Robert L Lister

US Patent:

8409138, Apr 2, 2013

Filed:

Mar 5, 2008

Appl. No.:

12/529788

Inventors:

Adrian Benton James - Oakland CA, US
Robert Ian Lister - Sunnyvale CA, US
Paul Joseph Silberschatz - San Francisco CA, US
Brian Joseph Mason - Menlo Park CA, US

Assignee:

Eli Lilly and Company - Indianapolis IN

International Classification:

A61M 5/00

US Classification:

604110, 604210, 606272

Abstract:

A delay mechanism for staging the operation of an automatic injection apparatus () to ensure medication contents are properly delivered prior to the needled syringe () of the apparatus being retracted. In one form, the delay mechanism includes a shuttle (), a follower (), a locking member, a damping compound, and a driver and a driver biasing element (). The shuttle is for a needled syringe of the apparatus and includes a first latching element. The follower includes a second latching element and a cammable surface, which second latching element is for cooperating with the first latching element to limit motion of the shuttle relative to the follower in a second direction opposite the first direction. The locking member is movable from a locking position to a release position by engagement with the syringe plunger during an injection, the locking member, when in the locking position, preventing rotation of the follower relative to the shuttle, the locking member, when in the release position, allowing rotation of the follower relative to the shuttle. The damping compound is between the follower and a supporting surface to dampen rotation of the follower relative to the shuttle.