Abstract: A dispensing head for an air pump includes a sleeve connected to the air pump and a chamber is defined in an end of the sleeve. The end having the chamber of the sleeve is received in a housing and a mount piece is securely received in the housing. A first seal ring is mounted to the mount piece and in contact with an inner periphery of the chamber. The mount piece includes a plurality of inner threads defined axially in a central passage in the mount piece, so that the threaded section of a French valve is threadedly connected to the inner threads. A second groove is defined in the mount piece and a second seal ring is engaged with the second groove. The second seal ring is mounted to a neck of the French valve.

Abstract: An air pump nozzle includes a housing with an inflation hole. An inner space of the housing lodges a block assembly seat having a compartment at an end. The compartment lodges a block member having an insertion hole. A needle tube with an air outlet is inserted through the insertion hole and is retained to avoid being disaffiliated from the block member. The design of separate needle tube and block assembly seat can simplify the manufacturing procedure and product assembly, as well as reduce the manufacturing cost.

Abstract: A biochemical test strip is provided. The biochemical test strip includes an insulating substrate, an electrode system, an insulating layer, and a cover. The electrode system is formed on the insulating substrate and the insulating layer is formed on the electrode system. The insulating layer has an opening, and the opening exposes a part of the electrode system to define a reaction region with a supply port. The cover is formed above the insulating layer to cover the reaction region and has a slot corresponding to the reaction region and a sampling hole corresponding to the supply port.

Abstract: A pump includes a cylinder including at least one upper aperture and lower aperture. A piston is movable in the cylinder. A rod is connected to the piston. A ring is provided around the rod and fit in the cylinder. An upper collar is formed with at least one countersink hole and provided around the cylinder. At least one upper threaded bolt is driven into the ring through the countersink hole, the upper aperture and an upper elastic washer. A base includes a reduced portion fit in the cylinder. A check valve is provided on the reduced portion of the base. A lower collar is formed with at least one countersink hole and provided around the cylinder. At least one lower threaded bolt is driven into the reduced portion of the base through the countersink hole of the lower collar, the lower aperture and a lower elastic washer.

Abstract: Pump connector for Presta valve is disclosed in which one end of a pump connector valve seal is formed with a hollow chamber, and is disposed inside a space of a cap having a channel. The hollow chamber is assembled with a valve seal insert which includes a through hole. The second end of the through hole is formed with an inner edge corresponding to the shape of the shoulder section of the Presta valve. An end cap is assembled with the cap for preventing the pump connector valve seal from separating from the cap. Accordingly, the Presta valve can be screwed together with a first internal thread of the cap, and at the same time the shoulder section of the Presta valve is tightly fitted to the inner edge of the valve seal insert for direct inflation.

Abstract: A portable air pump includes a tubular body, a barrel, a piston mechanism, a head, and a dispensing head. Tubular body has upper cover having air inlet holes and sealed bottom cover. Barrel has air passage running through along its axis direction. Piston, having center hole and through hole, and check valve is in between second end of the barrel and piston. As tubular body is moved in relation to barrel away from the head, air is flown into tubular body through air inlet holes and to the bottom of tubular body through the through hole. Air can be prevented from flowing out from the center hole using check valve disc. As the tubular body is moved in relation to the barrel towards the head, air on the bottom of tubular body is flown into air passage of the barrel through center hole, and out from the head and the dispensing head.

Abstract: A universal air pump includes a pump; a head mounted to the pump and having a central hole and an air inlet at a side wall thereof; a cylindrical block pivotably fitted in the central hole of the head and having a central chamber, an annular channel on an outer surface thereof, which faces to the air inlet of the head, and at least one air hole defined through an underside of the annular channel and communicating with the central chamber; a fixing seat having a stub tube engaged with the central chamber of the cylindrical block, and an axially-extended through hole communicating with the central chamber; and an air delivery tube mounted to the fixing seat and communicating with the axially-extended through hole. Thus the air delivery tube can rotate relative to the head so as to allow the air pump to be operated at any angle.

Abstract: An air nozzle includes a hollow casing, a plug received in the chamber and having a channel defined through the plug, a central tube movably received inside the channel of the plug and having an outer threading formed on an outer periphery thereof, a nozzle rotatably received inside the chamber and having a nose out of the top open end of the hollow casing and a compartment to receive therein the central tube and the plug and a cap to secure the nozzle, the central tube and the plug inside the hollow casing such that movement of the central tube allows the air nozzle to adapt to various positions of a central pin of a second air nozzle in an object for inflation.

Abstract: An air pump nozzle includes a housing with an inflation hole. An inner space of the housing lodges a block assembly seat having a compartment at an end. The compartment lodges a block member having an insertion hole. A needle tube with an air outlet is inserted through the insertion hole and is retained from affiliating from the block member. The design of separate needle tube and block assembly seat can simplify the manufacturing procedure and product assembly, as well as reduce the manufacturing cost.

Abstract: A hand-operated inflator with dual cylinder is provided. Once the cylinders are pulled out on two sides of the central block to form a line axially, and a clamp plate at mid point in between the two cylinders is turned to the transversal position to lock the cylinders in place, the inflator is set for refilling operation. The two cylinders can be folded back when the clamp plate is released, making it easy for carrying and storage with the length reduced by half. The inflator is able to inflate an object with faster rate as compared with the conventional inflators with only one air cylinder. Moreover, the central block can be attached with a pressure meter. If the measured air pressure inside the object gets excessively high, air can be safely released through an over pressure valve.

