POWER DEVICE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; jacks or power equipment of hydraulic presses and other devices intended for building working pressures. SUBSTANCE: power member has support base and telescopic member (punch) with flexible tubular chamber installed along longitudinal axis of device with unions to deliver working agent and let out air secured in load-boosting holders. The latter are made in form of trapezoidal section prisms whose side chamfered faces engage with inner surface of end face sections of split parts of housing to provide displacement of holders along longitudinal axis of power member and are arranged between guide posts connected with split parts of housing. Guide posts are rigidly coupled with support base and guide cheeks provided with cross projections located in grooves on outer side surface of telescopic punch. End face sections of split parts of housing have chamfers inclined relative to longitudinal axis of device at angle equal to angle between large base of trapezium of load-boosting holder and its sides. EFFECT: improved efficiency and reliability of operation. 7 cl, 4 dwg