Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1990-09-20
1992-12-22
Hornsby, Harvey C.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525035, B60S 104, B60S 137
Patent
active
051724499
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a windshield wiper.
BACKGROUND OF THE INVENTION
Windshield wipers of this kind are known from the German patent No. 21 14 102 or from the German patent No. 34 31 936. In these windshield wipers a rigid carrier yoke is used, onto which a rubber element or a rail guiding this rubber element is supported via several resilient lugs spread in the longitudinal direction. In such a windshield wiper the conventional pressure spring between the linking member and the fastening member of the wiper arm in those windshield wipers mainly used in series nowadays can be avoided, and a carrier yoke system consisting of several yokes jointly mounted to each other is also unnecessary. Thus, with respect to inexpensive production, the windshield wipers of the sort disclosed may be advantageous. However, a wiping effect meeting all requirements in the whole wiping area has not been achieved.
SUMMARY OF THE INVENTION
Thus, the object of the present invention is to improve the wiping effect of the known wiper blades so that they are comparable with the windshield wipers normally produced in series nowadays, which windshield wipers comprise a system of several yokes mounted to each other in the form of a balance arm. Thereby the construction of the windshield wiper is as simple as possible so that the separate parts can be produced and mounted at low costs.
This object is achieved according to the present invention by providing, on a known windshield wiper with several resilient lugs pointing in a first direction, at least one resilient lug or one resilient element acting in the other direction. Thus the distribution of pressure along the rubber element can be substantially improved, particularly at the end. A resilient lug or a resilient element directly acts upon the end of the rubber element, whereas in the known wipers--as is made apparent in the drawings of the patents mentioned--an end of the rubber element is not guided and is not resiliently supported on the carrier yoke so that, especially with respect to curved windshields, the wiping effect is not satisfactory.
The object of the present invention can be realized in different ways. For instance, starting from the middle and progressing towards the end of the rubber element, the separate resilient lugs or resilient elements could be arranged in different directions. Thus the number of resilient lugs pointing in the first direction and the number of the resilient lugs pointing in the second direction would be the same in such an embodiment. However, an embodiment is preferred in which, apart from the resilient lugs pointing in the first direction, only one resilient lug points in the second direction and that resilient lug acts upon the end of the rubber element not otherwise affected.
It is not absolutely necessary that the resilient lugs or resilient elements be constructed in the same way. However, an especially advantageous embodiment is achieved when all the resilient lugs are integrally connected with each other and are preferably punched out from a steel resilient strip. All the elements for supporting the rubber element in a resilient way are integrally manufactured so that there are no difficulties with assembling them.
Theoretically the resilient lugs integrally connected with each other could directly engage the back of the rubber element or the rail guiding the rubber element. However, such a construction would not ensure a sufficiently lateral guide of the rubber element. Therefore, in a preferred embodiment, these resilient lugs each act upon a claw, whereby these claws guide and support the rubber element or the rail guiding the rubber element. In an especially preferred embodiment, the claws are part of a clawed yoke with each claw swivellable in relation to the carrier yoke. Each clawed yoke has bearing pins coaxially arranged and laterally protruding, which bearing pins engage respective bearing receivers on the carrier yoke. An embodiment is especially preferred in which these bearing pins engage
REFERENCES:
patent: 3176337 (1965-04-01), Glynn
patent: 3665544 (1972-05-01), Sakamoto
patent: 3748685 (1973-07-01), Edele et al.
patent: 3978543 (1976-09-01), Tomlin
patent: 4095308 (1978-06-01), Blaiklock
patent: 4187576 (1980-02-01), Deibel
Baumgarten Peter
Egner-Walter Bruno
Schmid Eckhardt
Graham Gary K.
Hornsby Harvey C.
Lewis J. Gordon
Seiter Robert P.
SWF Auto-Electric GmbH
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