Electrical connectors – Contact comprising cutter – Insulation cutter
Reexamination Certificate
1999-04-22
2001-03-13
Donovan, Lincoln (Department: 2832)
Electrical connectors
Contact comprising cutter
Insulation cutter
C439S410000, C439S412000, C439S413000
Reexamination Certificate
active
06200157
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to plugs for connection of an electro-fluidic converter.
Electro-fluidic converters such as electro-pneumatic and electro-hydraulic converters, which convert an electrical input value into a fluid, for example pneumatic or hydraulic output value, and provided for this purpose with fluid valves actuated by electro magnets or piezo valves, are widely used in industrial control technology for power tools. The number of the converters required for a power tool control is very high and correspondingly increases the installation expenses, since all converters must be connected individually and thereby all converters must be manually contacted to connect them through control conduits with a central control device.
A known control device with two electro-fluidic, for example electro-hydraulic or electro-pneumatic converters arranged in a converter housing is disclosed for example in the German patent document DE 196 32 691 A1. It has a contacting device formed on the converter housing. A conductor portion with a two-wire connecting cable which serves for a current supply and transmission of control signals is inserted in a housing opening, and a clamping device is formed on a flappable housing cover. During pressing of the housing cover against the converter housing, a separating disk of the clamping device separates the connecting cable, and the pressing surfaces which press on the electrical conductors of both separated cable portions produce an electrical connection between the electrical conductors and the connecting contacts of an electric circuit. By means of this contacting unit, plurality of converters can be placed in a shortest time on the connecting cable and contacted.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a plug of the above mentioned type for connection of individual converters to a connecting cable which leads to a control unit, which is improved so that both the installation expense as well as the installation time for the device for the machine control can be reduced.
In keeping with these objects and with others which will become apparent herein after, one feature of present invention resides, briefly stated in a plug for connection of an electro-fluidic converter, in which the plug housing accommodates electrical counter contacts to converter plug contacts, electrical connecting means for a multi-wire, encased connecting cable, connecting means for electrical and electronic joining of the connecting means with the counter contacts, and a contacting device for connecting the connecting cable with the electrical connecting means, and the contacting device has a moveable cable receiving part for insertion of a cable portion as well as a clamping lever acting on the cable receiving part for producing contact of the cable portion against the connecting means.
The inventive plug for connection of an electro-fluidic converter has the advantage that the plug inside the plug housing is completely wired, and before or after the plugging on the plug contact of the converters without tools and fast it can provide the electrical connection to the connecting cable. For this purpose, the cable must be inserted in the movable cable receiving part and the clamping lever must be manually closed. The movability of the receiving part serves for an exact orientation of the cable without the danger of tilting during pressing of the clamping lever and guarantees in every place a reliable contacting of the connecting means with the cable wires. With closing of the clamping lever, the plug is connected both electrically to the connecting cable and also mechanically and in a spraying-water protected manner to the connecting cable. A mounting screw which is screwed on the converter housing passes through an opening in the plug housing. It serves for securing and prevents an unauthorized withdrawal or fall of the plug from the converter housing during or after the mounting, for example in the event of pull loading of the cable.
In accordance with a preferable embodiment of the invention, a centering projection cooperating with the clamping lever is provided on the cable receiving part. During turning on the cable receiving part the clamping lever is placed on the centering projection so that the clamping force produced by the clamping lever is transmitted centrally to the receiving part.
In accordance with a further preferable embodiment of the invention, the cable receiving part is arranged in a well formed in the plug housing. The electrical connecting means extend with the contact tips over the well bottom, and arresting openings are provided in the shaft well at a distance from the shaft bottom for engaging the arresting projections formed on the cable receiving part. The arresting connection formed by the arresting recesses and arresting projections is designed so that by the pressure force applied by the clamping lever on the cable receiving part the arresting projections exit the arresting recesses and the cable guiding part is released for displacement toward the well body. There the contact tips pass through corresponding throughgoing openings in the bottom of cable receiving part and extend in the cable so that the electrical conductors running in the cable are contacted.
In accordance with a further preferable embodiment of the invention, the contacting device has a separating disk for separation of the cable portion transversely to its extension. With the clamping lever acting on the cable receiving part, it passes through a slot formed in the bottom of the cable receiving part. This constructive design makes possible to contact with the one plug two converters integrated in one converter housing, or to separate the data input and the data output, and to connect the plug in a simple and time-saving manner to the connecting cable. Sealing contour surround each contact tip in the well base and provide in connection with the flexible cable installation a liquid-tight connection between the contact tips and the casing of the cable portion, so that no moisture can penetrate into the contact points.
REFERENCES:
patent: 5722852 (1998-03-01), Miek
patent: 40 20 791 C1 (1991-06-01), None
patent: 40 37 353 C1 (1992-03-01), None
patent: 93 05 574 (1993-07-01), None
patent: 93 18 648 (1994-03-01), None
patent: 44 00 114 A1 (1994-07-01), None
patent: 43 05 608 A1 (1994-08-01), None
patent: 196 32 691 A1 (1998-01-01), None
patent: 0 606 048 A1 (1994-07-01), None
patent: 0 664 402 A1 (1995-07-01), None
patent: 2 693 516 (1994-01-01), None
patent: 2 163 815 (1986-03-01), None
Ams Felix
Wegehingel Stefan
Asco Joucomatic GmbH & Co.
Donovan Lincoln
Lee Kyung S.
Striker Michael J.
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