US1409377A - Jack - Google Patents

Description

-w. HENDHY.

lACK.

APPLICATION HLEDMAR. 3|. 1921.

1,409,377. PatentedMar.14,1922.

gnomi/EQ@ 5 y WxLLlAM HiNDRY `whichv the following is a specification.

' incastri'.

UNITED s'rxrlsV rQTENT OFFICE.

WILLIAM HENDRY, orr'TaooMA; viTAS,HnvGfToN.`

Jeux.

i f Application mea March 31,

To all whom may concern: Y- VBe it known that I, WILLIAM HENDRY,fa subject of the King` of England, anda resident ofthe city of Tacoma, county of Pierce, State of lashing-ton, haveinvented certain new and .useful Improvements vin Jacks, of

My linventionlrelatesto improvements in jacks, and more particularly to devices of that type adapted for-*jacking up lthe wheels of automobiles or similar vehicles; the'principal object of the invention being to'provide a vjack havingva itelescopically "extendable'handle which may serve, whenextende ed, as ameans-whereby the jack may be placed in position beneath the axleof a ve-l hicle or whereby it may be removed therefromfthereby obviating the necessityof one getting down ontheground as is necessary when using jacks of themost commonV types.

It is also an object of the invention -to provide a jack of the above described chai-V acter wherein the jacking shaft is raised or lowered by an up and down movement of the handle which, through the intermediacy l of a pair of selectively used clutch'dogs, ro-

'tates'aljaclr Aactuating gear.y Also to prowhereby an eflicient and serviceable device better illustration.

Y taken on'the line 3-3 in Figure l.

is provided. Y Y i v In accomplishing these-and other objects of the invention,fI haveprovided the improved details of construction, the preferred forms of which are illustrated in the accompanyingdrawings, whereinf Figure lis a side elevation of a jack embodied by the Vpresent invention; `the handle being only partlyshown, Vand in section for Figure 2 is a plan View of thej ack showinga-` the handle extended. j igure 3 1s a transverse sectional view,

Figure 4: is a transverse section taken on i the line 4 4 in Figure l.

Figure 5 is a detail sectional view, show# ingthe manner of mounting the advancing gear on the jack stand.

: i Speciiication of Letters. Pat'ent.

.Patented Mar. 14, y192e.I 1921-. serial No.' 451,244. u

fReferringl more in detail to the several views Vof the drawings whereinv like refer-- ence numerals deslgnate `the Ysame orflike` l designates a jack stand, or base,and2 al threaded jack shaft that is'mounted vertiraised or lowered therein.l :At its upper end the shaft is equipped with theusual shoe 8,

and` provided longitudinally/'with a slotl cally within the stand and isadapted to be i Y or groove 4 wherein a boss 5, formed-on the interior'of the stan`d,sextends' toprevent rotation of the shaft within'th'e .Stan-(1 l A-beveled gear wheel 6 is mounted on the threaded portion of thejaclr-shaftto-'seat rotatablyupon the upper end of thestand l to retain the shaft 2 atthedifferent positions to which it may 'be adjusted bythe roy tationjof the gear.l Another beveled gearV4 wheel y7, is rotatablymountedupon a trun-` nion 8 on the side ofthe stand, thatV operatesgin mesh with the gear 6 and servesl as a means whereby the lattergear may be rotated. Y l `f 'y A short lever Ll0 pivotally mounted' upon the outer end ofthe trunnion 8,adja

cent the gear, and pivotally mounted upon this leverare oppositely directed clutch or ratchet dogs l1 and 12 which arev adapted to be move into and 'from engagementwith square cut peripheral teeth' 13 adjacent the outer face of the gear 7 in order rthat theV j j. Y

latter-may be rotatably advancednpon op-j.. i

eration of the scribed.

The dogs "lland'lQ, which are pivotallyY supported, atp'ointszbetween their ends, and

in spaced apart relation onthe lever,'have jaws at their inner ends for engaging fthe teeth of the advancing 'gear'and have outer Y* Y endportions 11 and '12 between which a) coiled spring 14 is placed, to normally urge i and yieldingly retain the clutch 'ends in engagement with the gear. .l f

jack handle, as presently de it is being lowered,` that the dog 12be disl engaged', I have providedmeans whereby the dogs/may be positionedV or controlled W i easlly by certain manipulation-of the handle.

v"The handle l5, which embodies la-'part of the present invention, comprises a plurality of telescopicallyconnected tubular sectionsY l5', all of which, except the outer section,

are equipped with longitudinally extending 10()A Since itv is necessary,1when thefjack is be'- e' ing raised, that the clutch dog 1l befretained disengaged'from thegear, and when slots 16 wherein studs 17, fixed on the inner ends of the sections, are extended to prevent rotation of the sections relative to each other.

