An injector/ejector system that provides for easy insertion and removal of a printed circuit board module into and out of a mainframe. The injector/ejector system is defined by a unitary lever arm and two curved finger extensions oppositely situated and which is attached to a front panel...http://www.google.com/patents/US5669512?utm_source=gb-gplus-sharePatent US5669512 - Inject-eject system for rack mounted plug-in modules
