US1554120A - Jack - Google Patents

Description

Sept. is, 1925. 1,554,120

I. S. MOSHER JACK Filed Decv 18, 1920 4 Sheets-Sheet 1 55 17M ,5. Moan: v INVENTOR ATTORN EY Sept. 15, 1925. 1,554,120

- l. 5. MOSHER JACK Filed Dec. 18, 1920 4 Sheets-Sheet 2 INVENTOR IRA. flaw/Eli.

Sept. 15, 1925. 1,554,120

- l. S. MOSHER JACK Filed 1 1920 4 Sheets-Sheet 3 4 1 1 I p I T i lulu/IIQII.

[NV EN? OH H ATTORNEY fla 8 a v J V m v z n i f f a H/H If? ,5. Mas/wit.

L MQSHER JACK 4 sheet 4 Filed Dec. 18.

NV TOR AITORNEY Patented Sept. 15, 1925.

UNITED STATES IRA s. MOSHER, or oIIIcAeo, ILLINOIS,

PATENT OFFICE.

'ASSIGNOR TO MOSHER MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A COPAR'INERSHIP COMPOSED .OF FREDERICK T.

BARRETT AND IRA S. MO'SHER.

JACK.

To all whom it may concern. r 7

Be it known that I, IRAS. MosI-IER, a citizen of the United States, residin at Chicatransported, and a jack which is go, in the county of Cook and tate of Illinois, have invented new and useful Improvements in Jacks, of which the following is a specification.

This invention relates to lifting jacks, and an object of the invention is to provide a lifting jack of comparatively great lifting power which may be assembled in a compact form to permit it to be conveniently particularly designed for use by motorists.

Another object of the invention is to provide, a jack structure embodying a supporting member which is movable independently of andre'lative to its raisingmeans to per mit quick adjustment of the supporting means to engage the article to be raised, and also to provide'means for holding the supporting means in adjusted position relative to its raising means, i the latter means remaining in its lowermost normal position during independent adjustment of the support.

A further, object of the invention is to provide a lifting jack structure wherein interengaging ribs are provided on the supporting member and its raising means to prevent transmission of tilting strain to the raising means and consequently permitting of the free operation of the raising means.

Other objects of the invent-ion willappear in the following detailed description and accompanying drawings wherein:

Fig. 1 is a side elevation of the improved lifting jack.

Fig. 2 is a side elevation of the lifting jack having parts broken away to illustrate the gearing for operating the lifting means.

Fig. 3 is a vertical section lifting ack.

Fig. 4 is a horizontal section through the lifting jack, takenfon line 4-4 of Fig. 3.

Fig. 5 is. aneolged elevation of the lifting jack. 1

Fig. 6 is a side elevation of the raising member.

Fig. 7 is a detailed sectional view through :the gear operating mechanism.

Fig. 8 is aside elevation of a handle used in the pe atin mec nism.

through the Fig. 9 is a crosssection through the handle taken on line 9-9 of Fig. 8.

Fig.10 is; a face view of the pawl employed for holding the supporting'm'ember in adjusted positions relative to its raism means. V

-Fig. 11 is a longitudinal section through the pawl taken on line1111 of Fig. 10.

Fig. 12 is a detailed edge elevation of the supporting member.

Figl 13 is a fragmentary section through the supporting member illustrating the manner of nesting the operating handle therein and the means. for holding the handle against accidental movement. Fig. 14 is an edge elevation of the raising member.

Referring more particulary to the drawing, the improved lifting jack comprises a main supporting body 1 which is provided with a vertical longitudinal extending openh1g2 that receivestherein the raising sleeve 3. The raising sleeve 3 is substantially rectangular in shapein cross section and has its outer side split longitudinally, through which the connecting portion 4 of the supporting member 5 extends. The connecting portion 4 has itsinner edge connected to a substantially rectangular sleeve 6 which is slidably mountedwithin the sleeveB while its outer edge is connected to the extension 7 which provides the shelf 8 upon which the article to be raised rests. This connecting portion 4 is inthe form of a web, and is shorter than the rectangular body 6. The extension 7 is provided with a transversely extending opening 9 in which a pin 10 is mounted. The pin 10 rockably supports the pawl 11, the saidpawlbeing relatively wide and provided witha cutout portion 12to receive the extensionlltherein; The lower end of the pawl 11 curves inwardly towardsthe axis of thesleeves 3 and'6 and has its inner lower edge rounded as shown: at 13 for engagement in any aligning pair of notches 14 formed between the teeth 15 of the rack structures 16. The rack structures 16 are formed upon the raising sleeve 8 and. are spaced, as clearly shown in Fig. 14 of the drawings, to permit the unimpeded passage of the connecting portion 4 therebetween. The sleeve 6 and consequently the supporting member, of which thissleeve is a part,-

are li ly a a e relative to t e a n sleeve 3, sons to'pcrmit the siipportingniemo her to be raised or lowered independently of the operation of the raising sleeve 3 to per; "mit-properje'ngagement of the shelf 8 against operation of the raising sleeve 3. During the relative movement of the supporting member of which the connecting portion' l is a p 'p llism aupon its r ve 10 10 out of the aligning pair of notches 14,

U and after the supportingv member has,- been properly adjusted"'so, that the shelf 8 will engage beneath the article to be raised the pawl 11 is swung inwardly so that it will 15 engage in the1properly aligning;notcliesf14 and the pawl 11 will connect the supporting member 5 and theraising sleeve 3 forsynchronous movement. p h

