Road structure – process – or apparatus – Apparatus – Automatic control
Reexamination Certificate
2000-12-22
2001-10-16
Will, Thomas B. (Department: 3673)
Road structure, process, or apparatus
Apparatus
Automatic control
C404S114000, C404S118000, C404S119000, C404S120000
Reexamination Certificate
active
06302619
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to an apparatus for screeding concrete, cement, mud, sand, dirt, grain or other similar dry or semi-fluid materials (hereinafter “concrete”) and more particularly to a powered inertia propelled screed apparatus for screeding concrete.
It is envisaged that the invention will find application in the field of finished concrete work, more particularly in the field of leveling, smoothing or spreading placed concrete before solidification of same.
DESCRIPTION OF THE RELATED ART
To complete small concrete jobs at home, such as a new driveway, sidewalk or deck, a hand-held screed board is used to level, smooth or spread recently poured or deposited concrete. Heavier particles are forced downward during this process. The user holds the screed board in his hands and pushes and pulls the board across the top of the concrete to level, smooth or spread same. It is also known that by setting up forms, the user is able to obtain a more level and smooth surface. The user extends the hand-held screed board across the forms so that the board is above and across the concrete. The user then moves the board transverse along the forms in a back and forth movement along the forms to level, smooth or spread the concrete. The problem with using a hand-held screed board is that it is labor intensive, difficult to use and requires the user to be in a bending, squatting or kneeling position, which can be uncomfortable.
To level, smooth or spread concrete in larger areas that are beyond the reach of the user, screeding the concrete becomes problematic. Either multiple persons are required to perform the job or the person is required to stand in the concrete while leveling, smoothing or spreading the concrete, which is very messy and difficult. As an alternative, most homeowners hire contractors to complete small concrete jobs, which can be very expensive.
There are machines which have been developed to level, smooth and spread concrete; however, these machines are large, difficult to transport and expensive. Furthermore, using these large machines for small jobs would not be practical. These machines are usually only practical for larger jobs because of the purchase price. These large machines require multiple operators to operate them. In short, these machines are not suitable for small jobs such as driveways, sidewalks and decks. As such, municipalities, street builders and construction companies are usually the only purchasers of these machines.
There are vibrating screed machines and tamping machines available to level, smooth and spread concrete; however, these machines only work well on flat surfaces. If these machines are utilized on a sloping surface, the concrete tends to flow down the slope due to the vibration which results in an undesirable condition.
The present invention is directed to overcoming one or more of the problems set forth above.
SUMMARY OF THE INVENTION
An aspect of the invention is providing a powered inertia propelled screed apparatus for screeding concrete.
In another aspect of the invention there is provided a powered inertia propelled screed apparatus suitable for many different sized jobs.
Yet another aspect of the invention there is provided a powered inertia propelled screed apparatus that utilizes inertia to screed concrete.
Still another aspect of the invention there is provided a powered inertia propelled screed apparatus that is inexpensive to manufacturer.
Another aspect of the invention there is provided a powered inertia propelled screed apparatus that allows one person to screed concrete without much effort.
Yet another aspect of the invention there is provided a powered inertia propelled screed apparatus that is efficient in screeding concrete.
In another aspect of the invention there is provided a powered inertia propelled screed apparatus that is easily controlled and operated.
It is an aspect of the invention there is provided a powered inertia propelled screed apparatus for reducing the amount of time to screed concrete.
It is another aspect of the invention there is provided a powered inertia propelled screed apparatus that is compact and easily transportable from job to job.
Yet another aspect of the invention there is provided a powered inertia propelled screed apparatus that is easily modified to fit the particular size of the area that requires screeding.
Still another aspect of the invention there is provided a powered inertia propelled screed apparatus that can be manufactured with different size power sources depending on the application.
Another aspect of the invention there is provided a powered inertia propelled screed apparatus that can be fitted with different sized screeds depending on the application.
Yet another aspect of the invention there is provided a powered inertia propelled screed apparatus that can be used on non-flat or sloped surfaces producing excellent results.
The above aspects are merely illustrative and should not be construed as all-inclusive. The aspects should not be construed as limiting the scope of the invention rather the scope of the invention is detailed in the appended claims.
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Hartmann Gary S.
Husch & Eppenberger LLC
Muir Robert E.
Musgrave Richard J.
Will Thomas B.
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