Abstract:
A multi-purpose tool and tool attachments have been described. The multi-purpose tool comprises a utility bar that has an elongated structural member partly covered by an overmold, and universal connectors on its two ends. The cross section of the elongated member is crossed-shaped and has a plurality of recesses, which helps to optimize the weight-to-strength ratio of the bar. The universal connectors are male and female snap-fit engagements that allow for different tool attachments to be quickly and easily attached to the ends of the bar in both a right-hand and left-hand orientation. The connectors also allow several utility bars to be connected in series to make a longer utility bar. The tool attachments comprise a handle-hammer-pick attachment, a shovel head counterweight, a spear head, an extractor attachment, a breaching tool attachment, and a monopod sniper attachment. Each tool attachment is designed to have multiple functions.

Description:
FIELD OF THE INVENTION 
       [0001]    The field of the invention is multi-purpose tools and tool attachments. 
       BACKGROUND 
       [0002]    The background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art. 
         [0003]    Various configurations of multi-purpose tools are known. U.S. Pat. No. 576,756, for example, discloses a “combination tool,” that has a bar with threaded ends and various tool attachments (e.g., spade, hammer, pick, hatchet, etc.) that can be threadably coupled to the ends of the bar. The interchangeable tool attachments advantageously provide multiple functions for the combination tool, thus reducing weight and space. Unfortunately, the threaded connectors of the combination tool do not allow for both a left-hand and a right-hand orientation of tool attachments because the threaded connectors are unidirectional. Moreover, the threaded connectors take time to attach and detach different tool attachments and do not always orient the tool attachments in a consistent manner (e.g., the T-union handle attachment may not always be oriented in plane with the spade attachment if either attachment is over rotated or if the threads are worn). It would be advantageous to provide a multi-purpose tool and tool attachments that can be used in a left-hand and right-hand orientation and that have quick-release fasteners for easily swapping out different tool attachments with the bar. 
         [0004]    Other examples of multi-purpose tools and tool attachments are found in U.S. Pat. Nos. 3,219,316, 4,700,420, 5,799,996, 6,671,913, 6,948,208, and 7,219,382. Also see US Patent Publication No. US 2010/0263133, which is the inventor&#39;s prior work. 
         [0005]    Unfortunately, these configurations and designs also suffer from one or more of the drawbacks discussed above. In addition, these references and many other known configurations for multi-purpose tools and tool attachments have very limited function. For example, a spade attachment typically will have just one function (e.g., shovel) and a hammer attachment typically will have just two functions (e.g., hammer and nail remover). In addition, the bar itself typically does not server any function other than as a handle or connector for attaching different tool attachments. It would be advantageous to provide a multi-purpose tool in which each tool attachment has a plurality of different and unrelated functions and in which the bar itself serves multiple functions. 
         [0006]    It would also be advantageous to provide a design for a utility bar that optimizes the following characteristics: (i) light weight; (ii) compact; (ii) high strength; (iii) multiply utilities. These objectives are particularly important in applications such as emergency rescue (e.g., fire fighters, law enforcement), mountaineering/backpacking/camping, military, and aerospace, since weight and space are very limited. 
         [0007]    These objectives are optimized to some extent in US Patent Publication No. 2012/0098282 (the &#39;282 Publication), which is the inventor&#39;s own work. In particular, the &#39;282 Publication describes a utility bar that has an elongated structural member covered by an overmold. The elongated member is light weight and has very high strength (e.g., flexural strength, fracture toughness, hardness, etc.), due, in part, to its cross sectional shape and staggered recessed portions. The overmold provides a comfortable gripping surface that helps to absorb shock forces. While the utility bar described in the &#39;282 Publication is advantageous in many aspects, it would be beneficial to provide additional utility bar designs and configurations that further optimize these objectives. 
         [0008]    All publications identified herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply. 
         [0009]    Thus, there is still a need for improved multi-purpose tools and tool attachments. 
       SUMMARY OF THE INVENTION 
       [0010]    The inventive subject matter provides apparatus, systems and methods in which a multi-purpose tool comprises a utility bar with universal connectors at each of its two ends. The universal connectors allow for different tool attachments to be quickly and easily attached to the bar, in both a left-handed and a right-handed configuration. The bar is made of an elongated structural member that is covered by an overmold. In some embodiments, the elongated structural member is made of a metal allow. The overmold is made of a softer material, such as a rubber, which helps to absorb shock/impact forces and is more comfortable to grip. 
         [0011]    In one aspect of some embodiments, the elongated member has a plurality of recesses to provide for mechanical engagement with the overmold. The recesses and cross-shaped cross-sectional area of the elongated member also help to improve strength-to-weight ratio of the utility bar. 
         [0012]    In another aspect of some embodiments, the universal connectors of the utility bar are male and female connectors/fasteners. In such embodiments, one end of the bar has a male protrusion that is sized and dimensioned to fit into, and lock with, a female cavity on the other end of the bar. This allows for multiple utility bars to be connected in series. The cross sectional shape of the male protrusion (and female cavity) can be shaped to allow for tool attachments to be coupled with the bar in both a right-hand and left-hand orientation. For example, the cross section can be a circular or oval shape with two flat opposing sides (e.g., double D-shaped). 
         [0013]    The inventive subject matter provides apparatus, systems and methods in which handle attachment comprises a t-shaped member having a handle portion and a stem portion. The stem portion extends from the handle portion. The handle portion has a blunt end for hammering and a pointed end for picking. The handle portion also has one or more through holes that provide attachment points and which help to reduce the weight of the handle attachment. 
         [0014]    In one aspect of some embodiments, pointed end is longer than the blunted end to provide additional leverage for picking and prying. In other aspects of some embodiments, the handle portion is curved downward (e.g., concave towards the stem portion) to provide better ergonomics for gripping when used as a handle. 
