Electrical connectors – Metallic clamp-type connector for storage battery terminal – Deformable c- or u-clamp
Patent
1996-12-18
1998-04-14
Bradley, P. Austin
Electrical connectors
Metallic clamp-type connector for storage battery terminal
Deformable c- or u-clamp
439763, H01R 442
Patent
active
057385521
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention derives from a battery terminal.
BACKGROUND OF THE INVENTION
Such a two-layer battery terminal is known from the U.S. Pat. No. 5,302,143. The connection of a battery cable to the one-piece battery terminal is possible with the aid of a crimp which is also constructed in two-layers. Such a connection is able to withstand mechanical stresses and enables good current transmission. However, the battery terminal is not suited for the connection of additional users, as a corresponding connecting element is not available.
A two-layer battery terminal of this kind is known from U.S. Pat. No. 4,747,793. The connection area of this battery terminal has a threaded bolt, the fixed seat of which is provided by the embedding of the square head in the two-layered terminal. The manufacture of this single connection element requires a large amount of technical processing. Furthermore the battery terminal is suitable only for the connection of ready-made cables, wherein only one of the two layers is contacted directly. The permanence of the contact between the contact part of the cable and the battery terminal depends on the quality of the screw connection. If the nut loosens, e.g. because of operational vibrations, the single contact is made at only some points. No appropriate connection elements are provided for the connection of additional items of equipment, so that further connections would be possible only by increasing the transition resistances at the threaded bolt. The battery terminal is fixed to the battery pole by means of a screw connection, which reduces the size of the appropriate location hole. Manipulation of the components of this screw connection is made more difficult by the individuality of nut, washer and threaded bolt.
A two-layer battery terminal is also known from WO 92/11667. The cable is connected to the terminal by a crimp connection. An additional consumer may be pushed onto a projecting tongue. The disadvantage with this connection technique is that the contact can easily by loosened. When repair work is being carried out in the engine compartment, forces may be exterted, unnoticed, on the additional cable, causing the connection to be loosened. The terminal is fixed to the battery pole by the inclination of two pressed location holes with the aid of a nut and a screw, which are mounted movably to the terminal.
A battery with additional connection elements is known from U.S. Pat. No. 3,407,383. The main connection is made by means of a clamp, whereby a cable with two screws is squeezed between two metal plates. The additional connections are designed to project out from the battery terminal so that ready-made cables can be attached to them, preferably with wing nuts. Alternatively the locking screw for securing the battery terminal on the battery pole has an interior hole, into which a further screw can be inserted for securing additional cables. This connection technique requires a great deal of work so that it is not practicable for a fitter to handle this terminal, as there is very little space in the engine compartment of a motor vehicle because of the large number of pieces of equipment.
Furthermore it is known from EP 0569064 A1 that a two-layer crimp can be used to fix a cable to a contact part. A tongue projects into a single layer crimp and is squeezed together with the cable, to improve current distribution into the individual areas of the contact part.
The invention derives from the task of designing a battery terminal on the basis of the precharacterizing part of claim 1 in such a way that it is suitable for the connection of several items of equipment, while optimizing electrical and mechanical features, simplifying the manufacturing process and increasing ease of installation.
SUMMARY OF THE INVENTION
The subject matter of claim 1 has the advantage that the battery terminal creates good current transfer properties to all connection elements, and at the same time is easy to manipulate, because the stability of the terminal, in particular
REFERENCES:
patent: 2935726 (1960-05-01), Raymond
patent: 3407383 (1968-10-01), Haegert
patent: 3409865 (1968-11-01), Shannon
patent: 3739322 (1973-06-01), Haegert
patent: 3893744 (1975-07-01), Porazinski
patent: 4747793 (1988-05-01), Fukuda et al.
patent: 5492780 (1996-02-01), Okada
Gutenschwager Rainer
Halbach Paul Gerhard
Bradley P. Austin
Brooks Cary W.
Delphi Automotive Systems Deutschland GmbH
Ta Tho D.
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