Convex Trowel 2

Convex Trowel used to spread concrete on a driveway repair.

Patent # 7,543,349
See Patent at USPTO

http://patft.uspto.gov/netacgi/nph-Pa...

This is a concrete trowel, its specifically made to do concave surfaces smoothly and fast. No other tool in existence can do the things this tool can. It's the 1st of its kind. Only other tool that comes close to this tool is the pool trowel, but my tool can do anything it can't do. This tool was designed to make ponds out of concrete, most ponds are at this time made with plastic liners, this tool allows ponds to be now made out of concrete. Other jobs this tool can do is curbs, pools, ditches, stucco jobs, any job dealing with concrete that has up to a 44 degree concave surface. The patent is very flexable and covers many different variations, long, short, wide, etc. and covers any type of material that can be used to make a trowel.
Reading the patent info, you should be able to see all this tools potential and versatility.

Category:

Howto & Style

Tags:

• Convex
• Trowel

[johnhornsby]

As far as moving the concrete around, I think the size of your tool is creating more work for you than is needed. Most tradespeople will use a rake or a hoe for this purpose, and then switch the the trowel to work the surface. I'm imagining a salad bowl shape working better than the tugboat shape that you're using now.

I bid you luck in your endeavour!

John

[johnhornsby]

Trowels work well because they offer plenty of surface area as well as a sharp edge with which tradespeople can use to spread concrete accurately and evenly. I think that your tool will force little interfering pockets of pressure into the mix which will can displace the under-laying wire and will dictate where cracks can form. Also, floats don't have rounded edges, because they need to adhere somewhat to the surface being worked on and not just push the aggregate around.