) * 2013-05-24 2014-11-27 Ontario Drive & Gear Limited Wheel
US9539856B2 (en) * 2013-05-24 2017-01-10 Ontario Drive & Gear Limited Wheel
CN103552615A (zh) * 2013-10-23 2014-02-05 嘉善久久车轮制造有限公司 冲压式复合履带车轮
US10144462B2 (en) * 2014-03-04 2018-12-04 Prinoth S.P.A. Crawler vehicle drive system and crawler vehicle comprising such a drive system

Also Published As

Publication number Publication date
AU450999B2 (en) 1974-07-09
DE2159000B2 (de) 1981-01-08
DE2159000A1 (de) 1972-05-31
CA962563A (en) 1975-02-11
GB1367524A (en) 1974-09-18
JPS5543951B1 (fr) 1980-11-10
AU3582971A (en) 1973-05-24
BE775929A (fr) 1972-05-26
FR2116077A5 (fr) 1972-07-07
IT945143B (it) 1973-05-10
DE2159000C3 (de) 1981-08-27

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