Патент USA US2408532код для вставки
w I‘ ET AL TRAILER 2,408,531 ‘ HITCH " I Filed Dec. 18, 1944 BT51 /9 P1 17.2. ‘ IIIIIIIIIIIIA ‘ | ‘ I; . INVEN TORS - ' “Arm/WE)’; _ Patented Get. 1, 1946 ' 2,408,531 UNITED STATES ‘PATENT OFFICE TRAILER HITCH Howard C. Riemann, West Milwaukee, and Joel E. Thorp, West Allis, Wis., assignors to The Fulton Company, West Allis, Wis., a corpora tion of Wisconsin Application December 18, 1944, Serial No. 568,576 13 Claims. (Cl. 280-33A4) 2 1 , provides a dangerous and obstructive outwardly Our present invention relates generally to im provements in devices for facilitating attachment projecting part adapted to cause injury‘ or damage. of one vehicle to another, and relates more spe ci?cally to improvements in the construction and It is therefore a more speci?c object of our in operation of trailer hitches for motor driven Cl vention to provide an improved trailer hitch for vehicles such as automobiles, tractors or the streamlined vehicles such as standard automo biles of various models, which may be conven The primary object of this invention is to pro iently applied to diverse types of vehicles in an vide an improved trailer, hitch which is simple in effective manner, and all portions of which may , construction, flexible in its adaptations, and e?'i 10 be readily concealed when not in actual use. cient in use. , Anotherspeci?c object of the invention is to like. . ‘ e provide an improved durable and strong acces sory for connecting one of the elements of a trailer coupling to a suitable portion of a draft . While numerous types of so-called trailer cou plings for connecting trailers to draft vehicles such as tractors and automobiles, have hereto-» vehicle, and which is quickly adjustable to ?t vehicles of different styles or types. A further speci?c object of this invention is to provide an improved draft assemblage which is , fore been used extensively, considerable difficulty has been encountered in attempting to apply these couplings to modern streamlined vehicles wherein‘suitable points of attachment are nor mally concealed by the bodies, fenders. and bumpers and are therefore relatively inaccessible. Perhaps the most successful and extensively used trailer coupling, comprises in general a socketed member adapted to be attached to the draft bar of the trailer, and a ball member normally coact ing with the socket of the trailing member and 25 formed for attachment to some durable and sturdy portion such as the frame of the draft vehicle. However, in the latest streamlined automobile models, it is impossible to conven iently attach accessories such as coupling draft’ attachable to the normally concealed frames of streamlined automobiles or the like, and which may be readily adjusted or placed into an invis-l ible position and concealed and protected by the bumper of the car to which it is applied. 7 Still another specific object of our invention is to provide an improved trailer coupling hitch which may be manufactured and sold at moder ate cost, which may be readily applied to or re moved from a vehicle by a novice, and which avoids interfering with the normal use of the vehicle bumper bar when the hitch is inactive. vmembers directly to the frame and bumper be These and other speci?c objects and advan cause of the concealment of the rear frame-‘por . tions and obstructions produced by relatively thin tages of the invention will be apparent from the following detailed description. coverings such as sheet metal bodies, fenders, and . splash plates; These. sheet metal parts are in sufficiently strong to withstand the pull induced A clear conception of the several features con 35 stituting the present improvement, and of the construction and operation of trailer hitches em bodying the invention, may be had by referring by a trailing vehicle, and in many cases even the bumpers are not sufficiently strong. In most to the drawing accompanying and forminga part of this specification wherein like reference char - cases, the bumpers are also made inaccessible by splash pans, license plate frames, and the like, 4:0' acters designate the same or similar parts in the various views. and the bolts which attach the bumpers to the ‘ bumper brackets often become loose or havetheir ,Fig- l is a fragmentary plan view of one of threads stripped, thus permitting the bumpersto our improved trailer hitches, snowing the same drop off. The extreme diversity in