US2452849A - Wrench with spring closed jaws and handle and pawl feed - Google Patents

Description

0. M. GROSS WRENCH WITH SPRING CLOSED JAWS Nov. 2, 1948.

AND HANDLE AND PAWL FEED Filed Oct. 5, 1945 2 Sheets-Sheet 1 Fig. 8,

Fig.9. Q

OSI/YALD /v/. 6/9055 INVENTOR lylzfl ATTORNEYS 0. M. GROSS WRENCH WITH SPRING CLOSED JAWS AND HANDLE AND PAWL FEED Nov; 2, 1948.

2 Sheets-Sheet 2 Filed Oct. 5, 1945 26 l kw 09mm M. 62055. INVENTOR ATTORNEYS Patented Nov. 2, 1948 UNITED STATES PATENT OFFICE WRENCH WITH SPRING CLOSED JAWS AND HANDLE AND PAWL FEED Oswald M. Gross, Detroit, Mich. Application October 5, 1945, Serial No. 620,441

(or. s1-s9) I 4 Claims.

ldle where they are protected from dirt.

A further object oi -the invention is to. provide a wrench of this type which can be manufactured I at alow cost in large quantities and which is simple in assembly and highly efficient in operation. Further objects will moreparticularly appear in the course of the following detailed description.

, The invention consists in the novel construction, arrangement, and combinations of parts hereinafter described and claimed. ,7

Two sheets of drawings accompany this specification as parts thereof in which like, reference characters indicate like parts throughout.

In the drawings: 7

Figure 1 is a perspective view of the improved W en 7 a Figure 2 is a side view of the wrenchin open position and partly broken away to disclose the operative parts.

Figure 3 is a plan view of Figure 2.

Figure 4 is a right-hand side view of Figure 2,

Figure -5 is a left-hand side View of Figure 2;

Figure 6 is a plan view of the base plate shown .in Figure 2. p v

Figure 7 is a front elevation of the base plate shown in Figure 6. I y

Figure 7a is a side elevation of the plate .shown in Figure 7. V

Figure 8 is an end view of the operative handle.

Figure 9 is a side view of the operative handle.

Figure 9a is a ba-ckelevation of the handle shown in Figure 9. n

Figure 10' is a plan view of the movable jaw member.

Figure 11 is a side View of the movable jaw member of the wrench.

Figure 12 is a side elevation lookingfrom the right of the movable jaw member, shown in Figure 11. i 1

Figure 12a is a side elevation of thejaw member looking from the left.

Figure 13 is a plan view of the slidable cam member.

Figure 14 is a vertical .cross section through the slidable cam member.

Figure 14a is a side elevation of the slidable cam member.

J shown in Figure 1'7.

Figure 15 is a fragmentary perspective of the wrench having a modified form of jaws. I Figure 16 is a plan view of this modified form of wrench. I Figure 17 is a front view of this type of wrench with jaws open.

Figure l8 is a right-hand side view of the wrench shown in Figure 17 Figure 19 is a left-hand side view of the wrench In accordance with the present invention a tubular handle I is provided formed at one end with a fixed jaw part 2 having an outwardly directed fiat face 4! adapted to engage a nut or "bolt and an angularly disposed face 42 adapted toreceive-a similar projection 40 formed on the movable jaw member I3. The movable jaw member. I3 is provided with an inwardly directed face 39 adapted to coact with face 4| to engage a nut and with an extension shaped and proportioned to slide within the tubular handle member I.

' This extension is cut away for the major part of its length to provide clearance in the tubular handle for a slide cam member and an operative handle as will be hereinafter described. The lower portion of the extension of jaw member I3 is threaded as shown at I2, or otherwise provided with transverse serrations and is also provided ,with a threaded hole 32 adapted to receive a thumb screw 33 which extends through a longitudinal slot 34 in the tubular handle I to permit manual adjustment of the jaw member I3. by the thumb of the user.

The lower end of extension of jaw member I3 is provided with a slot 28' within which-is positioned a transverse pin 3I adapted to anchor one end of a spiral spring 30' arranged to-normally draw the ,jaw member I3 toward the tubular handle toengage a nut.

A second longitudinal slot 3 is provided in the tubular handle l opposed to the serrated face of the extension of jaw member I3 and'within this slot is positioned the head It! of the operative hanj..camlmember, 4 has a face confronting the serrated face I2 of jaw member I3 providedwith similar serrations I I adapted to co-mate with the serrations I2 to interlock the cam member 4 with the jaw member I3. The cam member 4 is further provided with a downwardly directed extension I4 also slidable in the longitudinal slot 3 3, a continuation of which is notched as at I6 to provide a sliding engagement with the inner face of the adjacent wall of the tubular member I. A resilient extension I! depends still further and terminates at its bottom in a head portion 22 also proportioned to slidingly engage the inner wall of the tubular member. From this head 22 depends a finger [8 adapted tosriugly fit Within a spiral compression spring 20, which spring will abut against the underface 2| of the head 22 and 1 function to force cam member 4 upwardly in a straight line. The extensions, strand 182916 important in that they must maintain thecam member 4 normally in its outermost position and disengaged from the threads l2 ofthe jaw mem- "=21 and in pa'rti'clil-ar to 'maintain spring 20 in straight axial alignment. Closure member 'flis held *in position -in the tubular handle I by a 3 transverse pin ZBextending throughthesidewalls of the handle and through the closure member.

