Non-return valve
AssigneeSulzer Brothers Limited
InventorEdelbert Tiefenthaler
Life of this patent
Estimating the term…
Abstract
The non-return valve comprises a housing provided with an inlet connection, a coaxial installation opening, and an outlet connection. An insert is secured in the installation opening to define a chamber with a cover on the valve. A movable valve body means includes a piston which divides the insert chamber into two cylindrical chambers while connecting ducts lead from the respective cylinder chambers to the housing chamber on the outlet side. A damping member is provided on the movable valve body system in the form of an annular ring to penetrate into the duct leading from the lower cylinder chamber when the valve closes to bring about a throttling action. Shock-like closure of the valve is thus eliminated in a simple and operationally reliably manner.
Claims11
A non-return valve comprising
- a housing defining a chamber and including an inlet connection to said chamber, an installation opening opposite said inlet connection and an outlet connection from said housing chamber;
- an insert fixedly mounted within said installation opening to define a second chamber coaxial to said inlet connection;
- a movable valve body means including a displaceable piston dividing said second chamber into two coaxial cylinder chambers, a valve spindle secured to said piston and passing through a bore of said insert and a valve disc secured to said spindle for selectively sealing said inlet connection in response to movement of said means from a valve-open position to a valve-closed position;
- a first connecting duct communicating said cylinder chamber between said piston and said installation opening with said housing chamber;
- a second connecting duct communicating said cylinder chamber between said piston and said inlet connection with said housing chamber;
- and
- a damping member secured to said movable valve body means for penetrating into said second duct to throttle flow therethrough upon movement of said means into said valve-closed position.
A non-return valve comprising
- a housing defining a chamber and including an inlet connection to said chamber, and an outlet connection from said housing chamber;
- an insert fixedly mounted within said housing to define a second chamber coaxial to said inlet connection;
- a movable valve body means including a displaceable piston dividing said second chamber into two coaxial cylinder chambers, a valve spindle secured to said piston and passing through said insert in slidable relation and a valve disc secured to said spindle for selectively sealing said inlet connection in response to movement of said means from a valve-open position to a valve-closed position;
- a first connecting duct communicating said cylinder chamber between said piston and said installation opening with said housing chamber;
- a second connecting duct communicating said cylinder chamber between said piston and said inlet connection with said housing chamber;
- and
- a damping member secured to said movable valve body means for penetrating into said second duct to throttle flow therethorugh upon movement of said means into said valve closed position.
Dependencies are inferred from the claim text.