Abstract: A sealing device for an oil tank is mounted between a tank body and a floating roof and includes a fixed bracket, an inner layer plate secured to the fixed bracket, at least one inner spring plate secured on an annular inner diameter of the inner layer plate and applying a force directed toward an outer diameter of the inner layer plate, an outer layer plate arranged on an exterior face of the inner layer plate, with a gap being defined between an interior face of the outer layer plate and the exterior face of the inner layer plate, and at least one outer spring plate arranged in the gap between the outer layer plate and the inner layer plate and applying a force directed toward an outer diameter of the outer layer plate.

Abstract: A floating roof for an oil tank includes a beam unit and a plurality of float units secured on the beam unit. The beam unit includes a plurality of longitudinal beams and a plurality of transverse beams. Each of the longitudinal beams has an upright wall provided with a plurality of first transverse holes. Each of the transverse beams is located between two of the longitudinal beams and has a bottom plate and two transverse side plates. Each of the two transverse side plates has a second transverse hole. The beam unit further includes a plurality of bolts each extending through one of the first transverse holes and the second transverse hole of each of the transverse side plates, and a plurality of nuts screwed onto the bolts, so that the longitudinal beams and the transverse beams are combined together.

Abstract: An automatic aeration device includes a first floating roof, a second floating roof and a movable valve. The first floating roof has a through hole and a first enclosure. The second floating roof is disposed in the through hole and has a second enclosure. The movable valve is disposed above the first floating roof and the second floating roof and has a plate which has an outer wall and an inner wall. The outer wall is mounted in the first enclosure and has a plurality of first vent holes. The inner wall is mounted in the second enclosure and has a plurality of second vent holes. The automatic aeration device further includes a plurality of balls mounted between the first enclosure and the outer wall, and mounted between the second enclosure and the inner wall.

Abstract: An automatic aeration device includes a first floating roof, a second floating roof and a movable valve. The first floating roof has a through hole and a first enclosure. The second floating roof is disposed in the through hole and has a second enclosure. The movable valve is disposed above the first floating roof and the second floating roof and has a plate which has an outer wall and an inner wall. The outer wall is mounted in the first enclosure and has a plurality of first vent holes. The inner wall is mounted in the second enclosure and has a plurality of second vent holes. The automatic aeration device further includes a plurality of balls mounted between the first enclosure and the outer wall, and mounted between the second enclosure and the inner wall.

Abstract: A gasoline storage device, which is regulated to prevent gasoline from vaporizing, and is fabricated from a soft gasoline bag made from soft material that has been processed and coated on both sides so as to be resistant against gasoline and the majority of chemical liquids. The soft gasoline bag can be folded into a small size, directly disposed into a steel gasoline tank and allowed to unfold. Expandable hoses are used to respectively connect to the existing gasoline inlet pipe, gasoline-measuring pipe and manhole of the steel gasoline tank. The soft properties of the soft gasoline bag are used to isolate the gasoline stored within the steel gasoline tank from the air, thereby reducing vaporization of gasoline, pollution and wastage.

Abstract: A fastening assembly includes a fastening screw and a fastening assembly. The fastening screw includes a head section having multiple first tooth elements at a lower surface thereof, and a screw fastening section at a lower portion thereof for fastening into a work piece. The fastening accessory includes multiple second and third tooth elements at upper and lower surfaces thereof, respectively, multiple grooves formed between the second tooth elements, and an embedding recess at an upper portion thereof. The fastening accessory is accommodated at a lower portion of the fastening screw to lodge the first tooth elements into the embedding recess, such that the fastening accessory is closely fastened to the lower portion of the fastening screw. The third tooth elements are engaged to a surface of the work piece to allow both of the fastening screw and the fastening accessory to become closely fastened to the work piece.

Abstract: A mist spraying device includes a base having a control circuit and a battery, a water tank having an atomizing plate and a water level sensor, and an upper lid. The top of the base includes metal junctions connected with a power end and a sensor end of the control circuit. The water tank is connected to an upper end of the base, and a bottom of the water tank includes conductor junctions, enabling the control circuit to control the atomizing plate to atomize by oscillation water or liquid in the water tank into water steam or gasified liquid to be sprayed out. The upper lid is assembled with the base, covers the water tank, and includes a spraying hole to spray out water steam or gasified liquid formed by atomizing water or liquid in the water tank by the atomizing plate.

Abstract: An oil tank floating roof device, includes a plurality of connecting bars and a plurality of floating units, which are respectively secured to the plurality of connecting bars by means a plurality of longitudinal and crosswise holding spaces collectively encircling the floating units. A plurality of locking members are fitted on the peripheries of the floating units, and two sides of the connecting bars respectively form at least one joining groove. The joining grooves respectively enable each of the floating units to longitudinally or crosswisely insert therein. The top portions of the connecting bars form at least one pressure resistant reinforcing plate, and the pressure resistant reinforcing plate is fitted with a plurality of locking portions. Bolts are used to respectively correspondingly pass through the locking portions and bolt into the locking members on the longitudinal or crosswise sides of the base of the floating units.

Abstract: The present invention is an oil tank floating roof device, including a plurality of connecting bars and a plurality of floating units, which are respectively secured to the plurality of connecting bars by means a plurality of longitudinal and crosswise holding spaces collectively encircling the floating units. A plurality of locking members are fitted on the peripheries of the floating units, and two sides of the connecting bars respectively form at least one joining groove. The joining grooves respectively enable each of the floating units to longitudinally or crosswisely insert therein. The top portions of the connecting bars form at least one pressure resistant reinforcing plate, and the pressure resistant reinforcing plate is fitted with a plurality of locking portions. Bolts are used to respectively correspondingly pass through the locking portions and bolt into the locking members on the longitudinal or crosswise sides of the base of the floating units.

Abstract: The present invention provides an Intelligent Engineering Data Analysis (I-EDA) system and method to help prevent low wafer yield and prevent occurrences of abnormal events. The I-EDA has a non-conforming wafer tracing (NCWT) system that operates to correlate occurrences of abnormal events with low wafer yield. The method generally has the steps of performing a fabrication operation on wafers disposed within a wafer lot; determining if an abnormal event occurred while performing the fabrication operation on the wafers disposed within the wafer lot; using a NCWT to determine a statistical correlation between an occurrence of an abnormal event and a wafer yield of the wafers being processed during the occurrence of the abnormal event if the abnormal event occurred during processing of the wafers disposed within the wafer lot; and using the determined statistical correlation to analyze the fabrication process and thereby improve wafer yield.

Abstract: The present invention provides an Intelligent Engineering Data Analysis (I-EDA) system and method to help prevent low wafer yield and prevent occurrences of abnormal events. The I-EDA has a non-conforming wafer tracing (NCWT) system that operates to correlate occurrences of abnormal events with low wafer yield. The method generally has the steps of performing a fabrication operation on wafers disposed within a wafer lot; determining if an abnormal event occurred while performing the fabrication operation on the wafers disposed within the wafer lot; using a NCWT to determine a statistical correlation between an occurrence of an abnormal event and a wafer yield of the wafers being processed during the occurrence of the abnormal event if the abnormal event occurred during processing of the wafers disposed within the wafer lot; and using the determined statistical correlation to analyze the fabrication process and thereby improve wafer yield.