Flap valve
AssigneeGustav F. Gerdts KG
InventorGerhard Schutzer
Life of this patent
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Abstract
A flap valve is provided which includes a valve housing having a valve seat defined therein, on one side of which is a flow inlet chamber and on the other side of which is a flow discharge chamber, at least one locking element pivotably mounted in the valve housing for movement between an open and closed position relative to the valve seat, and at least one locking spring mounted in the flow inlet chamber of the housing having one portion which is rigidly held in the valve housing and a pivotable lever arm which engages the locking element to urge the locking member into the closed position. The lever arm of the spring and the locking member are slideably coupled together so that the force required to open the locking member increases only slightly or preferably decreases during the opening pivotable movement of the locking member.
Claims7
A flap valve comprising:
- a valve housing having a valve seat defined therein, on one side of which is a flow inlet chamber and on the other side of which is a flow discharge chamber;
- at least one locking member pivotably mounted in said valve housing for movement between an open and closed position relative to said valve seat;
- at least one locking spring mounted in the flow inlet chamber of said housing, said spring including one portion which is rigidly held in said valve housing and a pivotable lever arm which engages said locking member to urge such locking member into a closed position;
- and
- means for coupling said arm of said locking spring to said locking member in a manner allowing pulling action of said arm onto said locking member in the pivot direction of said locking member and for also allowing sliding movement of said arm and said locking member in the longitudinal direction of said lever arm relative to one another.
Dependencies are inferred from the claim text.