Patent ID: 7779859
Filing Date: 2010-08-24
Classification: B64D,F16K,Y10T

Abstract:
1. A check valve for disposal in a duct, the check valve comprising: a valve body having a flow channel extending therethrough, a first stop support, and a second stop support, the first and second stop supports extending axially from the valve body; a stop bar coupled to and extending between the first and the second stop supports; a flapper rotationally mounted to the valve body, the flapper comprising a first material and including an upstream side, a downstream side, a mount hole, and a depression, the mount hole extending between the upstream side and the downstream side, and the depression formed in the downstream side in communication with the mount hole; and a protrusion injection molded into the flapper and extending axially therefrom, the protrusion comprising a second material that is non-metallic and different than the first material and including a mount portion, a connector portion, and a contact portion, the mount portion disposed on the upstream side of the flapper, the connector portion extending through the mount hole, and the contact portion disposed within and extending away from the depression, wherein the flapper is moveable between a closed position, in which the flapper at least substantially seals the flow channel, and a fully-open position, in which the contact portion of the protrusion contacts the stop bar and the flapper unseals the flow channel.