53results about How to "Leak prevention" patented technology

A multilumen catheter assembly is provided, which includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes of generally circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape; or the finished tubes could include a combination of cross sectional shapes over its longitudinal length.

There is provided a tampon pledget that includes one or more enhanced features that result in the pledget exhibiting increased bypass leakage prevention. These enhanced features may include, but are not limited to, geometry, absorption, and any combinations thereof. There is also provided one or more methods for constructing a tampon pledget having increased bypass leakage protection.

A sound box structure includes a shell (10) and a speaker (30) received therein. The shell defines a resonance chamber (114) and a receiving chamber (115) communicating therewith. The speaker is received in the receiving chamber. The shell is Mg—Al alloy.

A bearing roller chain having a seal mechanism preventing entry of foreign substance from the outside, and leaking of lubricating oil leakage to the outside and the like, thereby improving wear resistance of the bearing roller and reducing both the likelihood of rotation failure and the traveling resistance of the chain. The seal mechanism is provided between an inner link plate of the chain and the hollow bearing roller, which has a plurality of internal anti-friction rollers rotatable between the hollow bearing roller and a bush mounted between opposed inner link plates. The seal mechanism encloses the internal anti-friction rollers and comprises two parts, i.e a seal ring having an annular lip portion, which comes into close contact with an outer side surface of the bearing roller and an annular metallic seal member. The metallic seal member forms a labyrinth structure by providing a flange on an outer circumferential portion which loosely enters an annular concave groove in the outer side surface of the bearing roller. The seal mechanism provides a double sealing effect by virtue of the seal ring and the annular metallic seal member.

A main pole has a top surface including a first portion and a second portion. The main pole has a bottom end including a third portion and a fourth portion. Each of the first and third portions has a first end located in a medium facing surface. The first portion is inclined relative to the medium facing surface and a first virtual plane that passes through the first end and is perpendicular to the medium facing surface and to the direction of travel of a recording medium. The third portion is inclined relative to the medium facing surface and a second virtual plane that passes through the first end and is perpendicular to the medium facing surface and to the direction of travel of the recording medium. The first portion is smaller than the third portion in length in a direction perpendicular to the medium facing surface.

A pressurized flush system includes a pressure water vessel having an inlet and an outlet. An infill valve, an open valve, and a flush valve are provided with the flush valve disposed within the pressure vessel and in fluid communication with the infill valve and the open valve. The flush valve includes a hollow valve body and cooperating pistons controlling water discharge from the water vessel outlet. The cooperating pistons are disposed within the hollow valve body.

Devices and methods for treating aneurysms, such as abdominal aortic aneurysms (“AAA”) generally include one or more stent-graft devices. Some embodiments include self-expanding and/or balloon-expandable stent components and one or more graft components coupled with the stent components. Using various combinations of self-expanding stent members, balloon-expandable stent members, graft members, and/or anchoring members enhances the anchoring abilities of a stent-graft device to prevent leakage around it, and may further allow the device to be adjusted after placement at a site for treatment. Some embodiments further include a skirt graft member for further prevention of leakage and/or device slippage.

The present invention relates to a method for controlling flowering time of a transgenic plant in a copper ion-inducible manner, wherein a heterologous gene which controls flowering time has been introduced to the plant.

A bearing roller chain which is sealed by a seal mechanism which prevents entry of foreign substances from the outside and leakage of lubricating oil leakage from the inside to the outside, resulting in an improvement in wear resistance of the bearing roller and avoidance both of rotation failure of the roller and of increased traveling resistance of the chain. A seal mechanism is provided between an inner link plate of a bearing roller chain and a bearing roller assembly carried by the link plate. The bearing roller assembly is formed by a plurality of anti-friction rollers between a hollow roller and a bush. The seal mechanism comprises an inner annular oil seal member, a spacer and a disk-shaped seal member having a flange extended toward an outer side surface of the hollow roller loosely into an outer circumferential concave groove on an end surface of the hollow roller. The disk-shaped seal member slidably comes into close contact with the inner link plate and the spacer, respectively. The flange and concave groove form a labyrinth structure protecting the inner annular seal member from entry of foreign substances from the outside. The annular seal has a plurality of lips supplementing the labyrinth seal structure.

