Rotary valve
AssigneeCarmo Holdings APS
InventorAnders Johnsen
Life of this patent
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Abstract
A two-component rotary valve for controlling the fluid flow through a fluid conduit, the rotary valve being injection-moulded in two steps with no need for assembly after the injection moulding procedure. The rotary valve comprises a valve house with a plug inside it, and the rotary valve has sealing means in the form of local variations in the radius of the plug and house along their lengths. Thereby, a rotary valve is obtained which does not require a viscous sealant, such as silicone, to eliminate the risk of leakage, when the valve is open.
Claims11
A two-component rotary valve (100) for controlling a fluid flow through said rotary valve (100), said rotary valve (100) comprising:
- a valve house (110) comprising a fluid inlet (120), a house body (130), and a fluid outlet (140), said house body (130) being hollow and comprising an inside house wall (136) described by an inner radius (R, R′);
- and
- a plug (150) comprising a plug tube (152) with an outer plug wall (160) described by an outer radius (T, T), an opening channel (170), and a lever (180), said plug tube (152) being placed at least partially inside said house body (130) such that at least part of said outer plug wall (160) is in contact with said inside house wall (136), said plug (150) being adapted to be rotatable within said house body (110),
- wherein the house body (130) comprises two rotary symmetrical secondary sealing lips disposed on opposite ends of the house body to seal against corresponding sealing grooves formed in the outer plug wall (160), and
- wherein there is at least one rotary position of the plug (150) relative to the valve house (110) for which a contour of the outer plug wall (160) matches a contour of the inside house wall (136).
A two-component rotary valve (100) for controlling a fluid flow through said rotary valve (100), said rotary valve (100) comprising:
- a valve house (110), said valve house (110) comprising a fluid inlet (120), a house body (130), and a fluid outlet (140), said house body (130) being hollow and comprising an inside house wall (136) described by an inner radius (R, R′);
- and
- a plug (150), said plug (150) comprising a plug tube (152) with an outer plug wall (160) described by an outer radius (T, T), an opening channel (170), and a lever (180), said plug tube (152) being placed at least partially inside said house body (130) such that at least part of said outer plug wall (160) is in contact with said inside house wall (136), said plug (150) being adapted to be rotatable within said house body (110), said inside house wall (136) comprising multiple sealing means encircling an inner opening of the fluid inlet (124) and an inner opening of the fluid outlet (144), respectively,
- wherein said plug (150) comprises two flanges (153,153′) contacting a first end of the house body (132) and a second end of the house body (134), respectively, and
- wherein said two flanges (153,153′) comprise end sealing lips (165′, 165″), said end sealing lips (165′, 165″) contacting end sealing grooves (166′, 166″) comprised in the first end of the house body (132) and the second end of the house body (134), respectively.
A method for creating a two-component rotary valve (100) comprising:
- injection moulding of a first component;
- injection moulding of a second component, wherein the injection moulding of the second component comprises either a form of inner moulding or over moulding, and wherein a surface of the first component contacting a surface of the second component defines a shape of the surface of the second component;
- and
- cooling the first component and the second component of said rotary valve (100) after moulding, wherein cooling the first component and the second component controls a shrinking thereby improving a seal of said rotary valve (100) created by a sealing means between the first component and the second component,
- wherein a contact force between the first component and the second component is higher at the sealing means when the sealing means are engaged than away from the sealing means due to the first component and the second component being cast at separate times during production of the rotary valve (100) and thereby having different shrink rates and creating a tight seal.
Dependencies are inferred from the claim text.