This Thomas has no doubts about the utility of pumps and compressors. Gardener Denver Thomas, formerly known as Thomas Industries, makes specialty compressor and vacuum pumps, and liquid pumps -- more than 90% of which are integral to an OEM product. The short list includes rotary vane and articulated piston, and liquid peristaltic and diaphragm pumps. Its wares are used in automotive as well as food and beverage, medical, and industrial equipment, from air clutches in cars to beer dispensers, blood pressure monitors and tooth whitening tools, and water sampling devices. Thomas has manufacturing facilities in the US, Germany, and China. The company operates as a division of compressor maker Gardner Denver.