Patent Application
20110277530
In a principal aspect the present invention relates to a tool used to fasten items together, for example, to attach a strand of farm fence wire to a fence post by means of a metal clip.
Fencing may be attached to fence posts by fasteners such as staples, clips, ties, and the like. A common type of fence post is a steel T cross sectional shaped post which is designed to be driven into the soil or earth. Subsequently fencing wire, such as barbed wire, is attached to the T cross section fence post. Attachment may be effected in any of a number of ways. For example, metal ties may be utilized to attach the fence wire to the fence post. Another procedure is to clamp and form a U-shaped metal clip about the wire and post to thereby retain the fence wire tightly locked on to the post. The U-shaped metal clip may be crimped manually or by some tool to securely retain the fence wire attached to the steel fence post. When attaching a U-shaped metal clip to retain fence wire attached to a steel fence post, a worker may desire to use some type of tool that will provide a mechanical advantage necessary to bend and form the clip about the wire and post so that the clip will retain the fence wire on the post. The tool must be easy to manipulate and not overly bulky.
Additionally the clip must have a configuration which can be easily positioned and manipulated to fit around a length of fence wire as well as around at least a portion of the fence post to which the wire is to be attached. Further, the clip must be made of a material that maintains its configuration when it is formed about a fence post.
With these objectives, among others, in mind, the fence clip installation tool and associated clip of the present invention were developed.
Briefly, the present invention comprises a pliers type tool which includes a pair of manually actuated handles pivotally joined together at a generally intermediate pivot point. The inner end of each handle is also pivotally connected to an associated clip clamping jaw. The two jaws are also pivotally mounted to and between plates. The jaws also engage one another, for example, by engagement of meshed teeth, so that as a consequence the jaws will pivot with respect to each other in opposite rotational directions when actuated by the handles. Thus as the two handles are pivoted to a closed position about their pivotal connection, the jaws mounted between the plates will pivot toward one another and deform a clip retained between the jaws thereby enabling the clip to be fitted around and fasten a wire to a steel post.
The jaws thus counter-rotate as a result of their engaged gear teeth when they are pivoted about their respective pivot axis due to the movement of the handles of the tool. The jaws each include channels or depressions for engagement with the opposite ends of a U-shaped metal clip nested between the jaws and the plates. The plates, which are positioned on opposite sides of the pivoting jaws, serve to retain a clip in a position that enables the jaws to maintain a grip on the clip as the clip is formed or closed about items that are to be fastened together. The tool and associated clip may be used to fasten various items together in addition to wire and a steel post.
Thus it is an object of the invention to provide an improved fence clip installation tool.
It is a further object of the invention to provide a fence clip installation tool which is easily manipulated by manual operation.
Another object is to provide a tool which provides adequate mechanical advantage to deform a metal clip.
Another object of the invention is to provide a metal clip which in combination with an installation tool may be deformed and fastened about various objects.
Another object of the invention is to provide a metal clip that has a generally U-shaped configuration but is constructed so that it can be maintained in a clip installation tool during the installation operation using the tool.
Another object of the invention is to provide a clip installation tool into which a U-shaped metal clip may be easily inserted and retained in position during operation of the tool.
Yet another object of the invention is to provide a clip installation tool that enables clips to be retained and manipulated in a manner that ensures their ability to engage or attach two components such as fence wire and a fence post.
Another object of the invention is to provide a means for attaching fencing wire to steel fence posts that is less time consuming than by means of conventional wire ties.
Another object of the invention is to provide an inexpensive yet easily manipulated metal clip installation tool.
These and other objects, advantages and features of the invention will be set forth in the detailed description which follows.
In the detailed description which follows, reference will be made to the drawing comprised of the following figures:
a is a plan view of the installation tool;
b is a plan view of the installation tool with the jaws in the open condition prior to placement of a clip between the jaws;
Referring to the Figures, an installation tool is comprised of a generally elongate, straight first handle 20 and a substantially identical second handle 22. The handles 20, 22 are typically formed from a sheet metal material. The handles 20, 22 each include an outer distal end or section 24 and 26 respectively. The handles 20, 22 also each include an inner end with pivot openings 28 and 30 respectively for receipt of jaw connection pivot pins 31 and 33 therethrough. The handles 20, 22 are pivotally joined together by a intermediate pivot connection 32. As can be seen by reference to
Typically the handles 20 and 22 are joined together at the pivot connection 32 by a bolt 35 and lock nut 36 which, in combination, enable adjustment of the tension on the pivotal connection 32 between the handles 20 and 22. That is, a certain amount of friction is desired with respect to the pivotal connection 32 to ensure that the tension or resistance to rotation upon movement of the handles 20, 22 relative to one another is adequate to preclude jaws 38, 40 (described below) and handles 20, 22 from moving due to gravity when the tool is being used. Thus a clip 100, as described hereinafter, will be held in the jaws 38, 40 and will remain nested therein and will not inadvertently fall or be released from the tool. The tension connection 32 also reduces risk of an accidental pinching injury due to unexpected movement of the tool components. The bolt 35 and lock nut 36 also allow tension adjustment by the tool owner, if needed, to compensate for tool wear.
