Patent Application
20140270958
1. Field of the Invention
This invention relates generally to hand held devices for tamping, smoothing or impressing a specifically desired pattern or form onto recently poured concrete which has not set or cured, such as a sidewalk or another selected surface. The devices of this invention are commonly known as tampers, pounders or stampers.
2. BACKGROUND OF THE INVENTION
U.S. Pat. No. 7,387,466 discloses a known device for imprinting patterns on concrete. The device includes a base with a cylindrical recess for receiving a cylindrical handle. The cylindrical handle is secured to the base with a pin which extends through the cylindrical recess and the cylindrical handle. One shortcoming of the '466 Patent is that it can be difficult to align a hole in the cylindrical recess with a hole the cylindrical handle to pass the pin through both holes.
A general object of the invention is to provide an improved device for tamping, smoothing or impressing a specifically desired pattern or form onto freshly poured concrete, such as on a sidewalk or another selected surface.
The improved device of this invention includes a base that is attached and secured to a handle with a pin. The base includes an opening with a non-circular cross-section for receiving the handle. The handle includes a non-circular shaped end that corresponds to the non-circular cross-section of the opening. The improved device provides a rigid connection between the handle and the base and a simple means for aligning a hole in the handle with a hole in the base so that the pin can easily pass through both holes.
These and other objects and features of this invention will be better understood from the following detailed description taken in conjunction with the drawings, wherein:
The present invention provides an improved device for smoothing or impressing a specifically desired pattern or form onto uncured concrete such as, but not limited to sidewalks, driveways, streets, curbs, concrete floors or other surfaces.
The base 12 of this invention is preferably manufactured of an elastomeric material including, but not limited to, Shore A urethane (such as Shore A urethane with a durometer in the range of 25 to 100), Shore D urethane, silicone and/or latex. The elastomeric material reduces the physical impact on a user tamping freshly poured concrete. Alternatively, the base 12 can be made of any other material useful for tamping freshly poured concrete, such as, but not limited to, metal or composite materials. Further, those skilled in the art and guided by the teachings herein provided will understand and appreciate that the base 12 can be desirably fabricated or manufactured by various techniques including, for example, injection molding. In another alternative embodiment, the base 12 may be manufactured with a core material which is a different material than a surrounding material, for example, but not limited to, a metal core surrounded by an elastomeric material.
The base 12 includes a platform 18 with a collar 20 extending from an upper surface of the platform 18. In this embodiment, the platform 18 comprises a square or rectangular shape however, the platform 18 may comprise any shape. In an embodiment of this invention, a lower surface of the platform 18 includes a textured surface for impressing a pattern or texture onto recently poured concrete which has not set. Such as a pattern in the form or appearance of brick, stone, rock, wood or other material as may be desired in a specific or particular application. In an alternative embodiment, the lower surface of the platform 18 includes a smooth surface for tamping and/or smoothing a surface of recently poured concrete which has not set.
The collar 20 is preferably integrally formed with and extends from the upper surface of platform 18. In this embodiment, the collar 20 comprise four surfaces that extend from the platform 18 and gradually narrow, in a pyramid-like fashion near the bottom, and transition into generally vertical surfaces that end at a generally flat top surface. However, the collar 20 is not limited to this shape and may comprise any shape capable of receiving a portion of the handle 14. As shown in the figures, the collar 20 includes a receiver 22 comprising an opening in the flat top surface and a void extending into the collar 20 for receiving a portion of the handle 14. In a preferred embodiment, the receiver 22 comprises a polygon-shaped cross-section that matches with an insert portion of the handle 14 allowing for easy alignment of holes for receiving the pin 16. In the embodiment of
As shown in
The collar portion 20 and the handle terminal end 24 each include holes which must be aligned so that the pin 16 can pass through both holes to secure the base to the handle. The polygon-shaped receiver 22 and the matching polygon-shaped handle terminal end 24 simplifies the alignment process by restricting the number of ways that the handle terminal end 24 can fit into the receiver 22.
In an alternative embodiment of this invention, the tamper 10 may be used with a mat, not shown, that includes a surface with a textured or smooth surface for impressing a pattern or texture onto recently poured concrete or for smoothing recently poured concrete. The mat may be placed on uncured concrete and the tamper 10 may be used to press the mat into the uncured concrete to create a surface impression in the concrete.
The invention illustratively disclosed herein suitably may be practiced in the absence of any element, part, step, component, or ingredient which is not specifically disclosed herein.
While in the foregoing detailed description this invention has been described in relation to certain preferred embodiments thereof, and many details have been set forth for purposes of illustration, it will be apparent to those skilled in the art that the invention is susceptible to additional embodiments and that certain of the details described herein can be varied considerably without departing from the basic principles of the invention.
| Number | Date | Country | |
|---|---|---|---|
| 61798051 | Mar 2013 | US |
