Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Reexamination Certificate
2000-02-02
2001-08-14
Graham, Gary K. (Department: 1744)
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
C015S250352, C403S314000, C403S409100
Reexamination Certificate
active
06272718
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to wiper arms.
A wiper arm substantially comprises a wiper rod and a joint part and serves to connect a wiper blade with a drive mechanism.
For connecting the wiper rod to the joint part, it is known to use single or double rivet connections, or a rivetless connection by positive engagement as a consequence of a deformation of the joint part. It is also known to connect the joint part and the wiper rod by positive engagement by placing them in corresponding preshaped recesses.
A disadvantage of this is that after the wiper rod is placed in the joint part, a deformation of side walls of the joint part is always required. In these connections, it is difficult to assure the secure engagement of the protrusions and to obtain the positive engagement.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a wiper arm which avoids the disadvantages of the prior art.
In keeping with these objects, one feature of present invention resides, briefly stated, in a wiper arm in which the retaining faces for guiding the wiper rod taper toward one another, and the wiper rod has a tapering partial region, wherein the outer dimensions of the partial region in a first portion are less than the inside distance between the retaining faces and in a second portion are wider than the side distance between the retaining faces.
Because of the tapering connection, installation without tools is possible, since the wiper rod merely has to be thrust into the joint part.
The positional fixation of the wiper rod inside the joint part can be done either by detent locking or by a tension spring. Self-locking because of a corresponding taper angle is also advantageous, particularly whenever the connection is not expected to have to be undone again later.
By means of an additional retaining region inside the joint part, the stability of the connection can be increased still further.
REFERENCES:
patent: 4559663 (1985-12-01), Bauer et al.
patent: 1985505 (1968-05-01), None
patent: 566471 (1993-10-01), None
patent: 785116 (1997-01-01), None
patent: 2401803 (1979-03-01), None
patent: 2443948 (1980-07-01), None
patent: 2069325 (1981-08-01), None
Graham Gary K.
Robert & Bosch GmbH
Striker Michael J.
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