MXPA03007074A - Utility bar with bowed shank. - Google Patents

Abstract

A utility bar is disclosed comprising a bowed shank, a lever piece and a junction that couples the shank to the lever piece. A chisel may also be coupled to the bowed shank.

Description

UTILITARIAN BARRIER WITH ARCHED VASTAGO BACKGROUND OF THE INVENTION Numerous utilitarian jumpers or lever tools have been known, these exhibit different configurations and sizes. Most of the barretas operate like a lever. A first class lever is one where the load to be overcome is at or near one end of a rod and a force is applied at or near the other end of the rod and a pivot point (fulcrum) is in some part along the shank between the applied force and the load. Thus, the user seeks to obtain a mechanical advantage by placing one end of the rod adjacent to the object to be moved and providing a pivot point around which a longer moment arm is provided in such a way that substantial forces can be applied to the object to be open or moved by lever. Examples of utilitarian jibs are disclosed in U.S. Patent Nos. 5,957,429 and 6,257,553.

BRIEF DESCRIPTION OF THE INVENTION This invention, with its various desirable characteristics, is summarized in the claims that follow. After reading the following section entitled "detailed description" it will be understood how the features of this invention provide its benefits, which include, but are not limited to providing a utility bar with an arched shank offering an improved mechanical advantage and providing the user with a Free end spaced from a surface of an object to be leveraged. The utility jib of this invention comprises a plate piece and an arcuate rod formed integrally from a single piece of metal. The lever piece and an arcuate rod form a substantially L-shaped lever hook. The arcuate rod has a curved central line extending longitudinally with a first end and a second end between which the curved center line extends. The lever part and the center line of the shank form an angle of 90 ° or less. The lever piece is facing inward from the first end and has a substantially flat and straight outer surface. The lever part and an arranged stem are joined together by a joint having a curved outer surface that fuses with the outer surface of the lever part. The joint is substantially V-shaped with two legs of the joint forming an angle of 90 ° or greater. An interface between the joint and the lever piece defines a starting position of a traveling pivot point that falls into the center line. The greater the distance from this starting position of the center line, the greater the mechanical advantage provided. The jig can also include a bevel piece at the second end of the arched shank. The bevel piece can be facing either outward or inward.

BRIEF DESCRIPTION OF THE DRAWINGS Some preferred embodiments of this invention, which illustrate all its features, will now be discussed in detail. These embodiments illustrate the new and non-obvious utilitarian jib of this invention as shown in the accompanying drawings, which are for illustrative purposes only. These drawings include the following figures (figures), like numbers indicate similar parts: Figure 1 is a perspective view of the bar of this invention. Figure 2 is a side view of the bar. Fig. 3 is a cross-sectional view of the bar taken along line 3-3 of Fig. 2. Fig. 4 is a view of the bar taken along line 4-4 of Fig. 2. Figure 5 illustrates a circular curvature of the center line of the shank. Figure 6 illustrates an elliptical curvature of the centerline of the shank. Figure 7 illustrates the bar inserted under an object. Figure 8 is an enlarged fragmentary view of the bar along the line 8 of Figure 7.

