(10 Total References)
Tennis Industry Magazine - News
One of the early pioneers in using lasers to build tennis courts was Leo Paradis of Precision Grading Co. of Danville, N.H. As early as 1976, Paradis was building and operating his own laser-controlled, hydraulically adjusted graders.In fact, the term "laser-grader," an expression commonly used in the construction industry today, is actually a registered trademark belonging to Paradis. Today, laser devices are widely available in the construction business.Lasers can control bulldozers, box blades, trenchers or motorgraders.Machinery is either "laser controlled" or "laser assisted."The difference between these two terms is important. Laser controlled means that the machinery automatically adjusts the equipment setting by hydraulic devices, greatly improving the time to grade a site and eliminating human error.Laser assisted means that the machine operator must read a laser indicator mounted on the machine and adjust the blade manually.
About Precision Grading Company Laser Grader - Laser Grading History of The Laser Grader
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 ®
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.
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.
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.
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
provides laser grader laser grading services throughout the region.
Precision Grading Company
Leo Paradis has over 28 years experience in the construction industry.His extensive background in hydraulics and welding were important aids to designing and building the first Laser-Grader®.Starting in 1971, Paradis operated heavy equipment including bulldozers, front end loaders, cranes, and backhoes.For three years, he was an instructor for the International Union of Operating Engineers, Local #4, Boston, MA. As such, he taught classes for the union apprentices.Precision Grading Company was started in 1982 specializing in fine-grading using the mini-grader© and later the improved and re-designed Laser-Grader®.In 1992 he became a member of the U.S. Tennis Court & Track Builders Association.During the last 16 years, Paradis has been an owner/operator Laser-Grading® slab-on-grade for buildings, ice rinks, tennis courts, indoor and outdoortracks, and athletic fields.In 1987 he began manufacturing the Laser-Grader® on a small scale, an operation he still maintains.
News Story New England Construction Trade Journal - Flat Floors For Wheaton Precision Grading Company - Laser Grading Laser Grader
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
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.
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
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
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
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.