US1899131A - Automobile jack - Google Patents

Description

Feb. 28, 1933. w. BEDAlD ET AL 1,899,131.

AUTOMOBILE JACK Filed April 5, 1930 Patented Feb. 28, 1

wrrmnrn BEnARn Nn JOHN FRANKLIN QLOCKHA RT, or SE KIBKQMANITOBA, CANADA AUTOMOBILE J'Acx Application a1eanpri'15,'1e30,,sena1no. 441 ,995,'and in'canadaNovember 1a, 1929.; i

The invention relates to improvements in automobile jacks and anobject ofthe inventionisto provide a jackwhich can be fastened to a motor vehicle as part of the per-' "HlitIlGlli} equipment thereof and which can be readily manipulated to pass into contact with the ground, it being contemplated to-equlp the vehiclewith four of'such jacks, one p0 sitioned adjacent each "wheel so that any 10, Wheel can .be easily'and'quickly raised when punctured or otherwise damaged and w th out having to place the jack under the e-, hicle as is usual at the present time; v

A-further object is to construotthe ack so that it can be firmly secured to either the front or back axle without;requiring any changeinthe vehicle structure andsuch also that when the jack is not in use,-the'work1 ng parts will be all eflectively'enclosed to maintain them free of dust,;di'rt,and weather. A further object'of the invention isto con struct the foot of the jack so that it canreadi-ly adjust itselffto theground whenzit engages the same and such'that as the ack is extended, the jack screws are housed. V A further object is to construct the Jack so that the lifting thrust will be "amply taken up in ball bearings provided, such latter also insuring of the easy working of the jack,

'A further object'is to construct the various parts in a simple, durable and inexpensivemanner and so that the same'canall be readily manufactured and assembled and also taken apartfor inspection or repair orother purposes. I 5 V 7 With the above imoreimportantobpcts in view, the invention consists essentially in the arrangementand construction of parts here o ina fter more particularly described, reference being; had tothe accompanying drawing, in which: 1 Y

Fig., l is a perspective .View showing one of the jacks as used'for raisingone of the front Wheels of a Vehicle from: the ground; e Fig. 2 is an enlarged detailed vertical sectional view centrallyjthroughthe'jack, the

section being taken at*2;2 Figure3p r Fig. 3 is a horizontal sectional view-at 3+3 Fig re 2. r I

the-upper end 0 opening 7 andfthe sectionalview -at4-4 Figure 2,

i Fig. 4 is, anlenlarged detailed horizontal "Fig. 5 is a perspective View of the brackets usedon the jackas shown in'Figure 1.

Fig. 6 is a perspectiveview' showing the jack as used on the rear axle for raising one. of the rear wheels. i

Fig.7 is a perspective of the lower end of-thejack screw;

Fig. 7 8 is a vertical sectional view I the "intermediate screw threadedsleeve." v i In the drawing like charactersof reference indicate corresponding parts in the several figures; 1 Y I As hereinbefore stated, We purposetouse a aset of four jacks .on each ;motorevhicle,

one adjacent each wheel sothat'anyor all wheels can be raised clear of-the ground whendesiredfi The'jacks off the set are all similarly" constructed with the exception that the attaching means through? v utilized for the front jacks is somewhat different from that used for a the rear jacks. V f The front jacks are fastened permanently to the front axle in a location to the outer sides is ampleclearance spaceabove the jacks, such being apparent from an inspection jof, Fig;v

an outstanding flange 3 overlyingthe upper end of the casing. The casing is provided at the rear side with a .verticalguidewayor e channel 4 utilized for a purpose later disclosed andat the upper endwitha horizontal lying of the customary front springs so thatjthere i integrally'oast'sleeve 5 which has the inner side opening to the interior ofthe' casing, the front end closed by "a screw plug 6 and the rear end provided with a' -bearing opening 7. p 'A' driving shaft 8 is rotatably mounted in the plug j6 through which ,it passes and has the rear'en d passingfrotatably,through the shaftis supplied with a worm 9, which'has the. threads thereof en-= teringthe upper end of the casing 1 through 7 the side opening provided in the sleeve. A square head is permanently fastened to the front end of the shaft and'the rear end is provided with a washer 11, the washer being'retained by enlarging the end of the shaft. One can obviously turn the worm by applying the well known type of socket wrench on the square head 10.