design of applied to the bumper bracket of one type of bumpers also makes standardization of bumper 45 vehicle having minimum distance between an coupling clamps practically impossible, and it choring points, and also showing the coupling has heretofore been difficult to readily detachably ball member thereof in active position disposed and ?rmly attach such coupling members to outwardly beyond the rear bumper bar; streamlined vehicles. , Then too, in’ cases Where Fig.2 is a similarly fragmentary rear view of the trailer coupling israrely- used, it is undesir 50 the‘ assemblage of Fig. 1, showing, the bumper able to have the coupling draft member which is removednand the bumper bracket in section; ~attached to such a streamlined vehicle, ‘clearly Fig. 3 is another fragmentary plan view of vthe V visible. andprotruding when not in actual use, same hitch assembly, showing the same attached because such visibility of the coupling element to the bumper bracket/of another type of vehicle ; besides Amarring the appearance of the car, also 55 bumper assemblage having maximum distance 2,408,531 3 between anchoring points, and likewise showing the coupling member in active position; slidably adjustable along the bar ll, may also be formed of sheet metal with the aid of punches and dies, and the same is true of the clamps ll, 23 Fig. 4 is an enlarged transverse section through of the draft plate l9, thereby facilitating the new trailer hitch, taken near its mid portion quantity production of the entire accessory. and showing the ball coupling member in active Standard carriage bolts l8 may be used to ad position in solid lines and in inactive position in justably but ?rmly attach the members l3 to dot-and-dash lines, and also illustrating several the bar ii and the clamps ll to the members l3; typical bar bumper sections; and and by disposing the slots l2 and the openings Hi Fig. 5 is a similarly enlarged fragmentary View of one of the adjustable clamps for rigidly at 10 in rectilinear alined series, any of the openings 14 may be brought into open alinement with selected taching the hitch to a bumper bracket which is slots 12 or" the adjacent series, thereby providing shown in section. great ranges of outward straight line adjustment While our invention has been shown hereinas forthe members l3 relative to the central bracket being especially adapted for-use on streamlined iii. By disposing the openings E5 in the flat end automobiles of various models and makes and in portions ‘it of the members E3 in arcuate series conjunction with ball and socket type trailer cou disposedrinarcs having as centers the extreme plings such as disclosed in our coependingappli end openings 58 or the adjacent rectilinear series, cation Serial No. 564,036, ?led November 18, 1944, any desired degree of swinging adjustment is now Patent No, 2,392,063, Jan. 1, 1946, it is not our readily obtainable for the clamping brackets ll, desire or intent to unnecessarily restrict the scope so that these bracketsvmay thus be caused to co or utility of-the-improved features by virtue of act with bumper braces 'l'of various shapes and this limited- - disclosure, spaced apart various distances, as near to the Referring to the drawing, the improved trailer main frame of the vehicle as possible. hitch assembly shown therein is especially adapted The carriage bolts l8 may obviouslybe readily 'to be conveniently attached to the rear bumper applied to any-of the slots 12 and openings l4, l5 brackets-‘l of an automo‘bile'or'the like on voppo and are provided with ordinary clamping nuts 25 site sides of the central longitudinal plane of ‘the and lock washers 425 as shown in Fig. 5; and the vehicle as near to the vehicle frames as possible, square or otherwise polygonal portions of such and-forwardly or the rear bumper bar 8 and beneath therear spIash‘plate-VS; The bumper 30 bolts located near the heads thereof, will prevent turning of the bolts 58 within the similarly- polyg brackets l and bumper bars '3 may-assume ‘various onal' openings ‘[4, 15 of 'the members l3, thus ‘shapes and sizes depending upon-the model or permitting manipulation of the nuts ‘25 from be type of car, and the vehicle frame and the neath. The swingably- adjustable draft bar or brackets-l are normally concealed'from view at plate is is preferably-bent ‘as shown in Fig. 4»,~in the'top“ and'si-des by the splash plates 9, the order to clearthe lower edge of