The aisin l e e 8ciisar d wi gear rack 17 extending longitudinallyalong the-side opposite to the racks 16 :as clearly shown in Fig. 6 ofthe drawings. The teeth a 18 of the-rack 17 mesh with the peripheral teethj19-of the gear-20. The gear 2 0has a trunnion :2l for me.d integrally therewith a :which rotatablyengages in-a suitablebearing 22 formedin the housing lxof vthe jack. structure, as clearly shown. inFig. A of the drawing, The gear-20has a bearing sleeve 23 formed; integrally gtherewith which is vslightly.larger in ili'anleter than the gear 20 and which snugly-fits within the bearing 24.

formed inthe housing 1. The worm gear pof greater diameter, than'the gear 20, 1s formedintegrally upon the outer endflof the sleeve 23. Aaworin .26isniounted uponthe sha ear b il f Ices? a 1 d me h s .o w t the W m B bear n s J are carried by the worm 26 to absorb under 4o thrust, of the worm 26 consequently relievethe friction.whiqhinight be occasioned during, the IQtQlJIOH Q f the worm. The worm gear25 and worm 2 6 are encl e d in. a suitb e a s em dial-i o edy removable ciisingsccfion 30, loy means of .whiclraccess-tb the -gears is obtained when,

n ess y V 1: 1

, The shaft'f2 7 has aiiratc lhet -31 keyed thereon about which a housing 52 is mounted, the latter housingbeingrotatable upon the shaft 27, and. provided with aQpair. of rotating @1118 sam peiaaiib'w ani abew Bawls: 34 .are piv- L axis of tho shaft :2 J V I l l y r ie-d, by the. amas I n n of r 5" tliese pawls is adapted; to engagejth ratchet teeth 'of the fat? hetf3 1 at'f'a time to rotate H tqiie 'y l h gi y lniovement r thejim sing i poiigth evliaft 27, 'h i gi32x i as6 tiifi'f d fh iifhlgh is aapreu to receive; i'' lend e t an e This handle 36 "constructed 1 in aiiy approved m nner, pref embiy hollow I uloiii r as shown iii Figs. ;8 Qotl1ed1awiiigsand it haste knob 37 G5 "on one'enii to acres ahana'gri p. By pivotal movement the handleliiti, which iorms a I H tates the get 11 20 through the worm 2 6 and 6 the article toberaisedwithoutnecessitating lO andrspringfll may be provided, the set screw being carried by the connectingportion 4 and having one end of the springconnectedthereto while :the other end of the spring is connected tothe pawljll, for ma ntaining the pawl 11 in one out the notches 14:, against accidental movement.

The sleeve 6 is provldd w th longitudi nally extending axial recess 44 which proyides a pocket for receiving the' handle 36,

when lthe'latter member is not innlse, to provide a compact- -structure for theljack which maybe stored in-a relatively small space A set screw 45 v is carried by the sleeve 6 andis adapted for biting engage- I ment with" the handle 36 to hold-it against accidental movement relative' to th'esleeve 6' when thehandleis nested in t'hejpocketfl l. a The body 1 is provided; with; vertical ribs 46 which engage in recesses 4?, which are formed in the raising sleeve 3. The recesses' 4'7 form ribs 48 which interengage with the ribs 46, to -,prevcnt the, transmission of. tilting movement or strain, to the gear rack 3 17 and consequently to the gear 20 .which would increase the work and "decrease ease of OPGIELUOII of theqaclrstructure If it is so desired, a hand crank 50. may be mounted upon the shaft, ,to permit manual rotation of this shaft: and operation of the raisingsleeve3, This hand crank 50 isparticularly adapted for use when only light weights are to be lifted and it will also serve ad'mirably; in lowering the sleeve 3 into its normalposition From the foregoing description taken in connection with the accompanyingdrawings it will be apparent that the supporting member 5 may be raised or lowered relative to the raising sleeve 3 to permit the shelf 8 to properly engage the article to be raised-and also that the raising sleeve 3 will remain in its lowermost position during such adjustment, thus permitting effective .Workinghse ofthe entire lifting-or raising of lthevraising sleeve 3 and eliminating the tediousoperation of raising the support throiighxoperation of the gear 20, to cause it to }pro'perly engagethetarticle to be raised; V

The forming of the gear 20, trunnion 21,

hearing sleeve 24 and wormgear 25 integral,

provides a relatively strong structurehaving a minimum bearing surface which will maother manners and the parts associated in different relations and, therefore, Iv do not desire to be limited in any manner except as set forth in the claims hereunto appended.

Having thus described my invention what I claim is:

1. A jack comprising a body provided with a vertical opening, a sleeve slidably mounted in the opening and having a tongue and groove connection with the body, a sec ond sleeve slidably mounted within the first sleeve, a shelf extending from the second sleeve, and adjustable connection between said shelf and the first sleeve, and means for raising the first sleeve.

2. A jack comprising a body provided with a vertical opening, a sleeve slidable in said opening, a second sleeve slidably mounted within said first named sleeve, a transverse shelf on said second sleeve, an ad uStable connection between sald shelf and said first named sleeve, and means for raising said first named sleeve;

3. A jack comprising a body provided

Images