Rotary valve
AssigneeCarmo Holdings APS
InventorAnders JOHNSEN
Life of this patent
Estimating the term…
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.
Claims24
A two-component rotary valve (100) for controlling the 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);
- and 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);
- and
- 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);
- and
- said plug (150) being adapted to be rotatable within said house body (110), said rotary valve (100) being characterized by comprising sealing means in the form of local variations of the inner radius (R,R) of the inside house wall (136) and local variations in the outer radius (T, T) of 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 the contour of outer plug wall (160) matches the contour of the inside house wall (136), and
- wherein at least for one rotational position of the plug (150) relative to the valve house (110) there will be at least one point where the outer radius (T, T) of the outer plug wall (160) is equal to or larger than the inner radius (R, R′) of the inside house wall (136), thereby creating a tight seal.
A two-component rotary valve (100) for controlling the 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);
- and 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);
- and 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);
- and
- 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;
- and
- said plug (150) comprising two flanges (153, 153′) contacting a first end of the house body (132) and a second end of the house body (134), respectively;
- and
- said flanges (153, 153′) comprising end sealing lips (165′, 165″), said end sealing lips (165′, 165″) contacting end sealing grooves (166′, 166″) comprised in the end faces of said first end of the house body (132) and said second end of the house body (134), respectively.
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A method for creating a two-component rotary valve (100) comprising the steps of:
- injection moulding of one component followed by injection moulding of the other component either in the form of inner moulding or over moulding, whereby the first component takes part in shaping the second component;
- wherein the shrinkage of the components after moulding during the cooling of the materials is utilised to improve the seal of said rotary valve (100).
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Dependencies are inferred from the claim text.