US 11,773,992 B2
Backflow prevention assembly with a linkage
Peter P. Bouchard, Ayer, MA (US); and Kevin Simon, Somerville, MA (US)
Assigned to Watts Regulator Co., North Andover, MA (US)
Filed by Watts Regulator Co., North Andover, MA (US)
Filed on Dec. 30, 2021, as Appl. No. 17/566,278.
Application 17/566,278 is a continuation in part of application No. 17/402,737, filed on Aug. 16, 2021.
Claims priority of provisional application 63/066,411, filed on Aug. 17, 2020.
Prior Publication US 2022/0412474 A1, Dec. 29, 2022
Int. Cl. F16K 15/03 (2006.01); E03B 7/07 (2006.01)
CPC F16K 15/033 (2013.01) [E03B 7/077 (2013.01); F16K 2200/101 (2021.08)] 12 Claims
OG exemplary drawing
 
1. A check valve for a backflow prevention assembly, comprising:
a flexible linkage with platform having a proximal end and a distal end;
a first coupling member supported by the platform for engaging a spring retention assembly, the first coupling member centrally located above the platform by a strut;
a stop protruding from the proximal end of the platform to engage a portion of the check valve for limiting travel of the platform;
a branch depending from the proximal end of the platform, the branch having a hinge pin configured to nest in a slot defined by the check valve; and
a second coupling member depending from the distal end of the platform for engaging a valve member.