US1936984A

US1936984A - Tire changing stand

Info

Publication number: US1936984A
Application number: US658263A
Authority: US
Inventors: Listebarger James Kenneth
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-02-23
Filing date: 1933-02-23
Publication date: 1933-11-28
Anticipated expiration: 1950-11-28

Description

N 1933- J. K. LISTEBARGER 1,936,984

TIRE CHANGING STAND Filed Feb. 25, 1933 2 Sheets-Sheet l Cittomegs J. K. LISTEBARGER TIRE CHANGING STAND Nov. 28, 1933.

Filed Feb. 23, 1935 2 Sheets-Sheet 2 /6 4 "l 7 Z3 r 3 Jilz's'z'ezaiyefi Z7 3nventor EH1 MI 8 U.

(Ittornegs UNITED STATES Patented Nov. 28, 1933 TlREiCHANGINGSTAND James Kenneth Listebar g 'er,Fairfamiowa Application February 2 3, 1933. 'seria Nmtsazce I .1 Claims." (o1'. 144 2ss) The object of this invention'is to provide a stand'for carrying a wheel and tire, either in a substantially horizontal position, or in an J approximately verticalpositiom whilst the 'tire is being changed, the device being equally useful,

regardless of, whether the rim is of the drop center type, or of the straight'side'type. Another object of the invention is to provide a device of the class described, which may be placed close to a wall and can be operated to shift. the position of the work table, without rendering it necessary for the operator to pull out the stand, away from the wall, the stand always keeping a fixed position with respect. to

the wall.

A further object of the invention is to provide a device of the class described, which, although adjustable to vary the position of the work table, will, nevertheless, maintain the work table rigidly in position, whether the work table be in an approximately horizontal position, or'in an approximately vertical position.

Another object of the invention is to supply.

a novel means for adjusting the position of the work table, taking up looseness of parts, and

maintaining the work table rigid, when the work table is in an approximately vertical position.

It is within the province of the disclosure to improve generally and to enhance the utility of approximately horizontal position;

' devices of that type to which the inVentionjap pertains.

' With the above and other objects .in view, which will appear as the description proceeds, the invention resides in the combination and ar-. rangement of parts and in the details of construction hereinafter described and claimed; it

being understood that changes in the precise embodiment of the'invention'herein disclosed, may be. made within the scope of'what is claimed,

' without departing from the spirit of the invention. I I

Inthe accompanying drawings: P Fig. 1 shows in side elevation, a device "constructed'in accordancewith the invention, the

parts being brokenaw'ay. I r In' carryingout the invention, thereis provided '9. The inner arm s'or connected thereto by a piv'ot member 19.

Fig. 5 is an elevation showing-i a mc'idiiication,

a frame F, which may be constructed variouslyi' The'frame F may embody a base 1, to'which a vertical standard 2, of any'desired construction, issecuredi The standard 2 has 'a-flattened upper end 13, carrying a pivot eleinent gon which aremounted the inner'ends of supports 5,disposed-on opposite sides of theflatteneden'd 3. The outer end of the supports 5 car'ries a pivot member 6, on which a bell crank ,leverflis" fulcrumedythe bell crank lever'extendi'ng' between the supports 5." The bell. crank lever embodies an inner or short armf-8, and an outer or long arm the bell'cra-nk lever has a thinned lower end10. W

There is 'a hub iron the bell crank lever. .-,7; at the angle formed by the arms'8 and '9' of the bell crank lever. This-hub -11 has*a;proje cti-ng threaded. The nut lsiholdsa work table l5f-on V the spindle 12- inabutmentfwith the upper end' ofthe hub 11, thetable-15being" provided with openings 30, arranged as' desired, and adaptedto receive'the bolts orro'ther securing elements (not shown) wherebyIthe wheel (not shown) is secured l to the work table- The particular "arrangement of' the openings 30 is agmatter or choice, and the jmanuiacturer. can arrange the openings as --hewishes. '{The hub 11- has'another function, in

thatfits lower end engages the u'pper edge of the supports 5, tokeep the outer, arm 9 of the'bell crank zlev'er'in substantial alinement with the supportswhen the parts are 'arranged 'asshown in Fig.1; l f In the'outer end of the armD of' the beH fcra'nk lever 'Tthere isa pivotfelement 1 6, which is of considerable, length, so as; to "projectlaterally, as shown in Fig; '4. The'pivot element 16 carries the upper ends of downwardlyextended props l7.

The lower. end of theproias 1'7 is curved, and spread apart slightly,- so that; the lower endsfof the props 1'? "may span the standard 2, an d b e ,The operating memberfor'the stand is designatedJJy-the numeral20, and is aleverof the first order; f ulcrumed intermediateits ends at. 21 on the intermediate portion of the props 17;.

1 The-inner end portion of. the operating lever 20 is "designated by the numeralzz, and is pivoted U at 23 to thelowerends'of links 24,. which ex tend upwardly on opposite sides of the flattened end 10 of the short arm 8 of the bell crank.

lever '7, the

parts

24 and 10 being pivotally connected, as indicated at 25.

There are laterally extended lugs 26 on the support 5, andinto these lugs are threaded adjustable stops or abutments, such as screws 27.

The long or outer arm; 9 of the bell crank lever 7, the pivot member 7 1G, and the props '17, constitute connected elements, and with one of these Y .conneotedelem'ents, for instance the pivot member 16, 'the screws 27 are adapted to engage.