The invention discloses a safety valve of a telescopic cylinder. The safety valve is arranged in a mounting port at the bottom of the telescopic cylinder and comprises a safety valve sleeve fixed in the mounting port; the safety valve sleeve is provided with a sealed inner cavity; an air inlet which is used for communicating the inner cavity of the safety valve sleeve with the inner cavity of the telescopic cylinder is arranged at the front end of the safety valve sleeve; an air outlet which is used for communicating the inner cavity of the safety valve sleeve with the external environment is arranged at the sidewall or the back part of the safety valve sleeve; an air plug is arranged in the inner cavity of the safety valve sleeve in a sliding fit manner; an elastic piece which is used for making the head part of the air plug support, press and block the air inlet is arranged at the back part of the air plug; and an elasticity adjusting device which is used for adjusting the elasticity of the elastic piece is arranged behind the elastic piece. Aiming at the disadvantage that the cylinder is excessively inflated to lead to cylinder damage as inflation amount for the cylinder cannot be controlled, the invention provides the safety valve of the telescopic cylinder safety valve, and the safety valve can be used for automatically releasing gas when the gas pressure in the cylinder exceeds a certain pressure and protecting the cylinder from high-pressure damage, and has the advantages of reliable action, adjustable pressure, simple structure and good safety.

The invention discloses a roadbed protective system in a debris flow gully and an implementation method for the roadbed protective system, and the roadbed protective system is arranged along the debris flow gully (7). The roadbed protective system comprises a blocking dam (2), a stop and deposit field (3), a drainage guide culvert (4) and an energy dissipation slot (5), wherein the blocking dam (2) is positioned in an upstream channel of the debris flow gully (7); the stop and deposit field (3) is positioned between the blocking dam (2) and a roadbed filling body (1) arranged at the downstream; an inlet of the drainage guide culvert (4) is mutually jointed with the stop and deposit field (3); the drainage guide culvert (4) transversely penetrates through the roadbed filling body (1); and a downstream slope surface at the outlet of the drainage guide culvert (4) is jointed with the energy dissipation slot (5). The roadbed protective system overcomes the defects that a drainage guide structure in the prior art is easily damaged and finally causes the roadbed to be destroyed by rush of water, and has the advantages of reducing scouring, on the both sides of the channel, of debris flow, and prevents most of rock blocks from discharging.

A filter cup is revealed. The filter cup includes an outer cup, an inner cup mounted in the outer cup and a grip. The inner cup consists of a filter bottom surface on the bottom thereof, a plug-like member on the filter bottom surface, and at least two flanges on top of the inner cup. A discharge hole is disposed on bottom of the outer cup and sealed by the plug-like member. Two rotating members are pivotally connected to the outer cup and each includes a leaning portion projecting therefrom. The grip is connected to the rotating members. The rotating members are driven to move for pushing the flanges and moving the inner cup vertically by the leaning portions thereof when the grip is pulled. Thus a gap is formed between the plug-like member and the discharge hole, allowing liquid in the inner to flow out therethrough.

The present invention provides a reverse osmosis filtration system without pressure tanks consisting of a filter element connecting member and external filter elements and having a raw water inlet, a pure water outlet and a wastewater outlet. In the reverse osmosis filtration system of the present invention, filter elements can be quickly and easily installed for avoiding leakage occurs during the installation or replacement of the filter elements, so that users can conveniently install or replace the filter elements by themselves and purposes of convenient operation and leakage prevention can be achieved. Meanwhile, water storage pressure tanks and pumps are omitted in the reverse osmosis filtration system of the present invention for reducing manufacturing costs and effectively avoiding secondary pollution.

A bottle for a heat exchanger extending in a longitudinal direction, including a tubular main body comprising a first opening, a plug having a plug body inserted at least partially into the tubular body to close the first opening, a retaining element adapted to retain the plug with respect to the tubular main body after insertion of the retaining element into the tubular main body, wherein the plug comprises a guiding means adapted to guide the retaining element during insertion of the retaining element and the retaining element is configured to be locked in the tubular body, the retaining element and the plug cooperating together to retain the plug in the tubular main body along the longitudinal axis.

