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1. 发明专利

ES2176999T3 未知
公开(公告)号：ES2176999T3
公开(公告)日：2002-12-01
申请号：ES98916679
申请日：1998-04-01
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/40 , B65D90/34
摘要： The present invention relates to a device which is used in the floating roofs of tanks for storing liquids and is intended to prevent the formation of a vacuum between the stored liquid and the floating roof (5). More particularly, the device of the invention is intended for a liquid storage tank which has operating heights which are much lower than the maintenance height.There are two possible ways in which the device of the invention can operate. When the floating roof (5) is in operating mode and reaches its minimum operating height (FIG. 2), a lower shaft stop (10) of a sliding shaft of the valve comes against a lower stop (8) of the body (2) of the device, causing the device (30) to open.When the floating roof (5) is placed in the maintenance mode, use is made of a locking pin (4) for rigidly fastening the sliding shaft (3) to the body (2) of the device (30), which enables the assembly to open when the floating roof reaches the maintenance height (FIG. 4).

2. 发明专利

ES2173612T3 未知
公开(公告)号：ES2173612T3
公开(公告)日：2002-10-16
申请号：ES98942411
申请日：1998-09-08
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/08 , E04H7/06
摘要： A method for inverting the convex configuration of a liquid-product storage-tank bottom is described for providing greater efficiency in the removal of undesirable materials that normally accumulate on the tank bottom. A layer of material having plastic properties is placed over the conventional tank bottom except for at least one section from the center of the tank base to the edge. The material with plastic properties hardens over time, thus producing a new bottom having a center at a level below the level of the edge. The part over which the material having plastic properties was not placed forms a flow gutter which leads the liquids and sediments which have to be drained off to the edge.

3. 发明专利

NO994849L 未知
公开(公告)号：NO994849L
公开(公告)日：1999-10-05
申请号：NO994849
申请日：1999-10-05
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/40 , B65D90/34 , B65D88/34
摘要： The present invention relates to a device which is used in the floating roofs of tanks for storing liquids and is intended to prevent the formation of a vacuum between the stored liquid and the floating roof (5). More particularly, the device of the invention is intended for a liquid storage tank which has operating heights which are much lower than the maintenance height.There are two possible ways in which the device of the invention can operate. When the floating roof (5) is in operating mode and reaches its minimum operating height (FIG. 2), a lower shaft stop (10) of a sliding shaft of the valve comes against a lower stop (8) of the body (2) of the device, causing the device (30) to open.When the floating roof (5) is placed in the maintenance mode, use is made of a locking pin (4) for rigidly fastening the sliding shaft (3) to the body (2) of the device (30), which enables the assembly to open when the floating roof reaches the maintenance height (FIG. 4).

4. 发明专利

CA2306774A1 METHOD FOR INVERTING THE CONVEX CONFIGURATION OF A LIQUID-PRODUCT STORAGE-TANK BOTTOM 未知
公开(公告)号：CA2306774A1
公开(公告)日：1999-04-29
申请号：CA2306774
申请日：1998-09-08
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/08 , E04H7/06
摘要： This invention relates to a method for inverting the convex configuration of a liquid-product storage-tank bottom with a view to providing greater efficiency in the operations of removing the undesirable materials which normally accumulate in the tank bottom (5). A layer of material having, plastic properties, is placed over the conventional tank bottom (7), except for one part from the centre of the tank base to the edges. The material with plastic properties hardens over time, thus producing a new bottom (7) whose centre (11) is at a level below the level of the edges. The part over which material having plastic properties was not placed forms a flow gutter (9) which leads the liquids and sediments which have to be drained off to the edges.

5. 发明专利

NO314493B1 未知
公开(公告)号：NO314493B1
公开(公告)日：2003-03-31
申请号：NO994079
申请日：1999-08-24
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/34
摘要： An assembly for supporting the floating roof of a tank is provided that includes a guide fastened to the floating roof, a support leg slidably received in the guide and a locking pin. The guide supports the floating roof when the assembly is in an operating mode. In this mode, the support leg may be withdrawn from the guide. When the support leg is withdrawn, the locking pin is installed coaxial with the vertical axis of the guide, to close the orifice remaining upon removal of the support leg. When the roof is placed in a maintenance mode, the support leg is reinserted in the orifice and the locking pin is passed through aligned orifices of plates rigidly fastened to the top end of the guide. The transverse orientation of the locking pin in the locked mode enables an operator to determine the operating status of the floating roof.

6. 发明专利

PT975535E 未知
公开(公告)号：PT975535E
公开(公告)日：2002-10-31
申请号：PT98916679
申请日：1998-04-01
申请人： PETROLEO BRASILEIRO SA
发明人： PRADEL LUIS ADOLFO VELLOSO , WITTER ALDYR
IPC分类号： B65D88/40 , B65D90/34
摘要： The present invention relates to a device which is used in the floating roofs of tanks for storing liquids and is intended to prevent the formation of a vacuum between the stored liquid and the floating roof (5). More particularly, the device of the invention is intended for a liquid storage tank which has operating heights which are much lower than the maintenance height.There are two possible ways in which the device of the invention can operate. When the floating roof (5) is in operating mode and reaches its minimum operating height (FIG. 2), a lower shaft stop (10) of a sliding shaft of the valve comes against a lower stop (8) of the body (2) of the device, causing the device (30) to open.When the floating roof (5) is placed in the maintenance mode, use is made of a locking pin (4) for rigidly fastening the sliding shaft (3) to the body (2) of the device (30), which enables the assembly to open when the floating roof reaches the maintenance height (FIG. 4).

7. 发明专利

PT1027269E 未知
公开(公告)号：PT1027269E
公开(公告)日：2002-09-30
申请号：PT98942411
申请日：1998-09-08
申请人： PETROLEO BRASILEIRO SA
发明人： PRADEL LUIS ADOLFO VELLOSO , WITTER ALDYR
IPC分类号： B65D88/08 , E04H7/06
摘要： A method for inverting the convex configuration of a liquid-product storage-tank bottom is described for providing greater efficiency in the removal of undesirable materials that normally accumulate on the tank bottom. A layer of material having plastic properties is placed over the conventional tank bottom except for at least one section from the center of the tank base to the edge. The material with plastic properties hardens over time, thus producing a new bottom having a center at a level below the level of the edge. The part over which the material having plastic properties was not placed forms a flow gutter which leads the liquids and sediments which have to be drained off to the edge.

8. 发明专利

NO20001843A 未知
公开(公告)号：NO20001843A
公开(公告)日：2000-06-13
申请号：NO20001843
申请日：2000-04-10
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/08 , E04H7/06
CPC分类号： E04H7/06

9. 发明专利

NO994849A 未知
公开(公告)号：NO994849A
公开(公告)日：1999-10-05
申请号：NO994849
申请日：1999-10-05
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： B65D88/40 , B65D90/34 , B65D88/34
CPC分类号： B65D90/34

10. 发明专利

ID19932A 未知
公开(公告)号：ID19932A
公开(公告)日：1998-08-27
申请号：ID980247
申请日：1998-02-23
申请人： PETROLEO BRASILEIRO SA
发明人： WITTER ALDYR , PRADEL LUIS ADOLFO VELLOSO
IPC分类号： F23R3/28

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