Flow-actuated bleed valve

Claim 2

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, said wall having an opening therethrough between said inlet and said outlet, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, means defining a passageway communicating with said main gas flow path between said inlet and said outlet and with said port, said passageway and said port defining a secondary gas flow path communicating with said main gas flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure for said port, means for moving said shutter axially toward and away from said port, an arm supported for pivotal movement about said axis and operably connected to said shutter within said chamber, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.

Claim 3

The combination defined in claim 1 including a bleed tube intersecting said wall between said inlet and said outlet, said tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main flow path, said tube defining said passageway.

Claim 4

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main gas flow path and defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, means for biasing said shutter toward said open position, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter toward and to said closed position.

Claim 5

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main gas flow path and defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, means for biasing said shutter toward said open position, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter toward and to said closed position.

Claim 6

The combination defined in claim 3 including means for adjusting said biasing means to vary the biasing force acting upon said shutter.

Claim 7

The combination as set forth in claim 3 wherein said vane has a generally conical body portion converging in the general direction of gas flow in said main gas flow path when the axis of said body portion is in general parallel alignment with said direction of gas flow.

Claim 8

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main gas flow path and defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, a vane carried by said one portion and disposed in said main gas flow path, and means for conterbalancing said arm relative to said axis, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.

Claim 9

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main gas flow path and defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, a vane carried by said one portion and disposed in said main gas flow path, and means for conterbalancing said arm relative to said axis, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.

Claim 10

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, said a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main gas flow path and defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure for said port to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereOf disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.

Claim 11

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, said a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof communicating with said main gas flow path and defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure for said port to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereOf disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.

Claim 12

The combination defined in claim 7 including means for axially moving said shutter generally toward and away from said port.

Claim 13

The combination defined in claim 7 wherein said shutter is supported in said chamber, said shutter in said closed position being disposed between said port and said one end portion.

Claim 14

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof terminating at an opening communicating with said main gas flow path, said bleed tube defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions, said vane in a position corresponding to said open position being spaced from said opening in a direction opposite the direction of gas flow in said main gas flow path.

Claim 15

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof communicating with said port and the other end portion thereof terminating at an opening communicating with said main gas flow path, said bleed tube defining a secondary flow path through said chamber between said port and said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said duct and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions, said vane in a position corresponding to said open position being spaced from said opening in a direction opposite the direction of gas flow in said main gas flow path.

Claim 16

The combination defined in claim 10 wherein said tube has its axis inclined to the direction of said main flow path.

Claim 17

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof extending for some distance into said duct and terminating at an opening disposed in a plane generally parallel to the direction of said main flow path in the vicinity of said opening, said bleed tube communicating with said main flow path and defining a secondary flow path from said port through said chamber and to said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said ducT and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.

Claim 18

In a gas conveying system the combination comprising a duct having a wall and including an inlet and an outlet, said duct defining a main gas flow path therethrough, and a bleed valve including an inwardly opening housing mounted on the outer surface of said wall and cooperating therewith to define a chamber, said housing having an outwardly opening port, a bleed tube at least partially disposed within said chamber and intersecting said wall between said inlet and said outlet, said bleed tube having one end portion thereof extending for some distance into said duct and terminating at an opening disposed in a plane generally parallel to the direction of said main flow path in the vicinity of said opening, said bleed tube communicating with said main flow path and defining a secondary flow path from said port through said chamber and to said main flow path, a shutter for controlling the flow of gas in said secondary path and supported for pivotal movement about an axis extending transversely of the direction of gas flow in said main path through a range of positions between open and closed positions corresponding respectfully to conditions of maximum flow and no flow in said secondary path, said shutter in said closed position providing a closure to prevent gas flow in said secondary flow path, an arm supported for pivotal movement about said axis and operably connected to said shutter, said arm extending through an opening in said wall and having one portion thereof disposed in said ducT and another portion thereof disposed in said chamber, and a vane carried by said one portion and disposed in said main gas flow path, said vane and said arm being responsive to gas flow in said main path for moving said shutter between its open and closed positions.