Born from a tree-service equipment problem, Davey Compressor Company has made air compressors since its incorporation in 1929, beginning with the first portable, air-cooled compressor. Today the company focuses on rotary sliding-vane compressors built around its patented Perma-Vane air-end, a simple design with one continuously moving part that is serviceable in the field. Davey manufactures many components in-house and tests each completed machine before it leaves the factory.