Patent Publication Number: US-10780556-B2

Title: Anti-slip, multidirectional driver bit

Description:
FIELD OF THE INVENTION 
     The present invention generally relates to various tools designed for tightening or loosening fasteners, in particular bolts and nuts. More specifically, the present invention is an anti-slip multidirectional driver bit, designed to prevent damaging or stripping fasteners during the extraction or tightening process. 
     BACKGROUND OF THE INVENTION 
     Hex bolts, nuts, screws, and other similar threaded devices are used to secure and hold multiple components together by being engaged to a complimentary thread, known as a female thread. The general structure of these types of fasteners is a cylindrical shaft with an external thread and a head at one end of the shaft. The external thread engages a complimentary female thread tapped into a hole or a nut and secures the fastener in place, fastening the associated components together. The head receives an external torque force and is the means by which the fastener is turned, or driven, into the female threading. The head is shaped specifically to allow an external tool like a wrench to apply a torque to the fastener in order to rotate the fastener and engage the complimentary female threading to a certain degree. This type of fastener is simple, extremely effective, cheap, and highly popular in modern construction. 
     One of the most common problems in using these types of fasteners, whether male or female, is the tool slipping in the head portion, or slipping on the head portion. This is generally caused by either a worn fastener or tool, corrosion, overtightening, or damage to the head portion of the fastener. The present invention is a driving bit design that virtually eliminates slippage. The design uses a series of segmented portions that bite into the head of the fastener and allow for efficient torque transfer between the driving bit and the head portion of the fastener. The present invention eliminates the need for the common bolt extractors as they require unnecessary drilling and tools. With the development of electric screwdrivers, and drills, people have been using, power tools to apply the required torsional forces and remove various fasteners. The present invention provides a double-sided driver end bit, thus allowing for torque to applied to the fastener in both clockwise and counterclockwise directions, thus tightening or loosening the fastener. Most driver end bits have a standardized one fourth inch hex holder and come in various configurations including but not limited to, square end, hex end, or star end. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the present invention. 
         FIG. 2  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 3  is a front view of the alternative embodiment of the present invention in  FIG. 2 . 
         FIG. 4  is a rear view of the alternative embodiment of the present invention in  FIG. 2 . 
         FIG. 5  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 6  is a bottom perspective of the present invention. 
         FIG. 7  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 8  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 9  is a front view of the alternative embodiment of the present invention in  FIG. 8 . 
         FIG. 10  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 11  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 12  is a perspective view of an alternative embodiment of the present invention. 
         FIG. 13  is a front view of a separate alternative embodiment of the present invention in  FIG. 2  where an entire cross-section of the engagement cavity as a triangular profile. 
         FIG. 14  is a rear view of the separate alternative embodiment of the present invention in  FIG. 2  where an entire cross-section of the engagement cavity as a triangular profile. 
     
    
    
     DETAIL DESCRIPTIONS OF THE INVENTION 
     All illustrations of the drawings are for the purpose of describing selected versions of the present invention and are not intended to limit the scope of the present invention. 
     The present invention generally related to torque tool accessories. More specifically, the present invention is a multi-grip screw bit, also known as a screw bit or driver. The present invention allows for a higher torque to be applied to a fastener than a similarly sized conventional driver bit without damaging the head of the fastener or the bit tool. This is achieved through the use of a multitude of engagement features which effectively grip the head of the fastener. The present invention is a screw bit that is compatible with a variety of torque tools including, but not limited to, traditional drills, bit-receiving screwdrivers, socket wrenches, and socket drivers. 
     In its simplest embodiment, referring to  FIG. 1 , the present invention comprises an at least one screw bit body  1  and an attachment body  19 . The screw bit body  1  is a shank which engages the socket fastener, such as a socket screw or a socket bolt, in order to apply a torque force onto the socket faster. The screw bit body  1  comprises a plurality of laterally-bracing sidewalls  2 , a first base  14 , and a second base  15 . In general, the screw bit body  1  is a prism composed of a strong metal. Each of the plurality of laterally-bracing sidewalls  2  engage within and grip the socket fastener in order to efficiently transfer torque from a torque tool to the socket fastener. The first base  14  and the second base  15  are positioned opposite to each other along the plurality of laterally-bracing sidewalls  2 . Additionally, the first base  14 , and thus second base  15 , is preferably oriented perpendicular to each of the plurality of laterally-bracing sidewalls and thus enclose/complete the prism shape of the screw bit body  1 . More specifically, it is preferred that the first base  14  comprises a first base surface  26 , wherein the first base surface  26  is flat and is oriented perpendicular to the bracing surface  5  of each of the plurality of laterally-bracing sidewalls  2 . 