A modified form of "the wrench thus described is "illustrated in Fig ures 15 and 19 wherein the jaw menibers are fornfetl *as angiilarly disposed extensions 4 1 and '49, the'se extensions being provi'de'd-on their -inner confronting fa'ces with complementary 'notches dfl and 50. Itwill'be observed that the center dines-of notches 4B and 50 lie in -a common plane 'with the longitudinal axis of the tubular handle and that' the longitudinal axis of these two notiihes a're arranged parallel and 'at an angle to the longitudinal axis df the handle. The jaw 41 is -prferab1y'"-ma[de or tool steel formed -from a bar 45 bent "as indicated at 46. The "jaw 49 is prefe rably made :as a separate par't having an "apron like "po'rtibn forged from the niai'n block o'f the aw as indicated at 51 and secured byxweldinga alongath'e lines 53, 54f55 to(interface inf the man bf tubu1ar :-member I 3111 using tthi's wrench :the hexa'gbh somers of "the nut headiare'engagedibetween the notches? (and 50 and if :so :idesired to use the-flats of nut head, engagement can be ma'de b'etw'een surface ll-[and.uppensurface"dfimember fll and by reason \of the angular disposition :of these notchesan'd faces with respect 170 :the itubul'ar handle, the handle is elevated :from the iplane of the nuthead-so as toqpermit ampleiclearance f'o'rithe fin- .ger of-the-operator-in rotatingthe tool.

JIihe :operating mechanism in it'his form of the wrench is identical with that :previously described for the typeillustrated in =Figuresr1iand2. Various modifications in specific :details -will readily 1. A self-adjusting wrench comprising a w bular handle formed at one end with a nut engaging jaw, a complementary jaw member formed with an extension slidable in the handle, said extension having transverse serrations, a cam formed with a face confronting the serrated por' tion of the jaw extension and similarly serrated,-

Tsaid camslid-ablein the't'ubiilar handle, an opera t'ive handle pivoted o'nt'he tubular handle in alignment therewith formed with a cam face arranged to engage the slidable cam to operably dengagesaid cam with the serrated jaw extension, a closure-member for the tubular handle formed with a medial extension defining two parallel springdwells in the handle, a compression spring 's'ea'tdiin'nne dwelliand engaging the slidable cam and an expansion spring having its ends anchored "respectively to the slidable jaw and the bottom of the other spring dwell.

2. Self-adjusting wrench= comprising a tubular handle-formed-at one'en'd with a nut engaging jaw,=a-complernentar y jaw member formed with an extension slidable in'the-handle, said extension h-avi'ng tr ansverse serrations, "the tubular ha'ridle having 'a-long'itudinal slot-in its wall-conf'ronting the -serrated part df th'e .-j aw 'r'n'ember, I a

cam merxib'er formed with-a face confronting the serrated por -tion-of thejaw member-and similarly serrated, said cam slidably positioned in "said longitudinal slot, an {operative handle pivoted on the tubular h'andle 'with-a 'head'part Op'era'tivein th'e longitudinal slot, s'aid head fbrmedwitha cam face 'arran'gedto engage th'e slidable cam to-opera'bly engage said cam-with -the serrated jaw extension, a 'closure me'mber for --the tubular handle formed to provide dwells for two springs arranged respectively to draw the jaw member toward the tubular liandle and force the slidable camagainst'thecam faceof' the operative handle.

3. A wvrench -as -'specified-in claim 2 in which the slidable cam is formed withfa resilient'extenisiontermiriating in a head 'co'nstituting aseat for a coil spring, said head having a finger-adapted it'o'iseat slidably in and maintain said spiral spring Kin 1on'gitudinalalign1rfent.

4. A wrench as specified in claim- -2 in whic'h the cooperative c'am faces on'theslidablecam and operative haridle are so formd that initial rocking of the handle "will move-the cam transversely of 'th'e tubular'handle to interengage its serrations with those of the jaw member and further rokring of the handle will force thec'am and associated jaw member downward in the handle against the "pressure 'of tlrie spring a'ss'o'ciated mm the ham 7 member.

OSWALD M. GROSS.

REFERENCES 'CITED The following references are of reco'rd'in' the file of this patent:

UNI-FED STATES 'PATEN TS Number Name Date 753396 How'ar d Mar. 1, 1904 1,542,123 Eifel June '16, I925 1,573,64 7 Sewell Feb. f6, 1926 -2; 250;400 Stephens ';m1y"22,'1941

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