US2481435A - Leverage wrench - Google Patents

Description

C. M EU N 1ER LEVERAGE WRENCH sept. s, 1949.

2 Sheets-Sheet l Filed Oct. 9, 1945 OWS;

IT r l c. MEUNIER Sept, 6,y 1949.

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W M+ W Patented Sept. 6, 1949 UNITED STATESVv PATENT OFFICE i I 2,481,435

LEVERAGE WRENCH Charles Meunier, Great Neck, N. Y. Application October 9, 1945, Serial No. 621,221

This invention relates to wrenches of the type having gripping jaws for engaging an article therebetween and the invention has particular reference to a wrench of said character for imparting reciprocatory movement to one of the jaws toward and away from the other jaw and for locking the movable jaw when the same is disposed in adjusted position.

The invention has in view a movable jaw mounted for reciprocatory movement by of a rotatable screw connected therewith by means of a link and a pivotedly connected locking handle adapted for movement of the pivotal connection with the link to a past dead center position after the movable jaw has been adjusted to the desired position with reference to the iixed jaw by rotation of the screw, the movement of the locking handle effecting a further movement of the movable jaw towards the fixed jaw for. securely engaging an article between the jaws and a locking of the jaws therewith.

The invention has for a vision of a holder having opposite side walls between which are mounted the movable jaw and the operating mechanism for imparting reciprocatory movement thereof toward and away from the opposite jaw afixed to the end of the holder.

The invention further comprehends a wrench of the indicated character in which the end of the holder and the locking handle adapted to be grasped for manipulating the wrench are angularly offset with reference to the gripping jaws of the wrench for facilitating manipulation of the wrench and looking handle.

With the foregoing and other objects in view reference is now made to the following speciiication and accompanying drawings in which is illustrated the preferred embodiment of the invention.

In the drawings:

Fig. 1 is a side view of a wrench constructed in accordance with the invention and illustrating the locking handle swung to fully open position.

Fig. 2 is a similar view illustrating the jaws in clamping engagement and in dotted outline the locking handle swung to locking position.

Fig. 3 is a top plan view of the wrench.

Fig. 4 is an enlarged vertical sectional view taken approximately on line 4 4 of Fig. 1.

Fig. 5 is a similar view taken approximately on line 5-5 of Fig. 2.

Fig. 6 is a similar view taken approximately on line 6-6 of Fig. 2.

Referring to the drawings by characters of reference, the wrench includes a holder I0 of U- further object the pro- 1 Claim. (Cl. S51-88) shaped formation in cross-sectional configuration providing opposite longitudinal extending 'side walls II and I2 which are extended outwardly at one end thereof and have secured thereto a fixed heador jaw I3 formed with a serrated gripping face I4. 'A movable head or jaw I5 formed with a serrated gripping face I6 is disposed'in confronting'relation with the fixed head or jaw I3 and is provided with a reduced longitudinal portion I'I projecting into the holder between the side walls II and I2 thereof for guided reciprocatory movement on transverse pins I8 projecting Vthrough a longitudinally extending slot I9 in the reduced portion I1 thereof and with their protruding ends anchored in aligned openings in the side walls II and I2.

In order to provide means for imparting longitudinal reciprocatory movement of the movable head or jaw I5 toward and away from the fixed head or jaw I3, a link 20 is provided which is pivoted at one end on a pivot pin 2| to the downwardly projecting bifurcated rear end of the reduced portion I1 of the movable head or jaw I5 and at the opposite end the said link is pivoted on a pivot pin 22 to the bifurcated forward end of a locking lever or handle 23. The locking lever or handle 23 is also pivoted on a pivot pin 24 to the upwardly projecting lug at the forward end of a reciprocatory bar 25 slidably arranged on the bight, connecting the opposite side walls II and I2 of the holder and having a rearwardly extending screw 26 engaged by a thumb nut 21 with opposite peripheral portions thereof protruding through cruciform openings 28 in the opposite sidewalls II and I2 of the holder.

The bar 25 is provided with an upwardly extending projection 29 defining a. stop adapted to be engaged by the locking lever 23 for limiting the inward movement thereof While a tubular roller 30 mounted on a pin 3l is adapted to engage the upper edge of the bar 25 for preventing upward tilting thereof. A longitudinally extending block 32 is secured between the opposite side walls Il and I2 of the holder I0 with the forward end thereof engaging beneath the rearwardly projecting reduced annular boss of the thumb nut 21 for maintaining the same centrally within the cruciform openings 28. A longitudinally extending block 33 is also provided which is secured within the holder I0 beneath the movable head or jaw I5 with which it slidably engages to prevent undue wear on the pins I8.

The locking lever or handle 23 is of inverted U-shaped formation in cross-sectional configura,- tion and the same is swingable on the pivot pin 24 tive to article therebetween the locking lever or handle' 23 is swung outwardly to dispose the link 21Minv Y article. and securely locks the to an outwardly extending position as illustrated in Fig. 1 with the pivotal connection of the link 20 therewith on the pivot pin 22 moved inwardly to a past dead wardly extending relation the locking lever or handle 23 is adapted to be swung to a locking position as illustrated in Fig. 2 in which the pivotal connection of the link therewith on the pivot pin 22 ismoved to a, past dead center position out-V wardlyfof lonitudinal alignment With'tlie pivot pins 2| and 2li. Y

each other into gripping relation with an inward past dead center position after which the thumb nut 27 is turned on the threaded screw 26 to eiect longitudinal movement of the movable head or jaw I5 into engagement with the article. The locking lever or handle 23 is then swung inwardly to dispose the pivotal connection of the of' the rear encl portion of the wrenchfor manipulating the same.

What is claimed is: 'Y In a wrench, a holder of U shaped formation in crossesection providing longitudinally extending opposite side wallsand a rounded rear Wall and including an elongated handle portion and a forward portion disposed at an angle to the handle v portion, fixed and movable jawsca'rried by saidV forward portion, said movable jaw having a longi- In order to adjust the jaws rela'-v center position. From said out- Y `the same side thereof of the user able from tudinally extending slot opening through the opposite'sides thereof, cross pins mounted in the Y opposite side wallsofsaid Vholderand extending through said slot for guided reciprocatory movement of located between the side walls ofthe handle portion and having a threaded shank, a link pivoted atits forwardvend to said movable jaw, a locking Y ,handler pivoted at its innerend 'in spaced apart relation to the forward end'of said bar and to the 4 rear end of said linky and projecting outwardly from between the walls of the handle portion on as said jaws for` facilitating manipulation of the locking handle by the fingers and said locking handle being swing'- an angular position with reference to the handle portion of said holder to a position sub.. stantially aligned therewith for moving thermovable jaw toward and away from the xed jaw and forjretaining the .same in locked position aaginst Yan article held between the jaws and a'rthumb-nut swivelly mounted-in openings in the side walls of eneaginesaid said handle portion and threadedly v shank for impartingV increments of adjustment to the movable vjaw toward and away from the iixed jaw. .1, Y

R,EEERNCE-Sv CITED o j s The following vreferences are of' record inthe file of this patent:

' UNITED ,STATESV rA'rENTs i Date Number Name Y Y Y 623,188 Skersick Y l Apr. 18, 1899iV 1,697,535 McGill V. Jamil, 1929 1,735,011 VPlante Nov. 12, 1929 1,829,473 vChew Ooi-27, 1931 2,312,947 Westman V Y Mar. 2, 1943 2,313,270 Sapp said movable jaw toward and away from V Y* Vsaid iixed jaw, a longitudinally reciprocatory bar Mar..- 9, 1943

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