Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1998-07-06
1999-11-02
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525031, 29428, 29453, 29505, B60S 0138
Patent
active
059746203
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a wiper blade, for example for a windscreen wiper device for a vehicle, comprising a metal yoke which is attached to a metal carrier in such manner as to be capable of pivoting movement about a pivot axis, with the interposition of a joint part of plastic material, which is stationary with respect to said carrier, whereby both said carrier and said yoke have a substantially U-shaped cross-section at the location of their interconnection, and whereby said yoke is positioned substantially within said carrier, with the interposition of said joint part.
The material of the joint part is referred to as plastic, which include any synthetic material having some flexibility.
A wiper blade of this type is usually provided with a plurality of yokes, in order to ensure that the wiper blade is in contact with the, usually curved, windscreen along its entire length. Each yoke is thereby pivoted to the end of a carrier in its central portion, which carrier itself may also be a yoke. The invention particularly relates to the manner in which the central portion of a yoke is pivoted to the end of a carrier.
With a joint of this type said pivoting of the yoke must take place substantially without any friction, whilst the joint must be extremely wear resistant. During use of a wiper blade relatively great, varying forces are exerted on the pivoted joint, whilst the yoke keeps pivoting almost constantly. In order to enhance the durability of the joint it is known to make the joint part of plastic material and mount it between the yoke and the carrier in such a manner that the two parts, which move relative to each other and which are both made of a metal, do not come into contact with one another.
EP-A-0412145 describes a wiper blade whereby the carrier and the yoke are pivotally interconnected by means of a pivot pin, which is secured in the yoke and which can rotate in two holes provided coaxially in the carrier. In order to prevent the metal pivot pin, which rotates in the carrier, from coming into direct contact with the carrier, said carrier is provided with a plastic part which extends into the said holes of the carrier. The pivot pin rotates in the plastic part, therefore.
EP-A-0631914 describes a wiper blade likewise comprising a pivot pin, whereby said pivot pin does not rotate in the plastic part, however, but is fixedly provided therein, so that the pivot pin, together with the plastic part, forms the joint part between the carrier and the yoke. The yoke thereby rotates with respect to the joint part.
The object of the invention is to provide a joint between the end of a carrier and the central portion of a yoke, whereby it is possible to realize a reliable construction comprising only a few parts.
In order to accomplish that objective the yoke is in each leg of the U-shaped cross-section provided with a protrusion at the location of the pivot axis, which protrusion pivotally engages in the joint part. This makes it possible to realize an effectively operating and reliable joint, whilst minimizing the number of parts. In particular it is possible to refrain from the use of a metal pivot pin.
According to a further aspect of the invention said protrusions may be substantially cylindrical and extend outwards on either side with respect to the yoke. A cylindrical protrusion may be made in a simple manner by means of a stamping operation during the manufacturing of the yoke. Since the protrusions extend outwards the two bearing supports of the yoke are spaced relatively far apart, as a result of which the forces exerted on said bearings are relatively small.
According to a further aspect of the invention the joint part may be attached to the carrier by engaging with projecting parts in recesses provided in the carrier. In this manner, which is known per se, a simple and yet effectively operating attachment of the joint part to the carrier is realized. The recesses in the carrier, into which the parts of the joint part extend, can be provided in the sheet material of the carrier in a simple mann
REFERENCES:
patent: 4286351 (1981-09-01), Mower et al.
patent: 5073060 (1991-12-01), Pethers
patent: 5271122 (1993-12-01), Roth et al.
patent: 5465454 (1995-11-01), Chang
patent: 5729861 (1998-03-01), Journee
patent: 5742973 (1998-04-01), Kessler
Aldag Andrew
Cooper Industries Inc.
Graham Gary K.
LandOfFree
Wiper blade and a method of manufacturing a wiper blade does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wiper blade and a method of manufacturing a wiper blade, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wiper blade and a method of manufacturing a wiper blade will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2119590