If the wheel is of the straight-side type, it is bolted to the work table 15 with the table in the horizontal position of Fig. 1, butif theiwheelis of the drop-center type, the work table is disposed in the position of Fig. 3, theposit'ion" of the table being changedby pressing down on the. outer end of the operating lever 20'. it may-be noted that at no time do any of'the parts project to the right of the standard 2 in Figs. 1 Consequently, the devioe oan be placed as closely as desired to the wall 31 and need not be moved with respect to. the wall when the parts and 2.

are shifted to and from the'positions ofFigs. i and2.- r Y When the device is arranged as shown in Fig. 1, the hubll o'n-the bell'crank lever? rests on the members 5. So far as anydownward movement of the work table 15 is concerned, the parts 5 and 9 form one rigid side of a triangle, the other two sides; of which are represented by the prop l7 and the standard 2, and the work table is rigidly supported'in theposition of Fig. 1.

inga rigid brace. Some times the

parts

22 and 24 may form anobtuse' angle, the pivot 23 moving a little to the left of the position shown, and the links 24 abutting against the lower end of the arn'i 9 orthe bell crank lever 7. a i

, table 15 is :held in the predeterznined position" of Fig. 3; in the sense that until the lever 20 is 1 moved by anoperator, the-table will not tend to drop down to the position of Fig. 1, but will remain in the position of Fig.8 while the work is being done'on the tire or wheel. Theoretically,

the work table .15 is rigidg as well as held in a predetermined position, but; in practice the,

work table is not always rigid, because there will generally be alittle play at sorne or allof the J pivots16, 6, 25, 4, 23,21, .19, due to wear or to. the inaccuracies always found in a machine not.

constructed with extreme precision. This play is not great enoughtolet down the table 15 from the. position of Fig.3 to the position of -Figl,1

but it maydetraotirom the absolute rigidity of the'table 15,;and prove, disconcerting orincon v venie'nt to t he workn ianiv The play above ren ferred to canfbe'taken' out or thefmachine by adjusting the stops'orews 27 untilthey bear on the pivot member 18, when the parts are artranged as showniin Fig. 3. v

In Figi 5, parts. hereinbefore described/have been designated by numerals previously used,

with the suffix a; The table 'l5ahas an upwardly' extended hollow hub 50, which surrounds the nut 14a,' 'with plenty of room'for the nut to I be turned: A'threaded standard is shown at 51', a and has'an enlarged base 52 which is threaded into the hub 50. A wing nut 53 is threaded v on the standard 51 and cooperates with a washer 54 in holding the rim which is being worked upon, in place on the standard 51. If theoperator wishes, he can detach the standard 51 by. threading its base 52 out of the hub 50, and the 8! article being worked upon then may be secured to the work table through the holes 30 of Fig.

'2, it being recalled thatthese holes may be placed wherever desired.

Having thus described the, invention, what is claimed isi p I 1. A stand of the class described, comprising a f-rame, a supportpivoted at its inner end to the frame, a first lever fulcrumed on the outer. end of the support and comprisinginner and outer arms, a prop having its upper end pivoted to the outer'arm of the first lever and having its lower.endpiv0tedto-the frame below the support, an operating'lever'fulcrumed intermediate its'en'ds onthe intermediate portion of the prop, a link pivoted at'its lowerend to the innerend ofthe operating lever, the upper end of the' link being pivoted to the inner arm ofthe first lever, stopmeans'carried by the firstdcver and en-'- gaging the support to 'inaintain the, upport and the outer arnr of the" first lever substantially in longitudinal alinement when the support is in outstanding relation, to the frame, alldfaf work tabie carried by the'first lever; V

2. The. stand of claiin Land wherein the stop means is ahub on the first lever, and'means on the hub for attaching the work table to the first lever.

A stand of the class described,,comprising a frame, a support pivoted at its inner end to 119 H the frame, a first lever fulcrumed on the. outer end of 'thesupport andicoinprising' inner and outer arms, a pro'pha'ving its lower end pivoted to the frame below the support, apivot member connecting the upper end of the prop with the1 15 outer armof the leverptheprop', the pivot member and the outer arm of the first lever constituting connected elements,' anfoperating lever fulorumed intermediate its ends on theintermediate portion of the prop, alink pivoted at its lower end to, the inner end ofthe operating lever, the upper endof the link being pivoted to the inner arm of the first lever, stop neans carried by the first lever'and engaging the support to maintain the support and the outer arm of thefirst lever substantially inzlongitudinal alinernent when'the support 'is in outstanding relationto the framea work table carried by the first 'lever,-"'and a stop carried by the support and engaging one of said connected elements when the' inner end of the operating lever and the link are in substantial longitudinal alinement f V i. The stand of claim' 3, in combination with means for mounting the stop forladiustment to and iron; that one of said connected elements wherewith the stop engages." J

v 5. Thestand of .claim 3, in combination withrneans for mounting the stop in such-positionfon the support that the said pivot member is the one oi's'aid connected elements wherewith the 7 stop engages.

-6. The stand of claim 3, and wherein the stop is screw threaded for adjustment upon thesupport and so located thereon that the said-pivot member is the one'of said connected elements wherewithgthe stop engages." I

' JAMES KENNETH LISTEBARGEE