US 11,913,569 B1
Serviceable ball check valve
Christopher W. Mason, Granger, IN (US)
Assigned to NIBCO Inc., Elkhart, IN (US)
Filed by NIBCO Inc., Elkhart, IN (US)
Filed on Sep. 27, 2022, as Appl. No. 17/953,629.
Int. Cl. F16K 43/00 (2006.01); F16K 15/18 (2006.01); F16K 15/02 (2006.01)
CPC F16K 43/001 (2013.01) [F16K 15/1848 (2021.08); F16K 15/025 (2013.01); Y10T 137/7843 (2015.04)] 20 Claims
OG exemplary drawing
 
1. A valve assembly, comprising:
a body having a fluid passageway extending between an incoming fitting end and an outgoing fitting end;
a rotary first valve member in the fluid passageway; and
a spring biased reciprocating check valve insert positioned in the fluid passageway between said first valve member and said outgoing fitting end, said spring check valve insert including a dual lobed seal that concurrently contacts a first sealing retainer section of the spring check valve insert, a second sealing retainer, and a stopper when the spring biased reciprocating check valve is in a closed position.