초록 ▼

A valve which works without friction is provided which includes a movable obturating member and an annular seat. The annular seat is secured to a base by means of a support. The obturating member, preferably a ball, is set in a support which is fixed in the central opening of a substantially flat ci

A valve which works without friction is provided which includes a movable obturating member and an annular seat. The annular seat is secured to a base by means of a support. The obturating member, preferably a ball, is set in a support which is fixed in the central opening of a substantially flat circular flexible membrane. The circular membrane is secured in a prestressed condition, in a plane parallel to the plane of the annular seat with the obturating ball member coaxial to the seat, by welding the contour of the membrane to the base. The membrane is mechanically isotropic so as to be radially rigid in the plane thereof and deformable in the direction perpendicular to its plane. Deformation of the circular membrane in directions perpendicular to its plane cause the obturating ball member to move into and away from the annular seat to interrupt and allow fluid flow therethrough. The prestressed condition of the membrane exerts a restoring force which causes the obturating ball member to seat in the annular seat. Deformation of the circular membrane is accomplished without any friction between the obturating ball member and its support, the contour of the membrane and the base and the obturating ball member and the annular seat.

대표청구항 ▼

A valve comprising: a base; a conjugated annular seat including a support to secure said conjugated annular seat to said base and a truncated seat; a substantially flat flexible circular membrane having a central circular opening, said circular membrane being mechanically isotropic about the center

A valve comprising: a base; a conjugated annular seat including a support to secure said conjugated annular seat to said base and a truncated seat; a substantially flat flexible circular membrane having a central circular opening, said circular membrane being mechanically isotropic about the center thereof, elastically deformable in a direction perpendicular to the plane of said circular membrane, and substantially rigid in any radial direction of the plane of said circular membrane; a support secured by welding in said central circular opening to constrain said support in said circular membrane; an obturating ball member fixed in said support for movement in a direction perpendicular to the plane of said truncated seat to permit said obturating ball member to move into and away from said truncated seat to interrupt and allow fluid flow through said truncated seat, respectively; and wherein said circular membrane is secured to said base in a prestressed condition by welding the contour of said circular member to said base to contain said circular membrane in said base, said circular membrane being secured in a plane parallel to the plane of said truncated seat with said obturating ball member centered in confronting relation with said truncated seat, and wherein the prestressed condition of said circular membrane exerts a restoring force on said obturating ball member to cause said obturating ball member to seat in said truncated seat.