US 12,410,869 B2
Two-pin clapper check valve
Nadiya V. Fuller, Plano, TX (US); and Brian C. Witkowski, Weatherford, TX (US)
Assigned to SPM Oil & Gas Inc., Fort Worth, TX (US)
Filed by SPM Oil & Gas Inc., Fort Worth, TX (US)
Filed on Aug. 28, 2023, as Appl. No. 18/456,553.
Claims priority of provisional application 63/378,544, filed on Oct. 6, 2022.
Prior Publication US 2024/0117889 A1, Apr. 11, 2024
Int. Cl. F16K 15/03 (2006.01)
CPC F16K 15/03 (2013.01) 18 Claims
OG exemplary drawing
 
1. A clapper valve assembly, comprising:
a valve body defining a longitudinal flow bore;
a hanger disposed in the valve body and including a slot;
a link piece, including:
a link body; and
first and second pin holes defined in the link body;
a first pin disposed in both the slot of the hanger and the first pin hole of the link body,
wherein the first pin defines a first rotation axis, and
wherein the link piece is configured to rotate about the first rotation axis;
a clapper, including:
a clapper body;
a third pin hole defined in the clapper body; and
a seal;
a second pin disposed in both the second pin hole of the link body and the third pin hole of the clapper body,
wherein the second pin defines a second rotation axis,
wherein the clapper is configured to rotate about the second rotation axis, and
wherein a fit between the first pin and the slot of the hanger has greater clearance than a fit between the second pin and the third pin hole of the clapper body; and
a valve seat disposed in the valve body.