US 12,220,560 B2
Needle assisted injection device having reduced trigger force
Thomas Kramer, Andover, MN (US); Matthew H. Rust, Hudson, WI (US); Paul M. Goudreau, St. Paul, MN (US); Peter A Hoeft, Seattle, WA (US); Julius C. Sund, Plymouth, MN (US); Peter L. Sadowski, Woodbury, MN (US); Michael Travanty, S. Minneapolis, MN (US); and Patrick Madsen, Litchfield, MN (US)
Assigned to Antares Pharma, Inc., Ewing, NJ (US)
Filed by Antares Pharma, Inc., Ewing, NJ (US)
Filed on Aug. 11, 2022, as Appl. No. 17/819,171.
Application 17/819,171 is a continuation of application No. 16/436,377, filed on Jun. 10, 2019, granted, now 11,446,440.
Application 16/436,377 is a continuation of application No. 15/155,804, filed on May 16, 2016, granted, now 10,357,609, issued on Jul. 23, 2019.
Application 15/155,804 is a continuation of application No. 13/889,190, filed on May 7, 2013, granted, now 9,364,611, issued on Jun. 14, 2016.
Claims priority of provisional application 61/776,283, filed on Mar. 11, 2013.
Claims priority of provisional application 61/763,395, filed on Feb. 11, 2013.
Claims priority of provisional application 61/643,845, filed on May 7, 2012.
Claims priority of provisional application 61/643,659, filed on May 7, 2012.
Prior Publication US 2022/0379031 A1, Dec. 1, 2022
Int. Cl. A61M 5/20 (2006.01); A61M 5/30 (2006.01); A61M 5/31 (2006.01); A61M 5/32 (2006.01); A61M 5/50 (2006.01)
CPC A61M 5/2033 (2013.01) [A61M 5/20 (2013.01); A61M 5/2053 (2013.01); A61M 5/30 (2013.01); A61M 5/5086 (2013.01); A61M 2005/2013 (2013.01); A61M 2005/2026 (2013.01); A61M 2005/208 (2013.01); A61M 2005/3125 (2013.01); A61M 5/326 (2013.01); A61M 2202/0007 (2013.01); A61M 2202/048 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An injector, comprising:
a housing extending along a longitudinal axis;
a medicament container disposed within the housing and containing a volume of a medicament;
a trigger mechanism including:
a floating trigger member rotatable about the longitudinal axis between a pre-firing condition and a firing condition and having a retaining portion, and
a ram assembly having a ram configured to pressurize the medicament container for expelling the medicament therefrom and a floating trigger engagement member configured to engage the retaining portion of the floating trigger member when the floating trigger member is in the pre-firing condition;
an energy source associated with the ram configured to move the ram relative to the medicament container to expel the medicament; and
a user-operable firing-initiation member configured to move the floating trigger member from the pre-firing condition to the firing condition where the floating trigger engagement member is released from the retaining portion to allow the energy source to fire the ram,
wherein the energy source is coupled to the housing and decoupled from the user-operable firing-initiation member.