DETAILED DESCRIPTION Some Preferred Modes Referring to Figures 1, 2, 3, 4 and 8, the utilitarian jig 10 generally comprises an arched shank 12, a lever part 14 and a joint 16 which engages the shank 12 and the lever 14. The rod 12 has a first end 12a and a second end 12b and a curved central line 12c extending longitudinally between the first end 12a and the second end 12b. Referring to Figure 3, the cross section of the stem 12 has substantially an hourglass configuration. The hourglass configuration has an outer rounded surface 20, an internal rounded surface 22 and curved surfaces 24 and 26 that join the rounded surfaces 20, 22. The cross section of the rod 12 may have other shapes, such as hexagonal, elliptical and circular. As illustrated in FIG. 5, the centerline 12c of the shank 12 may take the form of a portion of a circle 32 or as illustrated in FIG. 6, may take the form of a portion of an ellipse 34. Referring to FIGS. 1, 2 and 4, the lever part 14 is substantially wedge-shaped with a flat, straight outer surface 14e, a flat, straight internal surface 14f, a connecting end 14a, a leafy end 14b and sides 14c and 14d. The angle A between the outer surface 14e of the lever part 14 and the centerline 12c of the stem is commonly ninety degrees (90 °) or less. In one aspect of the invention, the dice 14c, 14d of the lever part 14 are tapered, preferably wider at the leaf end 14b than at the joining end 14a. In one embodiment, the lever part 14 has a notch 15, with the open end 15a of the notch at the blade end 14b of the lever part 14 that divides the lever part 14 into two leaf segments 15c and 15d. Referring to Figure 8, the thickness t2 of the blade end 14b of the lever part is less than the thickness ti in. the joining end 14a to facilitate the insertion of the bar 10 under an object 40 (figure 7) to be lifted. As best shown in Figures 1, 2 and 8, the joint 16 is a raw element having a curved, external surface 16e, an internal curved surface 16f, an end of the shank 16a, a lever end 16b, a pair of sides 16c and 16d and a pair of legs 16g, 16h. The end of the shank 16a of the joint 16 is integrally coupled to the first end 12a of the shank 12 and the lever end 16b of the joint 16 is integrally coupled to the joining end 14a of the lever 14. The legs 16g and 16h of the joint 16 form substantially a V-configuration and these legs 16g and 16h form an angle a of 90 ° or greater .. The jig 10 may also comprise a curved, tapered bevel part 18. The bevel piece 18 generally has the shape of a wedge with an inner end 18b, an outer end 18a, an inner surface 18f, an outer surface 18e and sides 18c and 18d. The inner end 18b of the bevel piece is coupled to the second end 12b of the shank 12. The bevel piece 18 is tapered such that the inner end 18b is thicker than the outer end 18a. The bevel piece 18 is commonly curved in an outward direction. The bevel piece 18 can also be bent inwardly. Referring to Figures 7 and 8, the bar 10 is used when inserting the lever part 14 under the object 40 to be lifted in such a way that the outer surface 14e of the lever piece faces a support surface 100 and the inner surface 14f is facing the object 40. An intermediate portion P of the stem 12 is commonly contacted with a vertical surface V of the object 40 at a distance Ii from the supporting surface 40. A user 30 lifts the object 40 to the apply a force F to the bevel piece 18 attached to the rod 12. In this example, the force F is directed away from the object and is substantially perpendicular to the center line of the rod. The rod 12 acts as a moment arm and the lever part 14 acts as the other moment arm. The jumper 10 rotates when the force F is applied, causing the object 40 to rise in the direction u. The bar 10 initially rotates about a starting pivot point x located on the outer surface -16e at the intersection with the interface I. The operating moment arm of the bar 10 is the distance 2 between the force F and the pivot point x. Referring to Figure 8, when the force F is applied first, the pivot point is at x, which falls into the center line 12c of the stem 12 and is usually at an interface I where the lever end 16b of the joint 16 and the term T of the flat end 14a of the lever 14 meet. As shown in dotted lines in Fig. 8, with the counterclockwise rotation of the jib 10, the pivot point x moves along the outer surface 16e of the joint 16 towards the shank 12 to a point a.

SCOPE OF THE INVENTION The foregoing presents a description of the best mode contemplated for carrying out the present invention and the manner and process of manufacture and use therein, in such full, clear, concise and exact terms to enable any person experienced in the technique with which ex concerned manufacture and use this invention. However, the invention is susceptible to modifications and alternative constructions of those discussed above that are fully equivalent. Consequently, it is not the intention to limit the invention to the particular disclosed modalities. On the contrary, the intention is to cover all the modifications and alternative constructions that come into the spirit and scope of the invention as expressed in general by the following claims, which indicate in particular and distinctly claim the subject matter of the invention.

