This configuration became the modern Quincy QR-25 and QP reciprocating air compressor series. Four-cylinder vee models extended the splash lubricated machines to 15 hp (11.2 kW) at 1150 rpm.Īt some point in the product evolution, oil pumps were added to provide pressurized lubrication of the compressor bearings. (76 mm) stroke, 5 hp (3.7 kW) machines to a 3.5 in. Two-cylinder 1000 rpm vertical models now range from small 3.0 in. Maximum pressure capability was increased to 175 psig (12 bar) over time. The two-stage QT series retained the original splash-lubricated design. Quincy’s lines of belt-driven reciprocating compressors have evolved into many sizes derived from the original QR-25 series. Diverse applications included use in large mining shovels, NASA rocket transporters and starting air compressors on U.S. The line continued to expand in range including introduction of four-cylinder vee models in 1968. By c.1952, more than 600,000 Quincy compressors had been produced, finding use in countless applications. Navy in World War II to fill pontoon boats. Quincy QR-25 compressors were used by the U.S. In the late 1930s, Quincy introduced the QR-25 reciprocating compressor series that evolved with many modifications over time to continue in production to this day. With humble beginnings and adapting to the developing market for air compressors, the company survived the Great Depression and continued to grow. Quincy’s advertising claimed that it was the fastest pumping compressor on the market. The bladed flywheel, which also served as a belt-drive pulley, forced air over fins on the compressor cylinders, intercooler and aftercooler, so that no water cooling was required to deliver relatively cool air to the storage tank. These small splash-lubricated two-cylinder compressors had a number of features that were innovative at the time. They were generally supplied with, or mounted on, an air tank, driven by a small gasoline engine for portable use or a small electric motor for stationary applications. The company’s early reciprocating air compressors were two-cylinder arrangements, either arranged vertically for single-stage compression or horizontally opposed for two-stage compression. Changing its name to the Quincy Compressor Company, the company grew by taking advantage of the increasing demand for compressed air in burgeoning automotive and furnishings markets. Their primary products were vacuum pumps for milking cows.īy the end of 1923, the company’s production had grown, and its business expanded further with the development of a small reciprocating air compressor in 1924. In 1920, discovering that the company where they worked had no interest in making it a product, they found financial backing for starting the Wall Pump and Compressor Company in Quincy, Illinois. In the years after World War I, George Gille, John Kathe and George Wall of Quincy, Ill., designed a new vacuum pump.
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