Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1988-01-22
1988-12-06
Feldman, Peter
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
1525032, 403155, B60S 138
Patent
active
047887362
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Field of the Invention
This invention relates to a windshield wiper for use in a vehicle and, particularly to a yoke member connecting device in the windshield wiper.
2. Description of Prior Art
FIG. 12 shows a typical prior art windshield wiper, in which a yoke member 2 is connected to a wiper arm 1 and, is also connected at opposite ends thereof yoke members 3 and 4 respectively through pivot pins 5 and 6 respectively. A wiper blade including a wiping blade or a blade rubber 7 is supported by the yoke members 3 and 4. The pivot pins 5 and 6 are usually rivets, which require troublesome rivetting operation in assembly the wiper.
Japanese Patent Publication No. 55-8371 shows a connecting device for omitting the rivetting operation, however, it is required to bend a yoke member during the assembling operation so that the assembling cost cannot be reduced.
The assignee of the invention has proposed in Japanese Utility Model Application No. 60-91158 a connecting device, in which tapered portions are provided on opposite ends of the pivot pin and, which tapered portions engage respectively with resilient bearing portions so as to prevent the pivot pin from escaping out. However there are problems in the material of resilient bearing portions and in production costs.
SUMMARY OF THE INVENTION
An object of the present invention is to solve the problems aforementioned and to provide a novel yoke member connecting device of a windshield wiper.
According to the invention there is provided a yoke member connecting device for pivotally connecting a first and a second yoke members of a windshield wiper, each of the yoke members having generally channel shaped cross section consisting of vertical side walls and a top wall connecting the upper ends of the side walls respectively, the connecting device comprises a spacer member having opposing side walls engaging with the inside surfaces of the side walls of the first yoke member and with the outside surfaces of the side walls of the second yoke member and a top wall connecting the side walls of the spacer member, and a pivot pin extending through the side walls of the first and second yoke members and of the spacer member, the pivot pin having a shall diameter portion at the location passing through at least one of the side walls of the spacer member. The at least one side wall of the spacer member has a bore corresponding to the small diameter portion of the pivot pin, and a first cutout extending radially outward from the bore in one direction, and the at least one side wall of the spacer member further has a second cutout spaced from the first cutout in the direction generally perpendicular to the first direction, and the second cutout extending generally parallel to the first cutout.
The first and second cutouts enable to resiliently expand the bore, thus, it is possible to pass through the remaining portion or the large diameter portion of the pivot pin, thereby enabling the assembling operation by simply pushing the pivot pin through aligning openings in side walls of first and second yoke members and the spacer member. Further, in assembled condition, the bore in the spacer member engages with the small diameter portion of the pivot pin to reliably maintain the pivot pin in its assembled position.
BRIEF DESCRIPTION OF THE DRAWINGS
Further objects and advantages of the present invention will become apparent from the following description with reference to the drawings exemplifying some preferred embodiments of the present invention, in which:
FIG. 1 is a vertical sectional view of a yoke member connecting device according to a first embodiment of the present invention;
FIG. 2 is an exploded view of the first embodiment;
FIG. 3 is a partial side view showing a spacer member and a pivot pin of the first embodiment;
FIG. 4 is a vertical sectional view similar to FIG. 1 but showing a modified form;
FIG. 5 is a partial sectional view of engaging portion between the pivot pin and the spacer member and showing a modified form;
FIG. 6 is a partial sid
REFERENCES:
patent: 2876482 (1959-03-01), Oishei
patent: 3585672 (1971-06-01), Habert
patent: 3864783 (1975-02-01), Arman
patent: 4675934 (1987-06-01), Dal Palu 15250.42
Arai Masaru
Saita Itsuro
Feldman Peter
Nippon Wiper Blade Co., Ltd.
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