Claims (21)

1. CLAIMS 1. A utility bar characterized in that it comprises: an arched shank having a first end and a second end and a curved central line extending longitudinally between the first and second ends and a lever part at the first end facing inwards , the recessing part has a substantially flat and straight outer surface, the lever part and the shank are integral and joined by a joint that includes a curved outer surface that fuses with an outer end of the outer surface of the surface lever to define a starting position of a traveler pivot point, the starting position is inward of the cental line, the lever part and the stem form a substantially L-shaped configuration at the first end, where the line central is configured in the form of a portion of the circumference of a circle. The utility jig according to claim 1, wherein the substantially flat and straight outer surface of the lever part is at an angle of 90 ° or less with the center line. 3. The utility bar according to claim 1, characterized in that it includes a bevel part at the second end facing outwards. 4. Utility bar according to claim 1, characterized in that the connection is a substantially V-shaped element. The utility bar according to claim 1, characterized in that the lever part has a tapered edge. 6. A utility bar characterized in that it comprises: a lever part; an arched stem having a first end and a second end and a curved central line extending longitudinally between the first and second ends; a substantially V-shaped joint connecting the lever part and the shank to form a substantially L-shaped configuration at the first end-the V-shaped joint has a first leg that is coupled to the shank and a second leg for coupling to the lever part, wherein the angle between the first leg and the second leg is 90 ° or greater and the lever part and the V-shaped joint form an interface defining a starting portion of a traveling pivot point , the interface is inside the central line of the rod, where the central line is configured in the form of a portion of the circumference of a circle 7. The utility rod according to claim 6, characterized in that the lever part has a substantially flat and straight outer surface that is at an angle of 90 ° or less with the center line. The utilitarian jig according to claim 6, characterized in that it includes a bevel piece at the second end facing outwards. 9. Utility bar according to claim 6, characterized in that the lever part has an outer edge with leaves. A utility bar characterized in that it comprises: a lever part and an arched rod formed integrally from a single piece of metal and defining a lever hook substantially L-shaped; the arcuate stem has a longitudinally extending curved central line configured in the form of a portion of the circumference of a circle. 11. The utility bar according to claim 10, characterized in that the lever part and the rod are joined by a substantially V-shaped connection having a pair of legs defining an angle between them that is 90 ° or higher. The utility jig according to claim 11, characterized in that the V-shaped joint includes a curved external surface that fuses with an external end of an outer surface of the lever part to define a starting position of a point pivot traveler, the starting position is inside the central line. 13. Utility bar according to claim 12, characterized in that the outer surface of the lever part is at an angle of 90 ° or less than the center line. 14. A utility bar characterized in that it has: a substantially L-shaped configuration formed by a lever part having a substantially flat and straight outer surface and an arched shank having a longitudinal curved center line, the lever part and the shank arched together by a joining element including a curved outer surface extending between the lever part and the shank, the curved outer surface of the connecting element fuses with the flat and straight outer surface of the lever part to form a it was inferred that it defines a starting position of a traveling pivot point that is inward of the center line, the flat and straight outer surface of the lever part is at an angle of 90 ° or less with respect to the center line. 15. The utility bar according to claim 14, characterized in that the center line is configured in the form of a portion of the circumference of a circle. 16. Utility bar according to claim 14, characterized in that the rod has a substantially hourglass cross section configuration. 17. A utility bar characterized in that it comprises: a lever member and an arcuate rod formed integrally from a single piece of metal and defining a substantially L-shaped lever hook, the arcuate rod has a center line extending longitudinally curved and a substantially hourglass cross-sectional configuration, the lever part is at an angle of 90 ° or less with respect to the center line.18. The utility bar according to claim 17, characterized in that the center line is formed substantially in the form of a portion of the circumference of a circle. 19. Utility bar according to claim 17, characterized in that the lever part and the arcuate rod are joined together by means of a connecting element that includes a curved external surface that fuses with a flat and straight outer surface of the workpiece. lever to form an inferium that defines a starting position of a traveling pivot point that is inward of the center line. 20. Utility bar according to claim 19, characterized in that the outer surface of the lever part is at an angle of 90 ° or less with respect to the center line. 21. A utility bar characterized in that it comprises: a lever part and an arcuate rod formed integrally from a single piece of metal and defining a substantially L-shaped lever hook, the lever part has a substantially flat outer surface and straight, the arched shank has a substantially hourglass cross-sectional configuration and a longitudinally extending curved central line which is formed in the form of a portion of the circumference of a circle and the lever part and the arched shank are bonded together by a connecting element that includes a curved outer surface that fuses with the flat, straight outer surface of the lever piece to form an interface defining a starting position of a traveler pivot point that is inwardly the center line, the flat and straight outer surface of the lever part is at an angle of 90 or less with respect to the center line.