Valve

Claim 2

A valve for controlling flow of liquid from a supply into a vessel, the valve comprising means defining a silencing chamber, an inlet member for connection to said supply, and an outlet, the inlet member opening laterally into said chamber below the outlet and the chamber extending downwardly below the region where the inlet opens into the chamber, and the chamber in use being liquid filled, a valve seat, a valve closure member co-operating with said seat to control flow of liquid through the inlet member into the chamber, means for displacing the closure member relatively to the valve seat between a closed position in which the member bears on the seat and an open position in which the seat and member are spaced apart, the arrangement being such that, in use, when the valve is open, the incoming liquid flows into the liquid filled silencing chamber before flowing into said vessel via said outlet.

Claim 3

A valve according to claim 1, in which the inlet member has a flared mouth which flared mouth opens into said chamber and constitutes said seat.

Claim 4

A valve according to claim 1, and including means for creating turbulance in the liquid flowing into said chamber through the inlet member.

Claim 5

A valve according to claim 3 in which said inlet member has a flared mouth which flared mouth opens into said chamber and constitutes said seat, and in which said means for creating turbulance is formed on said closure member.

Claim 6

A valve according to claim 4, in which said means for creating turbulance comprises at least one circular rib formed on said valve closure member.

Claim 7

A valve according to claim 5, in which said circular rib seats on said flared mouth to close the valve.

Claim 8

A valve according to claim 5, in which said means for creating turbulance comprises a pair of circular ribs, said ribs being spaced apart and having a concave depression between them.

Claim 9

A valve according to claim 1, in which an anti-syphoning aperture is formed in the wall of said chamber which leads into said chamber above said inlet and below said outlet.

Claim 10

A valve for controlling flow of liquid from a supply into a vessel, the valve comprising means defining a silencing chamber, an inlet member for connection to said supply, and an outlet, the inlet member opening into said chamber below the outlet and the chamber, in use, being liquid filled, a valve seat, a valve closure member co-operating with said seat to control flow of liquid through the inlet member into the chamber, and a cam operated by a float arm for displacing the closure member relatively to the valve seat between a closed position in which the member bears on the seat and an open position in which the seat and member are spaced apart, the cam being arranged to be displaced linearly by the float arm and including a cam surface which co-operates with said member, the cam surface having means shaped so as to obtain rapid closing-off initially and slower closing-off during the final stages of closing, the arrangement being such that, in use, when the valve is open, the incoming liquid flows into the liquid filled silencing chamber before flowing into said vessel via said outlet.

Claim 11

A valve for controlling flow of liquid from a supply into a vessel, the valve comprising means defining a silencing chamber, an inlet member for connection to said supply, and an outlet, the inlet member opening into said chamber below the outlet and the chamber, in use, being liquid filled, a valve seat, a valve closure member co-operating with said seat to control flow of liquid through the inlet member into the chamber, and a cam operated by a float arm for displacing the closure member relatively to the valve seat between a closed position in which the member bears on the seat and an open position in which the seat and member are spaced apart, the cam being arranged to be displaced linearly by the float arm and including a cam surface which co-operates with said member, the cam surface having means shaped so as to obtain rapid closing-off initially and slower closing-off during the final stages of closing, the arrangement being such that, in use, when the valve is open, the incoming liquid flows into the liquid filled silencing chamber before flowing into said vessel via said outlet.

Claim 12

A valve for controlling flow of liquid from a supply into a vessel, the valve comprising walling defining a chamber having a first upright limb, a second upright limb laterally positioned with respect to the first limb and an overhead passage connecting the upper ends of the limbs, an inlet member leading to an inlet formed in the walliNg of the first limb below the junction between the overhead passage and the first limb, the limbs and passage forming a substantially unrestricted flow path from said inlet to the free end of the second limb, an anti-syphoning aperture in the walling of said first limb above the inlet and below said junction for placing the first limb in communication with atmosphere, a valve closure member, a valve seat encircling said inlet, and means for urging said member against said seat to close off communication between the inlet member and the first limb.

Claim 13

A valve for controlling flow of liquid from a supply into a vessel, the valve comprising walling defining a chamber having a first upright limb, a second upright limb laterally positioned with respect to the first limb and an overhead passage connecting the upper ends of the limbs, an inlet member leading to an inlet formed in the walliNg of the first limb below the junction between the overhead passage and the first limb, the limbs and passage forming a substantially unrestricted flow path from said inlet to the free end of the second limb, an anti-syphoning aperture in the walling of said first limb above the inlet and below said junction for placing the first limb in communication with atmosphere, a valve closure member, a valve seat encircling said inlet, and means for urging said member against said seat to close off communication between the inlet member and the first limb.

Claim 14

A valve according to claim 10, in which said inlet opens laterally into said first limb and said closure member extends across the first limb and is guided in a bore of that vertical wall of the first limb opposed to the wall through which said inlet opens, there being externally of said first limb, and laterally thereof, cam means for displacing said closure member into engagement with said seat.

Claim 15

A valve according to claim 11, in which said closure member is free-floating, said cam means displacing it into engagement with said seat, and the pressure in said inlet urging it against the cam.

Claim 16

A valve according to claim 12, in which said closure member includes a finned portion passing through said seat and entering said inlet member to guide the closure member during its opening and closing movements.