     The attachment body  19  allows the present invention to be attached to an external torque tool and, thus, allow torque force to be applied to the socket fastener through the screw bit body  1 . The attachment body  19  is centrally positioned around and along a rotation axis  16  of the screw bit body  1  such that the rotation axis of the attachment body  19  and the rotation axis  16  of the screw bit body  1  are coincidentally aligned. Additionally, the attachment body  19  is connected adjacent to the second base  15 . The attachment body  19  preferably has a hexagonal cross-section in order to fit within a female attachment member of the external torque tool. External torque tools include, but are not limited to, electric drills, torque wrenches, pneumatic drills, socket screw drivers, and other similar torque tools. 
     Referring to  FIG. 3  and  FIG. 4 , each of the laterally-bracing sidewalls comprises a first lateral edge  3 , a second lateral edge  4 , a bracing surface  5 , and an at least one engagement cavity  8 . The plurality of laterally-bracing sidewalls  2  is radially positioned about the rotation axis  16  of the screw bit body  1  in order to yield a geometric profile complimentary to that of the socket fastener. The number within the plurality of laterally-bracing sidewalls  2  is subject to change to compliment the shape and profile of a variety of socket fasteners. In one embodiment of the present invention, the number within the plurality of laterally-bracing sidewalls  2  is six and the resulting geometric profile of the screw bit body  1  is a hexagon. In an alternative embodiment of the present invention, the number within the plurality of laterally-bracing sidewalls  2  is four. 
     The bracing surface  5  physically presses against the socket fastener, specifically against the lateral sidewall of a head portion from the socket fastener. The first lateral edge  3  and the second lateral edge  4  are positioned opposite to each other across the bracing surface  5 . When viewed from either the top perspective or the bottom perspective, the first lateral edge  3  and the second lateral edge  4  from each of the plurality of laterally-bracing sidewalls  2  make up the corners of the screw bit body  1 . The engagement cavity  8  extends normal and into the bracing surface  5  and creates an additional gripping point/tooth on the bracing surface  5 . Additionally, the engagement cavity  8  is positioned offset from the first lateral edge  3  by a first distance  21 . Resultantly, the gripping point is created by the engagement cavity  8  and the bracing surface  5 . In another embodiment, the gripping point is created by the engagement cavity  8  and an adjacent edge, wherein the adjacent edge is either the first lateral edge  3  or the second lateral edge  4 ; in particular, the adjacent edge is the edge closest to the engagement cavity  8 . Additionally, the engagement cavity  8  extends into the screw bit body  1  from the first base  14  towards the second base  15 . This ensures that the additional gripping point extends along the length of the screw bit body  1  for maximum grip engagement between the screw bit body  1  and the socket fastener. To further accomplish this, it is preferred that an entire cross-section  9  of the engagement cavity  8  is parallel to the first base  14  and the second base  15 . In one embodiment of the present invention, the engagement cavity  8  also tapers from the first base  14  to the second base  15  as seen in  FIG. 11 . Referring to  FIG. 3 , in one embodiment of the present invention, the entire cross-section  9  of the engagement cavity  8  is a partially-circular profile. Additionally, the partially-circular profile is concave along a direction from the first lateral edge  3  to the second lateral edge  4 . The partially-circular profile ensures that there are little to no high stress points in the screw bit body  1 , thus increasing the overall longevity of the tool. Referring to  FIG. 13  and  FIG. 14 , in a separate embodiment of the present invention, the entire cross-section  9  of the engagement cavity  8  is a triangular profile. Additionally, the triangular profile is concave along a direction from the first lateral edge  3  to the second lateral edge  4 . Alternative profiles may be used for the engagement cavity  8  including, but not limited to, a semi-square profile, a semi-rectangular profile, and a semi-oval profile. 
     In one embodiment of the present invention, referring to  FIG. 8  and  FIG. 9 , the entire cross-section  9  of the engagement cavity  8  comprises a curved portion  10  and a straight portion  11 . In this embodiment, the present invention is implemented as an extraction bit, wherein the present invention is designed to extract damaged or broken fasteners, damaged rods, broken studs, and other similar items. The engagement cavity  8  is uniquely shaped in order to form a sharp engagement tooth that grips in the corners of the socket fastener, allowing material from the internal sides of the fastener socket into the engagement cavity  8  and thus yielding a superior grip over traditional tools which are simply designed to push material away. This is especially true for worn or damaged fastener socket. More specifically, the curved portion  10  is a semi-circular curve that is positioned adjacent to the first lateral edge  3 . The straight portion  11  is positioned adjacent to the curved portion  10 , opposite the first lateral edge  3 . The straight portion  11  guides a portion of the socket fastener to press against the engagement tooth. As such, the straight portion  11  extends from the curved portion  10  to the second lateral edge  4 . Specifically, the straight portion  11  starts at the curved portion  10  and ends at the second lateral edge  4 . 
