Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Reexamination Certificate
2000-10-25
2002-06-11
Reichard, Dean A. (Department: 2831)
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
C174S068300
Reexamination Certificate
active
06403884
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a cable terminal or joint for electrically conductive connection of a preferably multi-core cable to an electrical device, or for electrically conductive connection of two preferably multi-core cables, with a cable terminal component and with a device terminal component or with the first cable joint component and a second cable joint component. In particular, the cable terminal component and the first cable joint component or the device terminal component or the second cable joint component include a union nut, a wire receiving and guiding part which has a plurality of wire guide channels, a clamping and terminal unit which is provided with insulation piercing connecting devices and with terminal elements, and a sleeve-like terminal body or connecting body which is provided with an outside thread which corresponds to the inside thread of the union nut, the wire ends which are to be squeezed by the insulation piercing connecting devices or which are to make contact with the insulation piercing connecting devices and the assigned insulation piercing connecting devices each running at an angle of less than 180° and the insulation piercing connecting devices cutting through the wire insulation of the wire ends and making contact with the conductors when the union nut is screwed onto the terminal body or the connecting body or when the terminal body or the connecting body is screwed into the union nut.
2. Description of Related Art
First of all, the meaning to be given to certain terms used in the following description are to have the following meanings:
a) The term cable stands for an electrical line which has at least one wire, but generally several wires, the cable being a multi-core cable if there are several wires, the totality of which is surrounded by electrical insulation; and
b) The wires of a cable mean an electrical conductor with wire insulation thereon.
It was also stated initially that the cable terminal is intended for electrically conductive connection of a cable to an electrical device. Here, an electrical device should be understood quite generally; in particular, the expression electrical device will also include electrical components, means and devices.
In terms of its basic structure, the cable terminal or joint means under consideration consists of a cable terminal component and a device terminal component, or of a first cable joint component and a second cable joint component. If it is a cable terminal, this includes a cable terminal component and a device terminal component. If it is a cable terminal joint, this includes a first cable joint component and a second cable joint component.
It was further stated initially that for the cable terminal or joint under consideration, the cable terminal component or the first cable joint component or the device terminal component or the second cable joint component includes the following
a union nut,
a wire receiving and guide part,
a clamping and terminal unit which is provided with insulation piercing connecting
devices and with terminal elements and
a sleeve-shaped terminal or connection body which is provided with an outside thread
which corresponds to the inside thread of the union nut.
Thus, first of all, it is intentionally left open which of the individual parts, i.e., union nut, wire receiving and guide part, clamping and terminal unit and terminal or connecting body belong to the cable terminal component or the first cable joint component or to the device terminal component or the second cable joint component. In this respect it should be added:
that the union nut generally belongs to the cable terminal component or the first cable joint component, but also an embodiment is conceivable in which the union nut includes the device terminal component and the second cable joint component,
that the wire receiving and guide part belongs to the cable terminal component or the first cable joint component,
that the clamping and terminal unit belongs to the device terminal component or the second cable joint component and
that the terminal or connection body generally belongs to the device terminal component and the second cable joint component, but also an embodiment is conceivable in which the terminal or connection body belongs to the cable terminal component or the first cable joint component, specifically especially when the union nut belongs to the device terminal component or the second cable joint component as is described below as one possible embodiment.
It was further stated at the beginning that the wire ends which are to be squeezed by the insulation piercing connecting devices or which are to make contact with the insulation piercing connecting devices and the assigned insulation piercing connecting devices run at an angle of less than 180°. This means, first of all, only that the wire ends and the assigned insulation piercing connecting devices do not run parallel to one another, because then the insulation piercing connecting devices cannot act on the wire ends in the proper manner. The angle between the wire ends which are to be squeezed by the insulation piercing connecting devices and which are to make contact with the insulation piercing connecting devices and the assigned insulation piercing connecting devices can be both an acute and also a right angle; nor is an obtuse angle precluded. Accordingly, the wire guide channels, which hold the wire ends and which are provided in the wire receiving and guide part, are angled relative to the insertion direction of the cable. However, in order to ensure simple deflection of the wire ends during insertion, the angle should be less than 90°.
Finally, it was stated initially that when the union nut is screwed onto the terminal or connecting body or when the terminal or connecting body is screwed into the union nut, the insulation piercing connecting devices cut the wire insulation of the wire ends and make contact with the conductors. Screwing the union nut onto the terminal or connecting body, or screwing the terminal or connecting body into the union nut, leads to relative motion between the wire receiving and guide part and the clamping and terminal unit, and thus, to relative motion between the wire ends and the insulation piercing connecting devices. This relative motion leads to the insulation piercing connecting devices cutting through the wire insulation of the wire ends and then making contact with the conductors.
If, for better understanding, but in no way restrictively, the cable terminal or joint under consideration is reduced to a cable terminal with preferred assignment of the individual components to the cable terminal component, on the one hand, and the device terminal component on the other, it is therefore a cable terminal for electrically conductive connection of a preferably multi-core cable to an electrical device, with one cable terminal component and with one device terminal component, the cable terminal component including a union nut and a wire receiving and guide part and the device terminal component including a clamping and terminal unit which is provided with insulation piercing connecting devices and with terminal components, and a sleeve-shaped outside terminal body which is provided with an outside thread which corresponds to the inside thread of the union nut, the wire ends which are to be squeezed by the insulation piercing connecting devices or to make contact with the insulation piercing connecting devices and the assigned insulation piercing connecting devices running at an angle of less than 180°, and when the union nut is screwed onto the terminal body, the insulation piercing connecting devices cutting through the wire insulation of the wire ends and making contact with the conductors.
The aforementioned individual parts, the wire receiving and guide part, the clamping and terminal unit and the terminal or connecting body will now be explained. The following explanation of these individual parts relates to the above addressed cable terminal
Estrada Angel R.
Phoenix Contact GmbH & Co.
Safran David S.
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