Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Reexamination Certificate
2000-03-24
2001-09-11
Graham, Gary K. (Department: 1744)
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
C015S250010
Reexamination Certificate
active
06286175
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to windshield wiper protector, and more particularly, to a windshield wiper protector which is operative by self control.
2. Description of the Prior Art
A clear visibility is an important factor to assure secure driving for a driver so that quality of an automobile windshield wiper becomes negligible. Under the worst environmental condition, no matter how good or how firmly constructed a wiper is, it is definitely destined to be replaced within half year. According to observation and experiments of the inventor of the present invention, a conventional windshield wiper has the following common shortcomings:
1. At the extremely hot summer season, a wiper will be softened and deteriorated by contacting with a windshield glass at high temperature.
2. At the extremely cold winter season, a wiper will be hardened and deteriorated by frost, snow, and ice stuck on the surface of a windshield glass where a wiper contact with.
3. A wiper will be abrased or cracked when wiping through the surface of a windshield glass which is contaminated by dusts, or oil stains caused by vehicle exhaust gas.
4. An elastic fatigue caused by a long term continuous wiping action results in hardening and deterioration of a wiper.
To eliminate the above mentioned shortcomings, there has been disclosed a device by the name of “wiper holding down plate ” which utilizes a wind pressure produced by the wind flow velocity to achieve the purpose of removing oil stains stuck on the windshield glass. By so, it can only solve a part of existing problems, but after several times of application, old problems will re-occur.
A conventional windshield wiper protector characterized by including a clip and an urging bar has a main shortcoming that it is so inconvenient to be applicable only by manual control. Especially when encountering a sudden rainfall, the driver will be quite embarrassed by being unable to response. This device is effective only in the case that the automobile is to be parked for a long time. Naturally, it is not a satisfactory device.
In order to overcome the shortcomings inherent to the conventional technique described above, the present inventor has delved into this matter with a long time efforts and came to realization of an improved windshield wiper protector of the present invention.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a windshield wiper protector for an automobile which can facilitate the driver securely and comfortably drive in the night time or during rainy days.
It is another object of the present invention to provide a windshield wiper protector for an automobile which can be used to protect the windshield wiper from abrasing a windshield glass during its operation.
To achieve these and other objects, gist of the present invention is directed to provide a windshield wiper protector comprising a pressurized fluid container, a plunger installed in the pressurized fluid container, a solenoid operated device provided at one side of the plunger in the pressurized fluid container, a coil spring being connected to the plunger at the same side of the solenoid operated device, while the other side of the plunger is adjacent to a pressurized fluid chamber, a push bar connected to the plunger at the opposite side of the pressurized fluid chamber, an adjustable screw combined to an extended end of the push bar such that the adjustable screw is able to extend or retract, a fixing nut for screw combining the adjustable screw and the push bar.
With such a structure, as the solenoid operated device is energized, a magnetic force is produced to attract the plunger with the result that the fluid pressure in the pressurized fluid chamber is lowered due to increase of volume, and the push bar retracts inwardly into the chamber. One the other hand, if the power supply to the solenoid operated device is cut off, the magnetic force produced therefrom disappears causing the coil spring to be released from a tensile force and stretched to reject the plunger outwardly. As a result, the push bar is forced to extend outwardly due to increase of fluid pressure caused by decreased volume of the pressurized fluid chamber. Besides, a spacer having an adjustable aperture thereon is provided between the pressurized fluid chamber and the push bar so as to adjust the fluid pressure for alleviating and smoothening movement of the push bar.
REFERENCES:
patent: 5571221 (1996-11-01), Kuo et al.
patent: 3325707 (1985-01-01), None
Chan Raymond Y.
David and Raymond Patent Group
Graham Gary K.
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