Abstract: Disclosed is a pressure gauge including a body forming an inlet, an outlet, and a shunt hole. A pressure meter is provided to the shunt hole. An inlet duct in connection with an inflation device is provided to the inlet. A check valve is arranged in the inlet duct. An outlet duct is connected to the outlet and is prepared with an inflation mouth for coupling with an intake nozzle of an object to be inflated. When an inflation device is operated to charge air into an object for inflation through the inlet duct, the body, and the outlet duct, a pressure measuring process can be performed concurrently.

Abstract: Disclosed is a pressure gauge including a body forming an inlet, an outlet, and a shunt hole. A pressure meter is provided to the shunt hole. An inlet duct in connection with an inflation device is provided to the inlet. A check valve is arranged in the inlet duct. An outlet duct is connected to the outlet and is prepared with an inflation mouth for coupling with an intake nozzle of an object to be inflated. When an inflation device is operated to charge air into an object for inflation through the inlet duct, the body, and the outlet duct, a pressure measuring process can be performed concurrently.

Abstract: An air nozzle includes a hollow casing, a plug received in the chamber and having a channel defined through the plug, a central tube movably received inside the channel of the plug and having an outer threading formed on an outer periphery thereof, a nozzle rotatably received inside the chamber and having a nose out of the top open end of the hollow casing and a compartment to receive therein the central tube and the plug and a cap to secure the nozzle, the central tube and the plug inside the hollow casing such that movement of the central tube allows the air nozzle to adapt to various positions of a central pin of a second air nozzle in an object for inflation.

Abstract: A hand-operated inflator with dual cylinder is provided. Once the cylinders are pulled out on two sides of the central block to form a line axially, and a clamp plate at mid point in between the two cylinders is turned to the transversal position to lock the cylinders in place, the inflator is set for refilling operation. The two cylinders can be folded back when the clamp plate is released, making it easy for carrying and storage with the length reduced by half. The inflator is able to inflate an object with faster rate as compared with the conventional inflators with only one air cylinder. Moreover, the central block can be attached with a pressure meter. If the measured air pressure inside the object gets excessively high, air can be safely released through an over pressure valve.

Abstract: An inflator includes a hollow handgrip and an air cylinder having a shaft. One end of the shaft is connected with a piston in the cylinder and the other end of the shaft is provided with a stud extending out of the cylinder. A bottom wall and an opening are arranged respectively at opposite ends of the handgrip. A tapped hole is formed in the bottom wall for locking the stud. Through the opening, the cylinder may be stored in the handgrip to lessen the volume of the inflator. When using the inflator, a user draws the cylinder out of the handgrip and lock the stud to the tapped hole through the bottom end of the handgrip to thereby extend the shaft. Air is pumped out through an outlet of the cylinder by reciprocal axial motion of the shaft.

Abstract: The present invention relates to a liquid crystal display device, which comprises a top polarizer and a lower polarizer, a liquid crystal cell, and a back light assemble, the device is characterized in that the lower polarizer is subjected to an anti-glaring treatment while the top polarizer is not. In the liquid crystal display device (LCD) according to the present invention, since the top polarizer is not subjected to the anti-glaring treatment, the prepared device exhibits a vision property similar to that of cathode ray tube (CRT) display device without brownish nor glittering problems associated with conventional LCD in which a top polarizer is subjected to anti-glaring treatment.

Abstract: The present invention provides a method for determining the concentration of an analyte in a test sample, comprising the following steps: (a) assembling an amperometric biosensor, which comprises at least an electrode system and an electric mediator for redox, and applying a predetermined potential to the electrode system; (b) applying a test sample to the biosensor and immediately gradually lowering the predetermined potential to a value unable to drive the electrochemical redox of the electric mediator; (c) after a sufficient reaction time, applying a second potential to the electrode system of the biosensor to drive the electrochemical redox of the electric mediator; and (d) measuring the electrochemical current of the electrode system and determining the concentration of the analyte.

Abstract: A dual-direction pump includes two cylinders arranged on opposite sides of a head portion and an inlet return-flow prevention device and a leakproof device mounted between the cylinder and the head portion for avoiding leakage at the juncture between the cylinder and the head portion or leakage induced by reverse flow in one of the cylinders in the case of a single-sided pumping operation in the other cylinder. The head portion has an outlet port to which an outlet return-flow prevention device is mounted. A knob is rotatably mounted to the outlet pot and a nut is fixed to the knob for selectively engaging an inflation valve to avert detachment. The outlet return-flow prevention device prevents reverse or return flow induced in the outlet port in order to reduce resistance caused thereby and enhances pumping efficiency.

Abstract: A biosensor for detecting contents of biochemical components in a sample, comprising an electrically insulating substrate, a working electrode disposed on said substrate, a reference electrode disposed on said substrate, which is spaced from said working electrode, a reaction layer disposed on said working electrode and said reference electrode, wherein said reaction layer and said electrodes form a reaction area for reacting with the sample, an electrically insulating layer disposed on said substrate and having an opening for receiving the sample, wherein said opening exposes a portion of said reaction area and the end of said opening is located at the edge of the biosensor; and a reticular covering layer which covers said opening and the end of said opening of said insulating layer wherein said reticular layer and said insulting layer form a sampling area from said reticular covering area to the edge of said biosensor.