         [0015]    The stem portion of the handle attachment has a universal connector that can be used to quickly and easily couple the handle attachment to the utility bar described above. In some embodiments, the stem portion may also have one or more through holes that can be used as attachment points. 
         [0016]    The inventive subject matter provides apparatus, systems and methods in which a helmet counterweight for counterbalancing a helmet attachment (e.g., night vision goggles, etc.) on a helmet is designed to induce minimal stress on the user&#39;s neck. In one aspect, the reduced neck stress is achieved by distributing the mass of the counterweight across a larger surface area of the helmet. By spreading the mass across a larger surface area, the moment of force (e.g., torque) vectors (relative to the user&#39;s neck) are also spread out. This helps to reduce stress on the user&#39;s neck, in part because the spread out vectors cancel or reduce one another. In another aspect of the inventive subject matter, the reduced neck stress is achieved by the counterweight&#39;s low profile, which reduces the distance of the mass to the neck. By keeping the mass closer to the user&#39;s neck, the torque on the neck is also reduced. The counterweight can include a hook and loop fastener on its underside surface so that it can be removably and repositionably attached to the helmet. In addition, the counterweight includes two or more universal connectors for coupling a utility bar in two distinct configurations. 
         [0017]    The inventive subject matter provides apparatus, systems and methods in which a multi-purpose spear tool attachment can provide users (e.g., military, firefighters and rescue personnel) with a convenient multi-tool for various tasks. Contemplated systems and methods include a spear tool attachment having a first end portion and a second end portion. The first end portion has a point, and the second end portion has a universal connector. The spear tool attachment further comprises an intermediate portion between the first end portion and the second end portion. The intermediate portion has a stepped opening having a plurality of steps that define a plurality of distinct widths. It should be appreciated that the plurality of distinct widths allow the spear tool attachment to engage a ⅝ inch, ½ inch, 7/16 inch, ⅜ inch, and 5/16 inch hex nut and a rectangular-shaped shutoff value. The stepped opening also has a first side and a second side that intersect near at an acute angle near the first end portion. 
         [0018]    The inventive subject matter provides apparatus, systems and methods in which a multi-purpose extractor tool attachment can provide users with various functionalities (e.g., prying, twisting, punching, striking, etc.). Contemplated systems and methods include an extractor tool attachment having a first segment and a second segment having a universal connector. The first segment and the second segment meet at a first angle (e.g., 10°) for optimal prying, striking or twisting. Moreover, the tool has a width that narrows from the second segment to the first segment. In addition, the tool attachment has two wings to strike, chop, chisel, poke, and the like. 
         [0019]    The inventive subject matter provides apparatus, systems and methods in which a breaching tool attachment comprises a t-shape member that has a head portion and stem portion extending from the head portion. The head portion has a blunt end for hammering and a claw end for removing nails and/or prying. The head portion also includes one or more through holes that function as attachment points and that help to reduce the weight of the breaching tool attachment. In some embodiments, the claw end comprises two fingers that meet to form a v-notch. The stem portion of the breaching tool attachment includes a universal connector that mates with a utility bar. The stem portion may also include one or more through holes that serve as attachment points. In other aspects of some embodiments, the head portion has a recess on the right side and a recess on the left side. 
         [0020]    The inventive subject matter provides apparatus, systems and methods in which an adaptor attachment comprises a mounting platform and a universal connector extending from a side of the mounting platform. The universal connector can be coupled with a utility bar to provide a mounting platform that can be used to attach other devices such as flashlights, cameras, and guns. The mounting platform can include a flat surface for resting other devices. The mounting platform may also include bolts, holes, attachment points, and other features that facilitate attachment of another device. 
         [0021]    The inventive subject matter provides apparatus, systems and methods in which a cutting device attachment comprising two sharp-edged components that are rotatably coupled. Each sharp-edge component has a universal connector that mates with one of the connectors of a utility bar. When a utility bar (or series of utility bars) is coupled to each sharp-edge component, the combination can be used as a cutting tool. 
         [0022]    Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         [0023]      FIG. 1  is a perspective view of one embodiment of a multi-purpose utility bar. 
           [0024]      FIG. 2  is a top view of the bar of  FIG. 1 . 
           [0025]      FIG. 3  is a bottom view of the bar of  FIG. 1 . 
           [0026]      FIG. 4 a    is a left side view of the bar of  FIG. 1 ., the right side view being a mirror image. 
           [0027]      FIG. 4 b    is a close-up perspective view of the end the bar of  FIG. 1 , with a double detent spring mechanism. 
           [0028]      FIG. 4 c    shows the bar and double detent spring mechanism of  FIG. 4 b   , the end of the bar shown as transparent to better illustrate the spring mechanism. 
           [0029]      FIG. 5  is a cross section view taken along line A-A of  FIG. 2 . 
           [0030]      FIG. 6  is a cross section view taken along line D-D of  FIG. 2 . 
           [0031]      FIG. 7  is a cross section view taken along line E-E of  FIG. 2 . 
           [0032]      FIG. 8 a    is a perspective view of multiple utility bars connected in series. 
           [0033]      FIG. 8 b    is a close up, cross sectional view taken along line A-A in  FIG. 8   a.    
           [0034]      FIG. 9  shows one embodiment of a carrying apparatus, which utilizes the utility bar of  FIG. 1 . 
           [0035]      FIG. 10  shows one application for the utility bar of  FIG. 1 . 
           [0036]      FIG. 11  shows one embodiment of a gurney, which utilizes the utility bar of  FIG. 1 . 
           [0037]      FIG. 12  shows the gurney of  FIG. 11  being used by military personnel. 
           [0038]      FIG. 13  shows one embodiment of a stint, which utilizes the utility bar of  FIG. 1 . 
           [0039]      FIG. 14  is a perspective view of the overmold of the utility bar of  FIG. 1 . 
