Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1991-01-14
1994-07-12
Coe, Philip R.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525007, 1505005, 1525034, 392480, 219202, 239133, 239135, 239134, 2392251, 239264, B60S 146, B60S 134
Patent
active
053276140
DESCRIPTION:
BRIEF SUMMARY
INTRODUCTION
The invention relates to a windshield cleaning system, especially for motor vehicles.
BACKGROUND OF THE INVENTION
Windshield cleaning systems are already known, in which for the purpose of improving the effect of the washing system the washing liquid is supplied to jets which are arranged on the wiper arm-and-blade assembly and move in pendulum motion with it. In such an embodiment known from the AT-PS 3 13 083 the washing liquid is supplied through a bore in a wiper shaft, whereby for heating the washing liquid a resistance wire is inserted into the bore. Thereby resistance wire is loosely embedded into the washing liquid channel formed by the bore in the wiper shaft and consequently is in direct contact with the washing liquid so that the electric conductor must be perfectly isolated. The schematic illustration in this publication indicates that apparently these resistance wires are integrally realized from the voltage source up to the heating elements near the jet. This makes it much more difficult to assemble or dismount the wiper arm belonging to the wiper arm-and-blade assembly to or from the wiper shaft.
BRIEF DESCRIPTION OF THE INVENTION
The object of the present invention is to develop a windshield cleaning system of the sort mentioned at the beginning with a heating device for the washing liquid in such a way that the windshield cleaning system can easily be assembled and afterwards, if necessary, the wiper arm can also easily be exchanged.
Thereby the invention is based on the idea that the connection between the battery and a heating element located on the wiper arm for the jet is separated at certain points and is to be replaced by plug connections. Therefore in the embodiment according to the invention the electric conductor within the bore of the wiper shaft is anchored on a pipe forming the actual washing liquid channel, whereby the pipe extends the ends of the wiper shaft by way of at least one end portion, preferably, however, by way of two end portions. A contact web each connected with the conductor is fixed onto these end portions, by way of which contact web a detachable counter contact piece can be contacted. Thus a wiper shaft has been assigned to its own conductor which can be separated from the other resistance wires or conductors. Thus the wiper system can be assembled in a motor vehicle without any difficulties, for the whole electric circuit can be closed afterwards.
The counter contact piece cooperating with the contact web on the pipe can be fixed onto a separate plug. In order to simplify and to cheapen the construction, however, an embodiment is preferred in which this counter contact piece is fixed onto a member which is needed for forming the washing system anyway. Embodiments are known in which the drive end portion of the pipe projects into a receiver of a tube connecting stud. Thus in such an embodiment the counter contact piece is fixed onto this tube connecting stud, whereby it is taken care that, when connecting the pipe with the tube connecting stud, automatically the separate conductors are also electrically connected.
Embodiments are known in which the other end portion of the pipe projects into a receiver of an intermediate piece, whereby the intermediate piece can integrally immediately be connected with the jet body or is formed in such a way that a tube leading to the jet can be plugged onto it. In such an embodiment the counter contact piece is fixed onto the intermediate piece in such a way that, when assembling the intermediate piece, the electrical connection is automatically provided.
In such windshield cleaning systems the wiper arm must precisely be adjusted before fixing it onto the wiper shaft so that in the parking position the windshield wiper does not project into the windshield in a disturbing manner. This must be taken into consideration when arranging the transitional contacts.
A suitable form of the conductors is fixed onto the pipe within the bore of the wiper shaft in such a way that a precise assembly is possible.
Primar
REFERENCES:
patent: 696702 (1902-04-01), Weitz
patent: 1719006 (1929-07-01), Fogland
patent: 1890290 (1932-12-01), Hargreaves
patent: 3408678 (1968-11-01), Linker
patent: 3418676 (1968-12-01), Byczkowski et al.
patent: 3587129 (1971-06-01), Linker
Egner-Walter Bruno
Pleib Eberhard
Schmid Eckhardt
Coe Philip R.
Graham Gary K.
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