Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Reexamination Certificate
1999-07-23
2001-05-22
Graham, Gary K. (Department: 1744)
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
C015S250400, C015S250451, C015S250480
Reexamination Certificate
active
06233779
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to windshield wipers and, more particularly, to a windshield wiper having multiple blade edges which may be individually and selectively brought into use.
2. Description of the Related Art
Wiper blades for vehicle windshields, headlights, and the like, are subject to wear which requires periodic renewal of the blades. In a conventional wiper assembly, a single flexible blade has a spine affixed along its entire length to an elongated holding member. The holding member is grasped at several points by an oscillating arm. When renewal of the blade is needed, the blade and holding member are removed from the arm, the blade is removed from the holding member, a separate new blade is assembled to the holding member, and the assembly of the new blade and holding member is attached to the arm. Alternatively, both the blade and the holding member are removed, discarded, and replaced with a new blade and holding member assembly.
Thus, conventional wiper assemblies require that the blade must be removed, discarded, and replaced each time the blade edge wears out. Due to the expense and inconvenience of obtaining and installing replacement blades, motorists are apt to postpone servicing the wipers.
Accordingly, there is a heretofore unmet need for a windshield wiper which may be easily and inexpensively serviced to renew the wiper blade edges.
SUMMARY OF THE INVENTION
The present invention satisfies the aforementioned need by providing a wiper having multiple blade edges that are selectively and individually brought into use. In a preferred embodiment, the wiper includes an elongated blade element having three radially extending, equally spaced blade edges. The wiper is slidably held in a wiper holding bracket, which, in turn, forms part of or is attached to a standard wiper support structure. The wiper holding bracket is configured such that the blade element is held in a selected one of multiple rotational positions with a single blade edge in wiping contact with the windshield. When a blade edge wears out, the blade element is slidably removed from the bracket, rotated with respect to the bracket, and slidably re-inserted into the bracket to bring a fresh blade edge into use. When all blade edges are worn out, the blade element is removed from the bracket and replaced.
These and other objects, advantages, and features of the present invention will be more fully understood and appreciated by reference to the written specification and appended drawings.
REFERENCES:
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patent: 2643360 (1978-03-01), None
patent: 3527528 (1987-02-01), None
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patent: 1162643 (1985-06-01), None
Graham Gary K.
Sonnenschein Nath & Rosenthal
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