US2519630A - Plier wrench - Google Patents

Description

H. N. BOYER PLIER WRENCH Aug. 22, 1950 Filed Aug. 12, 1946 lll 3nventor Hug/2 M 5 0 yer'.

- attorney ///X/////AK ////x/ ra Patented Aug. 22, 1950 PLIER WRENCH Hugh Nrl doyerjnear Canfield, Ohio; Elizabeth M.- Boyer executrix of said Hugh N. Boyer, deceased Application August 12, 1946, Serial No. 689,859

f'llhisinvention relates to a plier wrench and more-particularly to a wrerichin which the jaw portions are maintained in'pa'rallel' relationship, The principal object of;the.invention is the provision of a plier-type wrench having jaws posh tioned for operation in parallel relation.

A further. object of the invention is the provision of aplier wrench having fixed andmovable jaw portions and a, handle and variable fulcrum means for imparting motion to the said movable jaw portion. 7 v s -A' sti ll further object vof the, invention isthe provision of a plier wrench having fixed and movable jaw portions and means for moving the movable-jaw portion into engagement with the fixed jaw portion and maintaining it'in engagement therewith. I v f v A still further object of the invention'is the provision of a plier-type wrench having fixed and movable jaw portions, the said; movable jaw portion having a eornbination sl0t andpivot and multiple lever guiding and motivating means The plier wrench shown and described herein has been designed inform a more satisfactory type tool than has heretofore been available particularly with respect to the relative positioning of the jawsof the wrench during their opening,

and closing operations, p p In the various plier-type, wrenches, heretofore known in the art, several meanshave been employed to move a movable jaw intoppposed relation with a fixed jaw and in so doing pivot the movable jaw with the result that the, jaw moves in an arc and does not remain in parallel relation with the fixed jaw of the wrench. This considerably decreases the efliciency of the wrench as the work piece grasped by the'wrench is not uniformly held unless it chances to be the pnecise size upon which the wrench will close with the jaws in parallel position.

The present invention relates to a plier wre nch, the jaw portions of which maintain their parallel relationship from'the completely closedposi: tion "to the widest possible opening. The'objects of the invention are achieved by a novel manner of positioning, mounting and moving the movable jaw of the wrench with relation'to the fixed jaw thereof.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement 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 can be 2 l made within the scope of what is claimed without departing from the spirit of the invention." a

The invention isillustrated in theaccompanyg ing drawing, wherein:

Figure l is a side view of the plier Wrench, 1

Figure2 is a front end view of the plier wrench.

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

By referring to the drawings andFigures 1 and 2 in particular, it will be seen' that the plier? wrench comprises a main member ill, the forward portion of which is indicated by the numeral H and is provided with a fixed jaw l2 or may not be integrally formed with body member ill. The rearmost portion "of'the body member H3 is indicated by the numeralgl3 and takes the form of a tubular member in-, ternally'threaded for the reception of an adjust ment screw M which in turn is provided with an enlarged knurled end-section I5 and is capable of axial travel with respect to the body member 18 by reason of its threadable engagement with the end portion l3 thereof.

The plier wrench is provided with a movable jaw 16, a portion ll of which is formed similarly to the jaw I2- and is adapted to register therewith. The movable jaw body 16 is of'a generally triangular shape with the apex; of 'the triangular shape forming the foremost portion of the jaw The base of the triangular shape lies atan- I7. angle of inclination with respect to the axialdi mension of the body member H3. The jaw body It has a slot is formed therein on the same plane as the base of the triangular-form of the movablejaw body it, In position inythe wrench, the movable jaw body l6, and more particularly the slot 53 therein, slidably engages a guide pin I9-positi0ned transversely of the body member 18, which is generally U-shaped in cross section?" with the exception of the area adjacent the mov able jaw body |6 which is cut away to form an opening generally indicated by the numeral 20;

It will thus be seen that the movable jaw body It can be moved toward and away from the 1 fixed jaw 52, and due to its positioning in the body It of the wrench, the jaw I! will alwaysbe iniparallel relationship, to the fixed'jaw l2.

Means for imparting movement to the movable jaw body It is provided and is responsible for maintaining the parallel spacing of the jaws l2 and IT. This means comprises a pair of similarly formed and positioned links 2i, the uppermost ends of which are pivoted to the outer portions of the body member I!) by means of a transversely positioned pivot pin 22 and the rearmost which may the main ends of which are pivotally aflixed to the movable jaw body [6 by means of a pivot pin 23. The pivot pin 23 also serves as a point of attachment for the forward end of a handle member 24 which is provided with a secondary transversely positioned pivot pin 25 rearwardly from the foremost end thereof by means of which a fulcrum link 26 is pivotally affixed to thehandle 2,4. The oppositeend of the fulcrum link 2:; lies within the body member it which is U-shaped in cross section and is provided which the innermost pointed end of the threaded adjusting screw l4 engages.