           [0040]      FIG. 15  is a perspective view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0041]      FIG. 16  is a top view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0042]      FIG. 17  is a right side view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0043]      FIG. 18  is a bottom view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0044]      FIG. 19  is a left side view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0045]      FIG. 20  is a back view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0046]      FIG. 21  is a front view of the elongated structural member of the utility bar of  FIG. 1 . 
           [0047]      FIG. 22  is a cross section view taken along line A-A of  FIG. 16 . 
           [0048]      FIG. 23  is a cross section view taken along line B-B of  FIG. 16 . 
           [0049]      FIG. 24  is a cross section view taken along line C-C of  FIG. 17 . 
           [0050]      FIG. 25  is a cross section view taken along line E-E of  FIG. 16 . 
           [0051]      FIG. 26  is a cross section view taken along line F-F of  FIG. 16 . 
           [0052]      FIG. 27  is a cross section view taken along line G-G of  FIG. 16 . 
           [0053]      FIG. 28  is a top perspective view of one embodiment of a handle attachment. 
           [0054]      FIG. 29  is a bottom perspective view of the handle attachment of  FIG. 28 . 
           [0055]      FIG. 30  is a front view of the handle attachment of  FIG. 28 . 
           [0056]      FIG. 31  is a right side view of the handle attachment of  FIG. 28 , the left side being a mirror image. 
           [0057]      FIG. 32  is a back view of the handle attachment of  FIG. 28 . 
           [0058]      FIG. 33  is a top view of the handle attachment of  FIG. 28 . 
           [0059]      FIG. 34  is a cross section view taken along line A-A of  FIG. 31 . 
           [0060]      FIG. 35  is a cross section view taken along line B-B of  FIG. 31 . 
           [0061]      FIG. 36  is a front view of the handle of  FIG. 28  in combination with a grapple attachment. 
           [0062]      FIG. 37  is a perspective view of the utility bar of  FIG. 1  in combination with the handle attachment of  FIG. 28  and the counterweight attachment of  FIG. 40 . 
           [0063]      FIG. 38  is a perspective view of the tool of  FIG. 37 , wherein the handle is attached to the utility bar in a right-handed configuration. 
           [0064]      FIG. 39  is a perspective view of the tool of  FIG. 37 , wherein the handle is attached to the utility bar in a left-handed configuration. 
           [0065]      FIG. 40  is a back, perspective view of a helmet with a shovel head counterweight attached to the helmet. 
           [0066]      FIG. 41  is a side view of a person wearing the helmet and counterweight of  FIG. 40 . 
           [0067]      FIG. 42  is a top view of the counterweight of  FIG. 40 . 
           [0068]      FIG. 43  is a bottom view of the counterweight of  FIG. 40 . 
           [0069]      FIG. 44  is a left side view of the counterweight of  FIG. 40 . 
           [0070]      FIG. 45  is a front view of the counterweight of  FIG. 40 . 
           [0071]      FIG. 46  is a back view of the counterweight of  FIG. 40 . 
           [0072]      FIG. 47  is a cross section view taken along line A-A of  FIG. 46 . 
           [0073]      FIG. 48  is a close-up perspective view of the counterweight of  FIG. 40  attached to the utility bar of  FIG. 1  in a digging configuration. 
           [0074]      FIG. 49  is a close-up perspective view of the counterweight of  FIG. 40  attached to the utility bar of  FIG. 1  in a scooping configuration. 
           [0075]      FIG. 50  is a close-up perspective view of the counterweight of  FIG. 40  attached to the utility bar of  FIG. 1  in a standing monopod configuration. 
           [0076]      FIG. 51  is a perspective view of one embodiment of an spear tool attachment. 
           [0077]      FIG. 52  is a top view of the spear tool attachment of  FIG. 51 . 
           [0078]      FIG. 53  is a right side view of the spear tool attachment of  FIG. 51 . 
           [0079]      FIG. 54  is a back view of the spear tool attachment of  FIG. 51 . 
           [0080]      FIG. 55  is a cross section view along line A-A of  FIG. 52 . 
           [0081]      FIG. 56  is another top view of the spear tool attachment of  FIG. 51 , showing hex nut sizes that fit inside stepped opening of the spear tool attachment. 
           [0082]      FIG. 57  is a perspective view of the spear tool attachment of  FIG. 51  in combination with a utility bar and handle attachment. 
           [0083]      FIG. 58  is a perspective view of one embodiment of an extractor tool attachment. 
           [0084]      FIG. 59  is a front view of the extractor tool attachment of  FIG. 58 . 
           [0085]      FIG. 60  is a back view of the extractor tool attachment of  FIG. 58 . 
           [0086]      FIG. 61  is a side view of the extractor tool attachment of  FIG. 58 . 
           [0087]      FIG. 62  is a top view of the extractor tool attachment of  FIG. 58 . 
           [0088]      FIG. 63  is a cross section view along line A-A of  FIG. 62 . 
           [0089]      FIG. 64  is a cross section view along line B-B of  FIG. 62 . 
           [0090]      FIG. 65  is a perspective view of the extractor tool attachment of  FIG. 58  in combination with a utility bar and a handle attachment. 
           [0091]      FIG. 66  is a perspective view of one embodiment of a breaching tool attachment. 
           [0092]      FIG. 67  is a left side view of the breaching tool attachment of  FIG. 66 . 
           [0093]      FIG. 68  is a top side view of the breaching tool attachment of  FIG. 66 . 
           [0094]      FIG. 69  is a bottom view of the breaching tool attachment of  FIG. 66 . 
           [0095]      FIG. 70  is a front view of the breaching tool attachment of  FIG. 66 . 
           [0096]      FIG. 71  is a right side view of the breaching tool attachment of  FIG. 66 . 
           [0097]      FIG. 72  is a back view of the breaching tool attachment of  FIG. 66 . 
