Oscillating piston pump with working piston held spring-loaded in output position

摘要

The end regions of the casing (41, 42) form electromagnetic poles. The air gaps are positioned in the pole regions (35, 36) of the sleeve (20) guiding the working piston. The metal casing can be made of laminations or solid parts, and can consist of two seamless sheet metal parts, which support themselves on the pole region (35, 36) of the sleeve (20) surrounding the working piston. The sheet metal parts forming the casing parts (41, 42) are designed at their mutually facing butting ends, as a plug connection partially including the end region of the sleeve, with a fork shaped female similar part at one casing part and a male similar part corresp. to this at the other casing part.