It will thus be seen that theplier-wren-cnheree in disclosed is possessed of two-desirable quailties, one of which is its ability to maintain the jaws l2 and Il thereof in parallel relation, and the other of which is its abiity to be locked. on or snapped on to an object between the jaws I2. and H regardless of its size by thesimple expedient of adjusting the adjusting screw Ht into. or out of thebcdy, member Hi andhencc varying the effective length of the fulcrum link 26.

In order that the movable jaw, body It ma be normally biasedinto open position, alcoil spring 28 is attached to an eyelet 29 formed in the base of the movable jaw body it. The other end of'the coil spring 28 is afhxed to a pint!) transversely positioned in the body member IEL By referring now to'Figure 3 of the drawings in which a vertical cross section of the plier wrench is shown, it will be seen that the act of moving the handle 24 upwardly toward the body member it results in aforward movement of theforward end. of the handle 29, by reason of the pair of links. 2! describing an are based on the pivot pin 22. The motion thus imparted to. the movable jaw body l6 adjacent. its base portion moves the movable jaw body l6. up.- wardly with respect to. the fixed jaw l2 maintaining the jaw i! in parallel relationship with the jaw l2 throughout the movement by reason of the controlled movement of the movable jaw body resulting from the guiding action of the guide pin l9' cooperating with the slot ldformed" the arc of the pivot" pin in the movable jaw body I It willbe observed that 23 is controlled by the pair of links 2? based on the pivot pin 22 and that theangular posi tioning of the slot i8, with respect to-the axial plane oi the handle member ID of the'plier wrench, imparts a controlled and guided motion to the movable jaw parallel spacing and positioning of the jaws l2 and i? at all times.

The second action of the wrench, comprising its abilityto maintain itself in position on an object positioned between the jaws l2 and H, results from the positioning of the fulcrum link 26- and its pointof pivot on the pivot pin 2'5 on the It will be obvious that when the.

handle 24. pivot pins 23 and line up with the socket z'l' in the upper rearmost end of the fulcrum link 26; a. direct, on center action is obtained and that when the handle 2-: is moved further to.-

ward the body member I6, an off-center looking;

with a socket 21 with body l6" resulting in the" action is achieved to hold the movable jaw body l6 firmly locked with respect to the body member I0 and jaw l2 therein.

It will thus be seen that a simple and efficient plier wrench has been devised which is simply formed by reason of its unique formation, is capable of maintaining the movable jaw body It thereof in parallel relation with the fixed jaw l2 thereof at all times, and that it is also capable of being looked upon an object with a snap tight locking action.

Having thus described my invention, what I claim is:

1. A plier type wrench including a body memher having a fixed jaw and a movable jaw positioned therein, a pin positioned transversely of the body member and a slot formed in the said movable. jaw and the pin registering in the said slot, means for imparting movement to the said movable jaw, the said means comprising a pair of. longitudinally spaced links pivotally engaging. the body member, a handle pivotally affixed to said links and spaced with respect to said body member, one of the said pair of longitudinally spaced links and one end. of said handlebeing pivotally afiixed on a common pivot on said movable jaw, the, other one of the said pair of longitudinally spaced links forming a fulcrum link.

2. A plier type wrench comprising an elongated body member having a fixed jaw at one end thereof disposed angularly with respect to the longitudinal axis of the body member, a movable jaw having agripping portion disposed outwardly fromv said fixed jaw and having a base portiondisposed angularly outward from said axis, meansmounting said movable jaw on said body member comprising means providing a sliding pivotal connection between the inner part of said base portion and said body member and a link pivotally connected at its outer end to the outer end of said base portion and pivotally connected. at its inner end to said body member, a handle pivotally connected at one end to said movable jaw member at the point of connection of said link and positioned outwardly of but generally a fulcrum link angularly disposed with respect to said axis and having its outer end pivotally connected to said handle and its inner end pivotally engaging the body member at an adjustable point along the opposite end portion of said" body member.

HUGH N. BOYER.

REFERENCES CITED The following references are of record in the file-of this patent:

UNITED STATES PATENTS Number Name Date 763,227- Walden June 21-, 1904 1=,l45,067 Kelly July 6, 191'5r 2,066,716 Cruickshank: Jan. 5, 1937 2,206,251 Fischer July 2, 1940: 2;280,0.05 Petersen Apr. 14, 1942- 2 399A54 Snell Apr. 30, 1946 parallel with said body member, and"

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