           [0098]      FIG. 73  is cross section view along line A-A of  FIG. 71 . 
           [0099]      FIG. 74  is cross section view along line B-B of  FIG. 72 . 
           [0100]      FIG. 75  is cross section view along line C-C of  FIG. 74 . 
           [0101]      FIG. 76  is a perspective view of the breaching tool of  FIG. 66  in combination with a utility bar. 
           [0102]      FIG. 77  is a perspective view of one embodiment of an adaptor attachment. 
           [0103]      FIG. 78  is a bottom view of the adaptor attachment of  FIG. 77 . 
           [0104]      FIG. 79  is a top view of the adaptor attachment of  FIG. 77 . 
           [0105]      FIG. 80  is a front side view of the adaptor attachment of  FIG. 77 , the back side view being a mirror image. 
           [0106]      FIG. 81  is a right side view of the adaptor attachment of  FIG. 77 , the left side view being a mirror image. 
           [0107]      FIG. 82  is a perspective view of the adaptor attachment of  FIG. 77  in combination with a utility bar. 
           [0108]      FIG. 83  is a perspective view of the adaptor attachment of  FIG. 77  in combination with a utility bar and a rifle. 
           [0109]      FIG. 84  is a perspective view of one embodiment of a cutter tool attachment in combination with two utility bars. 
           [0110]      FIGS. 85-93  show schematics with dimensions for one embodiment of a utility bar, handle attachment, spear attachment, extractor attachment, and breaching tool attachment. 
       
    
    
     DETAILED DESCRIPTION 
       [0111]    The following description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art. 
         [0112]    The following discussion provides many example embodiments of the inventive subject matter. Although each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed. 
         [0113]      FIG. 1  is a perspective view of a multi-purpose utility bar  100 . Bar  100  has an elongated structural member  102  and an overmold  104  covering part of member  102 . Bar  100  also has a first universal connector  106  and a second universal connector  108 . In addition, bar  100  has a plurality of through holes  110 . 
         [0114]      FIG. 2  is a top view of the bar of  FIG. 1 . Bar  100  has an end portion  114 , end portion  116 , and a middle section  118  between end portions  114 ,  116 . 
         [0115]    Connector  106  is located on end portion  114  and comprises a protrusion. Connector  108  is located on end portion  116  and comprises a cavity  122  (see  FIG. 5 ). The protrusion is sized and dimensioned to fit inside cavity  122 . In particular, the protrusion has a double D cross sectional shape (see  FIG. 21 ) comprising two opposing rounded sides and two opposing flat sides. Cavity  122  has a similar cross sectional shape. This shape allows the protrusion to fit into cavity  122  in two different orientations that are 180 degrees apart, which allows non-symmetrical tool attachments (e.g., handle attachment  300 ) to be coupled with bar  100  in a left-handed and right-handed configuration. 
         [0116]    The top view of  FIG. 2  also shows recess  120 . Recess  120  is a flat surface that has two holes, which can be used to attach other devices to bar  120 , such as a flashlight or camera. 
         [0117]      FIG. 3  is a bottom view of the bar of  FIG. 1  and shows recess  112 . Recess  113  is a flat surface that can be used to attach a sharpening stone or some other tool. In some embodiments, sharpening stones of different grades (coarse, medium, fine) can be removably coupled with recess  112  via hook and loop fasteners. 
         [0118]      FIG. 4 a    is a left side view of the bar of  FIG. 1 , the right side view being a mirror image. The plurality of through holes  110  is clearly shown in this view. Holes  110  help to reduce the weight of bar  100 . Holes  110  can also be used as attachment points to fasten straps or other devices to bar  100 . In some applications, a rigid member (e.g., ladder rung) can be placed in the holes  110  of two parallel utility bars  110  to form a ladder. 
         [0119]      FIG. 4 b    is a close-up perspective view of the end the bar of  FIG. 1 , with a double detent spring mechanism  184 . A spring biases the opposing ball detents, which allows connector  106  to snap into the through hole  109  of female connector  108 . The double detents lock the male and female connectors together in a quick and easy manner. Male connector  106  can be released (detached) from female connector  108  by pressing/pushing the detents (e.g., the double buttons) in (e.g., compressing the spring). The ball detents are sized and dimensioned to fit into either opening of through hole  109  (i.e., either side of bar  100 ) such that male connector  106  mate with connector  108  in two different configurations (e.g., left-hand and right-hand configurations, separated by a 180 degree rotation). In  FIG. 4 c    the end  114  of bar  100  is transparent, which best illustrates the double-detent spring mechanism  184 . In some embodiments, the double detent spring mechanism  184  is made of stainless steel and the spring is sized and dimensioned to provide a high-strength mechanical connection. 
         [0120]      FIG. 4 c    also shows a picatinny rail attachment  189  attached to recess  120 . 
         [0121]      FIG. 5  is a cross section view taken along line A-A of  FIG. 2  and illustrates how overmold  104  mechanically locks into the recessed  124  (see  FIG. 17 ) on elongated member  102 .  FIG. 5  also shows the dimensions of cavity  122 . Cavity  122  has a depth that is parallel to the longitudinal axis of bar  100 . 
         [0122]      FIG. 6  is a cross section view taken along line D-D of  FIG. 2 .  FIG. 6  shows how location D-D on bar  100  has a cross sectional shape of a cross. This view also shows how bar  100  (with overmold  104 ) has a double D cross sectional shape. 
         [0123]      FIG. 7  is a cross section view taken along line E-E of  FIG. 2 . This view illustrates how the through holes  110  extend through the entire diameter of bar  100 . It also illustrates the cross sectional shape of elongated member  102  at located E-E, showing the recesses  124 . 
