A header is rigidly attached to the ram head-end and carries a pair of forwardly extending arms and preferably also a medial tongue which at ram forward extended-station abut an outward-side and an inward-side, respectively, of the guide-lugs to avert a potential jackknifing panic situation. Easy installation and durability make it a great choice for a smoother drive. "25 Skills Every Man Should Know: Your Ultimate DIY Guide: 6. In this paper, we provide a formal definition of θcr for slow backing up of vehicle–trailer systems on a level solid surface, beyond which the vehicle must stop backing up and revert to forward motion in order to escape from jackknifing. Various means have been devised to overcome the jackknifing tendency of the trailer, without particularly satisfactory result. 8. Ears 62 and 64 are secured to the lockingarms 54 and 56 respectively as shown in FIG. 2 is a sectional elevational view taken through line 2--2 of FIG. Application filed by Meyers William G, Dirks Arthur A, LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS, Tractor-trailer combinations; Road trains, Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle, Fifth wheel traction couplings with stabilising means, e.g. A pneumatic cylinder means is connected to the locking arms for moving the arms between locked and unlocked positions with respect to the trailer. Self-propelled overland tractors traditionally include a forwardly disposed operator's cab and also a rearwardly disposed fifth wheel assembly unit having a generally horizontal skid-plate tiltably mounted on a trunnion. In FIG. When it is desired to use the trailer 12, the tractor 10 is simply connected thereto in conventional fashion so that the kingpin 30 is received in the locking slot 32. (a) a support member attachable beneath the forward end of a trailer. AIADA. 5, the numeral 74 refers to a pressure booster unit having a hydraulic master cylinder with integral reservoir. The skid-plate conventionally includes a pair of longitudinally rearwardly extending guide-lugs having outward-sides and also inward-sides horizontally angularly converging toward an upright kingpin or other pivotal association with the trailer. However, in every case, the braking area provided by the shoes and clutch plate 27 will be made sufficiently large to assure that strong braking forces will be available when required. FreePatentsOnline. An anti-jackknife device for a tractor semi-trailer combination is disclosed herein. The other end of bell crank lever is pivoted by means of a transverse pivot 42 between a pair of upstanding ears 43 formed on brackets 44 mounted on the upper face of brake shoe 32. A plurality of disc brake assemblies are secured to the underside of the fifth wheel and rotatably support a brake disc therein. A circular brake or clutch plate 27 is mounted beneath and closely adjacent base plate 23 and center section 26 and has a diameter substantially equal to the diameter of the outer periphery of slot 24. The respective guide-lugs 26 have outward-sides 26B and also have rearwardly diverging inward-sides 26A terminating at transversely opposed rear-tips 26R to provide a V-slot 27 forwardly converging for a longitudinal-length "VL" from the rear-tips 26R to kingpin 28. By closing this message, you are consenting to our use of cookies. 7. 6. A plurality of conventional disc brake assemblies 40 are fastened below the fifth wheel 24 as illustrated in FIGS. 3 and 8, to reduce friction between the clutch plate and the frame during the angular oscillations which occur during normal operation of the tractor-trailer. When a driver loses control of a large rig, like Hurricane Katrina caused here, the vehicle can jackknife, or fold into itself. 3. References Cited UNITED STATES PATENTS 2,613,946 10/1952 Anderson et a1 280432 3,036,845 5/1962 Till 280-432 3,328,051 6/1967 Hope 280-432 LEO FRIAGLIA, Primary Examiner. Wedges, which tighten against the outside of a sleeve, are a cheaper option that might not work for long. A: No. Cl. Wiley & Terrell Law Office, L.L.C. It is preferred that the pressure booster unit 74 be adapted to boost the pressure from 100 pounds per square inch to approximately 2,000 pounds per square inch hydraulic pressure so that the disc brake assemblies 40 will receive sufficient hydraulic pressure. An anti-jackknife device for a tractor semi-trailer combination is disclosed herein. 1. Therefore, it is a principal object of this invention to provide an improved anti-jackknife device. If it looks like it isn’t working like it used to, or you begin to hear noises again, don’t hesitate to take advantage of lifetime warranties. Thus far, all the structure described in conventional in nature and will not be described in detail. Orion aims for complete compatibility with this stabilizer. LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS, Tractor-trailer combinations; Road trains, Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle, Fifth wheel traction couplings with stabilising means, e.g. Could the Barnacle Windshield Blocker Replace Boot Wheel Clamps? 5. [Sept. 24, 2008] http://www.fmcsa.dot.gov/spanish/english/pdfs/abs_book.htm, Harris, James O. FIG. The bottom of the frame is covered by a base plate 23 rigidly secured to the frame members and provided with an annular slot 24 of substantial width to provide an opening therethrough for purposes to be described hereinafter, and defining a circular central plate portion 26. 