     In another embodiment of the present invention, referring to  FIG. 11 , the engagement cavity  8  is centrally position on the bracing surface  5 . In particular, the engagement cavity  8  is positioned offset from the second lateral edge  4  by a second distance  22 . For central positioning, the first distance  21  is equal to the second distance  22 . This positions the engagement cavity  8  to engage the internal lateral sidewall of the socket fastener for the most efficient transfer of torque with the least possibility of slippage. Additionally, this embodiment may be used to rotate the socket fastener in either the clockwise or the counter-clockwise direction. 
     In another embodiment of the present invention, the proportion between the first distance  21 , the second distance  22 , and the width of the engagement cavity  8  may be altered in order to achieve a dedicated clockwise or counterclockwise design. In one embodiment, the present invention is configured to be a clockwise drive bit. For this embodiment, the first distance  21  is greater than the second distance  22 . In particular, the proportion between the first distance  21 , the second distance  22 , and the width of the engagement cavity  8  is 1:5:4, thus yielding a design of the present invention which grips and applies torque to the socket fastener in the clockwise direction. This design is used to screw in and secure the socket fastener. In another embodiment, the present invention is configured to be a counter-clockwise screw bit. For this embodiment, the first distance  21  is greater than the second distance  22 . In particular, the proportion between the first distance  21 , the second distance  22 , and the width of the engagement cavity  8  is 5:1:4, thus yielding a design which grips and applies torque to the socket fastener in the counter-clockwise direction. This design is used to release and extract the socket fastener. 
     Referring to  FIG. 10 , the present invention may also be implemented in a spline/square bit design. In this embodiment, the screw bit body  1  is a spline-type bit body that transfers torque to the socket fastener through a multitude of protrusions. Specifically, the screw bit body  1  further comprises a plurality of intermittent sidewalls  24 . Each of the plurality of intermittent sidewalls  24  is a flat surface which engages the socket fastener like a traditional screw bit design. The plurality of intermittent sidewalls  24  is radially positioned about the rotation axis  16 . Additionally, the plurality of intermittent sidewalls  24  is interspersed amongst the plurality of laterally-bracing sidewalls  2 . The ratio between the plurality of laterally-bracing sidewalls  2  and the plurality of intermittent sidewalls  24  is subject to change to yield a variety of different screw bit designs. In one embodiment, the plurality of intermittent sidewalls  24  and the plurality of laterally-bracing sidewalls  2  radially alternate between each other. In another embodiment, there are three sidewalls from the plurality of intermittent sidewalls  24  in between each of the plurality of laterally-bracing sidewalls  2 . Resultantly, this configuration places an engagement feature/tooth at every other protrusion of the screw bit body  1 . 
     In another embodiment, referring to  FIG. 6 , the present invention further comprises an engagement bore  20 . The engagement bore  20  allows the present invention to be attached to a male attachment member of an external torque tool, such as a socket wrench or a screw driver. The engagement bore  20  extends into the attachment body  19  along the rotation axis, opposite the screw bit body  1 . The engagement bore  20  is shaped to receive a male attachment member of a socket wrench; the preferred shape is square as the majority of socket wrenches utilize a square attachment member. In this embodiment, the preferred attachment body  19  is cylindrical shaped. In alternative embodiments, the shape and design of the engagement bore  20  and the attachment body  19  may vary to be adaptable to different torque tool designs and different attachment means. 
     In one embodiment, referring to  FIG. 2 , the present invention is implemented as a dual sided screw bit, thus providing both a clockwise and a counter-clockwise configuration simultaneously in a single tool. In this embodiment, the at least one screw bit body  1  comprises a first screw bit body  17  and a second screw bit body  18 . The attachment body  19  preferably has a hexagonal cross-section. The attachment body  19  is centrally positioned around and along the rotation axis  16  of the first screw bit body  17  such that the rotation axis of the attachment body  19  and the rotation axis  16  of the first screw bit body  17   1  are coincidentally aligned. Additionally, the attachment body  19  is connected adjacent to the second base  15  of the first screw bit body  17 . The second screw bit body  18  shares the attachment body  19  with the first screw bit body  17 . Thus, the second screw bit body  18   1  is concentrically positioned with the first screw bit body  17 . Additionally, the second screw bit body  18  is positioned adjacent to the attachment body  19 , opposite the first screw bit body  17 , similar to traditional double-sided screw bit designs. Similar to the first screw bit body  17 , the attachment body  19  is connected to the second base  15  of the second screw bit body  18 . The first screw bit body  17  is designed to screw in a socket fastener, the clockwise configuration. For this, referring to  FIG. 3 , the second distance  22  of the first screw bit body  17  is greater than the first distance  21  of the first screw bit body  17 . This positions the additional gripping point of the first screw bit body  17  adjacent to the first lateral edge  3  of the first screw bit body  17 . The second screw bit body  18  is designed to unscrew/extract the socket fastener, i.e. the counter-clockwise configuration. Referring to  FIG. 4 , the first distance  21  of the second screw bit body  18  is greater than the second distance  22  of the second screw bit body  18   1 . This positions the additional gripping point of the second screw bit body  18  adjacent to the second lateral edge  4  of the second screw bit body  18 . 