         [0124]      FIG. 8 a    is a perspective view of multiple utility bars connected in series. Since bar  100  has a male connector on one end and a female connector on another end, multiple bars  100  can be connected in series. This provides greater leverage and additional uses of bar  100 . 
         [0125]      FIG. 8 b    is a close up, cross sectional view taken along line A-A in  FIG. 8 a   , showing mechanism  184  coupling two utility bars  100   a  and  100   b.    
         [0126]      FIG. 9  shows one embodiment of a carrying apparatus  200 , which utilizes a plurality of bars (e.g., bar  100   a ,  100   b , etc) to carry a load  210 . 
         [0127]      FIG. 10  shows one application for a plurality of utility bars (e.g., bar  100   a ,  100   b , etc.). 
         [0128]      FIG. 11  shows a gurney  300 , which utilizes a plurality of utility bars (e.g., bar  100   a ,  100   b , etc.). 
         [0129]      FIG. 12  shows gurney  300  being used by military personnel. 
         [0130]      FIG. 13  shows a stint  400 , which utilizes a plurality of utility bars (e.g., bar  100   a ,  100   b , etc.). Straps  410  and  420  are wrapped around an injured person&#39;s leg and through the through holes on the utility bars. 
         [0131]      FIG. 14  is a perspective view of overmold  104  separated from elongated member  102 . Overmold  104  can be made of a softer material than member  102  to provide comfortable gripping and shock absorption. In some embodiments, overmold  104  is made of a reinforced thermoplastic pipe (RTP) material, such as thermoplastic Polyolefin Elastomer (TEO), RTP 2800 B-55A FR. Overmold  104  is preferably flame retardant and rated up to 180 F or more and down to −30 F or lower. Overmold  104  can also be resistant to chemicals such as gun solvents. In other aspects of some embodiments, overmold  104  can be made of a glowing material that charges in the sun and glows for up to 8 hours or more at night. Overmold  104  also has a plurality of frictional elements  105  for improving grip. 
         [0132]      FIG. 15  is a perspective view of elongated structural member  102  separated from overmold  104 . Member  102  has a plurality of recesses  124  that help to provide mechanical engagement with overmold  104 . The plurality of recesses  124  include longer recesses (see  FIG. 16 ) and shorter recess (see  FIG. 17 ) alternating around the sides of elongated member  102 . 
         [0133]    In addition to providing mechanical engagement with overmold  104 , recesses  124  also help to reduce the weight of bar  100 . 
         [0134]    Various portions of middle section  118  of elongated member  104  have a smaller diameter than the overall diameter of bar  100 . These smaller-diameter sections have a cross sectional shape of a cross, as best seen in  FIG. 27 . 
         [0135]      FIG. 16  is a top view of elongated structural member  102 . 
         [0136]      FIG. 17  is a right side view of elongated structural member  102 , and illustrates through holes  110 . 
         [0137]      FIG. 18  is a bottom view of elongated structural member  102 . 
         [0138]      FIG. 19  is a left side view of elongated structural member  102 . 
         [0139]      FIG. 20  is a back view of elongated structural member  102 , showing cavity  122  of universal connector  108 . 
         [0140]      FIG. 21  is a front view of elongated structural member  102 , showing universal connector  106 . 
         [0141]      FIG. 22  is a cross section view taken along line A-A of  FIG. 16 . This cross section view shows the dimensions of cavity  122 . This view also shows how the plurality of recesses  124  includes longer recesses and shorter recesses on different sides of member  102 . 
         [0142]      FIG. 23  is a cross section view taken along line B-B of  FIG. 16 , and shows the profile of through holes  110 . 
         [0143]      FIG. 24  is a cross section view taken along line C-C of  FIG. 17 , and shows the profile of through hole  107 . 
         [0144]      FIG. 25  is a cross section view taken along line E-E of  FIG. 16 , and shows the profile of through hole  107  from another perspective. 
         [0145]      FIG. 26  is a cross section view taken along line F-F of  FIG. 16 . This cross section view shows recesses  112  and  120 , in addition to through hole  110 . 
         [0146]      FIG. 27  is a cross section view taken along line G-G of  FIG. 16 , and shows how middle section  118  has a cross-shaped cross section at this location, with recesses  124  at all four ends of the cross. At other locations along middle section  118 , the cross only has two recesses (on two adjacent ends of the across). 
         [0147]      FIG. 28  is a top perspective view of handle attachment  300 . Handle  300  is t-shaped and has a handle portion  310  and stem portion  320  that extends perpendicular to the handle portion  310 . In other embodiments, stem portion  320  could extend at an angle (other than 90 degrees) from handle portion  310 .  FIG. 29  is a bottom perspective view of handle  300  and illustrates the features of universal connector  305  on stem portion  320 . Universal connector  305  is similar to connector  106  except that it also has a hex nut socket  307 . 
         [0148]      FIG. 30  is a front view of handle  300 . 
         [0149]      FIG. 31  is a right side view of handle  300 . Handle portion  310  has a blunt end  312  and a pointed end  314 . Blunt end  212  has a blunt surface  315  with a plurality of teeth. Handle portion  310  also has three through holes that help to reduce weight and serve as attachment points. Stem portion  320  also has two recesses that reduce weight and serve as attachment points. Handle portion  310  is curved slightly downward to provide an ergonomic grip when used as a handle. In addition, handle portion  310  meets stem portion  320  at two rounded surfaces—one on underside of blunt end  312  and the other on the underside of pointed end  314 —which also provide a comfortable ergonomic grip. 
         [0150]    The underside of blunt end  312  also has a sharp edge  391 , which can be used as a spanner wrench. The underside of pointed end  314  has a plurality of teeth for repelling, rock climbing, and gripping. Stem portion  320  has through holes  318 , which can be used as attachment points. Holes  318  can also be used as a tie down for a tourniquet. 
         [0151]      FIG. 32  is a back view of handle  300 . Pointed end  314  forms a point  316  for picking and prying. 