the rear bumper fenders and the bodiesof the‘ automobiles. bar v8 when the hitch is in use, and the pivoted Our improved ‘hitch assemblage comprises in end of the’ plate 19 is looped'aroun-d the pivot pin general acentral U-sha-pedbracket it having a 2% and may ‘be welded so asl-to prevent spreading rigid channel shaped bar l l secured to-its front portion, said ‘bar'beingprcvided\with- a series of 40 of the loop.. The coupling ball member 2! may ' alin-ed slots- iE oneach side of the central plane of the bracket; an elongatedcha-nnel ‘shaped member l3—'slidabl-y adjustable along each slotted side portion of the rigid cross-‘bar 'I I, each mem berl3~having a rectilinear series of polygonal openings l-ll "therein ‘which are 'alineable "with the slots E2 of the ‘bar 1 l, and also having ‘an-arou ate'series of similar openings [5 at-the outer widened and flat extremity l3 thereof‘; a-U eshaped also -be‘-f-orn1ed of sheet metal as disclosed in our prior application ihereinbeforereferredlto, and is provided with-an-attaching boltil'land with a nut-1'28-and lockwasher 29 coacting with thebolt 23":to firmly secure themember -2l to the swinging end of- the bar 1-9. Theclamps-‘Q‘S and thebolt 22' which coact with the opposite resilient side ?anges or walls .of the central bracket ill, are adapted to clamp these walls against the opposite ' clamp i'lv disposed beneath the’ flattened outer sides of the end loop of the» plat-ell} so as to extremity-of ‘each adjusting mem‘beri 3 ;v carriage bolts i 8- coo-perablewi-ththe slots i2; openings l 4, ’ bl-e,position-asshown-insolid lines/in Fig. 5, or in ?rmly hold the-latter‘in either active and accessi draw‘ ba-r or-pla-te l9~~swingably suspendedirom inactive ‘and concealed.- position-‘as illustrated in .dot-and-dash lines. In order to assist in thus holding the draw bar 19 in position,- the clamps the “opposite resilient side walls of the ‘central ‘bracket ld'by meanscf a pivot pin-2d and having side walls of the bracket» 10,- andlthebolt 22 is l5 and with openings in thefl'anges of the clamps i'l'to hold the parts inassembled‘condition; a 7 its ~ swinging end forme d- for detach-able '- applica ' tic-n era-coupling ‘ball member 2%; and aclamp 23lareprovided with lugs?! which penetrate the embraced by coil/springs 32 which 1pull the lugs LE-l ;out of the pathof swing of the bar plate‘!!! when they-nut -30-1lis-released.- ‘The-bolt ZZVmay ingbolt=22 and clamps 23 coacting-withthe main 60 be providedlwithlanordinarynut 3l~J--for clamping bracket id and with the draft plate lEl-to'?-rmly purposes, butneed not beprovided with a'lock ~ retain the latter-either inactive‘ or‘inactive posi washer since the-resiliency‘ of the side ‘walls of tion. the bracket “Lander- the-sheet metal clamps 23 The bracket wand the cross-bar li-may be formed-of sheet metal with'theiaid'of punches 65 and springsS-Z make the use of‘such washers unnecessary. 1 andd-iesandrlmay be ?rmlyunitedby welding or Duringcnormal use ofithe'improved trailer cou other-wise,- or they may be- produced‘from a single pling hitch, theadjustable channel shaped mem piece of metal. The channel shape of the bar ll bers‘ I13 may be'slidalong the laterallyproject provides extremely rigid attaching arms project "ing-"arms-ofthe cross-bar"! l tO-any'dBsired posi ing-“laterally away from the ‘bracket-I ii, and these tion'fso that the ‘ U_-shaped~ clamps ‘I l " which are arms-may be provided with lower- loops 24 which serve as pointsof attachment for safety cables or initially loosely‘ suspended ,from the outer 'por chains required by-rla-w in some States, and which may also the-used asmani-pulating- handles. The channel shaped ‘adjusting members 13 which‘are tion'i ii of ‘the members ‘I 3; maybe caused to prop erly cooperate with the bumper supporting brack ' ets ‘i ‘of the particular vehicle to which‘ the acces~ 2,408,531? sory is to be'applied, as near‘ to the framev of the vehicle as possible.‘ The members I3 may then be ?rmly attached to the cross-bar II in the de sired positions‘of adjustment with the aid of bolts said arms, an elongated supporting member‘ slid bumper supporting'brackets 1, whereupon bolts a coupling member secured to said bracket be tween said arms, a supporting member slidably adjustable along each of said arms, and a clamp swingably adjustable upon the outer end of each of said's‘upporting members, each of said sup ably. cooperable with each of said arms and each being formed for independent adjustable attach ment to the'adjacent arm along said openings, and av clamp pivotally adjustable about a verti l8, either as shown in Fig. 1, or as shown in Fig. 3. The-U-shaped vclamps I‘! may then be swingably Oi cal pivot relative-to the outer end of each of adjusted about the end. openings 18 of .th'e‘adja said supporting Emembers. . . 