33results about How to "Ensure liquid tightness" patented technology

Disclosed is an electrochemical gas sensor wherein interference errors are minimized. In an electrochemical gas sensor wherein an object gas to be sensed is taken into an electrolyte solution through an air-permeable membrane and an electrical signal corresponding to the concentration of the object gas is output, an air-permeable membrane (4) constituting a working electrode member (4') is made of a kneaded body of a carbon black fine powder and a fluororesin fine powder, and an electrode catalyst layer (13) is formed on a side of the air-permeable membrane (4) which side faces an electrolyte solution (6).

A syringe barrel includes an barrel main body having a female luer at a distal end of the barrel main body, the female luer being configured such that a male luer is insertable into and connectable to the female luer; and a cap that is detachably attached to the female luer to close an opening of the female luer. The female luer has a female luer-side connector, and the cap is detachably attached to the female luer via the female luer-side connector. The cap includes an insertion part inserted into the female luer, a sealing part that seals the opening of the female luer, and a cap-side connector that is detachably engaged with the female luer-side connector.

A diaphragm pump is provided. The diaphragm includes an upper housing, a diaphragm, and a lower housing. Recessed parts are formed in the surfaces of the upper and lower housings that face the diaphragm to define an upper pump chamber and a lower pump chamber above and below the diaphragm. A suction port and a discharge port are formed in the lower housing to communicate with the lower pump chamber. Branch channels are formed in the lower housing and the upper housing to communicate the suction port and the discharge port with the upper pump chamber. Suction-side check valves are respectively provided between the suction port and the upper pump chamber and between the suction port and the lower pump chamber. Discharge-side check valves are provided between the discharge port and the upper pump chamber and between the discharge port and the lower pump chamber.

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.

The objective of the invention is to provide a structure capable of maintaining lubricant effect of a gear train composed of a sun gear, a planetary gear and a central gear constantly in a long time in a planetary gear type selvage device. In the planetary gear type selvage device, comprising a non-rotating component including an opposite surface relative to a periphery surface formed on a planet support along the whole periphery in redial direction of the rotating shaft, and the non-rotating component can not be arranged rotatly; and a accommodation space for accommodating the gear train composed of a a sun gear, a planetary gear and a central gear, which is defined by the planet support and the non-rotating component for accommodating the gear train. Furthermore, to the accommodating space, while a contact-type oil seal is mounted between a rotating driven planet support and a surface relative to the non-rotating component in the radial direction for maintaining liquid sealing, the accommodation space is stored with lubricating oil.

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).

The present invention provides a filtration device combined with self-priming pump in which a filter replacement work is easy and safe, and removal of air inside of a pump and priming are not necessary. And this filtration device is characterized to provide with a pump unit, which is a valveless-construction self-priming pump without a check valve, including a suction port, a suction chamber, an impeller, a self-priming chamber, a discharge port from an upstream of a channel to a downstream thereof in this order, the suction port and the discharge port being arranged above the level of the suction chamber and the impeller, and a self-priming chamber arranged above the level of the suction port and the discharge port; a filtration unit arranged on a channel between the self-priming chamber and the discharge port and above the level of the self-priming chamber; and a filter arranged inside of the filtration unit and above the level of residual liquid inside of the pump unit at the time of suspending of the pump unit.

The present invention provides a filtration device combined with self-priming pump in which a filter replacement work is easy and safe, and removal of air inside of a pump and priming are not necessary. And this filtration device is characterized to provide with a pump unit, which is a valveless-construction self-priming pump without a check valve, including a suction port, a suction chamber, an impeller, a self-priming chamber, a discharge port from an upstream of a channel to a downstream thereof in this order, the suction port and the discharge port being arranged above the level of the suction chamber and the impeller, and a self-priming chamber arranged above the level of the suction port and the discharge port; a filtration unit arranged on a channel between the self-priming chamber and the discharge port and above the level of the self-priming chamber; and a filter arranged inside of the filtration unit and above the level of residual liquid inside of the pump unit at the time of suspending of the pump unit.

There is disclosed an electrode cartridge for use in a hermetic zinc secondary battery comprising a separator structure including a separator exhibiting hydroxide ion conductivity and water impermeability; a counter member liquid-tightly sealed to the separator structure so as to form an internal space and constituting an open-top water impermeable case together with the separator structure; and an electrode that is accommodated in the internal space of the water impermeable case and is a negative electrode containing zinc and / or zinc oxide or a positive electrode. According to the present invention, there is provided an electrode built-in component that can reliably isolate the positive and negative electrodes from each other with a hydroxide ion conductive separator, in the form of an electrode cartridge that is easy to handle and manufacture and that is more advantageous for assembling a stacked-cell battery, while reducing the number of sealing joints.

