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Background Information

Employment History




U.S. Tennis Court & Track Builders Association

Precision Grading Company

Web References (10 Total References)

About Precision Grading Company Laser Grader - Laser Grading History of The Laser Grader [cached]

Leo Paradis founded Precision Grading Company in 1982 providing laser grading services. He provided a specialized, high quality fine-grading service with laser graders. Specializing in fine-grading using the mini-grader © and later the improved and re-designed Laser-Grader ®.

Leo Paradis Owner Inventor Inventor of the Laser-Grader ®
Leo Paradis has extensive experience in the construction industry operating heavy equipment including bulldozers, front end loaders, cranes, and backhoes. Leo was an instructor for the International Union of Operating Engineers, Local #4, Boston, MA. where he taught classes for the union apprentices.
His background in hydraulics and welding were important aids to designing and building the first Laser-Grader ® laser grading machine. In 1992 Leo became a member of the U.S. Tennis Court & Track Builders Association. During the last 25 years, Paradis has been an owner/operator of Laser-Grading ® slab-on-grade for buildings, ice rinks, tennis courts, indoor and outdoor tracks, and athletic fields.
Our History
In 1976 the Mini-Grader © was first designed and built by Leo Paradis . Over the next few years it had many engineering and mechanical improvements.
In 1987, Precision Mfg. was incorporated with Leo Paradis, president, and the first sale of a Laser-Grader ® took place.
Leo ran both the manufacturing and grading service operations until October 2003 when he sold the manufacturing to P. Ronci Machine of Rhode Island .
Laser Grader Laser Grading Services
Now fully focused on his interests with Precision Grading Company, Leo provides laser grader laser grading services throughout the region.

News Story New England Construction Trade Journal - Flat Floors For Wheaton Precision Grading Company - Laser Grading Laser Grader [cached]

Designed and patented by Leo Paradis, the grader is equipped with two laser beacon receivers and a control box mounted in front of the operator.

News Story About Laser Grader - Precision Grading Company - Laser Grading Laser Grader [cached]

LEO PARADIS may have built the next best thing to a better mousetrap-a mini-grader that squeezes through narrow doors but does a big grader job. And although the world hasn't yet beaten a path to his doorstep, he says so many contractors are hiring his machine that he's building another one. Laser Grader Early Days The Original Article As it Appeared Laser Grader Laser Grading

Leo Paradis of Precision Grading uses his homemade mini-grader to fine-grade the gravel base for a concrete floor in a commercial building. At left is the Spectra-Physics Electronic Level which he uses to guide the grader's moldboard during the precision leveling operation.
Paradis built the machine right from scratch. It features an 18-hp Cushman golf cart gasoline engine which powers a Vickers six-gailon oil pump and which in turn drives the Charlin hydraulic motor -the primary mover for the entire hydraulic system. Because of the hydrostatic drive and the gearing he used, he said the 18 hp is actually boosted to 119 wheel horsepower, giving him all the power and infinite speed he needs for the job. The six lever hydraulic controls raise and lower the dozer blade, raise and lower the moldboard, move it laterally and vary the angle of the blade. The mold board itself is made from a ten-inch-diameter steel pipe, while the cutting blade is a standard manufacturer's piece. Giving him the precision and production he needs.
The SpectraPhysics ELI Electronic Level he bought from Waste, Inc. of Concord, N.H. The level provides an invisible electronic signal which is picked up by a target sensor mounted on the grader's moldboard. Set up above the grader's hydraulic controls, and wired to the target sensor, is a remote display which tells Paradis whether his blade is too high, too low, or on target for the predetermined grade. "When I first started using the minigrader," he said, "I didn't have the electronic level.

Laser Grading Equipment | Laser Grader Australia [cached]

It was manufactured by inventor Leo Paradis. Over the years demand grew and Leo was unable to keep up orders. His company was sold to Ronci Machine Company who took production to a new high.

LASER-GRADER® MFG. - Division of P. Ronci Machine Co. [cached]

In 1976 the Mini-Grader© was first designed and built by Leo Paradis. Over the next few years it had many engineering and mechanical improvements.

The Laser-Grader ® was first used in New England and later expanded throughout the U.S.A. and Canada to laser-grade tennis courts, ice rinks, athletic fields, and floors for commercial and industrial buildings. As the Laser-Grader® expanded to various construction sites and more people became familiar with machine, there was increasing pressure to put this machine into production . In 1987, Precision Mfg. was incorporated with Leo Paradis, president, and the first sale of a Laser-Grader ® took place.

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