329results about How to "Keep tight" patented technology

A spiral membrane element having an enlarged effective membrane surface area without having its separation performance lowered, while maintaining the sealing property of any sealing portion of a cylindrically wound body, and a manufacturing method of the same are disclosed. The spiral membrane element includes a cylindrically wound body comprising a perforated central tube and, spirally wound therearound, a separation membrane, a feed-side passage material and a permeation-side passage material in a laminated state, and a sealing portion for preventing a feed-side fluid and a permeation-side fluid from being mixed together, wherein the sealing portion formed at each of both ends of the cylindrically wound body is spirally formed with a substantially constant width by an adhesive and has a trimmed section formed on its whole end surface, and the cylindrically wound body has a ratio of its length to the length of the central tube of 0.96 to 1.00, and a ratio of an ineffective membrane surface area to the entire membrane surface area of 0.02 to 0.10.

A cover and a system of covers/boots for placement in sealed relation over a connector or pair of connectors that is or are adapted to terminate a cable or splice together a pair of cables, preferably cables that carry signals received by a receiving apparatus on a cell tower. The covers include a cable end that sealingly receives a cable therein, an elongated body that provides secure cover to a cable connector, and an end that abuts a bulkhead or sealingly engages with a second cover when used in a splicing application.

In a device for sealing a bore hole and discharging drill cuttings and stripped excavation material, including a housing adapted to receive sealing elements and an opening capable of being connected to the bore hole, one side wall of the housing is provided with at least one opening for the connection of a haulage duct, wherein the housing end side facing the bore hole is equipped with a lockable, particularly screwable, sealing flange (13) for the detachable connection with a bore hole lining (11). The sealing flange (13) is rotationally and sealingly mounted within the housing and carries projections, in particular an annular brim (15) which is overlapped by a stop (14) of the housing.

The present invention relates to a downhole annular barrier (1) with an axial extension having an outer surface facing an inner surface of an outer structure (2). The downhole annular barrier comprises a tubular part (5), an expandable part (3), and at least one annular sealing element (41). The annular sealing element (41) is connected with the expandable part (3) and has an axial length along the axial extension of the downhole annular barrier which is less than 50% of a length of the downhole annular barrier along the axial extension of the downhole annular barrier. The annular sealing element comprises a spring element (43). Also, the present invention relates to a downhole system and to a seal providing method.

The invention belongs to the field of laboratory instrument equipment, and discloses a device for collecting greenhouse gases released by lake and reservoir water bodies and an analysis method of release rate. The device comprises an overwater gas collecting system and a gas sample collecting system, wherein the overwater gas collecting system is composed of a PVC (Polyvinyl Chloride) and a buoy; the PVC barrel is inverted in the buoy, and the barrel port of the PVC barrel is coincided with the lower edge of the buoy; the gas collecting system comprises a gas collecting pipe, a tee valve, a gas sucking plastic needle cylinder and an aluminum foil vacuum bag; one end of the gas collecting pipe is communicated with the top of the PVC barrel; and the other end of the gas collecting pipe, the gas sucking plastic needle cylinder and the aluminum foil vacuum bag are respectively communicated with a valve I, a valve II and a valve III of the tee valve. By adopting the device disclosed by the invention, the problem that the greenhouse gases in the lake and reservoir are difficultly collected is solved; and the device is simple and convenient in structure, easy to operate and is high in experiment precision.

To reduce the size/weight and the power consumption of a fan-coupling device and to provide an external control type fan-coupling device intended to improve a fan rotation controllability.

A fan-coupling device, in which the inside of a sealed housing borne on a rotary shaft fixing a drive disk thereon is divided by a partition into an oil sump and a torque transmission chamber housing the drive disc, so that the drive torque may be transmitted to a driven side with the oil fed into the torque transmission chamber and so that the communication passage of oil may be opened/closed and controlled by a valve member to be activated by an electromagnet. In the fan-coupling device, a magnetic member of either an integral structure or a split structure composed of a plurality of parts and assembled integrally is arranged between the electromagnet and the valve member (or armature), and the magnetic member is so assembled in the sealed housing that the magnetic flux of the electromagnet may be transmitted through the magnetic member to the armature.

