Патент USA US2407156код для вставки
. Sept; 3,. 1946; J. ‘T. HORNE ‘ 2,407,156 ' TRAILER BRAKE Filed Aug. 17, 1944 '2 Sheets-Sheet 1 ‘ Sept.*3, “1.946- ' ‘H, HORNE ' v 2,407,156‘ TRAILER BRAKE File-d Aug. 17, 1944 2 Sheets-Sheet 2 Inventor 2,407,156 Patented Sept. 3, 1946 UNITED“ STATES PAT; ENT QFFIC s ‘ 2,407,156‘ ‘ 1 ' ‘ TRAILER BRAKE 2 John ‘TheoHorne, LaytonhUt‘ali ApplicationrAug-ust- 17, 1944, S‘erialNor 549,869'i lqGlaimv, (Cl. 188—142.) 1; v 2 I- secured thereto bygheavy screws 422 engaged- in like and ‘more particularly Ito‘ an: actuatingide'vice for-such":aabrakingsystem, 211 20 'is cut .intoycasingd I "closed by aEGIOS'lII-‘I'G plate Thisinvention'relatestocabrakefontrailersand suitable threadedftapertures in"; the ~ end-‘wall; of ' easing I i: Plate "2| :hasazcentrallydisposed‘apers Aiprimary object'of ‘this ‘invention is the-pros vision of an improved mechanism actuatedhbyrthe 5 tures 23*] therethrough; through which extends draw-‘bar :I 5.T A‘ suitable 1 dust: shield 1247' or‘ rubber momentum of a-trailer or‘similar‘vehicleI-fonxap or "similarl?exiblermaterialis secured‘about drawsv plying the brakesitoa trailerswhenritheaforward bar I5jasuby a retaining ring;-25:and<heldrto cover speed? of the towing,- vehicle is'w-decreased; plate if I 1 as; by - means». of; screws : 237i to; preclude An additional important objectris-the provision of means whereby'the brake actuating-mechanism 10 the ingress of dust OIXTO'DhEIYi foreign-matter "130717116 may be “rendered ‘temporarilyinoperativacasp for. Positioned; about‘ drawr-ban I 5vwithin: recessjl) example, when backing thetrailenbythé'stowing, interior:ofitheimechanismn ‘ ‘ ' ' ‘ L ' is la heavy; duty :compressi-on shock i spring; 21 -one vehicle. ' , t _ > end of whichiabuts-theinner face Lof—c1osure=mem.; further objeot?isll-th‘e provisior-rwff means her-:21 , the other; endloii'springa? II ‘ is seated against whereby-?theobra‘k‘e=pressure1-1mayvbe readili‘y:.'ad; 15 justed‘linrthe system‘; ' I > ‘ ‘ a :Washer 28.; of 'steel‘: or .Ythe:;like1 positioned-"won draw+bar I 5" and ‘held in; .positi‘omby; a pair‘;- of ‘ Alstill further object isl-tl'i'el provision‘ 30f:1 avhiy= lockinglsnuts129*andai'30rmounted on-ma suitably draulic" brake'l'actuati-ng‘ device-1 which r wii'liibe » threaded'porti'ontlof draw--bar..;l*’5: Thus'itrwill e?icient' in operation, and ‘ relativelytsimpléi and 20 be seen that‘ by :varying. the? positions ‘of 1311135329 and 30 thewcompression of :theaspri-ng“ '21 maybe inexpensive i-toi'install‘ and manufacture.1 ‘ sturdysand-durable in-Jconstruction, reliable and varied ‘as desired; Thezsmingr?dsmt the-com ‘ pression type .andiis normallyiinactive androffers no 4 pressure “on .the: draw-:bar ‘:I 5eto» compress; ‘the Other objects‘- will in part'be obvious and‘in‘part her-pointed ‘ out‘ hereinafter and‘l disclosedi'in: the accompanying'drawi-ngs 'wherein lthere: is shown a'ipreférred-iformlrof this linventiveiwconceptt" In'thedrawings: 25 ‘ Figure 1! is a1 perspective" view‘ showing the brake actuating mechanism of Ithis-invention"- as applied to‘ a=trai1ér~ and artowirrg» vehicle. fluid by the pistons?‘l";and:33r'when~:the‘ vehicle is ‘stationary 1‘ on level ground; Spring: 21 ~is-ralso heavy: enough? with: comparison" to spring‘ ' 52;‘so that: adjustment of "L the-tension :of spring"; 5 2 : will have no appreciable effect on: spring" 21 orz'on Figured is a sectionalwiew~taken~ longitudinally 30 draw-bar l 5' when the brakeis: in‘neutral position: Positioned on ,the “opposite :side a-of": nut .v30wisra through’ the: center of‘ the device shown imFig-ure second» steel :collar ‘32 zandiva rubber :‘ShOCk washer 1. - Figure u3'1isj~a=»perspectiveeviewtofi‘certain' con-u adaptedi to prevent possible stripping‘: of structional detail-s shown in conjunction with the wiringzdiagram fdr operation thereof, and? Figure l 4~is an enlarged ‘fragmentary sectional view ‘of certain operating parts ‘disclosed ‘in-Figure threaded.