Patent 9168339 was granted and assigned to Owen Mumford Corporate on October, 2015 by the United States Patent and Trademark Office.
In an injection device a rotary indicator element (20) indexes angularly between a pre-firing position to an injection complete position to create a visual and audible/tactile signal as the drive plunger (28) arrives at or near its fired position. The indicator element (20) has a saw tooth profile which co-operates with respective abutments (34, 40) on the plunger and a housing part of the device to control and energise indicator movement.