US1630976A - Valve-core extractor - Google Patents

Description

. J. R. C. SMITH vALvE; coma ExTnAcTon Filed Oct. 30, 1925 l Il ' INVETOR Jac/(Ratsm ATTORNEYS Patented May 31, 1927.,

`iiniriin stares y restait serios. l

JACK R. C. SMITH, OFVICTSRA, BRTISH CGLUMBIA, CANADA.

vVALVEGORE EXTRACTOR.

Application filed OctobrBO, 1925.V Serial No. 65,830.

Figure 1 is a side elevation of the valve'.

extractor, the valve core ywhich is intended toV be extracted being Ashown in dotted lines for the purpose of illustration. I f

Figure 2 is a Acentral longitudinal sec tional view of the handle of the valve extractor. y

Figure 3 is a cross section on the line 3-3 of Figure 2.

Figure 4 is a detail perspective view of the double pawl. Y

Figure 5 is across section on the line 5 5 of Figure 2.

Figure 6 is a detail perspective vview of the pawl spring and mounting plate.

It is commonly known that to remove the valve core, often referred to as the valve.

insides of va pneumatic tire is notreasily accomplished. The ordinary valve cap y1s slotted for the purpose, however, providing an inadequate hold upon the core thereby making the removing operation more laborious than itv ought to be.V The valve core sometimes sticks and inasmuch as the valve cap is frail the slotted end will twist yout oi shape and defeat the very purpose for which it is intended.

y The Vimproved tool is designed particularly for extracting and replacing the valve core.

Although the illustrations are vrelatively large, in practice the tool Awill be small enough to conveniently get between the spokes of the wheel so that the operation may be rcarried out without diiiiculty.

It consists principally oi a handle 1, shaft 2, core socket 3, return spring fiand button 5 by means of which the shaft is made to turn either right or left. spring 4 is disposed between a recess 6 in the handle body 7 and a cup-shapedterminal 8 on the socket 3. The purpose of the spring is to return the handle 1 tolthe upperv extremity of VtheV shaft 2 at the end of av stroke, and in order that the handle may be y limited the shaft is provided with a suitable,-

stop collar 9. v e

`A bore 10 in the body 7 houses the right and leiit hand nuts 11 and 12 through "which the shai't passes. The nuts include` toothed Y rims 13 and leiwitli which the blades 15 and- 16 of the double pawl 17 are respectively engageable. The double pawl occupies alateral opening 18 extending` from the bore 10.

A barrel 19lits around and is carried by the body, concealing` and holding the double pawi .in place. screw 20.

.Piiitles 21v at the extremities of the double rlhe barrel is retained by a,-

pawl have bearing in recesses22 inthe body 7. It isj anticipated thatthe double pawl canrbe made to serve the sainey purpose as followsby appropriately twisting it out of' Recesses123 in theV a single piece of steel.

sides of the double pawl receive the ends of' a curved leaf spring 24 the purpose of which is to hold the blades 15k and 16 in contact with the toothed rims of the respective nuts.

let

The lspring'is,attached to the mounting plate 25 (Figggs.l 5 and 6) which rides over .and covers the slot 26 in the barrel in whichslot the shank 27 Voi thebuttonv is movable. vThe ,l

shank l27 is attached to the mounting plate'` which thus carries' the button.

Shifting oi" f the button toward the extremities of the slot l v26 will kso change the tension of the ends of the spring that the double pawl 17 is made to rock upon itspintles 21 iii one orv Y the other direction so as 'to engage and lock'.

ties of the slots to liold'the button 5 in its I adjusted positions.

Studs 3() and 81 on the interior of thenuts 11 and 12 engage in the spiral grooves 32 and 33 in the shatt2. lnFigure 2- the stud 30 is situated on the far side otlieshaiit2- but the stud 31 is supposed to be on the near f f side. The studs are held in place in the handle bodyby means oi a lock collarB-/iwhich l has spanner wrench holes 35 which permit application and removal thereon.. vThe spring 321i, mentioned f before, occupies a curvedslot 36 4(Figs. 2 and 5) in the body 7,

' turn of thershaft. shifted over` 'so `that the shank 27 occupies `the right end of the slot 26 in Figure 5, the

- is then transferred to the opposite extremity .This fin is now engaged by the socket 3 when the tool is inserted .in the end of thev tire valve. The direction. of turning of the shaft 2 is determined by the position of the button 5. The particular position adopted in Figures 2, 3 and'5`Will produce a rightl hand The button 5 has been direction of shifting the button agreeing With the vdirection of turning of the shaft Which said shifting accomplishes'. Y The resulting buckling of the curved spring 24 puts it under tension but the double paivl 17 is rocked upon its pintles 21 sol that the blade 15 engages the toothed rim 13 ofthe right hand nut 11. The pres sure is. applied to the double pawl below its pivotal mounting, and the aforesaid rocking of the double paWl results. The blade 15 therefore locks the nut 11fto the handle 1. The operator now grasps the handle 1 and pushes dovvn. It is assumed that the socket V8 has been set in place upon the valve 4.