7 is a schematic diagram of the pneumatic circuitry of the invention. [73] Assignee: Philip L. Haller, Omaha, Nebr. to booster 74. The fifth wheel assembly 20 includes a horizontal rest-plate 21 which rests upon and is attached to the longitudinal chassis beams 13 generally between the tractor rear wheels 12. [Sept. 24, 2008] http://www.harristechnical.com/articles/abs.pdf, Kawabe, Tsuneo, Shinji Kawai. 7. 4), and each drives a shaft 36 extending through an opening 37 in ring 25 and carries a clevis or fork 38 which is pivotally connected, by means of a pivot pin 39, to one end of a bell crank lever 40, the center of which is pivoted by means of a pivot pin 41 between a pair of lugs 42 rigidly secured to the forward face of ring 25. A device according to claim 5, including: (a) an upstanding annular flange mounted on said plate means concentric with and adjacent the inner edge of said slot, and wherein (b) said brake means includes: (i) brake cylinders mounted on said flange. They come in several different forms, including wedges, sleeves, and pins, each of which is designed to tighten down the hitch until it can’t rattle around anymore. 2, are securely mounted to the inner side of ring 25 by means of bolts 35 (FIG. The underlying base means for the trailer typically comprises several interconnected channel-irons including a pair of longitudinal-irons 31 and a plurality of transverse-irons 32. This model also adds an extra layer of security to keep your hitch from being stolen. From the foregoing, the construction and operation of the trailer anti-jackknifing apparatus will be readily understood and further explanation is believed to be unnecessary. and is located about 150 inches ahead of the vertical axis of the fifth-wheel trailer hitch, a moment or torque in the horizontal plane on the order of 1,500,000 lb-in can be produced at the hitch center. There are many types of fifth wheel assemblies and the locking mechanisms on the fifth wheels vary from one model to another so that details of the kingpin locking arrangement will not be shown for purposes of conciseness. 5 is a schematic view directed toward a remotely controlled actuation means for the reciprocating ram and header combination of the present invention. As will be hereinafter pointed out in greater detail, the anti-jackknifing apparatus comprises a generally horizontal longitudinally extending elongate ram (40) terminating as a forward head-end 42, which ram head-end 42 has an inactive rearward normal-station and also a forward anti-jackknifing extended-station at skid-plate 25. A hub 50 is secured to the brake disc 48 by bolts 52. An air-hydraulic booster system is operatively connected to the disc brake assemblies to provide the necessary pressure thereto. In accordance with the preferred embodiment of the present invention, the structure comprises a support or a frame, generally rectangular in shape, to be securely mounted beneath the forward end of the trailer and to which is connected the usual king pin. Anti-jackknife device for fifth-wheel tractor-trailer connections, VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES, Arrangements of braking elements, i.e. 1; FIG. The tractor has a conventional fifth wheel mounted at the rearward end thereof and the trailer has a kingpin extending downwardly from the lower forward end thereof for detachable connection with the fifth wheel. Thus, as the tractor moves over the road, any angular displacement of the trailer 12 with respect to the tractor 10 causes the hub 50 and brake disc 48 to rotate with respect to the fifth wheel since the recesses 36 and 38 cause the locking arms to move therewith. Other ‘Accessories’ Reviews You Might Like: Technology, performance and design delivered to your inbox. Upon such averting of jackknifing, the operator/driver through switch "S" vents the compressed-air at "V.REL." Imagine putting your hand on a part of your dashboard or cup holder to keep it from rattling while you drive—it’s the same principle. A brake assembly stator or bottom plate 16 is secured to the other end of the axle 15. 4 is a sectional view seen along lines 4-4 of FIG. B62d 13/00, 53/08 8 Claims ABSTRACT OF THE DISCLOSURE Backgrozmd 0f the invention Jackknifing is the term commonly applied to the swinging of a trailer out of the normal path of travel of the tractor to which it is connected as a result of various conditions encountered during travel of the vehicle, with frequently disastrous results, both to the tractor-trailer vehicle and to other tralfic on the roadway. [Sept. 24, 2008] http://www.freepatentsonline.com/US7175194.html, Byrnes, Mike & Associates. a plurality of disc brake assemblies secured to said fifth wheel means adjacent said bottom portion. Mike Byrnes & Associates, Inc., 2004. 1 phantom lines, the trailer central-axis 30A should not be allowed to deviate more than W° about kingpin pivot-axis 28, the numerical value of W° being typically within the range of 5° to 15°, and substantially some 10°. You can compare up to three products. "It's tow time." The respective brackets 55 and 56 have a plurality of spaced vertical holes 54 for passage of upright bolts 57 to permit selection of the distance between collar 50 and skid-plate 25. R. LONG 3,430,986 ANT'I-JACKKNIFE DEVICE FOR FIFTH-WHEEL J. R. LONG ANTI-JACKKNIFE DEVICE FOR FIFTH-WHEEL March 4, 1969 TRACTOR-TRAILER commcnons Sheet Filed June 27, 1967 HHimm INVENTOR @9944.