Disclosed herein is a plate-shaped secondary battery constructed in a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case, and the battery case is sealed by thermal welding, wherein the secondary battery has at least one-way exhaust member, mounted at a sealed portion, formed at the outer circumference of an electrode assembly receiving part of the battery case, for allowing internal high-pressure gas to be exhausted out of a battery cell and preventing external gas from being introduced into the battery cell. The secondary battery according to the present invention has the effect of effectively exhausting internal high-pressure gas generated during the abnormal operation of the battery, such as overcharge, out of the battery case, while maintaining the sealability of the battery case, thereby simultaneously improving the efficiency and safety of the battery.

An air conditioning apparatus has a case and a rotatable member that is rotatably supported by the case. The rotatable member and the case define a closed space between opposed surfaces thereof. The closed space is filled with a high-viscosity fluid having a predetermined coefficient of viscosity so as to generate a predetermined resistance to move of the rotatable member. The rotatable member is, for example, a door and a member of a link mechanism that operates the door, such as a lever plate, a link plate or the like.

A battery pack for supplying power to an electrical device has a plastic housing having a housing wall with at least one wall section, at least one battery cell which has an outer circumference and is inserted into the housing so that the at least one wall section of the housing wall faces said outer circumference surface of the battery cell, the wall section of the housing and the circumference surface of the at least one battery cell being complementarily shaped along at least one quarter of a circumference of the at least one battery cell and resting against each other in a form-locked manner.

A mechanical seal has a structure wherein a plurality of sealed-fluid-accommodating blocks separated in the circumferential direction are formed on either the sealing face of a fixed ring or the sealing face of a rotating ring so as to communicate with a sealed fluid accommodation space. Pumping parts for creating a pumping action due to the fixed ring and the rotating ring sliding while undergoing relative rotation are formed on a bottom part of the plurality of sealed-fluid-accommodating blocks. The pumping parts formed on the bottom parts of the plurality of sealed-fluid-accommodating blocks are provided with an intake pumping part which acts in a direction in which the sealed fluid is drawn in and a discharge pumping part which acts in a direction in which the sealed fluid is discharged.

An energy storage device and a method of manufacturing the same are disclosed. The energy storage device includes a circuit board, a conductive cover disposed above the circuit board, a sealing structure, a metal coating layer, and an electrochemical cell. The sealing structure is disposed between the circuit board and the circumference of the conductive cover such that the circuit board, the conductive cover, and the sealing structure together form a sealed space where the electrochemical cell is disposed. The metal coating layer continuously covers a part of the conductive cover, an exposed portion of the sealing structure, and a part of the circuit board. Therefore, even if the energy storage device needs to be heated during a product assembly, the metal coating layer can keep the sealing structure structurally stable, and the electrolyte of the electrochemical cell will not leak; the whole energy storage device therefore can keeps undamaged.

A ball screw with sectional circulating assemblies comprises an inner circulating block and an outer circulating block. In assembly, the inner circulating block is initially placed between the screw shaft and the nut before the rolling balls and the screw shaft are positioned, thus preventing the rolling balls from dropping out and the interference with the threads of the screw shaft. After the rolling balls and the screw shaft are positioned, the outer circulating block is placed into the nut and engaged with the inner circulating block, and the outer circulating block is fixed to the nut. This method can maintain the tightness of the nut, thus preventing the leakage of noise.

The invention relates to building reinforcing construction equipment comprising a bottom plate. A tensioning conveying device is mounted on the bottom plate; a gluing device is mounted on the rear side of the bottom plate and located above the tensioning conveying device; a cutting collecting device is mounted on the front side of the bottom plate; the tensioning conveying device comprises a winding roller, a first adjusting roller, a first limiting roller, a second limiting roller, a second adjusting roller and a coiling roller which are sequentially mounted on the bottom plate from front toback; and a carbon fiber cloth body is wound around the coiling roller. The building reinforcing construction equipment can solve the problems that in the existing process of manual treatment of a carbon fiber cloth, the carbon fiber cloth needs to be manually cut according to the processing size, the carbon fiber cloth needs to be manually coated with glue, the glued carbon fiber cloth needs to be manually stacked, manual gluing is not uniform, the house reinforcing effect is affected, carbon fiber cloth manual stacking is complex in operation, the space required for stacking is large, and the space utilization rate is low.