1. Zimmern B. Worm rotary compressors with liquid joints. U.S. patent no. 3133695; 1965.
2. Potential of the single-screw compressor;Haselden;International Journal of Refrigeration,1985
3. Zimmern B, Patel GC. Design and operating characters of the Zimmern single screw compressors. In: Proceedings of Purdue compressor technology conference; 1972. p. 96–9.
4. Zimmern B. Method and a screw machine for processing fluid under high pressure with liquid injection between a sealing portion and support portion of the gate rotor. U.S. patent no. 4900239; 1990.
5. Zimmern B. Single screw compressor with liquid lock preventing slides. U.S. patent no. 6106241; 2000.