US 12,460,899 B2
Pneumatic projectile launching system
Benjamin Noji, Landenberg, PA (US); and Rodd Rambo, Smyrna, DE (US)
Assigned to Polarstar Engineering & Machine, LLC, Newark, DE (US)
Filed by POLARSTAR ENGINEERING & MACHINE LLC, Newark, DE (US)
Filed on Jan. 8, 2024, as Appl. No. 18/407,070.
Application 18/407,070 is a continuation of application No. 17/676,326, filed on Feb. 21, 2022, granted, now 11,867,476.
Application 17/676,326 is a continuation of application No. 17/004,086, filed on Aug. 27, 2020, granted, now 11,255,632, issued on Feb. 22, 2022.
Claims priority of provisional application 62/913,901, filed on Oct. 11, 2019.
Prior Publication US 2025/0027745 A1, Jan. 23, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. F41B 11/00 (2013.01); F41B 11/723 (2013.01)
CPC F41B 11/723 (2013.01) 4 Claims
OG exemplary drawing
 
1. A pneumatic valve mechanism comprising:
a volume chamber;
a valve positioned within the volume chamber, the valve moveable between an exhaust position wherein flow through from the volume chamber through the valve is facilitated while flow into the volume chamber from a fill port is prevented and a filling position wherein flow through from the volume chamber through the valve is prevented while flow into the volume chamber from the fill port is facilitated, the valve being biased to the exhaust position;
a sear having a catch surface configured to engage a surface of the valve to retain the valve in the filling position and to release the valve into the exhaust position when actuated; and
a secondary sear having a catch surface configured to engage the surface of the valve to retain the valve in the filling position and to release the valve into the exhaust position when actuated, wherein the catch surface of the secondary sear is located rearward of the catch surface of the sear so that the catch surface of the secondary sear does not engage the surface of the valve when the sear is engaged.