This medical instrument with attached needle is provided with a needle shaft (2) having a needle tip (2a) capable of piercing a living body and a needle hub (5) for immobilizing and holding the middle of the needle shaft (2) by high frequency welding so that the needle tip (2a) protrudes from one end and the base end (2b) of the needle shaft (2) protrudes from the other end. It also has a seal part (8) configured of an elastic component and provided on the outer circumference of the base end (2b) of the needle shaft (2) so as to be fluid-tight, and a liquid-accommodating part (9) having a liquid chamber capable of accommodating a liquid therein. With the base end (2b) of the needle shaft (2) communicating with the liquid chamber, the seal part (8) is compressed and clamped by the needle hub (5) and the liquid-accommodating part (9).

A medical instrument with attached needle of the present invention includes: a needle tube having a needle tip capable of piercing a living body; and a seal member composed of an elastic member and provided to hold an outer surface of the needle tube in a liquid-tight manner in a condition where the needle tip protrudes from one end and a proximal portion on a side opposite to the needle tip protrudes from the other end. The instrument also has: a liquid containing section having a liquid chamber capable of containing a liquid therein; and a needle seating section formed at one end of the liquid containing section. The seal member is in contact with an inner surface of the needle seating section and is disposed within the needle seating section in a compressed state. The proximal portion of the needle tube communicates with the liquid chamber.

This medical instrument with attached needle is provided with a needle shaft (6) with a needle tip capable of piercing a living body and a seal part (5), which is obtained from an elastic part and holds the outer surface of the needle shaft (6) in a fluid-tight manner so that the needle tip (6a) capable of piercing a living body protrudes from one end and the base end (6b) at the end opposite the needle tip (6a) protrudes from the other end. The instrument also has a liquid-accommodating part (3) with a liquid chamber (10) capable of accommodating a liquid therein and a needle-seating part (2) formed on one end of the liquid-accommodating part (3). The seal part (5) is in contact with the inner surface of the needle-seating part (2) and is set within the needle-seating part (2) in a compressed state. The base end (6b) of the needle shaft (6) communicates with the liquid chamber (10).

The invention provides a fuel pump module, which has the advantages that good sealing is established and the manufacturing steps and the manufacturing cost are reduced. The fuel pump module (12) comprises a fuel pump (31), which comprises a suction inlet in a first end and a discharge outlet (38) in a second end opposite to the first end; a first shell part (51), which is made of resin and holds the first end and the second end of the fuel pump (31); and a second shell part (52), which has a continuous welding area (56) in the whole circumference of an open end (55) butt-jointed to the open end (54) of the first shell part (51). A storage space (53) of the fuel pump (31) is formed between the first shell part (51) and the second shell part (52).

There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; a layered double hydroxide (LDH) separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab. The LDH separator has at least two continuous closed edges, provided that an edge, adjacent to the negative-electrode collector tab, of the LDH separator is open.

The present invention provides a filtration device combined with self-priming pump in which a filter replacement work is easy and safe, and removal of air inside of a pump and priming are not necessary. And this filtration device is characterized to provide with a pump unit, which is a valveless-construction self-priming pump without a check valve, including a suction port, a suction chamber, an impeller, a self-priming chamber, a discharge port from an upstream of a channel to a downstream thereof in this order, the suction port and the discharge port being arranged above the level of the suction chamber and the impeller, and a self-priming chamber arranged above the level of the suction port and the discharge port; a filtration unit arranged on a channel between the self-priming chamber and the discharge port and above the level of the self-priming chamber; and a filter arranged inside of the filtration unit and above the level of residual liquid inside of the pump unit at the time of suspending of the pump unit.

There is provided a secondary zinc battery including: a unit cell including; a positive-electrode plate including a positive-electrode active material layer and a positive-electrode collector; a negative-electrode plate including a negative-electrode active material layer containing zinc and a negative-electrode collector; a layered double hydroxide (LDH) separator covering or wrapping around the entire negative-electrode active material layer; and an electrolytic solution. The positive-electrode collector has a positive-electrode collector tab extending from one edge of the positive-electrode active material layer, and the negative-electrode collector has a negative-electrode collector tab extending from the opposite edge of the negative-electrode active material layer and beyond a vertical edge of the LDH separator. The unit cell can thereby collects electricity from the positive-electrode collector tab and the negative-electrode collector tab. The LDH separator has at least two continuous closed edges, provided that an edge, adjacent to the negative-electrode collector tab, of the LDH separator is open.

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.

The invention provides a tailor welding method for a hydraulic support push rod with a liquid supply and return function. A push rod comprises a cover plate, a middle plate, a bottom plate and a liquid supply and return mechanism, before a connector base and a liquid passing pipe are welded, before the connector base and the middle plate are welded and before the connector base and the cover plate are welded, a metal plug is installed in a liquid passing hole of the connector base firstly, the metal plug is formed by machining round steel, the metal plug comprises a blocking cover, a plug body and an external thread section which are sequentially connected from top to bottom, the diameter of the blocking cover is larger than the inner diameter of the liquid passing hole, the diameter of the plug body is less than the inner diameter of the liquid passing hole by 2 millimeters, an annular groove is formed in the connecting position of the plug body and the external thread section, internal threads matching with each other are arranged at the position, corresponding to the external thread section, of the deep position of the liquid passing hole, and the number of threads of the external thread section is not larger than 3. The tailor welding method for the hydraulic support push rod with the liquid supply and return function has the advantages of being scientific in design, not prone to deformation, high in product reliability and long in service life.