A metal laminate gasket includes a first plate, intermediate plate and a second plate laminated together. The first plate has a curved portion for defining a hole to be sealed, and a flange extending outwardly from the curved portion. The intermediate plate is situated above the first plate laterally outside the flange. The second plate is situated above the intermediate plate and has a first bead disposed inside the intermediate plate and under the flange, and a second bead disposed outside the first bead and adjacent the flange. The second bead projects upwardly beyond the flange and has an inner section immediately outside the flange and an outer section outside the inner section. The inner section is inclined greater than the outer section.

The invention relates to a valve, in particular to an anti-leakage self-sealing valve which comprises a valve support, a rotary gear, a lower connecting plate, an upper connecting plate, a pinion, an upper closing plate, a lower closing plate and a conical connecting cylinder, a connecting support, a connecting cylinder, a clamping mechanism, a disassembling mechanism, a connecting rod and a one-way mechanism.

The invention relates to a cooling structure and a manufacturing method thereof, wherein the cooling structure comprises a substrate. The substrate includes a body and at least one pipe body, wherein the pipe body comprises an inlet end, an outlet end, and a pipe body portion. The pipe body portion is correspondingly arranged in the body, while the outlet end and the inlet end projectingly extend out of the body. A waterway is formed by injecting a body package of the pipe body into the internal part of the substrate, which not only reduces the cost, but also prevents the occurrence of waterway leakage.

A method and apparatus for the stabilization and safe removal of buried waste that is tested and classified as being transuranic or not transuranic waste and disposed accordingly. The buried waste (usually in vertical pipe units) is enclosed in a casing and ground and mixed with the surrounding soil. This process allows for chemical reactions to occur that stabilizes the mixture. The entire process is contained within the casing to avoid contamination. In situ or external testing is done for radio isotopes to classify the waste. If it is classified as transuranic the waste is removed in a controlled way into a retrieval enclosure and disposed off in drums. If the waste is not transuranic then grout is introduced into the mixture, allowed to set and the resulting monolith is removed and buried in trenches.

The invention discloses a method for protecting bank account fund security and multiple specific applications thereof, and belongs to the field of financial security. The method comprises the following steps of: dividing accounts into multiple levels with different functions; setting a few fund transfer and monitoring passwords, transferring funds among the levels by using a fixed phone number of bound numbers, a monitoring phone and a mobile phone, setting multiple persons to monitor the output funds, and authorizing departments of public security and the like of the output fund receiver accounts to monitor the funds, thus ensuring reality, legality and traceability of account possessors. When the mobile phone is used, information such as original passwords, accounts and the like does not need to be used or sent, so that radio signals can be prevented from being divulged by intercepting; the password can be used and monitored under the concealed condition, and the deposited amount is used as the other password, so that the theft-proof purpose is fulfilled, and the theft behaviors of thieves such as secret photography, hobbyhorses, exchange and the like completely lose effect; and by the method, a large amount of financial fraud, depositor hijacking, bribery, absconding with money, tax evasion and malicious overdraft cases can be reduced.

A capping unit is detachably mountable to an ink jet recording head. The ink jet recording head has an ejection outlet surface provided with ejection outlets for ejecting ink. The capping unit includes: a liquid-absorbing member provided with a projection contactable to a periphery of an area, in which the ejection outlets are formed, on the ejection outlet surface so as to form a gap between the area and the liquid-absorbing chamber; and a capping member including an engaging portion and an elastic portion for contacting a rear surface opposite from a surface on which the projection of said liquid-absorbing member is formed to press said liquid-absorbing member against the ejection outlet surface.

There is provided a developing device capable of preventing a carrier from abrading a shaft section of an agitating conveyance member facing a sealing member and preventing toner leakage resulting from the abrasion. A sealing member 21 is for sealing a clearance between a housing 13 and a shaft section 141 of an agitating conveyance member 14. A magnet 22 forms a magnetic shield in a radial direction orthogonal to the shaft section 141 of the agitating conveyance member 14. The magnet 22 is placed on the inner side of the sealing member 21 inside the housing 13.