'zi3.‘In" a trailer'hitch,.a bracket having‘rigid cent rectilinear series, and caus'edfto properly arms extending from the, opposite sides thereof, cooperate with the adjacent portions of the 18 maybe applied to the‘ pivot openings l4 and to'the nearest opening l5 of the adjacent arcuate series, so as to ?rmly clamp the members“ 13 to thebrackets 1 as illustrated in Fig. 5. ‘ The ' porting members having therein a rectilinear .set assemblage will then be ?rmly attached to the vehicle, and the draft plate. l9 may thereafter 15 of bolt holes and anarcuate series of similar holes for effecting locking of said member to the be ‘swung either'into active or into inactive posi adjacent arm and locking of said clamps to the tion at the will of the operator, and locked in adjacent supporting members. either of these positions with the aid of the 4. In a. trailer hitch, a bracket having opposite clamping bolt 22, in an obvious manner. It will thus be'noted that the improved attachment may 20 side walls and channel shaped arms extending outwardly therefrom, a channel shaped support be readily applied to vehicles of diverse models ing member slidably adjustable along eachv of and styles-and that the coupling ball member said arms, a U-shaped clamp suspended from 2| which is carried by the outer swinging end of the outer end of each of said supporting members, the draft bar or plate l9imay be conveniently dis a draw bar swingably suspended from said bracket posed either in accessible or in concealed position. between said side walls, and a coupling member The auxiliary loops “which are rigidly attached secured to the swinging end of said draw bar. to the cross-bar H may be used when necessary, 5. In a trailer hitch, a bracket having opposite for purposes of attaching safety cables or chains, side walls and channel shaped arms extending thus making the appliance extremely ?exible 30 outwardly therefrom, a channel shaped support in use and in its adaptations. ing member slidably adjustable along each of From the foregoing detailed description it Will said arms, a U-shaped clamp suspended from the ' be apparent that our present invention provides outer end of each of said supporting members, a an improved trailer hitch which besides being draw bar swingably suspended from said bracket extremely simple and compact in construction, is highly ?exible in its adaptations, and is also 35 between said side Walls, a coupling member. se cured to the swinging end of said draw bar, and highly efficient in normal use. Since all of the means coacting with said walls to clamp said major parts of the assemblage may be readily draw bar so as to retain said coupling member formed from sheet metal with the aid of presses, in either active or inactive position. punches and dies, the manufacturing cost of 6. In a trailer hitch, a bracket having spaced the assemblage is reduced to a minimum, while 40 a sturdy and durable assemblage results. The use of standard bolts besides reducing the initial cost also makes replacement of lost bolts readily possible, and it has been found that the improved accessory can be readily applied to various types of automobiles without marring these structures or diminishing the aesthetic appearance thereof. The improved trailer hitch has proven highly suc side walls and channel shaped rigid arms ex tending laterally therefrom, a channel shaped elongated supporting member slidably adjustable in a straight line along eachof said arms, a U shaped bumper bracket clamp swingably adjust ably suspended beneath the outer end of each of said supporting members, means for locking said members to said arms and said clamps to said members in various positions of relative adjust ment, and a draw bar swingably suspended from said bracket between said walls. 