Manufacture flexible shaft, high cycle and pneumatic concrete vibrators. Features product data and specifications, dealer locator, and news and events. Denver Concrete Vibrator - Quality built commercial concrete vibrators and generators since 1980 - designed for heavy to light construction. Denver Concrete Vibrator has been manufacturing superb flexible shaft, high cycle and pneumatic concrete vibrators for over 20 years. Our team brings together well over 100 years of combined experience in the industry. We take great pride in the products that we design and build.