Abstract: An overflow pipe assembly includes an overflow pipe having an end portion. An adaptor is connected to the end portion of the overflow pipe and includes a first connection portion formed to the center thereof. A second connection portion which is a slot, and a third connection portion which is a bore, are respectively formed to two ends of the adaptor. A cover includes multiple protrusions which are engaged with the engaging portions of the adaptor to connect the cover to the adaptor. When installing the adaptor to an overflow pipe with two tubular parts, the adaptor does not shift by extending bolts through the second and third connection portions and connected to the two tubular parts. When installing the adaptor to an overflow pipe with a single tube, a bolt extends through the first connection portion and is connected to the tube.

Abstract: An adaptor for connecting a cover to an overflow pipe includes an H-shaped body which is installed in an end portion of the overflow pipe. The lengthwise length of the adaptor is not longer than the outer diameter of the end portion of the overflow pipe. The adaptor includes a first connection portion formed to the center of the adaptor, and two second connection portions respectively formed to two ends of the adaptor. Two lateral sides are formed to two sides of the adaptor. The cover includes a notch communicating with the end portion of the overflow pipe. Multiple protrusions extend from the inner bottom of the cover. The protrusions are engaged with the two lateral sides of the adaptor to connect the cover to the adaptor. Bolt(s) extend through first or second connection portions of the adaptor and are connected to the end section of the overflow pipe.

Abstract: A drain valve structure contains: a body and a stop assembly. The body includes: an accommodation holder, a fixing holder, and a connection seat. The accommodation holder has a threaded groove, a through hole, and a threaded section. The fixing holder includes a first coupling segment, a connecting section, a second coupling segment, and a stepped orifice. The connection seat is connected with the second coupling segment and has an extension, a fitting segment, and an opening. The stop assembly includes a first ring, a second ring, and a third ring which are made of non-metal, the first ring is fixed on an inner wall of the threaded groove of the threaded section, the second ring is fitted with an inner wall of the stepped orifice of the fixing holder, and the third ring is fitted with an inner wall of the opening of the connection seat.

Abstract: A drainage assembly for a bathtub includes a stopper unit having a base including a drain passage and a lock hole defined through a bottom thereof. A drain pipe includes a tub shoe at one end thereof and the tub shoe communicates with the drain passage. An extension extends from the inner bottom of the tub shoe. A guide member includes a rod which includes a first connection portion formed on the first end of the rod, and a hook formed on the second end of the rod. The first connection portion is detachably connected to the extension to extend the rod through the lock hole so as to align the tub shoe with the base, and to connect the outer threads of the base with the inner threads of the tub shoe easily.

Abstract: A drainage assembly for a bathtub includes a stopper unit having a base including a drain passage and a lock hole defined through a bottom thereof. A drain pipe includes a tub shoe at one end thereof and the tub shoe communicates with the drain passage. An extension extends from the inner bottom of the tub shoe. A guide member includes a rod which includes a first connection portion formed on the first end of the rod, and a hook formed on the second end of the rod. The first connection portion is detachably connected to the extension to extend the rod through the lock hole so as to align the tub shoe with the base, and to connect the outer threads of the base with the inner threads of the tub shoe easily.

Abstract: An overflow pipe assembly of a bathtub includes an overflow pipe having a horizontal fitting end which has outer threads on outside thereof. A flange extends from the outside of the fitting end. A buffering ring is mounted to the fitting end and clamped between the flange and the wall of the bathtub. Two slots are defined axially in the passage of the fitting end. A locking ring is threadedly connected to the outer threads of the overflow pipe. A cap is mounted to the fitting end and has a peripheral wall which includes multiple drain holes. The cap has a tubular portion inserted into the passage. The tubular portion has a central hole which communicates with apertures defined through the wall of the tubular portion. The tubular portion has two protrusion which are engaged with the slots of the fitting end.

Abstract: A tube coupling device having a check valve contains: a coupling body and a valve assembly. The coupling body includes a tubular member and a circular connecting seat, the tubular member is hollow to flow water, and the coupling body also includes an isolation sleeve for covering on an inner wall of the tubular member, such that the isolation sleeve separates the water from the tubular member, and the isolation sleeve has a flow channel for flowing the water. The locking set is disposed between the tubular member and the isolation sleeve and includes a protruded rib extending inwardly around the tubular member and retained between the isolation sleeve and the tubular member. The locking set also includes a retaining groove formed on the isolation sleeve and retaining with the protruded rib, and the retaining groove engages with the protruded rib and covers three sides of the protruded rib.

Abstract: An overflow assembly includes an overflow pipe having a mounting end. Multiple engaging portions are defined in the outer periphery of the mounting end. Each engaging portion has an opening and a toothed section. The opening opens to the distal end of the mounting end and communicates with an L-shaped path. The toothed section is defined in one of insides of the path. A collar is rotatably mounted to the mounting end and a protrusion extends radially and inward from the inner periphery of the collar so as to be engaged with the toothed section. The collar is rotated by engaging the protrusion with the toothed section and contacts against the bathtub's wall. An O-ring is axially mounted to the collar. A cap having an overflow aperture is mounted to the collar. The collar is cooperated with the toothed section and no threads are needed.

