37results about How to "Improve liquid tightness" patented technology

A bypass duct portion is integrally provided in a casing of an EGR cooler so that heat distortion generated at a part of the casing when bypassing of an exhaust gas is rationally absorbed, and the EGR cooler body and a valve case are brazed / fixed all together so as to improve strength of the valve case, whereby, the bypass duct portion is formed between an inner surface of the casing and the core, a switch is provided for switching and guiding the exhaust gas to either of the core or the bypass duct portion, and a large number of outer ribs formed in the circumferential direction respectively are arranged side by side while being separated from each other in the longitudinal direction in the bypass duct portion of the casing so as to constitute a heat stress absorbing portion. And a cylindrical valve case is integrally formed by deep drawing of a thin metal plate by a press machine, a pair of slits are provided at the rear end of the valve case, both edges of an intra-valve partition plate are inserted into the slits, support projection portions are provided on both faces of the both edge portions of the intra-valve partition plate, and the edge of the slit is supported by the support projection portion. And an opening of the valve case is integrally brazed / fixed to an opening of a header portion of the casing.

A liquid-dispensing structure includes: an outer cylinder with a one-way valve at its lower end to allow a liquid to flow into the outer cylinder; a hollow piston being slidable inside the outer cylinder and having a pair of liquid-tight portions formed with circular convex portions around its outer circumferential surface in positions apart in an axial direction; and an inner cylinder for dispensing a liquid, which reciprocates inside the outer cylinder so that the piston moves in a piston-sliding area of the inner cylinder having an opening through which the liquid flows. The opening is closed when the piston is at a lower position and is opened when the piston is at an upper position.

A woven tubing for use in a stent type blood vascular prosthesis which contains a multifilament formed of two–five single filaments in at least part of warps and has the single filaments disposed in single lines, and a stent type blood vascular prosthesis using the woven tubing are described. The prosthesis combines a shape retaining property that is capable of maintaining its tubular shape without being crushed by the flow of blood with a high liquid tightness that is capable of reducing the leakage of blood to the exterior when implanted at the site of a lesion and allows prevention of the inflow of blood into the site of a lesion.

A chain tensioner includes a cylinder inserted in a tensioner mounting hole of an engine cover and having a flange fixed to the outer surface of the engine cover. A plunger is axially slidably mounted in the cylinder. The cylinder is formed with an oil supply passage through which hydraulic oil is introduced into a pressure chamber defined by the cylinder and the plunger. The oil supply passage includes a first hole portion extending inwardly from a mating surface of the flange facing the engine cover, and a second hole portion extending from the outer periphery of the flange to the pressure chamber and intersecting the first hole portion. An externally threaded portion of an externally threaded member is in threaded engagement with an internal thread formed on the second hole portion, thereby closing its outer open end. The externally threaded member is fixed in position with an adhesive applied to its externally threaded portion.

The present invention is a liquid applicator which, in its assembled state an applying part, joint, and front barrel are fixed to a barrel body front end portion, the step of an indented / projected engaging portion on the inner peripheral side of the applying part rear end portion is abutted from behind against and engaged with the step of an indented / projected engaging portion on the outer peripheral side of the forward part of the joint. At the same time, an indented / projected engaging portion on the outer peripheral side of the applying part rear end portion is abutted against and engaged with an indented / projected engaging portion on the inner peripheral side of the front barrel's forward part, and an indented / projected engaging portion on the inner peripheral side of the front barrel rearward part is engaged with an indented / projected engaging portion on the outer peripheral side in the rearward part of joint, whereby applying part, joint and front barrel are formed so as to fix the applying part to barrel body by means of the joint and the front barrel.

A non-rotary cutting tool which is to be moved relative to a workpiece in a predetermined direction for cutting the workpiece, with its rake face being held substantially perpendicular to the predetermined direction. The cutting tool includes (a) a generally cylindrical shank portion, and (b) a generally semi-cylindrical body portion which has an outer circumferential surface constituted by the rake face and a semi-cylindrical surface. The semi-cylindrical body portion has a cutting edge which is defined by an edge of the rake face and which is covered with a diamond coating. Also disclosed is a process of machining a scroll member of a scroll compressor by using this non-rotary cutting tool.

To provide a flexible double-layer tube excellent in flexibility though its structure is simple, high in joining strength between a tube body inner wall surface and a partition plate, and excellent in the airtightness and liquidtightness of both flow passages. In this double-layer tube, the double flow passages 19 and 20 are formed by partitioning the inside of a tube body 1 by the partition plate 7 by joining both end parts of the soft resin partition plate 7 along the longitudinal direction of the tube to the smooth inner wall surface 8 of the soft resin tube body 1 peripherally reinforced by reinforcement materials 3 and 4 with a hot-melt adhesive agent 15.

Provided is a slide fastener whereby waterproof properties near a bottom stop can be enhanced in cost-effective manner. A slide fastener (1) having a waterproof structure comprises a left-right pair of fastener stringers (2) each having a plurality of fastener elements (3) arranged in a row along an opposing edge (11) of each of a left-right pair of waterproof fastener tapes (10), a slider (7) for engaging and disengaging the left and right fastener elements (3) with each other, and a bottom stop (4) formed at the bottom end of the rows of fastener elements (3) so as to straddle the left and right fastener tapes (10). Each fastener element (3) includes an engaging head part (30), a base part (33), a neck part (32), and a shoulder part (34), and the bottom stop (4) covers a first fastener element (3a) near the lowermost end except for an upper portion of an engaging head part (30a) of the first fastener element, and covers a lower portion of a base part (33b) of a second fastener element (3b) that is above and adjacent to the first fastener element (3a). In the bottom stop (4), a recess (40) is provided that is downwardly indented at the top of the bottom stop. The upper portion of the engaging head part (30a) of the first fastener element (3a), and the lower portions of the neck part (32b) and the engaging head part (30b) of the second fastener element (3b) are disposed in the recess (40). A linking part (41) between the first and second fastener elements (3a, 3b) may be provided in the recess (40).

