Compound tools – Electrical connection forming or wire preparation
Reexamination Certificate
2000-01-11
2001-01-16
Scherbel, David A. (Department: 3723)
Compound tools
Electrical connection forming or wire preparation
C029S03300H, C029S758000
Reexamination Certificate
active
06173466
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to pliers-type hand tools and more particularly to a pair of pliers suitable for forming telephone line connectors in a convenient and effective manner.
2. Description of Related Art
Conventionally, a telephone line connector includes a body, a plurality of metal conductors in one side of the body, and a line inserted in from the opposing side of the body and which is in electrical contact with the metal conductors. An engagement piece is provided for securing the metal conductors to the body and fastening the electrical contact with the line. A common practice, after line has been inserted in the body, is to use a tool to insert the metal conductors guided by the engagement piece, into the body to press on the line. As a result, the line is secured to the body and the electrical contact is fastened.
Such a tool for achieving the above is shown in FIG.
1
. This conventional pair of pliers is known as pliers for forming electrical connectors. The pliers includes a pair of parts wherein the upper portion forms a jaw, the lower portion forms a pair of handles; and a pivot joint pivotably joins the upper and lower portions. The jaw has a central engagement member and a connector recess above the engagement member for receiving a connector. The handles may approach or move away from each other a predetermined distance by pressing. The engagement member may move into or away from a connector recess accordingly. As such, the engagement member may press the engagement piece into the body of the connector to secure the line to connector. The connector pressing direction in such pliers is perpendicular to the hand applying force on the handles so as to facilitate the work. Generally, workers use their right hands to grasp the handles to hold the pliers in about a vertical direction, and use their left hands to put the connector into the connector recess. Then, the line in the connector. Finally, force is applied on the pliers to conduct a pressing action. However, the engagement piece is positioned downwardly if the pliers is in about a vertical direction. This can block the worker's view. Thus, improvement is needed.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a pair of pliers suitable for forming electrical connectors in a convenient and effective manner.
The advantages of the present invention are realized by providing a pair of pliers for forming electrical connectors comprising a body, one or more connecting members, a sliding block, and a pliers arm pivotably joined together. The body includes a jaw, a handle extended from the jaw to form an angle therebetween, a recess within the jaw, and a plurality of connector cavities in communication with the recess for receiving the connectors. The sliding block provided in the recess includes an engagement portion slidable with respect to the recess. The pliers arm has a top cam member that is pivotably secured to the jaw. The connecting members are interconnected between the sliding block and cam member. As such, the pliers arm is operable to pivot about the handle which in turn moves the sliding block through the pivotal movement of the cam member and the linear movement of the connecting member so as to move the engagement portion into connector cavities to press on the connectors. Moreover, a convenient work position is achieved because the connector pressing direction in the connector cavities is parallel to the force applied to the hand and the inserting of the connectors into the connector cavities can be seen when working.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 4713874 (1987-12-01), Schwartz
patent: 4754636 (1988-07-01), Kautz et al.
patent: 4981032 (1991-01-01), Chen
patent: 4986106 (1991-01-01), Gwo-Jiang
patent: 5109591 (1992-05-01), Hung
patent: 5168592 (1992-12-01), Jee
patent: 5992002 (1999-11-01), Hung
Danganan Joni B.
Rabin & Champagne, P.C.
Scherbel David A.
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