Abstract: A ball valve includes an inner valve unit having a ball valve unit and a valve seat in which the ball valve unit is received. A shaft extends from the ball valve which is clamped between two retainers. The valve seat has a tubular shank and a lateral hole is defined radially through the shank. The shaft extends through the valve seat. The housing is made of metal and has a chamber for receiving the inner valve unit. The housing has an inlet and an outlet which is located corresponding to the lateral hole of the valve seat and the central holes of the retainers. The shaft extends through the installation hole of the housing and is connected with a switch which is operated to rotate the ball valve between open and sealed positions. The water does not contact the metallic parts and the structure is simple and easily assembled.

Abstract: An overflow assembly for a bathtub includes an overflow drain pipe which has a head, and the head has a flange extending radially therefrom which contacts the inside of the wall of the bathtub. A sleeve extends from the end face of the head and extends through an install hole of the wall of the bathtub. The head has an opening which communicates with the overflow drain pipe. An adapter is connected to the sleeve and secured to the head by bolts. A ring is engaged with the stepped outer surface of the adapter. A cap is mounted to the adapter, and the ring snugly contacts the inner surface of the cap.

Abstract: A tube coupling device having a check valve contains: a coupling body and a valve assembly. The coupling body includes a tubular member and a circular connecting seat, the tubular member is hollow to flow water, and the coupling body also includes an isolation sleeve for covering on an inner wall of the tubular member, such that the isolation sleeve separates the water from the tubular member, and the isolation sleeve has a flow channel for flowing the water. The locking set is disposed between the tubular member and the isolation sleeve and includes a protruded rib extending inwardly around the tubular member and retained between the isolation sleeve and the tubular member. The locking set also includes a retaining groove formed on the isolation sleeve and retaining with the protruded rib, and the retaining groove engages with the protruded rib and covers three sides of the protruded rib.

Abstract: A tube coupling device includes a coupling member having an upper peripheral casing formed by a peripheral flange and a peripheral wall, a number of openings formed in the peripheral flange and communicative with an environment of the peripheral casing, a water guide plate engaged into the peripheral fence and engaged with the peripheral wall and having one or more passages, a partition member engaged into the peripheral casing and having a bore for water to flow into the coupling member, and a receptacle engaged into the coupling member, a valve member biased by a spring biasing member to engage with the partition member and to form a check valve.

Abstract: A tube coupling device includes a lock nut having a peripheral flange, an adapter having a peripheral rib for engaging with the peripheral flange, a male element having an outer thread threaded to the lock nut, and a washer disposed between the adapter and the male element and to be compressed between the adapter and the male element, and the adapter includes an engaging member extended from the peripheral rib and having an area smaller than that of the peripheral rib for decreasing a contact area between the washer and the adapter, the male element includes an engaging member having a decreased area for decreasing a contact area between the washer and the male element.

Abstract: A tube coupling device includes a coupling member having an upper peripheral casing formed by a peripheral flange and a peripheral wall, a number of openings formed in the peripheral flange and communicative with an environment of the peripheral casing, a water guide plate engaged into the peripheral fence and engaged with the peripheral wall and having one or more passages, a partition member engaged into the peripheral casing and having a bore for water to flow into the coupling member, and a receptacle engaged into the coupling member, a valve member biased by a spring biasing member to engage with the partition member and to form a check valve.

Abstract: A tube coupling device includes a lock nut having a peripheral flange, an adapter having a peripheral rib for engaging with the peripheral flange, a male element having an outer thread threaded to the lock nut, and a washer disposed between the adapter and the male element and to be compressed between the adapter and the male element, and the washer includes a cylindrical member for engaging into the bore of the adapter and for contacting an inner peripheral portion of the adapter, and for preventing the adapter and the male element from being rusted, and for preventing the heavy metal or other poisonous materials from being released from the adapter and the male element.

Abstract: Membrane switches are manufactured by electrically conductive pastes consisting of 55 to 65% by weight of metal powder in the shape of flake (silver, aluminum, copper or the alloy thereof), 35 to 60% by weight of an organic solvent at high boiling point, 5 to 15% by weight of organic thermal plastic, including mainly saturation polyester polymer, and 0.5 to 5% by weight of additives, including trietheanolamine, adhesion promoter, defoamer, leveling agent, thixotropic agent etc. The silver paste is of excellent adhesion on ITO film or ITO glass, delivers conductivity high up to 20 m?/? with less than 65% by weight of silver, and passes test under the conditions (85?, 85% RH, 1000 hours).

Abstract: Membrane switches are manufactured by electrically conductive pastes consisting of 55 to 65% by weight of metal powder in the shape of flake (silver, aluminum, copper or the alloy thereof), 35 to 60% by weight of an organic solvent at high boiling point, 5 to 15% by weight of organic thermal plastic, including mainly saturation polyester polymer, and 0.5 to 5% by weight of additives, including trietheanolamine, adhesion promoter, defoamer, leveling agent, thixotropic agent etc. The silver paste is of excellent adhesion on ITO film or ITO glass, delivers conductivity high up to 20 m?/? with less than 65% by weight of silver, and passes test under the conditions (85?, 85% RH, 1000 hours).