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Heavy Duty DC impact Wrench
"It's the most exciting new development in professional-quality shop tools in years," says Lyndol Hollingsworth, inventor of a new heavy-duty DC-powered impact wrench that he says provides the power and reliability of an air impact wrench.
Hollingsworth was a Snap-On Tools dealer for 15 years and says the most cornmon complaint he heard from farmers, ranchers, tire service people, and others was the hassle of hauling air compressors - along with generators or gas motors - to the field to power air-driven tools. "Some other DC-powered tools have come on the market but they've been built too light to hold up to heavy use," he says.
When Hollingsworth first started working on the idea in 1987, he used a Honda starter motor to drive his wrench. His cur-rent production model impact wrench is fitted with a6/10 hp. wing motor that gives it torque comparable to an air impact wrench and draws 75 to 85 amps, requiring heavy-gauge wiring. The wrench weighs 10 to 12 lbs. and simply clamps onto a 12-volt battery, with a heavy-duty relay switch mounted between the wrench and the battery. Or, the switch could be hard-wired into the vehicle and you would just plug in the wrench as needed.
Hollingsworth has designed 3/8, 1/2 and 1-in. drive wrenches. He hopes to develop an entire line of all-metal, heavy-duty DC tools. "They provide the same high torque as air wrenches without the noise and hassle that an air compressor brings to a work site. They're also safer to use than high wattage AC-powered tools," he says, noting that he has also invented a DC powered jack that uses a similar principle. It can't fall or leak down since it powers up and down on tandem drive screws.
Hollingsworth is looking for a manufacturer for both new products.
Contact: FARM SHOW Followup, Lyndol W. Hollingsworth, Best Concept Product Development &Marketing, 1309 August Dr., Austin, Tex. 78753 (ph 512 834-7886).

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1993 - Volume #17, Issue #6