WO2005061934A1 - Check valve - Google Patents

Abstract

This invention is related to the “Check Valve with Rubber Membrane and Cylindrical Concave Surface”. It is a check valve system with support plates (3) that is located on two opposite channels inside the inner surface of the body (1) and is based on the principle of fixing the circular-shaped membrane (2) upon the cylindrical concave surface (4) over a channel in such a way that it will allow the flow in one direction while preventing the flow in the reverse direction

Description

DESCRIPTION CHECK VALVE This invention is related to the "Check Valve with Rubber Membrane and Cylindrical

Concave Surface". It is a check valve system with support plates and centering channels and is based on the principle of fixing the circular-shaped membrane upon the cylindrical concave surface over a channel in such a way that it will allow the flow in one direction while preventing the flow in the reverse direction. Check valves are divided into three groups according to their systems of operation. Ball check valves are based on the principle of a ball moving inside a cylindrical body. Check valves with cylindrical valve action are based on the principle of a valve moving inside a cylindrical body. Check valves with back-flap hinges are based on the principle of a hinged cap with one side in the cylindrical body rotating around the hinge. There are also check valves operating with a rubber pipe placed inside another cylinder with holes located inside the cylinder. Moreover, there are also types of check valves at which a supportive spherical piece is attached to the middle of the circular rubber membrane from below through an element such as a bolt or a screw. In our invention, the circular shaped rubber membrane is buckled with the middle support plate in a concave shape. This buckling enables the rubber membrane to be in constant contact with the concave cylindrical shaped bottom that it is placed. The form of the bottom surface has a cylindrical concave shape just like the rubber membrane. There is a channel on this cylindrical concave surface. The membrane is placed on this channel through the help of the ridge that is compatible with the lines of the channel. The support plate, of which one side has the same cylindrical structure, pushes the membrane onto the cylindrical concave surface as fitted into the two opposite channels taking place on the inner surface of the body. These opposite channels on the inner surface of the body fix the support plate. The ball valves, which are of equivalent characteristics, are heavier by design because of their structures. They run noisily and have short lives as they create strong impacts when they are closing. The check valves in the second group mentioned above (check valves with valve action) are also noisy and have short lives since they also create strong impacts when they are closing. The spring used may be affected by the chemicals. Furthermore, the spring may wear down the groove in which the spring moves. The check valves with backflap hinges also operate with impact and noise due to their weights. The fluid flowing holes are narrow by design. There is also another problem created by the deformation of the hinges used by the time. The rubber is deformed quickly in the check valves at which a supportive ball piece is attached to the middle of the circular rubber membrane from below with an element such as a bolt or a screw. There is not a supportive unit enabling the rubber to be placed on the flat surface, and the connecting elements can be deformed in the course of time as a disadvantage. The rubber can lose its elasticity in the case of its equivalents of the check valves incorporating a second cylinder with holes placed inside the cylinder. Furthermore, the size of the passage surface is narrower as it depends on the expansion in the rubber size. Our invention, on the other hand, is noiseless and impact-free having consequently a longer life since it operates on the basis of supportive plate membrane located on a cylindrical concave surface. It has a wider fluid passage surface. There is almost no probability of malfunctions as a result of having a simple structure and not having elements touching anywhere. It is very easy to assemble and manufacture our check valves. Picture 1 shows its implicit and general outline; Picture 2 shows its explicit and general outline; Picture 3 shows its explicit cross-sectional outline, Picture 4 shows its implicit outline with collar application and Picture 5 shows its explicit outline with collar applicationwith regard to our invention; and the parts are designated with numbers as follows: body (1), membrane rubber (2), support plate (3), cylindrical concave surface (4), membrane centering channel (5), support plate channels (6) and fluid channels (7). The membrane centering channel (5) is located on the cylindrical concave surface (4) which is in the middle of the body (1). The membrane rubber (2) which has a ridge underneath is placed on the centering channel (5). The support plates (3) which engages with the channels of the support plates (6) pushes the membrane rubber (2) towards the cylindrical concave inner surface (4) and membrane centering channel (5), and enables the membrane rubber (2) to have a complete contact with the cylindrical concave surface (4). The membrane rubber (2) enables the flow by buckling around the support plate (3) in the direction of the flow as a result of the pressure and flow effects of the liquids flowing through the liquid channels (7). When there is a flow in the opposite direction, membrane rubber (2) turns onto the cylindrical concave surface (4) assuming its first position, covers the cylindrical concave surface (4) and prevents the flow of fluids in that direction. Support plate (3) permits movements of the membrane rubber (2) only in the same direction with the flow and prevents the movements in the other directions since it is fixed by support plate channels. Our invention can be used at all places where fluid control is required, such as factories, houses, swimming pools, etc.

Claims

CLAIMS 1) Our invention is a check valve with "Cylindrical Concave Surface and Rubber Membrane", based on the principle of locating the rubber membrane onto the cylindrical concave surface with support channels and a membrane centering channel; and its unique feature is that it is consisting of a body (1), a membrane rubber (2) support plates (3), a cylindrical concave inner surface (4), a membrane centering channel (5), support plate channels (6) and liquid channels (7). 2) The invention in Claim 1 is a check valve with "Cylindrical Concave Surface and Rubber Membrane" and its property is the the existence of a cylindrical concave surface (4) placed in the middle of the body (1), with membrane centering channel (5) on top. 3) The invention in Claim 1 is a check valve with "Cylindrical Concave Surface and Rubber Membrane" and its property is the existence of a cylindrical shaped membrane rubber (2) which is fixed on the centering channel (5) with the help of the ridge (projection) underneath. 4) The invention in Claim 1 is a check valve with "Cylindrical Concave Surface and Rubber Membrane" and its property is the existence of a support plates (3) which engage with support plate channels (6) enabling membrane rubber (2) to have a complete contact with cylindrical concave surface (4) by pushing the membrane rubber (2) towards the cylindrical concave surface (4) and the membrane centering channel (5). 5) The invention in Claim 1 is a check valve with "Cylindrical Concave Surface and Rubber Membrane" and its property is to enable the flow of liquids by buckling the membrane rubber (2) around the support plates (3) in the same direction of the flow, due to pressure and flow effects of the liquids flowing through the liquid channels (7). 6) The invention in Claim 1 is a check valve with "Cylindrical Concave Surface and Rubber Membrane" and its property is the existence of a membrane rubber (2) which turns onto the cylindrical concave surface (4) assuming its first position, covers the cylindrical concave surface (4) and prevents the flow of fluids when there is flow in the opposite direction. 7) The invention in Claim 1 is a check valve with "Cylindrical Concave Surface and Rubber Membrane" and its property is the existence of the support plate (3) which is fixed by support plate channels and permits movements of the membrane rubber (2) in the same direction with the flow and prevents the movements in the other directions.