A motor controller for providing a constant rate of change of pressure during inflation and deflation of an expandable member of a catheter for use in a body lumen by an automated inflation system is disclosed. The system conforms the rate of change of pressure to a set point value by means of a feedback...http://www.google.com.au/patents/US5599301?utm_source=gb-gplus-sharePatent US5599301 - Motor control system for an automatic catheter inflation system