7. In a trailer hitch, a bracket having spaced side walls and channel shaped rigid arms extend ing laterally therefrom, a channel shaped elon cessful in actual use and the provision of the rectilinear and arcuate series of adjusting open ings [4, I5 has been found extremely useful in facilitating attachment of the accessory to dif ferent types of vehicles. It should be understood that it is not desired 55 gated supporting member slidably adjustable in to limit this invention to the exact details of a straight line along each of said arms, a U construction, or to the precise mode of use, here shapedbumper bracket clamp swingably adjust in shown and described, for various modi?cations ably suspended beneath the outer end of each within the scope of the appended claims may oc of said supporting members, means for locking cur to persons skilled in the art. 60 said members to said arms and said clamps to We claim: _ said members in various positions of relative ad 1. In a trailer hitch, a bracket having ?xed justment, a draw bar swingably suspended from laterally spaced side walls and rigid arms extend said bracket between said walls, and means co ing outwardly away from said walls, a coupling 7 acting with said side walls to retain said draw bar member swingably suspended from said bracket in various positions of adjustment about its sus between said walls, supporting members for said bracket secured to said arms and being inde pendently slidably adjustable therealong, and a clamp swingably adjustable about a vertical pivot pension pivot. 8. In a trailer hitch, a bracket having opposite side walls and rigid arms extending outwardly therefrom, an independent supporting member relative to the outer end portion of each of said slidably adjustable along each of said arms, a U supporting members. ' , shaped clamp suspended from the outer end of 2. In a trailer hitch, a brackethaving later each of said supporting members, a draw bar ally extending integral arms each provided with swingably suspended from said bracket between a rectilinear series of elongated openings, a cou said side walls, and a coupling member secured pling member secured to said bracket between 75 to the swinging end of said draw bar. 2,408,531. 8 toward. and awayifrom‘ said coupling ‘member, 9.- In a. trailer hitch,a bracket having opposite sidewalls and rigid arms, extending outwardly therefrom, an independent supportingmember sli‘dably adjustable along each of said-arms, a U shaped clamp suspended fromcthe outer end of and: an attaching :clamp for the ,hitch swingably adjustable about-a. vertical pivot relative to the outer, end‘ portion of .each of said supporting members. each of said supporting members, a, draw bar swingably suspended from. said bracket between 12,111 a trailer hitch,_ a bracket having oppo site, side walls andichannel shaped arms, extend ingioutwardly therefrom, a channel shaped sup said side walls, a coupling member, securedzto the porting member slidablyadiustable along each swinging end of said draw bar, and means co acting with said walls to clamp saidrdraw bar 10 of said arms, a. clamp suspended, from the outer end of eachoisaidsupporting members, a draw so as to retain, said coupling member in. either ac bar?swingably suspended from said bracket be. tive exposed or inactive concealed position. tween said side walls, and a coupling member se 10. In‘ a trailer hitch. a bracket ‘having, rigid curedlto .the swingingvend of said draw bar.v arms extending from the opposite sides‘ thereof, 13. .In a trailer hitch, a bracket having oppo a coupling member secured to said bracket‘be 15 site side walls and channel shaped arms extend tween said arms, a supporting member horizon lngoutwardly therefrom, a channel shaped sup tally slidably adjustable along each of ‘said arms porting .member slidably adjustable along each of toward and away from said coupling member, and said arms, a clamp suspended from the outer end an attaching clamp for the hitch swingably ad justable about a vertical pivot relative to the 20 of each ofsaid supporting.,members, a draw bar pivotally suspended from said bracket between outer end portion of each of said supporting saidside walls, a coupling member secured to the members. swingingend of said draw bar, and means coact 11; In a trailer hitch, a bracket having rigid ing, withv said ‘walls, for clampingsaid' draw bar arms extending from the opposite sides thereof, a in various ‘positions relative to its suspension coupling member swingably suspended from said bracket between said arms upon a horizontal transverse pivot, a supporting member horizon tally slidablyv adjustable along each of said arms 25 pivot.“ HOWARD C. RIEMANN'. JOEL R. THORP.