Joints and connections – Shrunk fit
Patent
1992-04-03
1994-12-13
Reese, Randolph A.
Joints and connections
Shrunk fit
403282, 403274, 403 23, 29515, B60S 100, F16B 400
Patent
active
053724496
DESCRIPTION:
BRIEF SUMMARY
INTRODUCTION
The present invention relates to a wiper system for motor vehicles comprising at least one wiper bearing and/or one motor carrier member which according to its operational function is connectable to the one end of a pipe-like carrier.
BACKGROUND OF THE INVENTION
Wiper systems of the kind mentioned above normally consist of several pre-formed members provided with coloured varnish, which members are operatively linked to each other. Thereby the members firmly connectable to each other during operation can be soldered, screwed or connected by crimping. The latter way of connection is used in wiper systems especially often and advantageously because thus the desired connections can be realized particularly quickly, securely and at low costs. However, a disadvantage is that the connecting areas, when being crimped, are confronted with forces which may damage the varnish so that the protection against corrosion of the varnish is lost.
BRIEF DESCRIPTION OF THE INVENTION
Presupposing the prior art mentioned above, the object of the invention is to develop the wiper system without inappropriate constructive effort in such a way that sufficient protection against corrosion of the connecting areas is given even then, when these connecting areas are produced by deforming the carrier.
The object is achieved according to the invention by providing at least the connecting section between the wiper bearing as yell as the carrier and/or the carrier as well as the motor carrier member with a medium impermeable coating.
It can be seen that the invention is realized in any case then, when certain connecting sections of the wiper system which are formed by deforming at least the carrier, are provided with protection against corrosion taking over the function of the varnish. Of course, covering the connecting sections is also of an advantage in case of carriers that are only galvanized or protected otherwise without varnish because, when deforming the carrier, the protecting surface layer is damaged.
Therefore the invention also takes into consideration that the connecting area, the varnish of which has been damaged, is provided with new varnish.
Further useful and advantageous embodiments of the invention can be gathered from the subclaims.
In case of a wiper system with a pipe-like carrier which is connectable to a stud of the wiper bearing and/or of the motor carrier member, it is useful, if the coating consists of a plastic skin which can form- and force-fittingly be connected to the connecting section. It is of an advantage that the coating extends the end of the carrier and thus prevents water, oil, dust etc. from penetrating between the stud and the carrier. Then the connection is also protected from the inside.
In order to produce an operative connection between the studs and the carrier, another useful embodiment of the invention provides that the studs comprise recesses, for example cuts or notches, and that the carrier can be connected via the studs in the area of the recesses by crimping, that is by pressing the carrier into the recesses of the stud. Within this inventive idea it is of a special advantage, if the studs comprise at least two recesses each. Of course, such connections are not only restricted to wiper systems. The important idea of this embodiment of the invention can be used with respect to all these connections, in which quick and secure connections are to be realized by deforming at least one member.
Another useful embodiment shows that the studs are connectable with the carrier by plug-in connections.
The stability and the operative connection between the different members of such a wiper system can further be improved by the fact that the carrier as well as the studs are of an approximately round cross-section, whereby the inner diameter of the carrier is slightly bigger than the outer diameter of the respective stud.
It has been of a special advantage, if the coating consists of a heat shrinkable plastic tube. By taking these measures not only the connecting section, but also
REFERENCES:
patent: 2487512 (1949-11-01), Berger
patent: 3425719 (1969-02-01), Burton
patent: 3811367 (1974-05-01), Bimba
patent: 3848325 (1974-11-01), Bimba
patent: 4624879 (1986-11-01), Van Dijck
patent: 4693501 (1987-09-01), Logsdon, Jr. et al.
Bauer Kurt
Schmid Eckhardt
Knight Anthony
Lewis J. Gordon
Reese Randolph A.
Seitter Robert P.
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