‘ portion-Q31 if," for; any reason: the lay: 2 showing the same in adi?erent position-chad! raib‘ore‘ 3‘5 "andrite'rininates ‘in/11a .zreducedtportion'iii justment. ‘ Like reference numerals refer to like parts throughout the several views of the drawings. Having reference now to the drawings, the brake actuating device of the instant invention generally indicated at 55 is comprised of a casing draulic system‘ (to >. be -' describedi'hereinafter). should become - inoperative; ' and ‘ drawébanrl 5 be forced.‘ inwardly until'the washer :st‘rikesxth'e: bOte tom ofcr‘ecess 529;‘ I The-draw-rbar: I Euzextends: into upon which are positioned and secured two spaced plunger leathers 31 and 38, the purpose of which will be described hereinafter. A reservoir 41] for hydraulic fluid is secured as by bolts 4| to the top of casing II and provided It having a depending lug 52 with bolt holes !3 45 with an inlet 42. A ?ange 43 ‘is formed on the interior wall'of the reservoir about inlet 42 in tlierethrough to which. are adapted tobe secured order to prevent the complete ?lling of the eas the towing arms is of a trailer of any desired ing with hydraulic ?uid in order to accommodate type (not shown). One end of a draw-bar I5 fluid from the hydraulic system when the pres extends outwardly from casing l l and is adapted to be secured in. any desired conventional‘ manner ‘' to a towing vehicle. Such connection may take the form of a ball and socket type joint I6 se cured to a clamp I1 adapted to be ?tted to the bumper l8 of any desired type of towing vehicle (not shown). As best shown in Figure 2 a recess ' sure therein is released in a manner to be de scribed hereinafter. Inlet 42 is interiorly threaded and is adapted to be closed as by a threaded plug 44. Intake and bY-pass ports 45 and 46 are cut through the wall of casing II between reservoir 49 and bore 35, and an outlet port 41 leads from 2,407,156 bore 35 to a tube 48 leading to any desired type of hydraulic braking mechanism associated with the wheels of the trailer. ‘ The end of bore 35 is internally threaded for a substantial distance therealong and has posi 4 3, suitable hot and cold lines 64 and 65 lead from a battery 66 to opposite terminals of thesolenoid 62 and the ?ow of current is controlled by a switch 61 located in a position to be readily acces sible to the driver of the vehicle. In practice it is preferred that lines 64 and 65 be contained in a suitable conduit 58. In Figure 3, switch 61 is shown in open position and correspondingly valve tioned therein an adjusting nut 49. A closure nut 50 passes through a gasket 5| and serves effectively to seal the end of the bore. A spring 52 is positioned within bore 35 between the inner 55 is shown in closed position. When it is desired end of adjusting nut 49 and plunger leather 38. 10 to open valve 55 switch 61 is closed and acts It will now be seen that as the speed of the tow through the solenoid and its associated plunger ing vehicle is reduced, continued forward travel 6| to move rod 59 and hence link 58 to rotate of the trailer at the same speed causes an inward valve 55 to the position shown in Figure 4. When telescopic movement of the draw-bar I5 and a it is desired to return the trailer brakes to service, corresponding movement of the plunger at its ex lo switch 61 is opened and the current energizing tremity 36 and that such plunger acting on the the solenoid accordingly cut-o? whereupon the ?uid in the brake system compresses the same to valve 55 is returned to closed position in any de act in a known manner to apply the brakes of