초록 ▼

An improved valve of the flapper plate type is disclosed, the valve comprising at least one flexible member for connecting the flapper plate and the arm actuating the flapper. The flexible member absorbs impact energy and allows restricted three dimensional movement of the flapper plate. The seals f

An improved valve of the flapper plate type is disclosed, the valve comprising at least one flexible member for connecting the flapper plate and the arm actuating the flapper. The flexible member absorbs impact energy and allows restricted three dimensional movement of the flapper plate. The seals for the flapper plate and the seat comprise electrically conductive sealing materials.

대표청구항 ▼

A flapper valve comprising a valve housing having a flow passage therethrough; a valve seat positioned in the flow passage so as to accommodate a flapper plate member, the valve seat comprising a peripheral seal of conductive material on its engaging surface; a flapper plate member comprising a seal

A flapper valve comprising a valve housing having a flow passage therethrough; a valve seat positioned in the flow passage so as to accommodate a flapper plate member, the valve seat comprising a peripheral seal of conductive material on its engaging surface; a flapper plate member comprising a sealing surface, the flapper plate member being positioned in the housing so that the sealing surface of the member may move alternately out of and into sealing contact with the seal on said seat, the flapper plate member comprising a conductive sealing material bonded to its engaging surface; actuating means comprising a rotatable shaft disposed in said housing on an axis transverse to said flow passage and an arm member pivoted on said shaft in said housing for opening and closing the valve by bringing the flapper plate member out of and into sealing contact with the seat, the arm member being connected to the flapper plate member through means for absorbing impact energy from the flapper plate member and allowing restricted three dimensional movement of said plate member, said means for absorbing impact energy and allowing restricted three dimensional movement comprising at least one flexible energy absorbing member.