The stud 30, being locked, -t'o the handle VWill move in a rectilinear line, causing such displacement, so to speak of the spiral groove 32 that the shaft 2 Will turn in the clockwiseV direction, looking down upon the tool. Upon the return stroke of the handle 1 the toothed rim 13 Will simply ride over the blade 15 ofthe double payvl with a ratchet motion in the event that thev sprocket 3 is held in position Where the last turning ef. fort of the shaft left it. necessary that the socket 3 Vbe swivelly carried by the shaft. The foregoing operation Will serve to drive the core C into place in the valve stem. Upon shiftingthe button 5 to the opposite extremity of the .slot 26 the reverse action will take place.v The tension of the slot 26; the reverse action will take The tens-ion is thenl transferred to double pavvl 17 rocks until, the blade 16 engages and holds the toothed rim 14 of the Vnut 12. This nut 12 is then locked upon the handle 1, and apush upon the handle causes the stud 31 (Fig. 2)v to move in the rectilin- -ear directioucamsing such displacement'of the groove 33 as Will turn the shaft 2- in the counterolockivise direction, looking down upon the tool. This motion Will extract the `core C from the automobile tire air valve.

While the construction and arrangementl of the improved valve corel extractoris that l of aY generally preferred `form, obviously To this end Vit is modifications and changes may be made Without departing from the spirit of the invention or the scope of the claims.

I claim: i

1. A tool comprising a shaft having a pair of spiral grooves running in oppositedirections, a handle reciprocable upon the shaft and having ra bore with a lateral opening, a pair o-f nuts occupying the bore and hav- .ing studs engaging the respective grooves,

a double pa'ivl occupying the lateral opening and being pivotally mounted upon the handle, abutton which is shiftable to produce f the direction of vturning of the shaft `dei sired, resilient means including .a curved spring engaging' the sides of the pawl soA that shifting ofthe button and the resulting ac.- tion of the spring rocks ythe pawl uponyits pivots and locks one or'the other nuts uponY the handle, the other nut remaining loose l and idle, a socket swivelly carried by the i shaft to engage a tire valve core, and a spring interposed between the socket and the handle to resistthe movement of the handle along the shaft in one direction When said shaft is turned by virtue of the operation of said locked nut.

tool comprising a shaft having a pair I of spiral groovesrunning in opposite direcy tions, a handle carrying a shiftable button, a pair of nuts carried by the `handle and` having studs engaging the respective grooves and having toothed rims, a double paWl pivotally mounted in the handle and having a recess at each side, a curvedv Aspring carried by the buttonv having its extremities `engaging the respective recesses so that shift-l curvedslot communicating at itsends With said lateral opening, a pair of nuts situated in the bore eachfhaving a stud engaging a.. respective groove and having a toothed portion, a shiftable button, a double pawl occupying said lateral opening and having pintles journaledupon the handle body, a l

barrel engaging the body to conceal lthe double paivli and having a` slot thereon, af

shank carrying the buttonextending through and being carried by the slot, and'aI curved spring carried by the button and having the opposite end extending around the' curved `slot into engagement With'the sides of the paivl to accomplish rocking of the paw] upon itsipintlesas the button-'is slid in the slot whereby to lock one or the other vof thekfnutsff upon the handle for turning of the shaft in a given direction.

4. A tool Comprising ay shaft having spiral grooves running in opposite directions, a handle body reciprocable upon the shaft and including a barrel, there being a slot in the barrel with recesses adjacent to the eX- treinities of the slot; a pair of nuts carried by the handle and having studs engaging the respective grooves, a double paWl carried by the handle and having recesses at the sides, a curved spring carried by and actuated by the button to rock the double paWl and lock one or the other of the nuts upon the handle, the extremities of the spring engaging said paWl recesses, and amounting plate carrying the button to Which mount` ingplate the spring is applied, said plate JACK n. o. SMITH.

Images