US 12,420,021 B2
Device for intraocular injection
Vijay R Balan, Torrance, CA (US); and Nico J. Slabber, Eastvale, CA (US)
Assigned to NEW WORLD MEDICAL, INC., Rancho Cucamonga, CA (US)
Filed by NEW WORLD MEDICAL, INC., Rancho Cucamonga, CA (US)
Filed on Nov. 16, 2023, as Appl. No. 18/511,668.
Application 18/511,668 is a continuation of application No. 17/187,110, filed on Feb. 26, 2021, granted, now 11,844,934.
Application 17/187,110 is a continuation of application No. 16/706,538, filed on Dec. 6, 2019, granted, now 10,946,145, issued on Mar. 16, 2021.
Application 16/706,538 is a continuation of application No. PCT/US2019/027358, filed on Apr. 12, 2019.
Claims priority of provisional application 62/656,818, filed on Apr. 12, 2018.
Prior Publication US 2024/0082500 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/315 (2006.01); A61B 17/3211 (2006.01); A61M 5/31 (2006.01)
CPC A61M 5/31563 (2013.01) [A61B 17/3211 (2013.01); A61M 5/31581 (2013.01); A61M 5/31585 (2013.01); A61M 2005/3114 (2013.01); A61M 2210/0612 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A medical instrument, comprising:
a housing;
a tool section coupled to the housing;
an interior cavity disposed in the housing;
a piston disposed in the interior cavity;
an interior chamber disposed in the interior cavity;
a button coupled to the piston and disposed on the housing, wherein the button is configured to actuate the piston for pumping fluid through the housing;
a pre-fill chamber;
a sealing member having a first spiral ramp, wherein the sealing member is configured to seal the pre-fill chamber; and
an interface member having a second spiral ramp that slidingly engages with the first spiral ramp, wherein the interface member has a proximal end, a distal end, a connector at the proximal end configured to couple to a fluid source, a projection at the distal end extending through an opening of the sealing member and a fill port on a lateral side of the projection.