Patent ID: 8074963

Claim:
A fluid flow shut-off and control device ( 1 ), comprising: a body ( 2 ) having a section (S) for passage of fluid; a hand lever ( 3 ), the hand lever arranged to shut off the section to prevent the passage of the fluid, the body extending axially and defining two opposite first end ( 2 A) and second end ( 2 B) for connection to first and second pipes respectively; a rotatable ring nut ( 7 ), the ring nut provided with a female screw which will screw onto a corresponding threaded part of a component with a male thread, the ring nut having teeth ( 8 ) disposed in a circle; a flange ( 4 ) located on the first end ( 2 A) of the body, the flange ( 4 ) having two projecting couplings ( 4 A, 4 B) parallel to each other and defining a front projection ( 4 A) and a rear projection ( 4 B), the teeth ( 8 ) of the ring nut engaged between the front and rear projections, the ring nut being retained by the front projection and being rotatable about the first end by the teeth rotating about the front and rear projections, wherein, the front projection is i) chamfered on a first side to facilitate entry of the teeth ( 8 ) into the flange ( 4 ) during assembly of the ring nut ( 7 ) with the body ( 2 ), and ii) has a non-return surface on a second side to retain said ring nut and ensure non-return of said ring nut, and the rear projection ( 4 B) prevents sliding of the ring nut ( 7 ) onto the body ( 2 ), the rear projection holding the ring nut in place during rotation of the ring nut on the flange.