US2268282A - Pliers - Google Patents

Description

A. C. GARY Dec. 30, 1941.

PLIERS Filed March 26, 1940 2 Sheets-Sheet l WITNESS Dec. 3o, 1941.

A. c. GARY PLIERS Filed M arch 26, 1940 2 vSheets-Sheet 2 -5/ /Wwv ffm? E' myw ATTORNEYS WITNESS Patented Dec. 30, 1941- UNITED STATES PATENT OFFICE ramas Alvin c. Gary, Brooklyn, N. Y. Application Mms ze, 1940, serial No. 326,085

(ci. azi-5.1)

2Claimx.

ing and closing the jaws respectively for extracting various objects embedded beneath the surface of a pneumatic tire or the like.

A further object of the invention resides in the provision of pliers having the above characteristics in which novel means is employed with; in the handle of the pliers for actuating the slidable serrated members upon movement of said handle whereby various embedded objects are readily removed.

A still further object of the invention resides` in the provision of pliers of this nature which are simple in construction, relatively inexpensive to manufacture, thoroughly efficient, reliable in use, and well adapted for the purpose for which they are designed.

The invention will be fully and comprehensively understood from a consideration of the following detailed description when read in connection with the accompanying drawings which form a part of the application.

In the drawings:

Figure 1 is a top plan view partially in section of a pair of pliers embodying the features of the present invention with the jaws thereof in closed position.

Figure 2 is a top plan View thereof with the jaws in opened position'.

Figure 3 is a longitudinal sectional view taken substantially on lineA 3 3 of Figure 1.

Figure 4 is a vertical sectional view taken substantially on line 4 4 of Figure 1.

Figure 5 is anenlarged sectional view taken substantially on line 5-5 of Figure 1.

Figure 6 is a top plan view of a modied form of the invention.

Figure '7 is a longitudinal sectional view taken substantially on line 'l-'I of Figure 6.

Figure 8 is an enlarged detail view of one of the jaws of the pliers with the slidable member in expelled position.

Figure 9 is a detail sectional view taken substantially on line 9-9 of Figure 7.

jaws Il and Figure 10 is a detail sectional view taken substantially on line I0-I0 of Figure 7.

While the present invention has been primarily designed for use in extracting glass, tacks or other objects embedded beneath the surface of pneumatic tires, it is to be understood thatwith a slight modification it can be employed for sundry other uses as for example, the extraction of particles of teeth which are embedded below the surface of the gums of the human jaw, for the extraction of small broken bones, pellets or other objects during surgical operations which may have become lodged below the surface of the skin, for facilitating the picking out of certain predetermined wires from a bunch of numerous control wires commonly employed in an electric telephone system, for facilitating a quicker and easier retrieve of objects such as brass bolts or nuts which have become lodged within and between apparatus such as radio sets and the like, or is applicable in laboratories where the temperature of handling tools is very essential and, in the latter case, the slidable serrated jaws are to be heat treated and insulated from the outer jaws.

Referring to the drawings for a more detailed description thereof, and particularly Figures 1 to 5 inclusive, there is shown a pair of pliers constructed in accordance with the present invention and generally designated by the reference numeral I2, comprising jaw members I3 and I 4 and integrally formed handles I5 and I6', respectively. The handles and integrally formed jaws are pivotally connected as indicated at I'I by conventional means comprising male and female screws I8 and I9, respectively, which extend through aligned openings 20 formed in ears ZI and 22, respectively, projecting from the handles I5 and I6, respectively, as more clearly shown in Figure 5 of the drawings. A tubular sleeve 23 surrounds the female member I9 and aids in maintaining the handles in properly spaced relation. This type of pivot construction is of convential form and is well known in the art.

The handles and jaws, respectively, are substantially U-shaped in cross section with the handles diverging from the jaws to assume the shape shown in Figure 1 of the drawings when said jaws are in closed position. Each jaw slidably supports therein a slidable member and the handles have attached thereto the means for actuating the slidable members as will be hereinafter more apparent. As afore indicated, the I4 are U-sbaped in cross section and each jaw has mounted therein for slidable movement a member 24 and 25, respectively, formed with serrations 26, said members adapted to be extended to substantially the position showninFigure2otthedrawlnitsllvoncon` pressing the handles I5 and I5, respectively. 'Ihe handles are returned to their normal spreading position upon release of pressure thereon by means of a tension spring 21, the ends 28 and 25 of which are nxedlyvsecured in the respective handles I5 and II. compressing the .handles will compress the spring 21 and upon releasing pressure thereon, said spring will return the han dles to their normal position, which position is showninFlgurelofthedrawings. Apairot hat rod-like members 3l are pivotally attached asindlcated at Il to an ear22i'ormed1neach handle, the opposite ends of the members 3l being disposed in overlapping relation and having pivotally attached thereto as indicated at 33 a horizontally disposed member 3l, the members 2| and il, respectively, being in theform o! links. Asubstantially U-shapedsprlngsteelwireis attached centrally of its ends with a pivot pin 3i carrledontheireeendofthelink,eachend of said wire. 35 extending on opposed sides of the pivot connection Il with the ends thereof welded or otherwise secured at 31 with the slidable jaw members 24 and 25, respectively. Thus the pivotal connection l1 forms a guide for the spring steel rod-like member 35'. compressing the handles I5 and il together will compress the spring 21 and, in addition thereto, collapse the links 30 to project forwardly the link 34 and member 3i and since the members 2| and 25,

