Patent Application
20090214295
The invention relates to the field of unique hand and mechanically powered plate type tools known as tampers used for tamping down and compacting soil/aggregate in bed preparation and in setting concrete pavers placed thereon. They are effective in leveling soil surfaces and compacting pavers into proper position in the ground. The invention also relates to powered tampers, commercially known as Jumping Jacking plate tampers, also used for compacting soil, asphalt and similar surfaces. Tampers are routinely used by gardeners, landscapers, nurserymen, hardscapers, contractors, road builders, farmers, and like workers.
It has been found that under normal usage of both steel faced manual and powered tamper tools, the hard face of the plate of the tamper sometimes breaks and often causes damage to the pavers being placed, such that replacement of pavers becomes necessary. This problem is currently being addressed by bonding a rubber face directly onto the plate steel face of the tamper. The rubber face serves to cushion tamping efforts. Unfortunately, rubber faces, in time and after even less than prolonged usage, will delaminate or otherwise separate from the plate steel facings, resulting in costly tool repairs or component replacement, or disposal of the tool itself.
It is thus an object of the present invention to overcome the disadvantages and limitations of prior steel faced hand and mechanically powered tampers.
It is an object of the present invention to provide a tamper which has a cushioned face which, when the face is worn or falling off, can be replaced without having to replace the tamper itself.
It is another object of the present invention to provide a tamper which will eliminate the need to replace the tool when the face of the tamper is damaged during use.
It is still another object of the present invention to provide a tamper which can be repeatedly used without damage either to the face of the tamper or the paver or other surface on which the tamper is used.
It is a further object of the present invention to provide a tamper which has a removeable tool head assembly which, when used, can be replaced with a new head assembly.
It is another object of the present invention to provide a tamper which has a removeable tool head assembly with a rubber or other resilient pad, presenting a cushioned tamper face which is completely flat with no openings or fasteners on the surface of the face.
It is an additional object of the present invention to provide a tamper with a removeable tool head assembly which is easier and less costly than repairing tampers with direct steel face to resilient pad bonding.
It is another object of the present invention to provide a tamper which is not only easy and relatively inexpensive to manufacture, but also conserves natural resources in that less metal material is used to construct the tool head of the tamper and in that tamper tools will need to be replaced less often.
These and other objects are accomplished by the invention, a hand or mechanically powered tamper tool which has a removeable, replaceable, tool head assembly. The tool head assembly is a separable component from the upper section of the tamper tool which consists of the mounting plate and its attached tamper handle. The tool head assembly has a rubber or similarly resilient material pad bonded to the underside of a backing plate. Connection elements, such as bolts, are permanently secured between the pad and the backing plate. The bolts extend through and are upstanding from the backing plate. The bolts are configured to then extend through openings in the tamper mounting plate, where nuts are used to secure the tool head assembly to the mounting plate. The tool head assembly is thus removeable from the mounting plate and its handle or supporting element and allows for the simple and ready replacement of a used and worn tool head assembly with a new tool head assembly.
The novel features which are considered as characteristic of the invention are set forth in particular in the appended claims. The invention, itself, however, both as to its design, construction and use, together with additional features and advantages thereof, are best understood upon review of the following detailed description with reference to the accompanying drawings.
Tamper tool 1 comprises upper section 2 comprising handle 3 secured to and extending perpendicularly up from mounting plate 4 via support 5. Mounting plate 4, a standard steel tamper plate member, is flat and has top surface 6 and bottom surface 8. Openings 10, 12, 14, and 16 extend through mounting plate 4.
Tool head assembly 20, a separate and independent component, comprises rubber pad 22 and metal backing plate 24. Pad 22 can be made of any relatively hard, yet resilient material. Pad 22 has flat, lower surface 26, which contacts the paver or other ground surface on which tamper tool 1 is used, and upper surface 28, which is permanently bonded with suitable adhesive 27 to backing plate 24. Threaded bolt connectors 30, 32, 34, and 36 extend from adhesived upper surface 28 of pad 22, through backing plate 24. It is contemplated that the bolt connectors will be permanently fastened by welding, threads, knurl, or equivalent attachment method, to backing plate 24, prior to the bonding of pad 22 to the backing plate. By this configuration, connectors 30, 32, 34, 36 are fixedly upstanding from tool head assembly 20 and lower surface 26 of pad 22 remains a flat, planar surface, uninterrupted by openings, bolt heads, or similar intrusive elements. Thus, when tool 1 is employed to tamp down pavers and like materials, contact is made solely with the smooth flat, resilient uninterrupted surface provided by lower surface 26 of pad 22.
For connection between upper section 2, and specifically mounting plate 6, to tool head assembly 20, these components are positioned such that connectors 30, 32, 34, and 36 are aligned beneath openings 10, 12, 14, and 16, respectively, of the mounting plate. The connectors are then inserted into the openings where they are secured by nuts 40, 42, 44, and 46 with threads corresponding to the threaded bolt connectors. Tamper tool 1 is now ready for use. Again, the resilient, relatively cushioning nature of pad 22, will serve to prevent breakage or other damage to pavers or similar ground surfaces, when tamper tool is being used.
After prolonged usage of tamper tool 1, pad 22 will likely become materially scarred and worn. Nuts 40, 42, 44, and 46 are removed from bolt connectors 30, 32, 34, and 36 and tool head assembly 20 is separated and removed from upper section 2 and mounting plate 6. A replacement tool head assembly with a new rubber pad can be attached, via its bolt connectors, to mounting plate 6, to allow the tamping operation to proceed.
The inventive concept of the present invention is equally applicable to mechanically powered hand controlled tampers, commonly known as “Jumping Jacks” plate tampers. These pieces of equipment are most often used on large commercial projects, where asphalt or great quantities of soil must be compacted. Like hand tampers, powered tampers' pads and their working faces become worn over time. This requires replacement of the entire lower base component of the tamper, an expensive proposition. However, the present invention also addresses this problem and its attendant expense.
As seen in
The tamper tools of the present invention thus eliminate the need to replace an entire tool or an expensive component of the tool when only its working face becomes worn out. A new, fresh tool head assembly can be used which easily and quickly will replace the old, worn tool head assembly. The new tool head assembly also effectively, efficiently and safely provides a means to continue the tamping operation with little downtime and undue expense.
Certain novel features and components of this invention are disclosed in detail in order to make the invention clear in at least one form thereof. However, it is to be clearly understood that the invention as disclosed is not necessarily limited to the exact form and details as disclosed, since it is apparent that various modifications and changes may be made without departing from the spirit of the invention.
This application claims the benefit of provisional application Ser. No. 61/067,123, filed on Feb. 26, 2008.
| Number | Date | Country | |
|---|---|---|---|
| 61067123 | Feb 2008 | US |