As set forth above the tool includes the first jaw 38 cooperatively engaged with the second jaw 40. The tool also includes a first plate 42 and a second plate 44 substantially identical to the first plate 42. The first and second plates 42 and 44 are attached by pivot pins 46 and 48 respectively, extending through pivot openings 50 and 52 of first and second jaws 38 and 40. Thus the first jaw 38 includes a pivot opening 50 and the second jaw 40 includes a pivot opening 52. Pivot pins 46, 48 extend through the openings 39 and 41 in plates 42 and 44 which are placed respectively on opposite sides of the jaws 38 and 40 to enable the jaws 38, 40 to pivot with respect to one another. Jaw 38 includes gear teeth 43 that cooperate with gear teeth 45 of jaw 40 so that the jaws 38 and 40 will counter-rotate or pivot in unison uniformly in opposite rotational senses or directions about the respective axes of their respective pivot openings 50 and 52.
The jaws 38 and 40 further comprise, respectively, pivot pins 31, 33 providing respectively a pivotal connection through pivot openings 60 and 62 to the openings 28 and 30 associated of the respective handles 20, 22. Thus as the handles 20 and 22 are moved between a closed and open position by pivotal movement about the pivot connection 32, the jaws 38 and 40 will uniformly move or rotate about the respective axes of their axial openings 50 and 52 and pins 46, 48.
Each of the jaws 38 and 40 further includes a formed clip drive engagement face 64 and 66 which is formed by a cold forming operation and which comprises a groove 65 and 67 in the respective clip engagement face 64 and 66. Thus ends 101, 103 of clip 100 connected by coplanar crown 105 are nested between the jaws 38 and 40 and positioned to engage the channels or grooves 65 and 67 during the closure of the jaws 38, 40. The ends 101, 103 are retained in the grooves 65, 67 so that the clip 100 can be properly formed about items to be joined such as fence wire 102 to a post 104.
Referring to
Referring to
The plates 42, 44 each include an arcuate cut out section and face 81 with a depending tang or tab 80 which engages against clip 100 to help retain clip 100 in place.
The various component parts comprising the tool are made or fabricated from flat metal sheet such as steel stock. The handles 20, 22 for example can be cut from flat stock and then formed into the configuration illustrated in
In the embodiment disclosed, the pins or connecting rivets, e.g. pins or rivets 46, 48, are shoulder rivets. The shoulder on the pins or rivets 46, 48 enables maintenance of a fixed distance between the plates 42, 44 so that the jaws 38, 40 may rotate freely without binding or pinching by the plates 42, 44 during assembly or use of the tool.
The clip, such as the clip 100, has a generally planar U-shape and is configured prior to deformation by the tool in a manner which fits between the plates 42 and 44 so that the tab 80 associated with the plates 42, 44 may appropriately engage the backside of the clip 100 to hold it in position as the clip 100 is deformed by movement of the jaws 38, 40. The jaws 38, 40 in the open position have a spacing or configuration which is just slightly more than that of the spaced opposite side ends or arms 101 and 103 of the open clip 100. The clip 100 is maintained in position in the tool by slight closing of the handles 20, 22 resulting in a very slight closing of jaws 38, 40 creating a slight compression force between the jaws 38, 40 and the clip 100. The tangs or tabs 80 of plates 42, 44 further provide some force which maintains the clip 100 in position within or between the jaws 38, 40 of the tool. The tabs or tangs 80 project generally parallel to the pivot axes of the tool elements e.g. pins 31, 33. Thus the configuration and dimensions of the clip 100 may be customized to be cooperative with the configuration and spacing of the jaws 38, 40 and the configuration of the plates 42, 44. The described assembly provides a kit comprised of the installation tool as well as the fastener clips 100 which enable the placement of the clips 100 about fence wire 102 and a fence post 104 or any other pair of items about which clips 100 may be attached.
While there has been set forth a preferred embodiment of the invention it is to be understood that the invention is limited only by the following claims and equivalents thereof. For example different materials may be utilized in the practice of the invention including non-metallic materials. The configuration of the described clips may be altered provided that the compatibility of the clips and the installation tool are maintained. The interactivity or means for inner engaging the jaws may be effected by equivalent means or structures other than gear teeth. The dimensions and positions of the various pivot axes and pivot connections may be altered or amended to provide for additional mechanical advantage for example. Various other engineering alterations may be incorporated without departing from the spirit and scope of the present invention.