respectively, are attached to the member 35, said members will be extended beyond the outer ends of the jaws Il and Il, respectively, the entire y mechanism moving as a unit. Upon the release oi' pressure on the handles, the spring 21 will return said handles to normal position carrying with them the movable unit.

Referring more particularly to Figure 4 of the drawings, it will be noted that the slidable members 24 and 25 are wedge-shaped in cross section and slide within a similar shaped trackway formed in the jaws I3 and Il, respectively, and are thus prevented from accidental disengagement while permitting free sliding movement.

In the use of the pliers for removing, for example, an embedded tack within the surface of a pneumatic tire, the nose portion of the jaws I3 and Il will rst be inserted into the damaged section lmtil contact is made with the embedded object. 'I'he handles I5 and I6 are then squeezed together to project the members 2l and 25 whereby the serrated portion of said members will automatically grip the embedded object, then a slight twist of the pliers and a release of preure on the handles will retract the slidable members a suillcent degree for a gripping contact with the object Vwhereby withdrawing the pliers will cause the removal 4oi.' said object. The use of the pliers` arenotreadllyscceibletotbestraightjaw ispeotpliers Itwillbeobserved.however.that apairoicurvedjawsandaresnintegral partoithehandllland42,respectively.and arepivotallyeonnectedasinditedatllintbe mannerpreviouslydescrlbed. Asinthepreferred fornapairotlinksllarepivotallyconnected tothehandlesllandl2,respectively,andthe reeendsofsaidlinksareattachedtoahorinontallyextendinglinktromwhichextendsa U-shapedsteelwire. Apairofserratedjaw members II are mounted for slidable movement inthejawsilandllandareadaptcdtobe extendedandretnctedbycompressingthehandlesllandasinthepreterredform. Dlsposedoftheslldablememberlland theendllofthewireareaserlesotrollers l! mounted beneaththeshonld'erofatrnckwas 5|,saidrollersadaptedt0bereciprocatedwithin thetrackwaybysctionotthewirewhencomparticularlytoliiguru'IJandQotthedrawings. itwillbenotedthattherollersareunitedin pairsbymeamoflinksILsaidlinksbdmalternatelymopposedsidesoftherollers soastooccupyaminimnmamountotspace withinthetrackway. Itis'tobeunderstoodthat atrackwaymndsericsofrnllersthereinisformed ineachjawandthatthemdslldthewire liareattachedtoeachseriofrollexaasmdicatedat52.

Uponcomtbehandlesllandto thedottedlinepositinnshnwnlnliigureofthe drawings,thelinksllandl5wlllurgetheu shapedwireforwardlywlnehinturncanses movementoftbeaerlesofrollerswithinthe trackwaytoextendthemembersllbeyondthe endsofthejawsllandlltotheposlonshown inFlgureotthedrawlngs. 'I'hetensionspring 53willreturnthemovablepartstotheirnormal positionsuponthereleaseofonthe handles. Thejawsllandllareotcourseextendedtothedottedlineposltionshowninligureofthedrswinssuponcompresnngthehandles 4| and42,saidjawsbeingextended simultaneouslywithmovemmtoftheslidablemembers 41. Asinthepreferredi'mtheslidablemembersllareformedwithserratedteethlltor gripping articlorobjectsbeingretracted.

Theoperatimoftheplieninthemodiiled formissubstanallythesameasthatdescribed in the preferred form. which is thought to be readilyapparent when condderlngtheaccm 1:ip anying drawlrs with the hereinabove dcrlp` Alsoitwillbeoicourse,bythose skilledintheartthatvarlaonsinthehereinabovedescribeddeviceinvolvingthesuhstihition of substantial equivalents for the devies describedareintendedtobewlthin thespiritottheprmtinventionandthatthe invention is capable of extended application and isnotconflnedtotbeexactsbowingofthedrawings nortotheprecisedescxibed and,thereiore,sucbelnmandmodiiications maybemadethereinasdonotail'ectthesmrit.

oftheinventionnorexceedthescopethereofas claims.

membersandlnndlesbeingsubstantially U handle, a second Jaw member and integral han- 10 die pivotally connected to the former. said Jaw members being curved at an angle with respect to said handles, a member slidably supported within each of said jaw members, a series of rollers supported within each of said Jaw members and attached to said members, and means carried by said handles attached to said rollers for actuating said slidable members through said rollers.

ALVIN C. GARY.

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