         [0152]      FIG. 33  is a top view of handle  300 . 
         [0153]      FIG. 34  is a cross section view taken along line A-A of  FIG. 31 . This view shows through hole  306  of universal connector  305 . This view also shows socket  307 . 
         [0154]      FIG. 35  is a cross section view taken along line B-B of  FIG. 31 . This view shows another perspective if through hole  306 . Through hole  306  can have a double detent spring mechanism placed therein for snap fitting into a female connector, as discussed above. 
         [0155]      FIG. 36  is a front view of handle  300  in combination with a grapple attachment  370 . Together, handle  300  and grapple attachment  370  can be used as a grappling hook. Grapple attachment  370  has two angled wings, each with a plurality of inward facing protrusions. 
         [0156]      FIGS. 37 and 38  show how handle  300  can attach to bar  100  in a left-handled orientation ( FIG. 37 ) and right handed orientation ( FIG. 38 ). 
         [0157]      FIG. 39  is a perspective view of the tool of  FIG. 37 , wherein the handle is attached to the utility bar in a left-handed configuration. 
         [0158]      FIG. 40  is a back, perspective view of a helmet  405  with shovel head counterweight  400  attached to the helmet. 
         [0159]      FIG. 41  is a side view of a person  415  wearing helmet  405 . Counterweight  400  counterbalances the weight of night vision goggle unit  410  relative to the person&#39;s neck. 
         [0160]      FIG. 42  is a top view of counterweight  400 . Counterweight  400  has two universal connectors  401 ,  404  for attaching bar  100 . Counterweight  400  also has a corrugated edge  402  and a notch  403 , which provide additional functionality. 
         [0161]      FIG. 43  is a bottom view of counterweight  400 . Hook and loop fasteners can be attached to this surface so that counterweight  400  can be removably and repositionably attached to helmet  405 . 
         [0162]      FIG. 44  is a left side view of counterweight  400 . 
         [0163]      FIG. 45  is a front view of counterweight  400 . 
         [0164]      FIG. 46  is a back view of the counterweight of  FIG. 40 . 
         [0165]      FIG. 47  is a cross section view taken along line A-A of  FIG. 46 , showing universal connector  404  and  401 . 
         [0166]      FIG. 48  is a close-up perspective view of counterweight  400  attached to utility bar  100  in a digging configuration. 
         [0167]      FIG. 49  is a close-up perspective view of counterweight  400  attached to utility bar  100  in a scooping configuration. 
         [0168]      FIG. 50  is a close-up perspective view of counterweight  400  attached to utility bar  100  in a standing monopod configuration. 
         [0169]    Shovel head counterweights are described in further detail in co-owned US International Patent Application Serial no. PCT/US14/44466, which is incorporated herein by reference. 
         [0170]    In another aspect, the inventor contemplates a spear tool attachment for multi-purpose use. The spear tool attachment comprises a first end portion, an intermediate portion, and a second end portion. The first end portion typically comprises a point (i.e., a tapered, sharp end of a tool). The second end portion comprises a universal connector that is sized and dimensioned to engage a utility bar (e.g., the utility bar described above). By engaging a utility bar, it should be appreciated that a user will gain additional leverage to use the spear tool. The intermediate portion comprises a stepped opening having a plurality of steps that define a plurality of widths. It is contemplated that the plurality of widths can be used to engage several different sized hex nuts and a rectangular shut off valve. Therefore, several advantageous features are gained by the spear tool attachment. 
         [0171]      FIG. 51  shows an embodiment of a spear tool attachment  500 . Spear tool attachment  500  comprises a first end portion  502  having a point  504 . In addition, spear tool attachment  500  has a second end portion  505  having a universal connector  506 . An intermediate portion  508  comprises a stepped opening  510  that is an opening is disposed in the middle of spear tool attachment  500 . However, it should be contemplated that stepped opening  510  can be disposed another position (e.g., closer to the front, side, or back of spear tool attachment  500 ). Intermediate portion  508  also comprises a recessed portion  509  that forms a v-shaped recess  511  on a top surface of spear tool attachment  500  concentric with a profile of the first end portion and intermediate portion. 
         [0172]    First end portion  502  can include a third side  520  and a fourth side  522  each having a plurality of teeth  518  as shown in  FIG. 52 . Teeth  518  can be used to provide friction for various prying and chiseling activities. Although spear tool attachment  500  has teeth are disposed on both sides of first end portion  502 , it is contemplated that other spear tool attachments comprise teeth on only one side or no teeth on either side. For example, a spear tool attachment can have teeth on one side and a sharpened blade on the other side so that the teethed side of the first end portion  502  can be used for prying, and the sharpened blade side of first end portion  502  can be used for cutting. 
         [0173]    As mentioned above, first end portion  502  typically comprises point  504 . Point  504  is a tapered, sharp end of spear tool attachment  500 . By providing this sharpened structure, it is contemplated that spear tool attachment  500  can be utilized with a utility bar to form an assault spear for military personnel. While spear tool attachment  500  uses point  504 , it is contemplated that other structures can be utilized, such as a curved structure and a rectangular structure. 
         [0174]    When viewed from a top view, first end portion  502  can meet intermediate portion  508  at an obtuse angle as shown by spear tool attachment  500 . Indeed, unlike typical spears that simply narrow in a straight line to a point, spear tool attachment  500  gradually narrows in tool width in intermediate portion  508  and then the tool width sharply narrows in first end portion  502  to provide an angular shape. Typically, the intermediate portion width that narrows from second end portion  505  to the first end portion  502 . 
