US2496262A - Jar lid wrench - Google Patents

Description

VW. MMFECLMY JAR LIED WRENCH Filed Dec. 19, 1947' INVENTOR.

my www y Patented Feb. 7, 195@ TENT OFFICE i claim. l

This invention relates to a jar lid` wrench, and has for its primary object to provide a wrench which is readily adjustable to tighten or remove jar lids', and which when used for either purpose will apply a gripping force to the jar lid proper tional to the resistance to turning the same, and which will apply the gripping force over a substantial area of the periphery of the lid, without ripping oir or flattening the corrugations of the same.

Further objects of the invention reside in the provision of a wrench of the type described which will be convenient in use, simple in construction and operation, and easy to manufacture,

The foregoing and other objects and features of the invention will be made fully apparent to those skilled in the art from a consideration of the following detailed description taken in conjunction with the accompanying drawing, in which:

Figure 1 is a top plan view of a jar wrench constructed in accordance with the invention, showing in full lines the position of the parts as applied to a jar lid for removing the lid and in dotted lines the position of the parts for tightening the same.

Figure 2 shows the wrench in side elevation.

Figure 3 is a bottom plan view of the wrench.

In the drawing, reference numeral ii) indicates the wrench handle, which may for example be a relatively flat stamping of stainless steel. The handle l!! terminates at one end in an arcuate jaw II, constituting the stationary jaw of the wrench which jaw is preferably of greater thickness than the handle I0. The jaw is provided with teeth I2 correspondingly spaced to the usual or standard corrugations on a jar lid or ring such as indicated at I3. The handle l) is provided with a longitudinally extending slot I4 having arcuate notches I5, IB and Il extending transversely thereto and on both sides thereof. A link I8, provided with a perforation adjacent one end to accommodate a bolt i9 for pivotally mounting the same on the handle I8. The bolt i9 extends through the slot of the notched portion of the Ble-3.44.) Q

2 Spanner keeping the jaws at the right dista-nce apart to fit into the recesses or eorrugations on the rings and lids, may be adjusted for any of the three standard jar rings or lids. For the small size, the bolt i9 is slipped into the notch l5, either to the right or left of the slot I4 depending on whether the lid is to be removed or tightened. For the medium sizes the notch. lr6 is used and for the larger size the notch I'I is used. Assuming that the wrench is to be applied to a medium size can or jar for removing a ring or lid therefrom, the parts are positioned as shown in full lines in Figure 1.

In applying the wrench to a jar lid for the purpose of removing the same the movable jaw 2| may be swung on the pivot 22 so that the right hand end thereof is somewhat above the position shown in full lines in Figure 1 to the end that a relatively wide space is left between the ends of the jaws on the right hand side to permit the jar lid I3 to be received therebetween. As the jaw 2l engages the periphery of the jar lid and swinging of the handle I to the right brings the stationary jaw firmly against the periphery of the jar lid, the link I8 swinging upon the pivots 22 and i9. Any further turning of the handle I0 to the right, that is in a counter-clockwise direction, turns the lid in a direction to remove the same while applying a gripping force proportional to the resistance to the turning movement.

When the jar lid is to be tightened upon the jar the bolt I9 is slipped into the proper notch on the left side of the slot I4, and the link I8 slants to the right, as shown in dotted lines in Figure 1. The end of the jaw 2l at the left side of the drawing is now well spaced from the outer end of the stationary jaw on this side so that a jar lid may readily be received between the jaws, and as the handle Il is turned in a clockwise drection, the jaws close on the rim of the lid and apply a gripping pressure as long as the handle lll is turned in this direction. The gripping force will again increase with an increased resistance to the turning movement in this direction.

To release the wrench from the lid it is only necessary to swing the handle I0 in a direction opposite to the direction in which it is turned to apply the clamping force to the lid. Thus after the lid has been tightened upon the jar it will be seen that by turning the handle I0 in a counterclockwise direction the link I8, which under these circumstances is in the dotted line position, will swing the jaws away from the periphery of the lid. That this is true will be apparent, if, for the sake of simplicity, we consider the pin 22 as a stationary pivot point, and it will be seen that whether the parts are in the position shown in full or dotted lines, turning the handle in the reverse direction to the lid removing or tightening operations, respectively, will throw the jaw I I away from the periphery of the lid I3, this move ment being reverse of the gripping movement.

While there has been herein described a preferred embodiment of the invention other embodirnnts within the scope of the appended claim will be fully apparent to those skilled in the art from a consideration of the form shown and the teachings hereof.

Having thus described the invention, I claim:

A jar lid wrench, comprising an elongated iiat handle, an arcuate jaw formed integral with the handle and disposed at the forward end of the handle and projecting laterally outwardly upon opposite sides of the handle, the forward edge of the arcuate jaw having teeth to coact with corrugations on the side of the jaw lid, the handle being provided longitudinally rearwardly of the arcuate jaw with an elongated straight longitudinal slot and a plurality of relatively short transverse arcuate siots crossing the longitudinal slot and intersecting the same, the transverse arcuate slots being spaced apart longitudinally and being substantially concentric with the arcu ate jaw, the transverse arcuate slots extending laterally outwardly upon opposite sides of the longitudinal slot, an elongated straight link slidably mounted upon one side of the handle, a bolt secured to the link and extending through the slots of the handle for pivotally connecting the link and handle, the link extending forwardly of the arcuate jaw for a substantial distance and rearwardly of the longitudinal slot of the handle, a pivot pin secured to the forward end of the link, and a forward companion arcuate jaw plvotally mounted upon the pin and extending laterally upon opposite sides or the link, the inner edge of the forward arcuate jaw having teeth to coact with the corrugations of the jaw lid, the bolt secured to the link being shiftable in the longitudinal slot and transverse arcuate slots.

WILLIAM BARCLAY.

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

UNITED STATES PATENTS Number Name Date 921,250 Hough May 11, 1909 953,467 Kahn Mar. 29, 1910 1,168,669 Murdick et al Jan. 18, 1916 1,913,535 Cressey June 13, 1933 2,093,658 I-Iildenbrand Sept. 21, 1937

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