63results about How to "Full tightness" patented technology

The invention discloses a brushless motor which can ensure heat dissipation of a control device and meanwhile manufacturing process is simplified, manufacturing cost is reduced, and the brushless motor is minimized and has light weight. the brushless motor includes: a motor case 41 in which a cylindrical stator core 42 formed from steel plate by press molding is secured; a bracket 48 on one side in an axial direction of a motor case, a tip side of a rotary shaft 46 secured to a rotor 45 being rotatably supported by the bracket; and a housing member 51 on the other side in the axial direction of the motor case, a control device 52 for controlling the rotation of the rotor being accommodated in the housing member, the control device having a power-related circuit board 53 disposed on the side of a bottom 51b of the housing member and a control-related circuit board 54 disposed on the side of an opening of the housing member, semiconductor switching devices SW being disposed on the power-related circuit board in contact with the housing member.

A screw-threaded joint for a steel pipe includes a pin (1) and a box (2). The pin (1) has a tapered male screw thread (11), a tapered seal surface (13), and an end shoulder surface (14), while the box (2) has, in a corresponding manner, a tapered female screw thread (21), a tapered seal surface (23), and a shoulder surface (24). The pin (1) and the box (2) can be easily fastened together, and the screw-threaded joint has improved tightness at seal surfaces. The pin and the box have a contactless region (B) between the seal surfaces (13, 23) and the shoulder surfaces (14, 24), and the peripheral surfaces of the pin and the box do not make contact with each other in the contactless region (B). At least that portion of pin which is in the contactless region and adjacent the front end of the pin is a tapered surface portion (18) having substantially the same inclination angle as the tapered seal surface (13). Also, that portion of the box which is in the contactless region is substantially a circular cylindrical surface.

The invention provides a car door weather strip mounting structure capable of maintaining the high sealability even when a door is sucked outside a car when the car is traveling while maintaining the good door closability. The door weather strip 10 has a mounting base part 11 mounted on a retainer part 2a of a door sash 2, and a hollow seal part 12 which is integrated with the mounting base part 11 and elastically brought into contact with a body panel 5 when the door is closed. A part of the body panel 5 with the hollow seal part 12 elastically brought into contact therewith forms a flat parallel seal face 5a which is formed parallel or substantially parallel to the sucking direction S of a door 1 in a traveling mode.

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 sealing member comprising an elastic sheet having a density in the range of 100 to 250 kg / m<3>. The elastic sheet is obtained by reacting and curing a polyurethane-foam raw material which is provided by mixing 100% by volume of a resin raw material and 300% by volume or more of a foam-forming gas, in which the resin raw material includes polyol and isocyanate as a main raw material and a foam stabilizer as an auxiliary material, and the like. The compression load deflection at 50% of the elastic sheet is in the range of 0.003 to 0.025 MPa, and the compression load deflection at 75% thereof is in the range of 0.02 to 0.40 MPa.

An extrusion molded article for automobiles, having a body portion (1) and a hollow sealing portion (11), where the body portion (1) comprises a core (2) made of a resin having a U-shaped cross-section extending in a longitudinal direction and a covering layer (3) surrounding and covering the core partly or entirely, and the hollow sealing portion (11) is bonded integrally with an outer surface (4) of the body portion, characterized in that the covering layer (3) is made of a thermoplastic elastomer composition having a tensile elongation at break of at least 350% , as determined according to JIS K6251, and a change in 100% modulus of at most 40%, wherein the change in 100% modulus = [(100% modulus at 23 DEG C - 100 % modulus at 80 DEG C) / 100 % modulus at 23 DEG C ] x 100, and the 100 % modulus is a stress at 100% elongation, as determined according to JIS K6251, and the hollow sealing portion (11) is made of a thermoplastic elastomer composition having a tensile elongation at break of at least 250%, as determined according to JIS K6251, and a compression set of 35% or less, as determined at 25% compression, 70 DEG C, 200 hours.

A pipe connecting device of the type using an inner ring is provided which, through further review of the structure, has been improved so as to allow more repeated use than conventionally possible even while maintaining good seal performance. This pipe connecting device is provided with: an inner ring (3) which has an inner ring (3) comprising an inner peripheral part (3w) and an outer peripheral part (3G) which has a tapered outer peripheral expanded surface (3a) which is press-fitted into and expands the end (4C) of a tube (4); a pipe fitting main body (1) which has a cylindrical screw part (1A) with a male screw (7) attached; and a union nut (2) having a female screw (13) that screws onto the male screw (7). The inner ring (3) provided with the tube (4) is inserted into the cylindrical screw part (1A), and the tapered outer peripheral expanded surface (3a) is pressed by a pressing portion (12b) of the union nut (2) with the tube (4) interposed therebetween, wherein the pressing portion (12b) of the union nut (2) that presses the tube (4) between the tapered outer peripheral expanded surface (3a) is formed as an inclined inner peripheral surface which, relative to the axis (Y) of the cylindrical screw part (1A), is inclined in the same direction as the tapered outer peripheral expanded surface (3a).