sired manner as by a compression spring within the trailer. When the trailer has been slowed to casing 62 acting on plunger 6| . ‘a degree commensurate with the speed of the ‘ Now from the foregoing it will be seen that towing vehicle it will be readily apparent that there is herein provided a trailer brake actuating the load is again taken up by the draw-bar l5 and mechanism which accomplishes all the objects of cushioned by spring 21. It will also be seen that this invention and others including many ad the compression of sensitivity spring 52 may be vantages of great practical utility and commercial readily adjusted by rotation of adjusting nut 49 > importance. ' after removal of closure nut 50 and that due to As many embodiments may be made of this such adjustment the pressure required to operate inventive concept and as many modi?cations may the braking systemmay be varied at will. be made in the embodiment hereinbefore de Under certain conditions as, for example, when scribed and shown in the accompanying draw backing the trailer by means of the towing ve I"; l) ings, it is to be understood that all matter here hicle it is desirable that inward telescopic move in is to be interpreted merely as illustrative and ment of the draw-bar l5 and its corresponding not in a limiting sense. plunger should not actuate the brakes of the I claim: trailer. Accordingly, means are provided to re A combined trailer hitch and brake actuating lease the pressure in the hydraulic system under ‘ mechanism which includes a casing adapted to such conditions at the will of the operator. Such be attached to the towing arms of a trailer ve means take the form of a valve 55 comprised of a hicle, said casing having an axial bore opening turning plug having a slot 56 therethrough adjacent one end into an enlarged chamber, a mounted for rotation in a port 51 between reser plug closing the end of the bore opposite that voir 40 and bore 35 and positioned at a point 40 opening into the chamber to form a ?uid tight beyond the maximum path of travel of the joint, a draw bar, one end of the draw bar being plunger. Obviously, when the valve is turned to adapted to be attached to a towing vehicle, the open position, that is, with aperture 56 aligned opposite end of said draw bar telescopically en with port 51, compression of the ?uid within the tering the bore in the casing, means yieldingly brake system by plunger 38 is impossible as ?uid connecting the draw bar to the casing, so that is permitted to escape through the port back into when pull is exerted on the draw bar the casing the reservoir 40 which, as previously pointed out, will be moved, non-compressible ?uid Within the is nevercompletely full in order to allow for such bore between the end of the draw bar and the escape of ?uid from the system when necessary. plug, a pipe connecting the bore in the casing One end of the turning plug 55 extends outwardly 50 with the braking system on a trailer vehicle through the side wall of casing I l and has secured whereby when the draw bar telescopes into the thereto a lever 58 to which is secured, pivotally, bore the .?uid contained therein will be forced one end'of a rod 59, the other end of which is into the braking system on the trailer vehicle to pivoted as by a pivot pin 60 to the plunger 6! set the brakes thereon and manually controlled of a conventional solenoid contained in a casing means to by-pass the ?uid and avoid building 62 secured to the side wall of casing H, a suit pressure in the trailer vehicle braking system able ?exible dust shield 63 being provided‘to pre when the trailer is being backed by the towing clude the ingress of foreign matter to the work ing parts of the solenoid. As indicated in Figure vehicle. JOHN 'I'I-IEO HORNE.