Patent ID: 6827708
Filing Date: 2004-12-07
Classification: A61M

Abstract:
A device for administering an injectable product in doses, comprising:a) a casing having a reservoir for the product; b) a piston which forces product out of the reservoir when moved in a feed direction towards an outlet of the reservoir; c) a driven rod which moves the piston in the feed direction; d) a drive member which may be moved in and counter to the feed direction relative to the casing and which slaves the driven rod when moved in the feed direction; and e) at least one blocking means which co-operates with the driven rod and the casing, such that the blocking means prevents the driven rod from moving counter to the feed direction relative to the casing and allows the driven rod to move in the feed direction, wherein f) a friction lock exists between the blocking means and one of the driven rod and the casing, said friction lock preventing the driven rod from moving counter to the feed direction by self-locking.