The lower end of the casing 1 is provided with opposing upper and lower outstanding brackets 12 and 13, the lower bracket being I provided with a pair of eyes 14 and 15 and the upper bracket with a cross channel 16. The casing of the front jack is fastened to themotor vehicle by passing the bracket 13 under the top flange of the front axle 17 of the vehicle and the bracket '12 over the top leaf of the front spring 18 of the vehicleand then fastening the parts together by employing the customary front fastening spring Ubolt 19, the bolt having theupperpart thereof resting in the channel 16 and the ends thereof passing first through the; axle and then through the eyes 14 and 15, ,thefastening beingcomplete when the nuts 19 are tightened up.

- is turned, the jack screw is rotated. The ad- -jacent faces of the worm wheel and the cap 2 By so attaching the jack to the front axle we do'not require to make any change in the existing vehicle structure and we also position the jack so that there is ample clearance space thereabove. t 1

. The cap 2 receives and supports rotatably the upper'end screw extending downwardly. and centrally within the casing and having its lower end stopping short of the lower endof the casing. The upper end of the jack screw is contracted and receives a washer 21 and is enlarged to retainthe washer and the lower end of the jack screw has a stop pin or obstruction. 20' dispose pl) between the threads thereof (see Fig ure V .Directly underneath the cap 2, the jack screwis provided with a squared shank 22 which receives a worm wheel 23, the worm wheel being housed within the upper end of the casing andcontinuously in meshwith the worm 9 with the resultthat when thesaid worm are providedwith raceways to receive ball bearings24 so that thelifting thrust of the jack is distributed through the ball bearings.

Onthe jack screw 20, we mount an inner interiorly and exteriorly screw threaded sleeve 25 and the sleeve 25 carries an interiorly and exteriorly screw threaded intermediate sleeve 26 and the sleeve 26 carries an interiorly screw threaded outer sleeve27, the externaldiameter of the sleeve 27 being considerably less than the internal diameter of the casing 1. The lower end of the outer sleeve 27 is closed by; a permanent plug28 which is pro vided centrally with an extending eye 29 and the eye is connectedby a pivot pin'3O to opof a jack screw20,.the jack posing lugs 31 provided on the foot piece 32.

guard or skirt 40 which is provided at the "rear side with a vertically extending channel shaped rib 41 which rib slidably receives the rib, 38 and .is slidably received within the channel .4. ofithe casing. The vertical channels. formed by the ribs are closed at their lowerendsby inturned stops 42 and the lower endv of the channel4 is closed by a similar intu'rned stop-43. The skirts are provided adjoining theirupper ends with similar lugs 44 and 45 and the lugs 34 and 45are adapted to engage witlrthe stops 42 and the lug 44 with the stop 43. v

By the arrangement of lugs and guide channels provided, the outer sleeve 27 and the skirts are prevented from rotary movement when the jack is operated although they are free to move up anddown.

It will be observed that the external'thneads of the inner. and intermediate sleeves extend from the top to the bottom ends thereof and that the internal threadsof the inner, intermediate and outer-sleeves only extend a short distance down from the upper ends of such sleeves, the remaining underlying portions of the sleeves being smooth faced, this. latter construction being best shown in Figure 8. According to'the above arrangement, it will be apparent that when the inner sleeve has been screweddown until the interior threads thereof strike the obstruction or pin 20 of the jack screw, it will be stopped from fur thcr downward turning movement.