A syringe barrel includes an barrel main body having a female luer at a distal end of the barrel main body, the female luer being configured such that a male luer is insertable into and connectable to the female luer; and a cap that is detachably attached to the female luer to close an opening of the female luer. The female luer has a female luer-side connector, and the cap is detachably attached to the female luer via the female luer-side connector. The cap includes an insertion part inserted into the female luer, a sealing part that seals the opening of the female luer, and a cap-side connector that is detachably engaged with the female luer-side connector.

The objective of the invention is to provide a structure capable of maintaining lubricant effect of a gear train composed of a sun gear, a planetary gear and a central gear constantly in a long time in a planetary gear type selvage device. In the planetary gear type selvage device, comprising a non-rotating component including an opposite surface relative to a periphery surface formed on a planetsupport along the whole periphery in redial direction of the rotating shaft, and the non-rotating component can not be arranged rotatly; and a accommodation space for accommodating the gear train composed of a a sun gear, a planetary gear and a central gear, which is defined by the planet support and the non-rotating component for accommodating the gear train. Furthermore, to the accommodating space, while a contact-type oil seal is mounted between a rotating driven planet support and a surface relative to the non-rotating component in the radial direction for maintaining liquid sealing, the accommodation space is stored with lubricating oil.

A container stopper having a cap having a peripheral wall engaging around a container neck, and an olive-shaped seal provided with a peripheral annular flange for engagement in a container opening, the inner surface of the olive-shaped seal providing a ribbed wall surface, the ribbed wall surface is defined by a plurality of slots and webs extending longitudinally on the wall of the olivary seal.

A valve-controlled dispensing closure (1), suitable for a container (3) containing a fluid, fits snugly to the neck of the container to ensure liquid-tightness of the container, comprising: a plug body (23), arranged to be inserted into the neck of the container , with a central fluid channel and a peripheral air channel; a double-valve diaphragm (22), made of a flexible elastic material, arranged in a recess provided on the upper part of the plug body (23) to cover the fluid and air channels; the plug cover ( 21), sealing the double valve diaphragm (22) inside the plug body (23), having one or more slots arranged annularly and axially aligned with the air passage of the plug body (23), and having The central fluid channel of the plug body (23) is axially aligned with the central orifice. The double valve diaphragm (22) comprises a first valve section which is a normally closed valve (22d) having a slit-type central orifice (22a) and which seals the central fluid passage of the plug body (23) when in the rest position and is normally closed. The umbrella valve (22b) closes the valve and seals the second valve section of one or more slots of the plug cover (21) when in the rest position.

The present invention provides a plastic cap formed as a highly producible one-piece type cap at the time of molding which becomes a two-piece type cap excellent in sealability and openability at thetime of use in which a small-diameter dispensing opening can be formed. The plastic cap comprises: a cap body (1) that is formed of a top plate section (2) and a skirt section (3), that has a dispensing nozzle (8) formed on the outer surface of the top plate section (2) so as to surround a part to be opened, and that is fitted and fixed to a container mouth part (60); and a top lid (20) which comprises a top surface (21) and a circumferential wall (22) hanging from the outer peripheral edge of the top surface (21). The plastic cap is characterized in that: the top lid (20) has formed thereon aprotrusion section (27) which protrudes downward from an inner surface of the top surface (21) and has an engaging part (28) on an outer surface thereof; and the cap body (1) has formed therein an inner plug (30) which comprises an annular sidewall (31) having an outer diameter that can come into close contact with the inner surface of the dispensing nozzle (8) and a bottom section (32) formed ata lower part of the annular sidewall (31), wherein the inner plug (30) is integrally formed, via a breakable weakened part (10), with the cap body (1) at a position below a seal part of the dispensing nozzle (8) that has an inner diameter that can come into close contact with the inner plug (30), and has an engageable part (33) formed on an inner surface of the annular sidewall (31) that vertically engages with the engaging part (28) of the protrusion section (27).

The invention relates to a household electrical appliance for cooking, comprising a working container (3) with a lateral wall (11), a rotary working accessories (4) arranged in the working container (3), and an upper part (2) arranged on the working container (3). The invention is characterized in that: the upper part (2) comprises a sealing gasket (23) with a deformable circular lip (25) arranged on a depression (15) on the internal surface of the lateral wall (11), the upper part (2) also comprises a power chamber (6) which comprises the driving device (31) of the rotary working accessories (4) and a switch (32) connected with a controller (33), the controller (33) is active between the stop position and the working position, in the stop position, the processing electric appliance is not permitted to operate, while in the working position, the processing electric appliance is permitted to operate. Based on the invention, the sealing gasket (23) supports the upper part (2), when the upper part (2) is arranged on the working container (3), the controller (33) is in the stop position, and when the pressure of the ring-shaped lip (25) deformation is applied on the power house (6), the controller (33) can be moved to the working position by the working container (3).