         [0175]    It should be appreciated that the angular shape provides a broader region in intermediate portion  508  for chopping and a narrow region in first end portion  502  for picking or chiseling. For example, spear tool attachment  500  can be used for rocking climbing to pry into a crack in a rock to create an attachment point. The plurality of teeth  518  will help to hold attachment  500  in place in the crack by providing addition friction. It is also contemplated that first end  502  and intermediate portion  508  have a sharp edge  516  as shown in  FIG. 57  for various functions, such as slicing, chiseling or cutting. 
         [0176]    Returning to  FIG. 56 , intermediate portion  508  has a stepped opening  510  having a plurality of steps that define a plurality of distinct widths  513 . The plurality of steps is disposed on a first side  512  and a second side  514  of stepped opening  510 . Plurality of distinct widths  513  is typically defined as a dimension from first side  512  to second side  514  as shown in  FIG. 56 . While first side  512  and second side  514  are both shown to be stepped, it is contemplated that only one side is stepped and the other is flat or linear. Moreover, preferred embodiments include a gradual reduction in the size of the steps and/or width between the steps as shown in  FIG. 56  to provide better engagement with different sized nuts (e.g., hex nuts). First side  512  and a second side  514  intersect at an acute angle near first end portion  502  to provide various functionalities, such as a nail puller and a wire cutter/stripper. It should be appreciated that other angles (e.g., right or obtuse) are contemplated. 
         [0177]    Spear tool attachment  500  also comprises second end portion  505  having a universal connector  506 . Universal connector comprises a through hole  525  and a cavity  532 .  FIGS. 54 and 55  show a back view and a cross-sectional view of A of spear tool attachment  500 . Through hole  525  can be perpendicular to cavity  532 , such that the opening of cavity  532  is disposed in a horizontal direction and the opening of through hole  525  is disposed in a vertical direction. Moreover, universal connector  506  can be cylindrically-shaped. In preferred embodiments, universal connector  506  is sized and dimensioned to engage a utility bar (e.g., the utility bar described above). 
         [0178]      FIG. 56  shows the various nuts that spear tool attachment  500  can engage. Plurality of distinct widths  513  can be sized and dimensioned to engage a ⅝ inch (hexagon  1  in  FIG. 56 ), ½ inch (hexagon  2  in  FIG. 56 ), 7/16 inch (hexagon  3  in  FIG. 56 ), ⅜ inch (hexagon  4  in  FIG. 56 ), and 5/16 inch hex nut (hexagon  5  in  FIG. 56 ). Furthermore, the stepped opening is further sized and dimensioned to engage a rectangular-shaped shutoff value (dotted rectangular shape), such as standard oxygen tank, E/D cylinders and gas related delivery systems. It should be noted that engagement to a nut or a shutoff valve can be accomplished by contacting two sides of the nut or valve or all sides (e.g., surrounding the corners of the rectangle in  FIG. 56 ) of the nut or valve. 
         [0179]    As shown in  FIG. 56 , the plurality of steps comprises a first stepped side  512  and a second stepped side  514  that is opposite to first stepped side  512  relative to the longitudinal axis of the intermediate portion. Moreover, spear tool attachment comprises a pair of opposing right-angle notches  526  near (i.e., closer to the second end portion) second end portion  505  and separated by a first width  536 . First width  536  of pair of opposing right-angle notches  526  can equal to one of the plurality of distinct widths  534  to allow engagement to a rectangular shutoff valve (dotted rectangular shape in  FIG. 56 ). 
         [0180]    Spear tool attachment  500  can be composed of many suitable materials so long as it is rigid and strong to provide some of the various functionalities described above. For example, the first end portion, intermediate portion, and second end portion can be made of stainless steel. 
         [0181]    Furthermore, spear tool attachment  500  can be used as a sundial by laying tool attachment on the ground and drawing a circle around it. The contours of spear tool attachment provide a shadow that gives a user an approximation of the time. 
         [0182]      FIG. 57  shows that spear tool attachment  500  can be used with utility bar  100  and handle  300  to provide a spear. As noted above, a universal connector can be used to couple utility bar  100  and spear tool attachment  500 . In another aspect, the inventor contemplates an extractor tool attachment. 
         [0183]      FIG. 58  shows an exemplary embodiment of an extractor tool attachment  600  having a first segment  602  and a second segment  604  having a universal connector  606 . First segment  602  comprises a notch  608  on a front edge and a plurality of teeth  610  on top and bottom surfaces of the tool attachment. Extractor tool attachment can be used to pry, twist, punch, or strike walls, floors, and roofs. First segment  602  comprises notch  608  on a front edge, which divides the front edge into smaller regions for prying small areas. First segment  602  further includes plurality of teeth  610  (i.e., teeth grooves or textured portion) that provide a grip for various functions (e.g., prying). For example, a user can use extractor tool attachment  600  with a utility bar to pry a window open by using plurality of teeth  610  to grip a surface between the window frame and window so that the user can pull the window open. While extractor tool attachment  600  has plurality of teeth  610  on the top and bottom surfaces of first segment  602 , it is contemplated that plurality of teeth are disposed on either the top surface or bottom surface of the tool attachment. 
         [0184]      FIGS. 59 and 60  are a front and back view of extractor tool attachment  600  showing various features that were described above.  FIG. 61  shows a side view of extractor tool attachment  600 . It should be noted that first segment  602  and second segment  604  meet at an angle  603 . In preferred embodiments, angle  603  is 10° to provide maximum leverage. However, other angles are contemplated, such 0°, 5°, 15°, 20° and other suitable angles that provide leverage for prying, twisting, punching, or striking walls, floors, and roofs. Furthermore, first segment  602  and second segment  604  can have a sharp edge along a first side, which will allow for various additional features (e.g., cutting, slicing, prying, etc.). 
