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AB Durgo Patents |
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Assignee: AB Durgo
Address: Solna, SE
No. of patents: 3
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5983929 |
Air valve |
November 16, 1999 |
| An air valve that comprises a concave, downwardly facing cover (4) which is carried by a pipe connector (1) connected generally coaxially thereto, wherein the upper edge-part of the pipe connector (1) is surrounded by the wall of the cover (4), a ring-shaped, upwardly facing first seat r |
| 5881759 |
Air-ventilating valve |
March 16, 1999 |
| An air-ventilating valve is adapted to allow the ambient atmosphere to enter a conduit when the ambient pressure exceeds the pressure of gas in the conduit by a essentially predetermined amount, and which also blocks the release of gas from the conduit to the ambient atmosphere. The valv |
| 5803112 |
Reflux valve means |
September 8, 1998 |
| A reflux valve means for a fluid conduit (30) having a fluid outflow end, wherein the valve means includes a vacuum valve (10) intended for connection to a conduit branch (18) preferably to a top part or rising gradient of the conduit upstream of its outlet end. The valve (10) includ |
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