A plug assembly for use in a rolling bearing comprising at least a first ring, at least one second ring, and at least one row of rolling elements arranged between the rings. The first ring is provided with an opening for inserting rolling elements into a space between raceways or for taking rolling elements out of the space between the raceways for assembly and maintenance. The plug assembly comprises a plug configured to close the opening when the bearing is operating. The plug includes an inner end face facing the rolling elements and an outer end face opposite to the inner end face. The bearing can further comprise a protective cap shielding the outer end face of the plug from a corrosive environment of the bearing.

An upstanding cylinder and a loading lid are produced respectively from glass. On the upper face of the bottom plate of the cylinder, a substance-pooling concave in which wine lees and tartar are pooled is formed. Owing to this constitution, there is little risk that the external air enters through a gap between the sliding faces of these members into the wine-pooling section in the cylinder and causes the oxidation of the wine. Since the cylinder comprises glass, the wine can be stored under almost the same conditions as in bottles. Further, sanitary precautions can be easily taken. Furthermore, problems such as the sticking of the cylinder to the loading lid due to stainless steel rust and so on can be overcome.

An ink fountain allows ink lines wrapped on the scroll body to contact with ink immersing components immersed with ink; uses a needle component to pierce into the surface of timber or the like objects; performs ink lines on the object surface; arranges a coil spring in the internal circumstance of the scroll body for rollback ink lines, wherein, a rotor plate for storing power for the coil spring is configured to expose from the upper surface of the body; and provides a block on the rotor plate for limiting the rollback of the coil spring, wherein, the block is introduced to freely project from and fall back to the lateral surface of the rotor plate, and is blocked to a blocking dent provided on the body side through a force application apparatus. The invention provides an ink fountain in which the load application of coil spring of the revolution axis can be easily released only by a hand, and the ink will not stick on the fingers upon replacing the ink immersing components.

A woven tubing for use in a stent type blood vascular prosthesis, using a monofilament having a flattening in the range of 1.2-5.0 and a size in the range of 11-250 dtex in at least part of the warp and a stent type blood vascular prosthesis using the tubing are disclosed. The prosthesis combines a shape retaining property that is capable of maintaining its tubular shape without being crushed by the flow of blood with a high liquid tightness that is capable of reducing the leakage of blood to the exterior and allows prevention of the inflow of blood into the lesion.

The invention discloses a metal product. The metal product comprises a metal matrix, a first hole, protrusions and third holes; the first hole is formed in the surface of the metal matrix; the protrusions are located on at least one surface of the surface, not provided with the first hole, of the metal matrix and the surface of the first hole; second holes are defined by the protrusions; and the third holes are located in at least one surface of the surfaces of the protrusions and the surface, not covered by the protrusions, of the metal matrix. According to the metal product, the micron-sizedfirst hole, the sub-micron-sized second holes and the nano-sized third holes are formed in the metal matrix, so that the bonding strength between the metal product and a material body is enhanced. The invention further provides a preparation method for the metal product, a metal complex and a preparation method for the metal complex.

The invention provides a processing liquid feeder of a processing liquid recovery type which allows effective prevention of leakage of the processing liquid from the enclosure during processing of a substrate even when the upper and lower enclosures are made of a hydrophobic material and are long in both the width direction and the substrate-carrying direction. An upper wing 25 and a lower wing 35 are arranged on each outside surface of upper and lower nozzle blocks 22 and 32 arranged in the upper and lower enclosures, respectively, so as to protrude in the substrate-carrying direction and allow the substrate B to pass through. The upper and lower wings 25 and 35 are located so that the distance between their opposing surfaces is shorter than that between the opposing surfaces of the upper bottom plate 21 and the lower top plate 34.

A process of machining a scroll member of a scroll compressor by using a non-rotary cutting tool. The non-rotary cutting tool is to be moved relative to a workpiece in a predetermined direction for cutting the workpiece, with its rake face being held substantially perpendicular to the predetermined direction. The cutting tool includes (a) a generally cylindrical shank portion, and (b) a generally semi-cylindrical body portion which has an outer circumferential surface constituted by the rake face and a semi-cylindrical surface. The semi-cylindrical body portion has a cutting edge which is defined by an edge of the rake face and which is covered with a diamond coating.

A tightening string is used in an endoscope for firmly securing an outer cover of a flexible tube of the endoscope onto an internal member disposed inside the outer cover. The tightening string is comprised of a filament assembly formed by bundling a plurality of filaments made of a synthetic resin. The invention also provides an outer cover securing method, a flexible tube for an endoscope, and an endoscope equipped with the flexible tube. An outer cover securing method using the tightening string, a flexible tube for an endoscope equipped with the thus secured outer cover, and an endoscope equipped with the flexible tube are also provided.

A flow channel module comprises a flow channel plate, a flow channel connection block, and a pressing mechanism. The flow channel plate is provided with a main body and a protrusion section protruding in the circumferential direction from the peripheral edge of the main body, the protrusion section having a port communicating with an inner flow channel. The flow channel connection block is provided with a concave section for being engaged with the protrusion section and having inside a port facing surface for facing the port, and an outer flow channel connection section that is connected to the port facing surface by a flow channel. The pressing mechanism is configured to press the protrusion section inserted in the concave section and the port facing surface against each other so that the flow channel and the port are connected while maintaining air tightness or liquid tightness.