         [0185]    Extractor tool attachment  600  typically comprises a first wing  611  and a second wing  612  in second segment  604  as shown in  FIG. 62 . First and second wings  611  and  612  (e.g., ears) are disposed on opposite sides of a universal connector  606 . It should be appreciated that first and second wings  611  and  612  form two points (i.e., tapered, sharp end) on opposite ends of the extractor tool attachment  600 . The two points allow a user to pull objects once extractor tool attachment  600  has breached an object. For example, a user can poke a holes through the roof of a house using extractor tool attachment  600  and pull the shingles down to provide ventilation of the house during a fire. 
         [0186]    Second segment  62  a cylindrically-shaped end portion, which is part of universal connector  606 . First wing  611  forms an acute angle  616  relative to a longitudinal axis of the cylindrically-shaped end portion. However, other angles (e.g., right and obtuse) are also contemplated. 
         [0187]    Viewed from  FIG. 62 , it should be appreciated that a tool width that narrows from the second segment to the first segment. The tool width can be defined the distance between the tip of first wing  611  to the tip of second wing  612 . Viewed from the top perspective of  FIG. 62 , the tool width tapers as it approaches the front edge of first segment  602 . 
         [0188]    Universal connector  606  comprises a cavity  607  and a through hole  609  that is perpendicular to the depth of the cavity.  FIG. 63  shows a cross section of a portion of universal connector  606  showing cavity  607  and through hole  609 . As shown, cavity  609  has a depth that is parallel to a longitudinal axis of extractor tool attachment  600 . Preferred embodiments include a universal connector that is sized and dimensioned to engage a utility bar (e.g., the utility bar described above). 
         [0189]    Extractor tool attachment  600  can be composed of many suitable materials. For example, the first and second segments can be made of stainless steel. Polymers and other rigid materials are also contemplated as long as they can provide prying, twisting, punching, or striking functions. 
         [0190]      FIG. 64  is a cross section view along line B-B of  FIG. 62  and shows cavity  607 . 
         [0191]      FIG. 65  shows extractor tool attachment  600  in combination with utility bar  100  and handle attachment  300 . 
         [0192]      FIG. 66  is a perspective view of a breaching tool attachment  700 . Tool  700  as a handle portion  705  and a stem portion  710 . 
         [0193]      FIG. 67  is a left side view of breaching tool attachment  700 . Handle portion  705  has a blunt end  707  and a claw end  709 . Stem portion  710  has a universal connector  729  and a through hole  725 . 
         [0194]      FIG. 68  is a top side view of breaching tool attachment  700 . The top surface has a plurality of teeth  713  to provide frictional engagement. Claw end  709  has two fingers  721 ,  722  that meet to form a v-notch  712 . Fingers  721 ,  722  also have a space that has notches  711 . 
         [0195]      FIG. 69  is a bottom view of breaching tool attachment  700 . The bottom surface has plurality of teeth  715 . In addition, fingers  721 ,  722  each have a recess. Universal connector  729  has an annular recess  728 . 
         [0196]      FIG. 70  is a front view of breaching tool attachment  700 . Blunt end  707  of handle  705  has a blunt surface  717  with a plurality of teeth. 
         [0197]      FIG. 71  is a right side view of the breaching tool attachment  700 . Blunt end  707  has a sharp edge  706  on its underside surface, which can be used as a spanner wrench. The underside of blunt end  707  also has a recess  708  that can be used as a tool. Handle portion  705  also has a through hole  720 , which can be used as an attachment point. Hole  720  also helps to reduce the weight of breaching tool attachment  700 . 
         [0198]      FIG. 72  is a back view of breaching tool attachment  700 . The backside of stem portion  710  has a notch  730 . The backside of fingers  721 ,  722  have sharp edges  723 ,  724 , respectively. 
         [0199]      FIG. 73  is cross section view along line A-A of  FIG. 71 , showing the profile of the through hole  726  of universal connector  729 . 
         [0200]      FIG. 74  is cross section view along line B-B of  FIG. 72 , showing through hole  726  of universal connector  729 . 
         [0201]      FIG. 75  is cross section view along line C-C of  FIG. 74 , showing the cross sectional shape (e.g., double d) of connector  729 . 
         [0202]      FIG. 76  is a perspective view of breaching tool  700  in combination with utility bar  100 . 
         [0203]      FIGS. 77 to 81  show various views of an adaptor attachment  800 . Attachment  800  has a universal connector  805  that can attach to an end of bar  100 . Attachment  800  also has a mounting surface  815  and a protrusion  810  for mounting devices (e.g., camera, shooting bracket, rifle, flashlight, etc.). Platform  815  has a plurality of through holes that serve as attachment points and decreases weight of adaptor attachment  800 . 
         [0204]      FIG. 82  shows adaptor attachment  800  in combination with utility bar  100 . 
         [0205]      FIG. 83  shows adaptor attachment  800  in combination with utility bar  100 , being uses as a rifle mount monopod. 
         [0206]      FIG. 84  shows a cutter tool attachment that has two blades rotatably coupled together. Each blade component has a universal connector  910 ,  920  that removably couples with bar  100 . 
         [0207]      FIGS. 85-93  show schematics with dimensions for one embodiment of a utility bar, handle attachment, spear attachment, extractor attachment, and breaching tool attachment. 
         [0208]    In some embodiments, the numbers expressing quantities of properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements. 
         [0209]    Unless the context dictates the contrary, all ranges set forth herein should be interpreted as being inclusive of their endpoints and open-ended ranges should be interpreted to include only commercially practical values. Similarly, all lists of values should be considered as inclusive of intermediate values unless the context indicates the contrary. 
         [0210]    As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise. 
         [0211]    The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention. 
         [0212]    Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims. 
         [0213]    As used herein, and unless the context dictates otherwise, the term “coupled to” is intended to include both direct coupling (in which two elements that are coupled to each other contact each other) and indirect coupling (in which at least one additional element is located between the two elements). Therefore, the terms “coupled to” and “coupled with” are used synonymously. 
         [0214]    It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C . . . . and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.