     In another embodiment of the present invention, referring to  FIG. 5 , the at least one engagement cavity  8  comprises a first cavity  12  and a second cavity  13 . This embodiment is an alternative configuration which yields a clockwise and counter-clockwise configuration. In particular, the first cavity  12  and the second cavity  13  are oriented parallel and offset to each other. The first cavity  12  is positioned adjacent and offset to the first lateral edge  3  and the second cavity  13  is positioned adjacent and offset to the second lateral edge  4 . This allows the user to rotate the present invention either in the clockwise or counter-clockwise rotation without removing the present invention from the torque tool while still taking advantage of the additional gripping point(s). In this embodiment, it is preferred that the present invention further comprises the plurality of intermittent sidewalls  24 , wherein the plurality of intermittent sidewalls  24  is interspersed amongst the plurality of laterally-bracing sidewalls  2 . 
     Referring to  FIG. 7 , in an alternative embodiment, the present invention is implemented as a ball-end screw bit. In this embodiment, the bracing surface  5  for each of the plurality of laterally-bracing sidewalls  2  comprises a convex portion  6  and a concave portion  7 . The convex portion  6  and the concave portion  7  delineate a curved surface such that, overall, the plurality of laterally-bracing sidewalls  2  forms a ball-like shape. The convex portion  6  is positioned adjacent to the first base  14  such that the convex portion  6  from each of the plurality of laterally-bracing sidewalls  2  forms the body of the ball-like shape. The concave portion  7  is positioned adjacent to the convex portion  6 , opposite to the first base  14  such that the concave portion  7  from each of the plurality of laterally-bracing sidewalls  2  further forms the ball-like shape and provides clearance for when the screw bit body  1  is engaged to the socket fastener at an angle. The convex portion  6  and the concave portion  7  are oriented along the rotation axis  16  of the screw bit body  1 , and thus the length of the screw bit body  1 , to position the ball-like shaped terminally on the screw bit body  1 . It is preferred that the curvature, length, and height of the concave portion  7  and the convex portion  6  is identical. Additionally, it is preferred that the engagement cavity  8  extends along the whole length of the convex portion  6  and the concave portion  7 . Thus, additional gripping is provided along the screw bit body  1 , regardless of the angle between the socket fastener and the screw bit body  1 . 
     Referring to  FIG. 10 , in one embodiment, the present invention is implemented as a tamper-resistant screw bit. In particular, the present invention further comprises a pin-in security hole  23  which interlocks with a complimentary post within a unique socket fastener. Thus, a set of unique socket fasteners and a unique-key screw bit may be sold, utilized, or manufactured to ensure tamper proof design. This type of interlocking design is used for security reasons, preventing unauthorized personnel from accessing certain socket fasteners. The pin-in security hole  23  is concentrically positioned with the rotation axis  16  of the screw bit body  1 . Additionally, the pin-in security hole  23  extends into the screw bit body  1  from the first base  14 . The size, depth, and profile of the pin-in security is subject to change to meet the needs and specifications of the user. 
     In one embodiment, referring to  FIG. 11 , the present invention includes additional features in order to guide the screw bit body  1  into the socket fastener. In particular, a lateral edge  25  between the first base  14  and each of the plurality of laterally-bracing sidewalls  2  is chamfered which aids the user in interlocking the screw bit body  1  within the socket fastener. Referring to  FIG. 12 , in another embodiment, the present invention is implemented in a screwdriver design. In this embodiment, the screw bit body  1  is tapered from the second base  15  towards the first base  14 , similar to traditional screwdrivers. The degree of tapering is subject to change to meet the needs and requirements of the user. 
     In other embodiments, the present invention may be implemented in the form of a socket for tightening or loosening of bolts and other similar fasteners. For this, the screw bit body  1  is implemented as a cavity traversing into a cylinder, similar to traditional socket designs. 
     Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.