Patent ID: 7331360
Filing Date: 2008-02-19
Classification: F16K,Y10T

Abstract:
1. A check valve comprising: a body, an outlet that connects to the body at a first seam between the body and the outlet, anin let that connects to the body at a second seam between the inlet and the body; a first holder and a second holder on the outlet with a first alignment tab on the outlet; a plurality of first flapper attachments on a first flapper mount shelf on the outlet; a first ridge that surrounds the first flapper mount shelf on the outlet provides for a seal between the body and the outlet; a first alignment notch that is disposed about the first ridge and formed into the first ridge, the first alignment tab, fits into the first alignment notch to properly align outlet and the body during assembly, the first ridge seats into outlet; a first flap and a second flap, the first flap and the second flap have a plurality of holes, the first flap and the second flap are placed on the plurality of first flapper attachments at the plurality of holes leaving a gap between the first flap and second flap; a second flapper seat, a second seat groove and a second flapper mount shelf, the second seat groove surrounds the second flapper seat all on the outlet; a third holder that is a molded part of the body, a second alignment tab disposed about a body entrance end on the body; a second flapper mount shelf surrounds the second seat groove and has a second plurality of flapper attachments, the second plurality of flapper attachments are in the shape of pins, a second ridge surrounds the second flapper mount shelf and provides for the seal between the body and the inlet, a second alignment notch is disposed about the second ridge and is formed into the second ridge, the second alignment tab fits into the second alignment notch to properly align the body and inlet during assembly, the second ridge seats into body and glue is applied to form a permanent connection between inlet and body; and a third flap having a third plurality of holes, the third flap is placed on the second plurality of flapper attachments at the third plurality of holes and the third flap seals an inlet inside diameter.