The same arrangement is utilized for step ping the down turning movement of the intermediatesleeve on the inner sleeve and the outer sleeveon-the intermediate sleeve as the the foot piece into contact with the ground and thereafter upon their continued down movement, the corner of the vehicle on which the jackis applied rises to clear the vehicle Wheel from thc ground. iAs the jack extends,

the screws are at all times housed as the skirts of a motor vehicle as partof the permanent r having the upper end thereof closed and the successively extend, being here observed that as soon as the foot piece starts to move down, the sleeves are free to drop so that the i jack screw threads are fully protected at all times against dust, dirt and weather. I

In order to attach the jack to the rear axle housing 46, it is equipped at its lower end with clamping members 47 and 48 fastened together by bolts 49 and 50 and provided with a jam screw 51, theselatterparts beingsupplied on the jack instead of the brackets 12 and 13 hereinbefore mentioned. In Figure 6,

of the jack face forwardly at the front of the vehicle and rearwardly at the rearso that they can be readily gotten at with the socket wrench as will be readily understood.

What we claim as our invention is l. A lifting jack for attaching'to theaxle equipment thereof comprising an outer cylindrical casing provided with means for permav nentlyfastening it to the axle, said casing having the, upper end thereof "closed and the lower end open, a vertically extending jack screw located centrally within the casing and, having the upper end thereof rotatablysus' pended fromthe upper end of the-casing, a worm wheel secured to the upper end of the jack screw, thrust bearingsinterposed between the worm wheel andthe upper end of the casing, means manually operable from the exterior of the casing for rotating the,

worm wheel, a series of sleevesscrew threading one on the other and havmg the mner sleevescrew threaded on thejack screw and the outer sleeve anchored to the casing to prevent rotation thereof but permitting endwise movement, means limiting the down travel of the several sleeves, one in respect to the other and of the, inner sleeve in respect to the jack screw and a ground engaging v foot piece pivotally suspended from the lower end of the outer sleeve, said ground engaging end piece beingcprovi'ded with an annular.

flange adapted to engage with and close th'e lower end of the casing when the jack is'in its non-extendedposition. I I

2. A lifting j ack for attaching tothe axle of a. motor vehicle as part ofithe permanent equipment thereof comprising an outer cylindrical casing provided with means'fo'r perma nently fastening jit tothe ax1e,said casing havingthe upper end thereof closed and the lower end open, a vertically extending jack screw located centrallywithin'the casing and having the upper end thereof rotatably susexterior of the casing for rotating the worm fwheel, a series of sleeves screw threading one d on the other andhaving the inner sleeve screw threaded on the jack screw, means limitingthe down travel of the several sleeves one in respect to the other and of the inner sleeve in respect to the jack screw, inner and outer telescoping skirts normally housed within the casing and interposed betweenthe casing and the outer sleeve, said skirts being guided for vertical shifting movement, one inrespect to the other and having the inner skirt guided for vertical shifting movement in respect to d the outer sleeve and the outer skirt guided for vertical shifting movement in respectto the casing and a foot piece pivotally secured to the lower end ofthe outer sleeve and nor mally engaging and supporting the skirts A lifting jack for attaching tothe axle" of a motor vehicle as partof the permanent equipment thereof comprising an outer cyline 'drical casing provided with means for permanentlyfasteningit to the axle, said casing 3 lower end open, a vertically extending jack screw located centrally within the casing and [having .the'upper end thereof rotatably suspended from the upper end of the casing, a worm wheel secured to the upper end of the ack screw, thrust bearings interposed" be tween the worm wheel and the upper end of ,the'casing,"means manuallyoperable from the f eXteriorof the casing for rotating the worm wheel, a series of sleeves screw threading one on the other and having the inner sleeve screw threaded on the jack screw, means limiting the down travel of theseveral sleeves one in vertical shifting movement, one in respect to" the other .and having the inner skirt guided for vertical shifting'movement in respect to the outer sleeve and the outer skirt guided for vertical shifting movement in respect to the casingand a foot piece pivotally secured to the lower end of the outer sleeve and provided with an upstanding annular flange normally engaging the sleeve.

Signed at Winnepeg this 12 day of December, 1929.

JOHN FRANKLIN LOCKHART-.-

WILFRID BEDARD.

pended from the upper end of the-casing, a i I worm wheel secured to the upper 'end'of the jack screw, thrust bearings vinterposed be-* tween the worm wheel and theupper end of the casing, means manually operable from the i

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