US 12,465,796 B2
Normally closed valve for dry pipe trim on a diaphragm valve
James O. Williams, Marlborough, MA (US); Joshua Motha, Tiverton, RI (US); and Normand James Roy, Coventry, RI (US)
Assigned to Tyco Fire Products LP, Cranston, RI (US)
Appl. No. 17/917,494
Filed by Tyco Fire Products LP, Lansdale, PA (US)
PCT Filed May 21, 2021, PCT No. PCT/IB2021/054452
§ 371(c)(1), (2) Date Oct. 6, 2022,
PCT Pub. No. WO2021/234669, PCT Pub. Date Nov. 25, 2021.
Claims priority of provisional application 63/028,820, filed on May 22, 2020.
Prior Publication US 2023/0145382 A1, May 11, 2023
Int. Cl. A62C 35/68 (2006.01); F16K 31/122 (2006.01)
CPC A62C 35/68 (2013.01) [F16K 31/1221 (2013.01); F16K 31/1223 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A valve assembly, comprising:
a body comprising:
a first section defining a first opening having a larger diameter portion structured to receive a portion of a conduit and a smaller diameter portion inward from the larger diameter portion;
a second section defining a chamber, a second opening, and a pressure port; and
a third section defining a third opening and a release port, the second section between the first section and the third section;
a spring positioned within the third opening;
a spacer positioned within the third opening and coupled with the spring;
an interfacing member positioned partially within the third opening and coupled with the spacer;
a connecting rod positioned partially within the second opening and the chamber and coupled with the interfacing member; and
a plunger positioned within the chamber and coupled with the connecting rod, the spring to bias the plunger to a first state in which the first opening is sealed from the chamber, the plunger to change from the first state to a second state to control fluid flow through the body, the plunger configured to move to the second state, in which the first opening is open to the chamber, based on a first force exerted on the plunger by a fluid received through the pressure port being greater than a second force exerted by the spring on the plunger.