The inner end section of the handle is secured within the outer end of a sleeve 2O i".

The inner eiid of the sleeve has an eX tended portion-25 at one side thereof which,

upon rotation of the sleeve to its oppositel limits as provided for by the slot 23, will engage .the inner end portionv of one or theY vother lof the clutch dogsto retain the jaw end of the engaged dog from engagement with the gear 7 while the other dog is yieldingly retained in engagement therewith by means of the spring'lll. f

.The handle,. when extended to its full length, may be locked against telescoping,

by turning the sections thereof in such manner. as to move the studs 19 into offset seats orsoclrets 30 which are formed at the outer ends. ofthe slots 16. Assuming that the various parts of the jack are so constructedand assembled, to use the jack for the purpose ofl raising a` vehicle wheel from the ground, the operator first places the inner end of the inner handle section 15 within the outer endyof the sleeve 20 and secures it therein by 'tightening the set screw 21.V He then draws out the handlefsections to their full length where they are locked by turning the same to. position the studs 17 within Vthe* sockets Vor seats 30. Therliandl'e then may beused asa means for pushing the jack beneathgthe axle lo fthe vehicle and thus ,the necessity of the-user getting down on the ground or beneath thefvehicle is avoided.- The handle then is rotated before or after the'jack is placed to cause theextension 25 onthe sleeve to engage the dog 11 to retain it disengaged from the gear while the dog 12 is left free. .f Y

To raise the vehicle, the handle 15 of the jack is moved up and down, permitting the dog 12, on downward movement of thev handle to rotatably advance the gear 7', and

vthis in turn rotates the. gear 6 in the direction required to raise the shaft 2 against the vehicle axle. A

To lower the jack, the handle is then rotated in such manner that the sleeve eXtension 25is caused to release the dog 11, and to engage the dog 12 to raise it fromy functional engagement with the gear 7. `Upon operation of the handle then, as before, causes the gears to be rotated in a reverse direction and the jack shaft to thereby be lowered. The jack may, when'lowered, be

andv clutch mechanism could be employed likewise as shown on various othertypes of vehicle jacks without departinggifrom the spirit of the invention, and for this reason I donot wish to be limited to the details of construction shown. i

Havingy thus described my 1. In a lifting ,j aclgy thencombination with invention, what l cla-im as new therein'and desire to Vsecur by Letters-Patent, is: i

a base member, a jackingshaft mounted i'n said base and a toothedv Wheel mounted on said base koperatively connected with said shaft and rotatablefin vopposite directions to adjust thesaid rjacking shaft, kof al lever pivotally mounted coaxially with and'y adjacent the said wheel, a pair ofi oppositely-L extended ratchet dogs pivotally mounted on said leverfor advancing the said' wheell ini opposite directions by actuation ofthe lever,

ansleeve rotatably mounted on the lever, an,-`

extension atthe inner end ofthe sleeve en.- gageal'ile individually withsaiddogs on rotation of the sleeve toiretain the engaged dOgf-rom operativejengagement with the advancingwheel anda handle removably mounted in saidsleeve whereby said lever# f may be operated and-said sleeve rotated.

2. ln a lifting jack, thecombinatioii-with a base member, a jacking shaft -mountedin said base, and a toothed Wheel mounted onr the base and' operativelyconnected with` said shaft andyrotatable iny opposite direc-v tions to adjust the said acking shaft, of4 a lever pivotally mounted at one endcoaxially'.

with and-'adjacent the saidiwheel, apair of ratchet. dogs pivotally mountedon said lever',

a y'ieldable means fOr-1 normally .retaining said dogs engaged withsaid--wheel teeth, a sleeve rotatable about and fixed on the outer endl of the lever, having aiievteiisioiiy at its inner end individually engageable withthe Y dogs onV rotation of the sleeve to retain the one engaged from operative vengagement with the' adgusting wheel, yand a telescopically exteiidible handle removably mounted.,`

within said sleeve as an extension of the Tlever, whereby said lever maybe operated and said sleeve rotated.

Signed at Seattle, lVashingtomthis 25th

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