The invention provides a zipper tape, a packaging bag and a manufacturing method of the packaging bag. One edge portion (224) of a female side band-shaped base (221) on the side of a storage space (15) is made thick to provide a thick portion (31). A cutting portion (32) which is thinner than the female side band-shaped base (221) is provided on the storage space (15) side of the thick portion (31). A sealing base (33) is provided at the storage space (15) side of the cutting portion (32), wherein the sealing base (33) is thicker than the female side band-shaped base (221) and is to be sealed to the inner surface (10A) of a bag body (10) to which a male side band-shaped base (211) is adhered. A sealing strength of the thick portion (31) to the inner surface (10A) on which the male side band-shaped base (211) is adhered is smaller than the seal strength of the sealing base (33). The cutting portion (32) is provided to have a seal strength smaller than the seal strength of the sealing base (33). An area surrounded by the thick portion (31), the cutting portion (32), the sealing base (33), and the inner surface (10A) of the bag body (10) becomes a substantially sealed state, and thus, if a pressure is externally applied to the bag body (10) due to dropping, etc., damage due to extension of the cutting portion (32), etc., can be prevented.

A sealant film which is provided with: a polyolefin layer that contains a polyolefin as a main component; and a polycycloolefin layer that serves as the outermost layer, while containing a polycycloolefin as a main component. The polycycloolefin comprises two or more structural units selected from among a structural unit (A) derived from a dicyclopentadiene compound, a structural unit (B) derivedfrom a tetracyclododecene compound and a structural unit (C) derived from a norbornene compound; and the polycycloolefin has a glass transition temperature of 80 DEG C or less.

The present invention provides a polypropylene resin film that has heat seal strength and sealing properties adequate for packaging a heavy object and that is also suitable for automatic packaging. Abiaxially oriented polypropylene resin film comprising a substrate layer (A), an intermediate layer (B), and a seal layer (C), the melting point of a resin constituting part of the substrate layer (A)and the seal layer (C) being in a specific range, and the thickness of each of the intermediate layer (B) and the seal layer (C) furthermore being set so that the ratio thereof with respect to the thickness of all the layers is in a specific range.

This invention provides a valve device. The valve device (1) has: a valve main body (2) that compartmentalizes a valve chamber (21) provided with an NO outflow port (25) and NC outflow port (24) through which a fluid flows; and a valve body (3) that opens / closes the NC outflow port (24) and NO outflow port (25). The valve body (3) includes: a diaphragm (6) disposed in a manner so as to cover the valve chamber (21); and a drive means (4) that, by means of pressing the diaphragm (6), can open / close the NC outflow port (24) and NO outflow port (25). A first valve seat (24b) and second valve seat (25b) are formed at the periphery of the NC outflow port (24) and NO outflow port (25). The diaphragm (6) comprises an elastic material of which the JIS-K6253 durometer A hardness is A50-A85. The pressure of the seated diaphragm (6) to the first valve seat (24b) and second valve seat (25b) is 0.5-1.0 N / mm<2>.

The invention discloses an electric power detection method, and the method employs an electric power detection device, the device comprises a detection box and a sealing cover, the detection box is internally provided with an installation cavity, the inner surface of the installation cavity is fixedly provided with a device seat, and the inner surface of the sealing cover is fixedly connected with a separation plate. The sleeve rod is pushed to move, so that the top plate and the sliding plate push the movable seat to move, and the movable seat moves to pull the movable end of the detection line to move, so that the multiple groups of detection lines pull the detection line to slide along the partition plate, and automatic carding and arrangement of the multiple groups of detection lines are realized; in the next use process, the sealing cover is opened, and the sorted detection line is directly selected from the inner surface of the sealing cover, so that disordered arrangement of detection is effectively avoided, the target detection line is conveniently selected, the convenience in actual power detection is improved, the efficiency of emergency power detection is improved, power failure reasons are diagnosed in advance, and the use effect is good.

A developing apparatus including a layer thickness adjustment member configured to regulate a layer thickness of a two-component developer carried on a surface of a developing sleeve of a developing roller is disposed so that one end portion in a width direction faces the surface of the developing sleeve at a predetermined interval. At two end portions in a longitudinal direction of the layer thickness adjustment member, a notch open to the one end side in the width direction is provided. Since an amount of conveyance of the developer locally increases at two end portions of the developing sleeve by providing such a notch in the layer thickness adjustment member, density of an ear of a magnetic brush to be formed increases, and it is possible to exhibit the sufficient seal performance and prevent the toner from being scattered.

The invention discloses a breather valve and an application method thereof. The breather valve comprises a breather tube, a valve plate and a return spring; the valve plate is disposed within the breather tube; the return spring used for returning the valve plate is disposed within the breather tube. The return spring allows the valve plate to be returned in time when a patient breathes, sealing is insufficient, and no leakage occurs.

The invention relates to a vane pump for conveying liquid (especially viscous oil), comprising: a rotor (2) having a sliding groove (23) in which a slidable vane (3) is accommodated and which can be moved relative to the radius of the rotor ( r) indentation; the pump housing (1) with the pump chamber (10) housing the rotor (2); and the inlet (5) and outlet (6) towards at least The end side of the rotor (2) is open into the pump chamber (10); wherein around the circumference of the rotor (2) radial elevations (21) protruding towards the sliding slots (23) form the recesses to the retractable vanes (3) The rotor radius (r) on either side, and at the radially raised portion (21), the radially recessed portion (20) is recessed relative to the rotor radius (r). In the radial elevation (21), on at least one end side of the rotor (2) to which the inlet (5) and the outlet (6) are open, a recess (4) is formed which provides a Rotary servo control geometry for pressure peaks in the small vane chamber.